阅读说明：本技术 热能回收装置 (heat energy recovery device ) 是由 足立成人 成川裕 西村和真 荒平一也 于 2019-05-24 设计创作，主要内容包括：目的是提供一种能够在避免在增压空气中产生的压力损失的增大的同时从增压空气将热回收的热能回收装置。一种热能回收装置(1),具备蒸发部(10)、蒸发部收容部(18)、冷却部(20)、冷却部收容部(28)、膨胀机(30)、动力回收机(32)、冷凝器(34)和循环泵(36)；蒸发部(10)具有动作介质传热管(12)和多个蒸发部翅片(14)；冷却部(20)具有冷却介质传热管(22)和多个冷却部翅片(24)；冷却部收容部(28)与蒸发部收容部(18)连接；关于宽度方向的蒸发部收容部(18)的尺寸与关于宽度方向的冷却部收容部(28)的尺寸相互相同,各蒸发部翅片(14)间的尺寸与各冷却部翅片(24)间的尺寸相互相同。(It is an object to provide a thermal energy recovery device capable of recovering heat from charge air while avoiding an increase in pressure loss generated in the charge air. A thermal energy recovery device (1) is provided with an evaporation unit (10), an evaporation unit housing unit (18), a cooling unit (20), a cooling unit housing unit (28), an expander (30), a power recovery machine (32), a condenser (34), and a circulation pump (36); the evaporation unit (10) has a working medium heat transfer pipe (12) and a plurality of evaporation unit fins (14); the cooling unit (20) has a cooling medium heat transfer pipe (22) and a plurality of cooling unit fins (24); the cooling part accommodating part (28) is connected with the evaporation part accommodating part (18); the size of the evaporation section housing section (18) in the width direction and the size of the cooling section housing section (28) in the width direction are the same, and the size between the evaporation section fins (14) and the size between the cooling section fins (24) are the same.)

1. A heat energy recovery device is characterized in that,

The disclosed device is provided with:

An evaporation unit that is provided in an air supply line for supplying supercharged air discharged from a supercharger to an engine, and evaporates a working medium by exchanging heat between the supercharged air and the working medium;

An evaporation section housing section for housing the evaporation section so that the pressurized air can thermally contact the evaporation section;

A cooling unit provided in a portion of the air supply line downstream of the evaporation unit, the cooling unit cooling the supercharged air by heat exchange between the supercharged air having passed through the evaporation unit and a cooling medium;

A cooling unit housing portion that houses the cooling unit so that the supercharged air that has passed through the evaporation unit can thermally contact the cooling unit;

an expander that expands the working medium flowing out of the evaporation unit;

A power recovery machine connected to the expander;

A condenser for condensing the working medium flowing out of the expander; and

a circulation pump for feeding the working medium flowing out from the condenser to the evaporation unit;

The evaporation part comprises:

A working medium heat transfer pipe through which the working medium flows;

A plurality of evaporation section fins provided on the working medium heat transfer tube at intervals in a longitudinal direction of the working medium heat transfer tube, and formed in a flat plate shape;

The cooling part comprises:

A cooling medium heat transfer pipe through which the cooling medium flows; and

A plurality of cooling fins that are provided on the cooling medium heat transfer pipe at intervals in a longitudinal direction of the cooling medium heat transfer pipe, and that are formed in a flat plate shape;

The cooling part accommodating part is connected with the evaporation part accommodating part so that the inside of the cooling part accommodating part is communicated with the inside of the evaporation part accommodating part;

A dimension of the evaporation portion housing portion in a width direction which is a direction in which the plurality of evaporation portion fins are arranged is the same as a dimension of the cooling portion housing portion in the width direction;

The size between the evaporation portion fins and the size between the cooling portion fins are the same.

2. the thermal energy recovery device of claim 1,

The working medium heat transfer pipe is arranged in the evaporation portion housing portion in a meandering manner;

Each of the evaporation section fins is formed in a plate shape extending from a tube portion disposed on the most upstream side with respect to the direction in which the supercharged air flows, to a tube portion disposed on the most downstream side, of the working medium heat transfer tubes;

the cooling medium heat transfer pipe is arranged in the cooling unit housing portion in a meandering manner;

Each cooling portion fin is formed in a plate shape extending from a tube portion disposed on the most upstream side with respect to the direction in which the supercharged air flows, to a tube portion disposed on the most downstream side, of the cooling medium heat transfer tubes.

