阅读说明：本技术 一种利用热能发电和储能协同为船舶照明供电的方法 (Method for supplying power for ship lighting by utilizing cooperation of heat energy power generation and energy storage ) 是由 孙超 朱志宇 于 2021-07-19 设计创作，主要内容包括：一种利用热能发电和储能协同为船舶照明供电的方法,实现船舶机舱内余热的收集利用和提高蓄电池的工作时间和寿命。包括：使用热管余热回收系统收集船舶机舱内的热能；使用螺杆膨胀动力机发电热力系统实现热能到电能的转换；使用控制模块一选择电流通过的支路；对于支路一,电流经稳压器、逆变器、控制模块二后有选择性的对一定数量的LED供电；对于支路二,蓄电池经控制模块三后对剩余数量的LED供电。该系统能够收集利用船舶机舱内热能,同时减少船舶机舱内的排热设备的花费使用,可以简单、有效地实现对热的处理和再利用；同时优化了蓄电池的工作质量。(A method for supplying power to ship illumination by utilizing heat energy to generate power and store energy cooperatively realizes the collection and utilization of waste heat in a ship engine room and improves the working time and the service life of a storage battery. The method comprises the following steps: collecting heat energy in a ship engine room by using a heat pipe waste heat recovery system; the screw expansion power machine is used for generating electricity and a thermodynamic system to realize the conversion from heat energy to electric energy; selecting a branch through which current passes by using a control module I; for the first branch, the current selectively supplies power to a certain number of LEDs after passing through the voltage stabilizer, the inverter and the second control module; and for the branch II, the storage battery supplies power to the rest number of LEDs after passing through the control module III. The system can collect and utilize heat energy in the ship engine room, simultaneously reduces the cost of heat extraction equipment in the ship engine room, and can simply and effectively realize heat treatment and reutilization; and simultaneously, the working quality of the storage battery is optimized.)

1. A method for supplying power for ship illumination by utilizing cooperation of thermal energy power generation and energy storage is characterized in that: the method comprises the following steps:

step 1, installing and using a heat pipe waste heat recovery system to collect heat energy in a ship engine room;

step 2, a screw expansion power machine power generation thermodynamic system is used for converting heat energy into electric energy, and the generated current is connected to a first control module;

step 3, the control module I enables the voltage to be in the voltage stabilizing range U of the voltage stabilizer_minAnd U_maxIn connection with itThe alternating current is input into a branch I where the voltage stabilizer is positioned, and the control module I controls the voltage to be smaller than U_minThe current of the battery is input into a second branch circuit where the battery is located;

step 4, the current in the branch I passes through a voltage stabilizer and a rectifier and then is connected to a control module II;

step 5, the control module II controls the closing of an isolating switch connected with the branch I and the LED lamp;

step 6, inputting the current in the branch II into a storage battery after passing through a rectifier, and connecting the current output by the storage battery into a control module III;

and 7, except the LED lamp corresponding to the isolating switch which is controlled to be closed by the control module II, the remaining LED lamps and the isolating switches between the branch circuits II are controlled to be closed by the control module III.

2. The method for supplying power for ship lighting by using thermal energy to generate power and store energy in cooperation as claimed in claim 1, wherein: in the step 1, the heat pipe waste heat recovery system is arranged in a cabin.

3. The method for supplying power for ship lighting by using thermal energy to generate power and store energy in cooperation as claimed in claim 1, wherein: in step 1, a barrier of thermal insulation material is added to the hold to reduce the loss of thermal energy.

