阅读说明：本技术 一种带有双级蓄热的储热井供暖系统 (Heat storage well heating system with two-stage heat storage ) 是由 朱海艳 于 2019-09-25 设计创作，主要内容包括：本发明涉及储热井供暖技术领域,具体涉及一种带有双级蓄热的储热井供暖系统,包括有第一储热井、第二储热井、聚光型太阳能集热器、蒸汽换热器、蓄水机构、调温设备和中央控制器；第一储热井分别与聚光型太阳能集热器、蒸汽换热器和蓄水机构连通,聚光型太阳能集热器、蒸汽换热器、第二储热井、蓄水机构和调温设备顺序连通,调温设备分别与第一储热井、第二储热井连通；中央控制器分别与蒸汽换热器和蓄水机构电连接；该系统解决了寒冷地区储热井储热不足的问题,并且调温设备可以在任意气候中保持始终恒定的功率。(The invention relates to the technical field of heat storage well heating, in particular to a heat storage well heating system with two-stage heat storage, which comprises a first heat storage well, a second heat storage well, a light-gathering solar heat collector, a steam heat exchanger, a water storage mechanism, a temperature adjusting device and a central controller, wherein the first heat storage well is connected with the second heat storage well through a pipeline; the first heat storage well is communicated with the concentrating solar heat collector, the steam heat exchanger and the water storage mechanism respectively, the concentrating solar heat collector, the steam heat exchanger, the second heat storage well, the water storage mechanism and the temperature adjusting device are communicated in sequence, and the temperature adjusting device is communicated with the first heat storage well and the second heat storage well respectively; the central controller is respectively electrically connected with the steam heat exchanger and the water storage mechanism; the system solves the problem of insufficient heat storage of the heat storage well in the cold region, and the temperature adjusting equipment can keep constant power all the time in any climate.)

1. A heat storage well heating system with double-stage heat storage is characterized by comprising a first heat storage well (1), a second heat storage well (2), a light-concentrating solar heat collector (3), a steam heat exchanger (4), a water storage mechanism (5), a temperature adjusting device (6) and a central controller;

the first heat storage well (1) is respectively communicated with the concentrating solar heat collector (3), the steam heat exchanger (4) and the water storage mechanism (5), the concentrating solar heat collector (3), the steam heat exchanger (4), the second heat storage well (2), the water storage mechanism (5) and the temperature adjusting equipment (6) are sequentially communicated, and the temperature adjusting equipment (6) is respectively communicated with the first heat storage well (1) and the second heat storage well (2);

the central controller is respectively and electrically connected with the steam heat exchanger (4) and the water storage mechanism (5).

2. The heating system of the heat storage well with the double-stage heat storage according to claim 1, further comprising a first water pump (7 a) and a second water pump (7 b), wherein the first heat storage well (1) is communicated with the water storage mechanism (5) through the first water pump (7 a), the second heat storage well (2) is communicated with the water storage mechanism (5) through the second water pump (7 b), and the central controller is electrically connected with the first water pump (7 a) and the second water pump (7 b).

3. The heating system of the heat storage well with the double-stage heat storage function according to claim 1, further comprising a third water pump (7 c), wherein the first heat storage well (1) is communicated with the steam heat exchanger (4) through the third water pump (7 c), and the central controller is electrically connected with the third water pump.

4. The system of claim 1, wherein the central controller comprises a control module, an outdoor temperature sensor, an indoor temperature sensor, a heat exchanger temperature sensor and a water storage mechanism temperature sensor;

the outdoor temperature sensor is arranged outdoors, the indoor temperature sensor is arranged indoors, the heat exchanger temperature sensor is arranged in the heat exchanger, and the water storage mechanism temperature sensor is arranged in the water storage mechanism;

and the outdoor temperature sensor, the indoor temperature sensor, the heat exchanger temperature sensor, the water storage mechanism temperature sensor, the first water pump (7 a), the second water pump (7 b) and the second water pump (7 b) are electrically connected with the control module.