3. The thermal energy recovery device of claim 2,

The number of the evaporation portion fins and the number of the cooling portion fins are the same, and the evaporation portion fins and the cooling portion fins are respectively arranged on the same plane.

4. The thermal energy recovery device of claim 3,

The cooling device further comprises a connecting member for connecting the evaporation part fins and the cooling part fins, which are present on the same plane, of the evaporation part fins and the cooling part fins to each other;

Each of the coupling members has a shape that blocks a flow path from a space between the evaporation portion fins adjacent to each other to a space between the cooling portion fins located on a downstream side of the space with respect to the direction in which the supercharged air flows, from a flow path adjacent to the flow path, and is made of a material having thermal insulation properties.

5. the heat recovery device according to any one of claims 1 to 4,

The evaporation section housing section and the cooling section housing section are integrally formed.

6. the heat recovery device according to any one of claims 2 to 4,

further comprising an adjusting section for adjusting the flow of the cooling medium;

The cooling medium heat transfer pipe includes:

A 1 st cooling pipe through which a part of the cooling medium flows; and

a 2 nd cooling pipe through which the remaining part of the cooling medium flows;

the plurality of cooling section fins include:

A plurality of 1 st cooling fins provided in the 1 st cooling tube; and

a plurality of 2 nd cooling fins provided in the 2 nd cooling tube;

The adjusting unit is set to a 1 st state in which the coolant flows only to the 1 st cooling pipe while the working medium in the evaporation unit exchanges heat with the charge air, and when a stop signal indicating that the heat exchange between the working medium in the evaporation unit and the charge air is stopped is received, the adjusting unit switches from the 1 st state to a 2 nd state in which the coolant flows to both the 1 st cooling pipe and the 2 nd cooling pipe.

7. the thermal energy recovery device of claim 6,

The 2 nd cooling pipe is disposed between pipe portions of the working medium heat transfer pipe which are adjacent to each other with respect to the direction in which the supercharged air flows;

Each 2 nd cooling fin is connected to each evaporation portion fin at a distance from each 1 st cooling fin.

8. A heat energy recovery device is characterized in that,

The disclosed device is provided with:

an evaporation unit that is provided in an air supply line for supplying supercharged air discharged from a supercharger to an engine, and evaporates a working medium by exchanging heat between the supercharged air and the working medium;

An evaporation section housing section for housing the evaporation section so that the pressurized air can thermally contact the evaporation section;

a cooling unit provided in a portion of the air supply line downstream of the evaporation unit, the cooling unit cooling the supercharged air by heat exchange between the supercharged air having passed through the evaporation unit and a cooling medium;

A cooling unit housing portion that houses the cooling unit so that the supercharged air that has passed through the evaporation unit can thermally contact the cooling unit;

An expander that expands the working medium flowing out of the evaporation unit;

A power recovery machine connected to the expander;

A condenser for condensing the working medium flowing out of the expander;

A circulation pump for feeding the working medium flowing out from the condenser to the evaporation unit; and

An adjustment unit that adjusts the flow of the cooling medium;

the cooling part comprises:

A 1 st cooling pipe through which a part of the cooling medium flows; and

A 2 nd cooling pipe through which the remaining part of the cooling medium flows;

the adjusting unit is set to a 1 st state in which the coolant flows only to the 1 st cooling pipe while the working medium in the evaporation unit exchanges heat with the charge air, and when a stop signal indicating that the heat exchange between the working medium in the evaporation unit and the charge air is stopped is received, the adjusting unit switches from the 1 st state to a 2 nd state in which the coolant flows to both the 1 st cooling pipe and the 2 nd cooling pipe.

Technical Field

the present invention relates to a heat energy recovery device.

Background

Conventionally, there is known a thermal energy recovery device that recovers heat of supercharged air supplied from a supercharger to an engine. For example, patent document 1 discloses a ship including an exhaust heat recovery device (thermal energy recovery device) that recovers heat of supercharged air via a working medium. The ship is provided with an engine, a supercharger having a turbine and a compressor, the exhaust heat recovery device, and a gas cooler. The exhaust heat recovery device includes a heater that exchanges heat between the supercharged air and the working medium, an expander that generates power from thermal energy received by the working medium from the supercharged air in the heater, and a generator connected to the expander. The heater is provided in a supply line connecting the compressor with the engine. The gas cooler is provided in a portion of the supply line downstream of the heater, and cools the supercharged air flowing out from the heater.