4. The method for supplying power for ship lighting by using thermal energy to generate power and store energy in cooperation as claimed in claim 1, wherein: in step 3, the voltage stabilizing range of the voltage stabilizer is determined by firstly obtaining the maximum possible output voltage U of the screw expansion power machine power generation thermodynamic system₁Size; finding the maximum heat energy Q₁The maximum output voltage U of the screw expansion power machine power generation thermodynamic system corresponding to the time can be obtained₁(ii) a Heat energy Q in ship engine room₀Output voltage U of thermal power system for generating power by screw expansion power machine₀Positive correlation in magnitude, while Q₀Is equal to the running power P of the machine in the engine room of the ship₀Having a positive correlation, i.e. looking forPower P to the maximum operating power of the machine in the engine room of the ship₁The maximum output voltage U of the screw expansion power machine power generation thermodynamic system corresponding to the time can be obtained₁。

5. The method for supplying power for ship lighting by using thermal energy to generate power and store energy cooperatively according to claim 4, wherein: in step 3, the maximum time power P of the machine operation power in the ship engine room₁The maximum output voltage U of the screw expansion power machine power generation thermodynamic system corresponding to the time can be obtained₁Firstly, obtaining a functional relation between the heat energy in the ship engine room and the operation power of the machine in the ship engine room through experimental measurement, further obtaining a functional relation between the heat energy in the ship engine room and the output voltage of the power generation thermodynamic system, and then obtaining the maximum operation power P of the machine in the ship engine room₁Corresponding maximum output voltage U of power generation thermodynamic system₁The numerical value of (c).

6. The method for supplying power for ship lighting by using thermal energy to generate power and store energy in cooperation as claimed in claim 1, wherein: in step 3, for the voltage stabilizing range U of the voltage stabilizer_minAnd U_maxNumerical value of (1), requirement U_max≥U₁Output voltage U of simultaneous voltage stabilizer_nEqual to the rated output voltage of the battery, U_nKeeping constant, and finally obtaining U according to the specification of the voltage stabilizer_minThe numerical value of (c).

7. The method for supplying power for ship lighting by using thermal energy to generate power and store energy in cooperation as claimed in claim 1, wherein: in step 3, the first control module is provided with a voltage measuring device, and the voltage measuring device obtains the output voltage U of the screw expansion power machine power generation thermodynamic system_aComparison module compares U_aAnd U_minSize of (1), if U_a≤U_minThe first control module enables the output current of the energy converter to be input into a second branch where the storage battery is located, and if U is not located_a＞U_minAnd U is_a≤U_maxThe output voltage of the screw expansion power machine power generation thermodynamic system is within the voltage stabilizing range U of the voltage stabilizer_minAnd U_maxAnd the first control module inputs the output current of the power generation thermodynamic system of the screw expansion power machine into the first branch where the voltage stabilizer is located.

8. The method for supplying power for ship lighting by using thermal energy to generate power and store energy in cooperation as claimed in claim 1, wherein: in step 5, the control module II is provided with a current measuring device which obtains the current I input to the branch I₁Rated current of each LED lamp is I_nAccording to INT (I)₁÷I_n) Calculating to obtain the current I on the first branch₁And supplying the maximum number M of the LED lamps, and then controlling the closing of M groups of isolating switches connected with the branch I and the LED lamps by the control module.

9. The method for supplying power for ship lighting by using thermal energy to generate power and store energy in cooperation as claimed in claim 1, wherein: in steps 5 and 7, an isolating switch is connected between each LED lamp and the branch circuit I and the branch circuit II, and the isolating switch is normally in an on-off state.

10. The method for supplying power for ship lighting by using thermal energy to generate and store energy in cooperation as claimed in claim 9, wherein: the isolating switch connected between the I number LED lamp and the first branch circuit is marked as S_iThe disconnecting switch connected to the second branch is denoted S_i' there is a logical connection between the third control module and the second control module, if the control module is two pairs of isolating switches S_iIf the closing control is not carried out, the control module III can carry out the closing control on the corresponding isolating switch S_i' closing control is carried out, if the control module closes M groups of isolating switches, the corresponding isolating switch is S₁ S₂......S_mThe third control module will close the (N-M) groups of isolating switches, the corresponding isolating switch is S_m+1’S_m+2’......S_n’。

Technical Field

The invention belongs to the field of new energy power generation, and particularly relates to a method for supplying power for ship illumination by utilizing cooperation of thermal energy power generation and energy storage.