5. The system for heating a heat storage well with two-stage heat storage according to claim 1, wherein the concentrating solar collector (3) is a trough solar collector.

6. The system for heating a heat storage well with two-stage heat storage according to claim 1, wherein the steam heat exchanger (4) is a plate heat exchanger.

7. The system for heating the heat storage well with the two-stage heat storage is characterized in that the water storage mechanism (5) comprises a three-way valve (5 a) and a heat storage electric boiler (5 b), the heat storage electric boiler (5 b) is respectively communicated with a first water pump (7 a) and a second water pump (7 b) through the three-way valve (5 a), and the heat storage electric boiler (5 b) is communicated with the temperature regulating device (6).

8. The heating system of the heat storage well with the two-stage heat storage is characterized in that the temperature adjusting device (6) comprises a heating radiator, a water supply pipeline and a water return pipeline, the heating radiator is installed indoors, a water inlet of the heating radiator is communicated with a water outlet of the heat storage type electric boiler (5 b) through the water supply pipeline, and a water outlet of the heating radiator is communicated with a water inlet of the first heat storage well (1) through the water return pipeline.

9. The heating system of the heat storage well with the two-stage heat storage function according to claim 1, further comprising a fourth water pump (7 d) and a fifth water pump (7 e), wherein the temperature adjusting device (6) is a cold and hot water type ground source heat pump unit, the temperature adjusting device (6) is communicated with the first heat storage well (1) through the fourth water pump (7 d), and the temperature adjusting device (6) is communicated with the second heat storage well (2) through the fifth water pump (7 e).

Technical Field

The invention relates to the technical field of heat storage well heating, in particular to a heat storage well heating system with two-stage heat storage.

Background

In order to solve the problems of winter heating and the shortage of non-renewable energy sources, a mature novel renewable clean energy source is urgently needed to be found, and the system comprises the collection, storage and utilization of new energy sources and is a complete and rigorous system.

The popular small household solar water heater system and other similar solar heat storage devices are used for short-term heat storage of solar heat supply. Due to the characteristics of low solar energy density on the earth surface, alternate change of seasons and day and night and the like, a short-term heat storage system for solar heat supply inevitably has great instability, so that the solar utilization efficiency is very low.

The superficial layer of the earth surface is a huge solar heat collector which is not limited by regions, resources and the like, and is really large in quantity, wide in range and ubiquitous. This near infinite renewable energy stored in the shallow layers of the earth's surface makes geothermal energy a form of clean renewable energy as well. The temperature of geothermal energy or ground surface shallow geothermal resources is relatively stable throughout the year, is higher than the ambient air temperature in winter and lower than the ambient air temperature in summer, and is a good heat pump heat source and air conditioning cold source, and the temperature characteristic enables the operating efficiency of a ground source heat pump to be 40% higher than that of a traditional air conditioning system, so that the energy is saved and the operating cost is saved by about 40%. In addition, the constant geothermal energy temperature ensures that the heat pump unit operates more reliably and stably and ensures the high efficiency and the economy of the system.

How to utilize solar energy accumulated on the superficial layer of the earth surface for heating becomes a problem at present.

Chinese patent CN109654581A discloses a compound heating system based on cross-season heat storage of a confined aquifer, which combines a cross-season heat storage heating technology with an underground aquifer recharging energy storage technology, applies an original aquifer which can not continuously mine underground water due to the reduction of underground water level as an energy storage device, and reconstructs an in-situ heat well into a heat storage well and a heat collection well; in non-heating seasons, the water is heated by energy provided by solar energy and other energy sources and then is fed back into the heat storage well, and heat preservation and storage are carried out by means of the characteristics of low flow rate and small heat loss of an underground aquifer; in the heating season, the stored hot water is extracted from the underground aquifer through the heat collecting well and is respectively conveyed to each heating user by the heating unit.