Disclosure of Invention

problems to be solved by the invention

in the ship described in patent document 1, although the heat of the supercharged air supplied from the supercharger to the engine is efficiently recovered by the exhaust heat recovery device, since the heater is provided on the upstream side of the gas cooler in the intake line, the pressure loss generated in the supercharged air becomes larger than that in the case where the heater is not provided.

an object of the present invention is to provide a thermal energy recovery device capable of recovering heat from charge air while avoiding an increase in pressure loss generated in the charge air.

Means for solving the problems

In order to achieve the above object, a heat recovery device according to the present invention includes: an evaporation unit that is provided in an air supply line for supplying supercharged air discharged from a supercharger to an engine, and evaporates a working medium by exchanging heat between the supercharged air and the working medium; an evaporation section housing section for housing the evaporation section so that the pressurized air can thermally contact the evaporation section; a cooling unit provided in a portion of the air supply line downstream of the evaporation unit, the cooling unit cooling the supercharged air by heat exchange between the supercharged air having passed through the evaporation unit and a cooling medium; a cooling unit housing portion that houses the cooling unit so that the supercharged air that has passed through the evaporation unit can thermally contact the cooling unit; an expander that expands the working medium flowing out of the evaporation unit; a power recovery machine connected to the expander; a condenser for condensing the working medium flowing out of the expander; and a circulation pump for feeding the working medium flowing out of the condenser to the evaporation unit. The evaporation part comprises: a working medium heat transfer pipe through which the working medium flows; and a plurality of evaporation section fins which are provided on the working medium heat transfer tube at intervals in the longitudinal direction of the working medium heat transfer tube, and which are formed in a flat plate shape. The cooling part comprises: a cooling medium heat transfer pipe through which the cooling medium flows; and a plurality of cooling fins which are provided on the cooling medium heat transfer pipe at intervals in the longitudinal direction of the cooling medium heat transfer pipe, and which are formed in a flat plate shape. The cooling part accommodating part is connected with the evaporation part accommodating part so that the inside of the cooling part accommodating part is communicated with the inside of the evaporation part accommodating part; a dimension of the evaporation portion housing portion in a width direction which is a direction in which the plurality of evaporation portion fins are arranged is the same as a dimension of the cooling portion housing portion in the width direction; the size between the evaporation portion fins and the size between the cooling portion fins are the same.

in the present thermal energy recovery device, the inside of the evaporation portion housing portion and the inside of the cooling portion housing portion communicate with each other, the dimensions of the respective housing portions with respect to the width direction are the same, and the dimensions of the respective evaporation portion fins and the dimensions of the respective cooling portion fins are the same with each other, so that the resistance when the supercharged air flows in the respective housing portions is reduced. This makes it possible to avoid an increase in pressure loss occurring in the supercharged air supplied to the engine and to efficiently recover the heat of the supercharged air.

in this case, the working medium heat transfer pipe may be arranged in a serpentine manner in the evaporation portion housing portion. Further, each of the evaporation section fins may be formed in a plate shape extending from a tube portion disposed on the most upstream side with respect to the direction in which the supercharged air flows in the working medium heat transfer tube to a tube portion disposed on the most downstream side. The coolant heat transfer pipe may be arranged in a serpentine manner in the cooling unit housing portion. Further, each of the cooling section fins may be formed in a plate shape extending from a tube portion disposed on the most upstream side with respect to the direction in which the supercharged air flows, to a tube portion disposed on the most downstream side, among the cooling medium heat transfer tubes.

In this solution, the pressure loss generated in the charge air is reduced even more.

further, the number of the evaporation section fins and the number of the cooling section fins may be the same, and the evaporation section fins and the cooling section fins may be provided on the same plane.

If so, the pressure loss generated in the charge air is further reduced.