Background

The Zeebeck effect, when the material both ends produced the difference in temperature, more hole can be formed to the material hot junction, based on hole concentration difference, the carrier moved to the cold junction and piles up here to form stable thermoelectric electromotive force V at cold and hot both ends.

In the heat pump technology, heat is transferred from a high-temperature object to a low-temperature object, and the heat pump can transfer heat energy in the low-temperature object into the high-temperature object, and then the high-temperature object is used for heating water or heating. The waste heat recovery technology is to transfer the heat of a low-temperature heat source to a high-temperature heat source by driving a heat pump.

In the heat pipe technology, hot fluid passes through the lower part of a heat pipe, cold fluid passes through the upper part of the heat pipe, and the hot fluid and the cold fluid are separated by a partition plate or a heat insulating material in the middle. At this point, the inside of the heat pipe will begin the phase change heat transfer process. The working medium in the heating section absorbs latent heat of vaporization and is boiled or evaporated, and liquid is changed into steam. Under the action of a certain pressure difference in the pipe, the generated steam flows to the cooling section, and when the steam meets a cold wall surface, latent heat of vaporization is released at the same time and is transferred to an external cold source through the pipe wall. The condensed liquid is helped to flow back to the heating section by gravity, the evaporation and heat absorption process is restarted, and the continuous transfer of heat is completed through the continuous phase change of the medium in the tube.

The voltage stabilizer can output the current with voltage change in a certain range into the current with constant voltage, and the influence caused by voltage fluctuation in a dual-power network is reduced to a great extent, so that thermal power generation can be directly applied to the power network to a certain extent, and the loss caused by the current input and output storage battery is reduced.

Disclosure of Invention

The invention provides a method for supplying power for ship illumination by utilizing the cooperation of heat energy power generation and energy storage, which utilizes the cooperation of heat energy power generation in a ship engine room and the power generation of a ship energy storage battery to supply power for the ship illumination, so as to solve the problems of waste heat treatment and reutilization in the existing ship engine room and ensure that heat generated by equipment in the engine room during working is treated, thereby ensuring that the equipment and workers work in a non-high-temperature environment, simultaneously, the heat energy power generation also charges the storage battery, and the working time of the storage battery is prolonged; the heat energy power generation and the storage battery power generation simultaneously supply power for the lighting system, so that the load of the storage battery is reduced, and the service life of the storage battery is prolonged: the low-voltage current of heat energy power generation output inserts the battery as reserve, and the constant voltage current of output through the stabiliser directly links the equipment and uses, compares in all inserting the battery with the electric current of arbitrary size, has reduced the loss of battery charging power consumption, has improved the use power of electric energy.

A method for cooperatively supplying power for ship lighting by utilizing thermal energy power generation and energy storage comprises the following steps:

step 1, installing and using a heat pipe waste heat recovery system to collect heat energy in a ship engine room;

step 2, a screw expansion power machine power generation thermodynamic system is used for converting heat energy into electric energy, and the generated current is connected to a first control module;

step 3, the control module I enables the voltage to be in the voltage stabilizing range U of the voltage stabilizer_minAnd U_maxThe current between the first and second branch circuits is input into a first branch circuit where the voltage stabilizer is located, and the first control module outputs a voltage smaller than U_minThe current of the battery is input into a second branch circuit where the battery is located;

step 4, the current in the branch I passes through a voltage stabilizer and a rectifier and then is connected to a control module II;

step 5, the control module II controls the closing of an isolating switch connected with the branch I and the LED lamp;

step 6, inputting the current in the branch II into a storage battery after passing through a rectifier, and connecting the current output by the storage battery into a control module III;

and 7, except the LED lamp corresponding to the isolating switch which is controlled to be closed by the control module II, the remaining LED lamps and the isolating switches between the branch circuits II are controlled to be closed by the control module III.