The heating system disclosed in the patent utilizes a heat storage well for heat supply, but in cold regions, the temperature of water in the heat storage well is low, and the solar energy stored on the shallow ground surface is insufficient for providing enough heat in winter.

Disclosure of Invention

The invention aims to provide a heat storage well heating system with two-stage heat storage, which comprises a first heat storage well, a second heat storage well, a concentrating solar heat collector, a steam heat exchanger, a water storage mechanism, a temperature adjusting device and a central controller, wherein the first heat storage well is connected with the first heat storage well;

the first heat storage well is communicated with the concentrating solar heat collector, the steam heat exchanger and the water storage mechanism respectively, the concentrating solar heat collector, the steam heat exchanger, the second heat storage well, the water storage mechanism and the temperature adjusting device are communicated in sequence, and the temperature adjusting device is communicated with the first heat storage well and the second heat storage well respectively;

the central controller is respectively electrically connected with the steam heat exchanger and the water storage mechanism.

As a preferred scheme of the heat storage well heating system with the double-stage heat storage, the heat storage well heating system further comprises a first water pump and a second water pump, the first heat storage well is communicated with the water storage mechanism through the first water pump, the second heat storage well is communicated with the water storage mechanism through the second water pump, and the central controller is electrically connected with the first water pump and the second water pump.

As a preferred scheme of the heat storage well heating system with the double-stage heat storage, the heat storage well heating system further comprises a third water pump, the first heat storage well is communicated with the steam heat exchanger through the third water pump, and the central controller is electrically connected with the steam heat exchanger.

As a preferred scheme of a heat storage well heating system with two-stage heat storage, the central controller comprises a control module, an outdoor temperature sensor, an indoor temperature sensor, a heat exchanger temperature sensor and a water storage mechanism temperature sensor;

the outdoor temperature sensor is arranged outdoors, the indoor temperature sensor is arranged indoors, the heat exchanger temperature sensor is arranged in the heat exchanger, and the water storage mechanism temperature sensor is arranged in the water storage mechanism;

and the outdoor temperature sensor, the indoor temperature sensor, the heat exchanger temperature sensor, the water storage mechanism temperature sensor, the first water pump, the second water pump and the second water pump are all electrically connected with the control module.

As a preferred scheme of the heat storage well heating system with the two-stage heat storage, the light-gathering solar heat collector is a trough type solar heat collector.

As a preferred scheme of the heat storage well heating system with the double-stage heat storage, the steam heat exchanger is a plate heat exchanger.

As a preferred scheme of the heat storage well heating system with the two-stage heat storage, the water storage mechanism comprises a three-way valve and a heat storage electric boiler, the heat storage electric boiler is respectively communicated with the first water pump and the second water pump through the three-way valve, and the heat storage electric boiler is communicated with the temperature adjusting equipment.

As an optimal scheme of the heat storage well heating system with the two-stage heat storage, the temperature adjusting device comprises heating plates, a water supply pipeline and a water return pipeline, the heating plates are installed indoors, water inlets of the heating plates are communicated with water outlets of the heat storage type electric boiler through the water supply pipeline, and water outlets of the heating plates are communicated with a water inlet of the first heat storage well through the water return pipeline.

As a preferred scheme of the heat storage well heating system with the two-stage heat storage, the system further comprises a fourth water pump and a fifth water pump, the temperature regulating device is a cold and hot water type ground source heat pump unit, the temperature regulating device is communicated with the first heat storage well through the fourth water pump, and the temperature regulating device is communicated with the second heat storage well through the fifth water pump.