In the above-described thermal energy recovery device, the heat recovery device may further include a coupling member that couples the evaporation section fins and the cooling section fins, which are present on the same plane, of the evaporation section fins and the cooling section fins to each other. In this case, each of the coupling members may be formed of a material having thermal insulation properties, and may have a shape that blocks a flow path from a space between the evaporation portion fins adjacent to each other to a space between the cooling portion fins located on the downstream side of the space with respect to the direction in which the supercharged air flows, from a flow path adjacent to the flow path.

if so, since one flow path formed between the fins (fin) is blocked from its adjacent flow path, the pressure loss generated in the supercharged air is further reduced. Further, since each of the coupling members is made of a material having thermal insulation properties, it is suppressed that the cooling energy of the cooling medium is transmitted to the working medium flowing in the working medium heat transfer pipe via the cooling portion fin, the coupling member, and the evaporation portion fin, and the working medium is cooled, that is, the amount of power recovery in the power recovery machine is reduced.

The evaporation portion housing portion and the cooling portion housing portion may be integrally formed.

in this case, the work of connecting the two housing portions to each other is omitted.

the thermal energy recovery device may further include an adjustment unit that adjusts the flow of the cooling medium. In this case, the coolant heat transfer pipe may include: a 1 st cooling pipe through which a part of the cooling medium flows; and a 2 nd cooling pipe in which the remaining part of the cooling medium flows. Further, the plurality of cooling portion fins may include: a plurality of 1 st cooling fins provided in the 1 st cooling tube; and a plurality of 2 nd cooling fins provided on the 2 nd cooling tube. Further, the adjusting unit may be configured to set the 1 st state in which the coolant flows only to the 1 st cooling pipe during the heat exchange between the working medium in the evaporating unit and the supercharged air, and to switch from the 1 st state to the 2 nd state in which the coolant flows to both the 1 st cooling pipe and the 2 nd cooling pipe when a stop signal indicating that the heat exchange between the working medium in the evaporating unit and the supercharged air is stopped is received.

In this configuration, during the period of heat exchange between the working medium and the charge air in the evaporator (during steady-state operation), the charge air is efficiently cooled by the working medium flowing through the working medium heat transfer pipe and the cooling medium flowing through the 1 st cooling pipe, and during the stop of the heat exchange (for example, during the stop of the circulation pump), the charge air is efficiently cooled by both the cooling medium flowing through the 1 st cooling pipe and the cooling medium flowing through the 2 nd cooling pipe.

Further, the 2 nd cooling pipe may be disposed between pipe portions of the working medium heat transfer pipe which are adjacent to each other with respect to the direction in which the supercharged air flows. In this case, each 2 nd cooling fin may be connected to each evaporation portion fin at a distance from each 1 st cooling fin.

in this way, the cooling energy of the cooling medium is suppressed from being transmitted to the working medium flowing in the working medium heat transfer tube via the 2 nd cooling fin and the evaporation portion fin during cooling of the supercharged air by the 1 st cooling tube in the steady operation, and the working medium is cooled, that is, the reduction in the amount of power recovery in the power recovery machine is suppressed, and the manufacturing of the evaporation portion fin and the 2 nd cooling fin is simplified.

Further, the heat recovery device according to the present invention includes: an evaporation unit that is provided in an air supply line for supplying supercharged air discharged from a supercharger to an engine, and evaporates a working medium by exchanging heat between the supercharged air and the working medium; an evaporation section housing section for housing the evaporation section so that the pressurized air can thermally contact the evaporation section; a cooling unit provided in a portion of the air supply line downstream of the evaporation unit, the cooling unit cooling the supercharged air by heat exchange between the supercharged air having passed through the evaporation unit and a cooling medium; a cooling unit housing portion that houses the cooling unit so that the supercharged air that has passed through the evaporation unit can thermally contact the cooling unit; an expander that expands the working medium flowing out of the evaporation unit; a power recovery machine connected to the expander; a condenser for condensing the working medium flowing out of the expander; a circulation pump for feeding the working medium flowing out from the condenser to the evaporation unit; and an adjusting section for adjusting the flow of the cooling medium. The cooling part comprises: a 1 st cooling pipe through which a part of the cooling medium flows; and a 2 nd cooling pipe in which the remaining part of the cooling medium flows. The adjusting unit is set to a 1 st state in which the coolant flows only to the 1 st cooling pipe while the working medium in the evaporation unit exchanges heat with the charge air, and when a stop signal indicating that the heat exchange between the working medium in the evaporation unit and the charge air is stopped is received, the adjusting unit switches from the 1 st state to a 2 nd state in which the coolant flows to both the 1 st cooling pipe and the 2 nd cooling pipe.

effects of the invention

as described above, according to the present invention, it is possible to provide a thermal energy recovery device capable of recovering heat from the supercharged air while avoiding an increase in pressure loss generated in the supercharged air.