Further, in step 1, the heat pipe waste heat recovery system is arranged in the cabin.

Further, in step 1, the hold is provided with a barrier of insulating material to reduce the loss of heat energy.

Further, in step 3, the voltage stabilizing range of the voltage stabilizer is determined by firstly obtaining the maximum possible output voltage U of the screw expansion power machine power generation thermodynamic system₁Size; finding the maximum heat energy Q₁The maximum output voltage U of the screw expansion power machine power generation thermodynamic system corresponding to the time can be obtained₁(ii) a Internal heat of ship engine roomCan Q₀Output voltage U of thermal power system for generating power by screw expansion power machine₀Positive correlation in magnitude, while Q₀Is equal to the running power P of the machine in the engine room of the ship₀Having positive correlation variation relation, i.e. finding the maximum power P of the machine running power in the ship cabin₁The maximum output voltage U of the screw expansion power machine power generation thermodynamic system corresponding to the time can be obtained₁。

Further, in step 3, the maximum power P is provided for the machine operation power in the ship cabin₁The maximum output voltage U of the screw expansion power machine power generation thermodynamic system corresponding to the time can be obtained₁Firstly, obtaining a functional relation between the heat energy in the ship engine room and the operation power of the machine in the ship engine room through experimental measurement, further obtaining a functional relation between the heat energy in the ship engine room and the output voltage of the power generation thermodynamic system, and then obtaining the maximum operation power P of the machine in the ship engine room₁Corresponding maximum output voltage U of power generation thermodynamic system₁The numerical value of (c).

Further, in step 3, for the voltage stabilization range U of the voltage stabilizer_minAnd U_maxNumerical value of (1), requirement U_max≥U₁Output voltage U of simultaneous voltage stabilizer_nEqual to the rated output voltage of the battery, U_nKeeping constant, and finally obtaining U according to the specification of the voltage stabilizer_minThe numerical value of (c).

Further, in step 3, the first control module is provided with a voltage measuring device, and the voltage measuring device obtains the output voltage U of the screw expansion power machine power generation thermodynamic system_aComparison module compares U_aAnd U_minSize of (1), if U_a≤U_minThe first control module enables the output current of the energy converter to be input into a second branch where the storage battery is located, and if U is not located_a＞U_minAnd U is_a≤U_maxThe output voltage of the screw expansion power machine power generation thermodynamic system is within the voltage stabilizing range U of the voltage stabilizer_minAnd U_maxThe first control module inputs the output current of the power generation thermodynamic system of the screw expansion power machine to the voltage stabilizerIn branch one of (1).

Further, in step 5, the control module II is provided with a current measuring device, and the current measuring device obtains the current I input to the branch I₁Rated current of each LED lamp is I_nAccording to INT (I)₁÷I_n) Calculating to obtain the current I on the first branch₁And supplying the maximum number M of the LED lamps, and then controlling the closing of M groups of isolating switches connected with the branch I and the LED lamps by the control module.

Further, in steps 5 and 7, a disconnecting switch is connected between each LED lamp and the branch circuit a and the branch circuit b, respectively, and usually the disconnecting switch is in an on-off state.

Further, the isolating switch connected between the I-type LED lamp and the first branch circuit is marked as S_iThe disconnecting switch connected to the second branch is denoted S_i' there is a logical connection between the third control module and the second control module, if the control module is two pairs of isolating switches S_iIf the closing control is not carried out, the control module III can carry out the closing control on the corresponding isolating switch S_i' closing control is carried out, if the control module closes M groups of isolating switches, the corresponding isolating switch is S₁ S₂......S_mThe third control module will close the (N-M) groups of isolating switches, the corresponding isolating switch is S_m+1’S_m+2’......S_n’。

The invention achieves the following beneficial effects:

1. the waste heat generated by the operation of the machine in the engine room of the ship is utilized to realize power generation, and waste materials are well changed into valuable materials.