Drawings

Fig. 1 is a view schematically showing the structure of a thermal energy recovery apparatus according to embodiment 1 of the present invention.

Fig. 2 is a view schematically showing a modification of the evaporation unit and the cooling unit of the thermal energy recovery device according to embodiment 1.

fig. 3 is a view schematically showing a modification of the evaporation unit and the cooling unit of the thermal energy recovery device according to embodiment 1.

Fig. 4 is a view schematically showing the structure of the thermal energy recovery apparatus according to embodiment 2 of the present invention.

fig. 5 is a flowchart showing the control content of the adjusting unit.

Fig. 6 is a view schematically showing a modification of the evaporation unit and the cooling unit of the thermal energy recovery device according to embodiment 2.

Fig. 7 is a view showing an example of a cross section of the evaporation unit and the cooling unit shown in fig. 6.

Detailed Description

hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(embodiment 1)

A thermal energy recovery apparatus 1 according to embodiment 1 of the present invention will be described with reference to fig. 1. The thermal energy recovery device 1 is a device that generates power by recovering heat from the supercharged air supplied to the engine 2. In the present embodiment, the thermal energy recovery apparatus 1 is mounted on a ship having an engine 2 and a supercharger 3. The supercharger 3 has: a turbine 4 driven by exhaust gas discharged from the engine 2; and a compressor 5 connected to the turbine 4 and discharging the supercharged air for supply to the engine 2. The supercharged air discharged from the compressor 5 is supplied to the engine 2 through an air supply line L1 connecting the compressor 5 and the engine 2. The exhaust gas discharged from the engine 2 is supplied to the turbine 4 through an exhaust line L2 connecting the engine 2 and the turbine 4.

As shown in fig. 1, the thermal energy recovery device 1 includes an evaporation unit 10, an evaporation unit housing portion 18, a cooling unit 20, a cooling unit housing portion 28, an expander 30, a power recovery unit 32, a condenser 34, a circulation pump 36, and a circulation flow path 38. The circulation flow path 38 connects the evaporation unit 10, the expander 30, the condenser 34, and the circulation pump 36 in this order.

The evaporation portion 10 is provided in the air supply line L1. The evaporation unit 10 evaporates the working medium (R245 fa, etc.) by exchanging heat between the supercharged air discharged from the compressor 5 and the working medium. Details of the evaporation unit 10 will be described later.

The evaporation portion housing portion 18 houses the evaporation portion 10 so that the pressurized air can thermally contact the evaporation portion 10. Specifically, the evaporation section housing section 18 forms a flow path of the pressurized air.

The expander 30 is provided in a portion of the circulation flow path 38 on the downstream side of the evaporation unit 10. The expander 30 expands the gaseous working medium flowing out of the evaporation unit 10. In the present embodiment, a positive displacement screw expander having a rotor rotationally driven by expansion energy of a gas-phase working medium is used as the expander 30.

the power recovery machine 32 is connected to the expander 30. The power recovery unit 32 recovers power from the working medium by rotating with the driving of the expander 30. In the present embodiment, a generator is used as the power recovery machine 32. Further, a compressor or the like may be used as the power recovery machine 32.

the condenser 34 is provided in a portion of the circulation flow path 38 on the downstream side of the expander 30. The condenser 34 condenses the working medium (seawater or the like) by exchanging heat between the working medium flowing out of the expander 30 and the cooling medium.

the circulation pump 36 is provided in a portion of the circulation flow path 38 on the downstream side of the condenser 34 (a portion between the condenser 34 and the evaporation unit 10). The circulation pump 36 conveys the liquid-phase working medium flowing out of the condenser 34 to the evaporation unit 10.

here, the evaporation unit 10 will be described in detail. The evaporation unit 10 includes a working medium heat transfer tube 12 through which a working medium flows, and a plurality of evaporation unit fins 14 provided on the working medium heat transfer tube 12.

the working medium heat transfer tube 12 is arranged in a serpentine manner in the evaporator housing portion 18. Specifically, the working medium heat transfer pipe 12 has a plurality of pipe portions each having a linearly extending shape and a bent portion connecting end portions of the pipe portions to each other, and is disposed in the evaporation portion housing portion 18 such that the pipe portions are arranged in a direction (a direction in which the supercharged air flows) orthogonal to an axial direction of the pipe portions.

each evaporation fin 14 is formed in a flat plate shape. The evaporation fin 14 is provided in the tube portion of the working medium heat transfer tube 12 at a distance from each other in the longitudinal direction of the tube portion. Specifically, the evaporation portion fins 14 are provided on the tube portions such that the dimension P1 between the adjacent evaporation portion fins 14 is equal. In the present embodiment, each evaporation section fin 14 is formed in a plate shape extending from the tube portion 12u disposed on the most upstream side with respect to the direction in which the supercharged air flows (the direction orthogonal to the axial direction of the tube portions) to the tube portion 12d disposed on the most downstream side in the working medium heat transfer tube 12.

The cooling portion 20 is provided in a portion of the air supply line L1 on the downstream side of the evaporation portion 10. The cooling unit 20 cools the supercharged air by exchanging heat between the supercharged air having passed through the evaporation unit 10 and a cooling medium (such as seawater). Specifically, the cooling unit 20 includes a cooling medium heat transfer pipe 22 through which a cooling medium flows, and a plurality of cooling unit fins 24 provided on the cooling medium heat transfer pipe 22.

the cooling unit housing portion 28 houses the cooling unit 20 so that the charge air can thermally contact the cooling unit 20. Specifically, the cooling unit housing portion 28 forms a flow path of the supercharged air. The cooling portion housing portion 28 is connected to the evaporation portion housing portion 18 such that the inside of the cooling portion housing portion 28 and the inside of the evaporation portion housing portion 18 communicate with each other. In the present embodiment, the evaporation portion housing portion 18 and the cooling portion housing portion 28 are connected by flanges. The size of the evaporation portion housing portion 18 in the width direction (the direction in which the plurality of evaporation portion fins 14 are arranged) and the size of the cooling portion housing portion 28 in the width direction are the same.

The coolant heat transfer tubes 22 are arranged in a serpentine manner in the cooling unit housing portion 28. Specifically, the coolant heat transfer pipe 22 has a plurality of pipe portions each having a linearly extending shape and bent portions each connecting end portions of the pipe portions, and is disposed in the cooling portion housing portion 28 such that the pipe portions are aligned in a direction (a direction in which the supercharged air flows) orthogonal to the axial direction of the pipe portions. The coolant is supplied to the coolant heat transfer pipe 22 by a coolant pump 23 provided in a coolant supply flow path connected to the coolant heat transfer pipe 22.

each cooling portion fin 24 is formed in a flat plate shape. The cooling fin 24 is provided in the tube portion of the coolant heat transfer tube 22 at a distance from each other in the longitudinal direction of the tube portion. Specifically, the cooling section fins 24 are provided on the tube portions such that the dimension P2 between the adjacent cooling section fins 24 is equal to the dimension P1 between the evaporation section fins 14. In the present embodiment, each cooling section fin 24 is formed in a plate shape extending from the tube portion 22u disposed on the most upstream side with respect to the direction in which the supercharged air flows (the direction orthogonal to the axial direction of the tube portions) to the tube portion 22d disposed on the most downstream side in the cooling medium heat transfer tube 22. The cooling section fins 24 are arranged so as to be located on the same plane as the evaporation section fins 14. The number of the cooling portion fins 24 is set to be the same as the number of the evaporation portion fins 14.

As described above, in the thermal energy recovery device 1 of the present embodiment, the inside of the evaporation portion housing portion 18 and the inside of the cooling portion housing portion 28 communicate with each other, the dimensions of the housing portions 18 and 28 in the width direction are the same, and the dimension P1 between the evaporation portion fins 14 and the dimension P2 between the cooling portion fins 24 are the same, so that the resistance when the supercharged air flows in the housing portions 18 and 28 is reduced. This makes it possible to avoid an increase in pressure loss occurring in the supercharged air supplied to the engine 2 and to efficiently recover the heat of the supercharged air at the same time.

Further, since the evaporation portion fins 14 and the cooling portion fins 24 are formed in a plate shape, the pressure loss generated in the supercharged air is further reduced.

furthermore, since the evaporation portion fins 14 and the cooling portion fins 24 are provided on the same plane, respectively, the pressure loss generated in the supercharged air is further reduced.