2. The waste heat generated in the ship engine room is utilized to realize thermoelectric conversion, so that the problem of high temperature in the ship engine room is well solved, and the investment of heat extraction equipment is reduced.

3. The heat energy power generation and the storage battery power generation are cooperated to supply power for ship illumination, the working load of the storage battery is reduced, and meanwhile, the storage battery can be charged in a certain range through the heat energy power generation, so that the power supply is more flexible and efficient.

4. Constant voltage current directly links the load and uses and low-voltage current access battery uses, compares in all insert the battery with the electric current of arbitrary size for reserve in, has reduced the loss of battery charging power consumption, has improved the service power of electric energy.

5. When the current output by the power generation thermodynamic system flows into the first branch, the output current of the first branch and the storage battery in the second branch supply power to the load in a cooperative manner, and the output voltage of the current in the first branch is the same as the output current voltage of the storage battery in the second branch through the voltage stabilizer; when the current output by the energy converter flows into the second branch, the storage battery in the second branch supplies power to the load, and the current and the voltage output by the storage battery are stable, so that the system for cooperatively supplying power by thermal power generation and storage battery power generation eliminates the influence caused by voltage fluctuation existing in dual-power supply to a great extent, and improves the power supply quality of the thermal power generation directly used in a power supply system.

Drawings

FIG. 1 is a schematic illustration of the Zeebeck experiment in an embodiment of the present invention.

Fig. 2 is a schematic diagram of a typical heat pipe waste heat recovery system according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of an energy conversion process of a thermoelectric conversion element according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of a screw expansion power machine power generation thermodynamic system in an embodiment of the invention.

Fig. 5 is a block diagram of a system for supplying power to ship lighting by using thermal power generation and storage battery cooperation in an embodiment of the invention.

Fig. 6 is a schematic operation diagram of a system for supplying power cooperatively by thermal power generation and battery power generation in the embodiment of the invention.

FIG. 7 is a flowchart illustrating operation of the control module according to an embodiment of the present invention.

Fig. 8 is a flowchart illustrating operation of the second control module according to the embodiment of the present invention.

Fig. 9 is a flowchart illustrating the operation of the control module three in the embodiment of the present invention.

Detailed Description

The thermoelectric conversion method is suitable for a Rankine cycle waste heat recovery system based on the combination of heat pipes, and is a method for supplying power for ship illumination by utilizing the cooperation of thermal power generation and storage battery power generation of a large ship. Referring to the schematic view of the zeebeck effect in fig. 1 and the schematic view of the closed rankine cycle in fig. 2, it can be seen that the heat energy existing in the cabin of the ship can be recovered and utilized for generating electricity.

Based on the above, the embodiment of the invention provides a method for supplying power for ship illumination by using cooperation of thermal energy power generation in a ship engine room and ship energy storage battery power generation, which comprises the following steps:

firstly, a heat insulation barrier of heat insulation materials is additionally arranged on the inner wall of a ship cabin, so that the loss of heat energy is reduced, and a heat pipe waste heat recovery system and a screw expansion power machine power generation thermodynamic system are arranged in the ship cabin.

In the embodiment of the invention, seawater is used as a stable cold end in the Rankine cycle, and the conversion from heat energy to electric energy is realized through the Zeebeck effect; the closed Rankine cycle waste heat recovery system combined with the heat pipe is used for collecting heat energy in the ship engine room, the screw expansion power machine power generation thermodynamic system is used for transducing the heat energy in the ship engine room, and the purposes of power supply and power storage of thermoelectric conversion are achieved by using the heat energy in the ship engine room; determining the trend of the output current of the power generation thermodynamic system by using the first control module; processing the current in the first branch by using a voltage stabilizer and a rectifier to ensure that the output current of the first branch is direct current with the voltage equal to the rated output voltage of the storage battery; and carrying out load distribution on the first branch and the second branch by using the second control module and the third control module.