As shown in fig. 2, the thermal energy recovery apparatus 1 may further include a plurality of coupling members 15. The respective coupling members 15 couple the evaporation portion fins 14 and the cooling portion fins 24, which are present on the same plane, of the evaporation portion fins 14 and the cooling portion fins 24 to each other. Each of the coupling members 15 has a shape that blocks a flow path from a space between the evaporation portion fins 14 adjacent to each other to a space between the cooling portion fins 24 located on the downstream side of the space with respect to the direction in which the supercharged air flows, from the flow path adjacent to the flow path, and is made of a material having thermal insulation properties (ceramic or the like). In this embodiment, one flow path formed between the fins 14 and 24 is blocked from the adjacent flow path, and therefore, the pressure loss generated in the supercharged air is further reduced. Further, since each of the coupling members 15 is made of a material having thermal insulation properties, it is suppressed that cooling energy of the cooling medium flowing through the cooling medium heat transfer tubes 22 is transmitted to the working medium flowing through the working medium heat transfer tubes 12 via the cooling portion fins 24, the coupling members 15, and the evaporation portion fins 14 to cool the working medium, that is, the amount of power recovery in the power recovery machine 32 is suppressed from decreasing.

Alternatively, as shown in fig. 3, the evaporation section fins 14 and the cooling section fins 24 may not be plate-shaped but may be shaped so as to be spaced apart from the fins 14 and 24 provided on the tube portions adjacent to the tube portions on which the fins 14 and 24 are provided.

As shown in fig. 2 and 3, the evaporation portion housing portion 18 and the cooling portion housing portion 28 may be formed integrally (as a single case). In this embodiment, the work of connecting the two housing portions 18 and 28 to each other is omitted.

(embodiment 2)

Next, the thermal energy recovery device 1 according to embodiment 2 of the present invention will be described with reference to fig. 4 and 5. In embodiment 2, only the portions different from embodiment 1 will be described, and the description of the same structure, operation, and effects as those of embodiment 1 will be omitted.

In the present embodiment, the coolant heat exchanger tube 22 has two flow paths, and the flow rate of the coolant flowing through each flow path can be adjusted. Specifically, the coolant heat transfer pipe 22 includes a 1 st cooling pipe 22a through which a part of the coolant flows and a 2 nd cooling pipe 22b through which the remaining part of the coolant flows. The cooling medium is supplied to the 1 st cooling pipe 22a by a 1 st pump 23a provided in a 1 st cooling medium supply passage connected to the 1 st cooling pipe 22 a. The 2 nd cooling pipe 22b is supplied with the cooling medium by a 2 nd pump 23b provided in a 2 nd cooling medium supply passage connected to the 2 nd cooling pipe 22 b.

Each cooling fin 24 includes a 1 st cooling fin 24a provided in the 1 st cooling tube 22a and a 2 nd cooling fin 24b provided in the 2 nd cooling tube 22 b. The 2 nd cooling fins 24b are connected to the evaporation portion fins 14 at intervals from the 1 st cooling fins 24 a.

The thermal energy recovery device 1 of the present embodiment further includes an adjustment unit 40 that adjusts the flow of the cooling medium flowing through the cooling pipes 22a and 22 b. The adjusting unit 40 is set to a 1 st state in which the coolant flows only to the 1 st cooling pipe 22a during a period in which heat exchange between the working medium and the supercharged air in the evaporation unit 10 is performed (during steady-state operation), and when a stop signal (for example, a signal to stop the circulation pump 36) indicating that heat exchange between the working medium and the supercharged air in the evaporation unit 10 is stopped is received, switches from the 1 st state to a 2 nd state in which the coolant flows to both the 1 st cooling pipe 22a and the 2 nd cooling pipe 22 b. In the present embodiment, the adjusting unit 40 drives only the 1 st pump 23a (stops the 2 nd pump 23 b) during the steady operation, and drives the 2 nd pump 23b when receiving the stop signal.

hereinafter, the control content by the adjusting unit 40 will be described with reference to fig. 5.

First, the adjusting unit 40 determines whether the engine 2 is being driven (step ST 11). As a result, when the engine 2 is not being driven, it is determined again whether the engine 2 is being driven, and when the engine 2 is being driven, the circulation pump 36, the 1 ST pump 23a, and the 2 nd pump 23b are driven (step ST 12). This starts the cooling of the supercharged air by the working medium and the cooling medium, and starts the recovery of the motive power in the motive power recovery machine 32.

next, the adjusting unit 40 determines whether or not the steady-state operation state is achieved (for example, whether or not the amount of power recovered by the power recovery machine 32 is stable) (step ST 13). If the steady-state operation state is not obtained as a result, the routine returns to step ST11 again, whereas if the steady-state operation state is obtained, the adjustment unit 40 stops (sets the 1 ST state) the 2 nd pump 23b (step ST 13). This cools the charge air only by the working medium flowing through the working medium heat transfer pipe 12 and the cooling medium flowing through the 1 st cooling pipe 22 a. In addition, since the supercharged air is sufficiently cooled in the evaporation portion 10, the temperature of the supercharged air supplied to the engine 2 is sufficiently lowered even if the 2 nd pump 23b is stopped.

Then, the adjustment section 40 determines whether or not the stop signal is received (step ST 15). As a result, if the stop signal is not received, it is determined again whether or not the stop signal is received, and if the stop signal is received, the circulation pump 36 is stopped and the 2 nd pump 23b is driven (switched to the 2 nd state) (step ST 16). Thereby, the charge air is cooled only by the cooling medium flowing through the 1 st cooling pipe 22a and the cooling medium flowing through the 2 nd cooling pipe 22 b.

As described above, in the thermal energy recovery device 1 of the present embodiment, during the period in which the heat exchange between the working medium and the supercharged air is performed in the evaporation unit 10 (during steady-state operation), the supercharged air is efficiently cooled by the working medium flowing through the working medium heat-transfer pipe 12 and the cooling medium flowing through the 1 st cooling pipe 22a, and during the stop of the heat exchange (for example, during the stop of the circulation pump), the supercharged air is efficiently cooled by both the cooling medium flowing through the 1 st cooling pipe 22a and the cooling medium flowing through the 2 nd cooling pipe 22 b.

further, since the 2 nd cooling fins 24b are connected to the evaporation portion fins 14 at intervals apart from the 1 st cooling fins 24a, in the cooling of the supercharged air by the 1 st cooling tubes 22a in the steady operation, the cooling energy of the cooling medium is transmitted to the working medium flowing in the working medium heat transfer tubes 12 via the 2 nd cooling fins 24b and the evaporation portion fins 14, and the working medium is thereby suppressed from being cooled, that is, the amount of power recovery in the power recovery machine 32 is suppressed from being reduced, and the manufacturing of the evaporation portion fins 14 and the 2 nd cooling fins 24b is simplified.

As shown in fig. 6 and 7, the 2 nd cooling tube 22b may be assembled between the tube portions of the working medium heat exchanger tube 12. In this case, a part of the evaporation portion fin 14 constitutes the 2 nd cooling fin 24 b. Fig. 7 shows an example of the arrangement of the working medium heat transfer tubes 12 and the 2 nd cooling tubes 22 b.

as shown in fig. 6, the 2 nd cooling pipe 22b may be branched from the 1 st cooling pipe 22 a. In this case, the adjusting portion 40 switches the 1 st state and the 2 nd state by switching the opening and closing of the on-off valve V provided in the 2 nd cooling pipe 22 b.

The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the claims rather than the description of the above embodiments, and includes all modifications equivalent in meaning and scope to the claims.

For example, the number of the evaporation portion fins 14 and the number of the cooling portion fins 24 may be different from each other.

In embodiment 2, the 2 nd cooling fin 24b may be connected to the 1 st cooling fin 24a at a distance from the evaporation portion fin 14.

Description of the reference numerals

1 Heat energy recovery device

2 engines

3 pressure booster

4 turbine

5 compressor

10 evaporation part

12 working medium heat transfer pipe

12u tube part

12d pipe part

14 evaporation part fin

18 evaporation part housing part

20 cooling part

22 heat transfer tube for cooling medium

22a 1 st cooling tube

22b 2 nd cooling pipe

22u tube part

22d pipe part

24 cooling part fin

24a 1 st Cooling Fin

24b 2 nd cooling fin

28 cooling part housing part

30 expander

32 power recovery machine

34 condenser

36 circulating pump

38 circulation flow path

40 an adjusting part.