The voltage stabilizing range of the voltage stabilizer is determined by firstly obtaining the maximum possible output voltage U of the screw expansion power machine power generation thermodynamic system₁Size; measuring the heat energy of the ship cabin in one week by using a heat energy measuring device, predicting the heat energy of the ship cabin in one year, and finding out the heat energy Q when the heat energy is maximum₁Then the maximum output voltage U of the screw expansion power machine power generation thermodynamic system corresponding to the time is obtained₁(ii) a Heat energy Q in ship engine room₀Output voltage U of thermal power system for generating power by screw expansion power machine₀Positive correlation in magnitude, while Q₀Is equal to the running power P of the machine in the engine room of the ship₀Has a positive correlation variation relationship with the other end of the film,namely, the maximum time power P of the running power of the machine in the engine room of the ship is found₁The maximum output voltage U of the screw expansion power machine power generation thermodynamic system corresponding to the time can be obtained₁。

Determining a voltage regulation range U of a voltage regulator_minAnd U_maxNumerical value of (1), requirement U_max≥U₁Output voltage U of simultaneous voltage stabilizer_nObtaining U according to the specification of the voltage stabilizer for the constant rated output voltage of the storage battery_minThe numerical value of (c).

When the voltage measuring device bound on the control module I displays that the energy value of the output voltage of the screw expansion power machine power generation thermodynamic system is larger than U_minWhen the control module I controls the closing of an isolating switch between the screw expansion power machine power generation thermodynamic system and the branch I, and the isolating switch between the screw expansion power machine power generation thermodynamic system and the branch II keeps an on-off state, namely the isolating switch is switched to the position of a contact point a in the graph 6; the output current of the screw expansion power machine power generation thermodynamic system passes through the voltage stabilizer and the rectifier on the first branch to generate the voltage and the rated output voltage U of the storage battery_nEqual magnitude direct current.

The current measuring device of the control module II can measure the magnitude I of the current output by the branch circuit after passing through the voltage stabilizer and the rectifier₁While the rated current of each LED lamp is I_nThe second control module is configured with a calculation module according to the formula INT (I)₁÷I_n) Calculating to obtain the current I on the first branch₁The maximum number M of the LED lamps can be supplied, then the control module controls the closing of M groups of isolating switches connected with the branch circuit I and the LED lamps, namely the M LED lamps are powered by the branch circuit I, and the corresponding isolating switches are recorded as S₁S₂......S_m。

And then the control module III reacts to act, except the LED lamps corresponding to the isolating switches which are controlled to be turned off by the control module II, all the rest LED lamps and the isolating switches between the branch circuits II are controlled to be turned off by the control module III, namely the rest (N-M) LED lamps are powered by the storage battery, and the corresponding isolating switches are marked as S_m+1’S_m+2’......S_n’。

When the voltage measuring device bound on the control module I displays that the energy value of the output voltage of the energy converter is smaller than U_minWhen the voltage is smaller than U, the first control module generates a voltage smaller than U_minThe current of the first branch circuit is input into a second branch circuit where the storage battery is located, namely the isolating switch is switched to the position of a contact point b in the diagram 6, at the moment, the first branch circuit does not participate in power supply of the LED lamp due to no current passing, namely the N LED lamps are completely supplied with power by the second branch circuit where the storage battery is located, at the moment, the first branch circuit is connected with the isolating switch of the LED lamp and is completely switched off, the second branch circuit is connected with the isolating switch of the LED lamp and is completely switched off, and meanwhile, the voltage generated by thermal power generation is lower than the voltage U_minThe current of the battery supplies power to the storage battery.

The current generated by thermoelectric conversion can not be directly stored in the storage battery as alternating current, and the output current of the energy converter is converted into direct current through the rectifier and then is connected to the storage battery. The direct current output by the rectifying device is input into the storage battery to charge the battery. Meanwhile, the storage battery outputs constant voltage current to supply power for the ship lighting system.

The technical scheme of the invention is further explained in detail by combining the drawings in the specification.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.