The invention has the beneficial effects that:

the first heat storage well is communicated with the concentrating solar heat collector, the steam heat exchanger and the water storage mechanism through a plurality of water pipes and a water pump respectively, the concentrating solar heat collector is communicated with the steam heat exchanger through a steam pipeline, and the steam heat exchanger, the second heat storage well, the water storage mechanism, the temperature regulating equipment and the first heat storage well are communicated in sequence and are communicated with the water pump through the water pipes;

the water pump extracts cold water from the first heat storage well and respectively transmits the cold water to the concentrating solar heat collector and the steam heat exchanger, the concentrating solar heat collector converts water in the concentrating solar heat collector into high-pressure steam through solar energy and transmits the high-pressure steam to the steam heat exchanger, the cold water and the high-pressure steam from the first heat storage well and the concentrating solar heat collector are respectively and fully mixed in the steam heat exchanger to form hot water, the hot water flows into the second heat storage well to be stored, the heat storage well in the prior art can store warm water at the highest temperature of 35 ℃, and the steam heat exchanger can produce hot water at 70 ℃, so that the hot water at 70 ℃ can be stored in the second heat storage well;

the central controller is used for monitoring the temperature in the steam heat exchanger and the water storage mechanism and adjusting the flow of the first water pump, the second water pump and the third water pump according to the requirement so as to adjust the water temperature output by the steam heat exchanger and the water storage mechanism;

the water storage mechanism is used for converging cold water stored in the first heat storage well and hot water stored in the second heat storage well to enable the cold water and the hot water to become warm water suitable for being used by the temperature adjusting equipment;

the temperature regulating equipment is used for heating, and the hot water is cooled to be cold water after being used in the temperature regulating equipment and returns to the first heat storage well for storage.

1. The combination of the concentrating solar heat collector and the steam heat exchanger can enable the heat storage well to store hot water with very high water temperature, and the problem of insufficient heat storage of the heat storage well in cold regions is solved;

2. the hot water well can be combined with the cold water well for heating, can also be used for heating independently, and can also be combined with a heat accumulating type electric boiler for heating, and the multi-pole heat accumulating mechanism enables the temperature regulating equipment to keep constant power all the time in any climate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic diagram of a heat storage well heating system with two-stage heat storage according to an embodiment of the present invention;

fig. 2 is a system diagram of a thermal storage well heating system with two-stage heat storage according to an embodiment of the present invention;

in the figure:

1. a first heat storage well;

2. a second heat storage well;

3. a concentrating solar collector;

4. a steam heat exchanger; 4a, a spray tower; 4b, a porous spray head;

5. a water storage mechanism; 5a, a three-way valve; 5b, a heat accumulating type electric boiler;

6. a temperature adjusting device;

7a, a first water pump; 7b, a second water pump; 7c, a third water pump; 7d, a fourth water pump; 7e and a fifth water pump.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 2, the heat storage well heating system with two-stage heat storage includes a first heat storage well 1, a second heat storage well 2, a light-concentrating solar heat collector 3, a steam heat exchanger 4, a water storage mechanism 5, a temperature adjusting device 6 and a central controller;

the first heat storage well 1 is respectively communicated with the light-concentrating solar heat collector 3, the steam heat exchanger 4 and the water storage mechanism 5, the light-concentrating solar heat collector 3, the steam heat exchanger 4, the second heat storage well 2, the water storage mechanism 5 and the temperature adjusting equipment 6 are sequentially communicated, and the temperature adjusting equipment 6 is respectively communicated with the first heat storage well 1 and the second heat storage well 2;

the central controller is electrically connected with the steam heat exchanger 4 and the water storage mechanism 5 respectively.

The heat storage system is characterized by further comprising a first water pump 7a and a second water pump 7b, the first heat storage well 1 is communicated with the water storage mechanism 5 through the first water pump 7a, the second heat storage well 2 is communicated with the water storage mechanism 5 through the second water pump 7b, and the central controller is electrically connected with the first water pump 7a and the second water pump 7 b.

The central controller regulates and controls the temperature of hot water stored in the water storage mechanism 5 by adjusting the first water pump 7a and the second water pump 7b, when winter comes, the requirement of the temperature regulating device 6 on the input water temperature is higher and higher along with the reduction of the outdoor temperature, and the first water pump 7a gradually reduces the flow rate of cold water input by the first heat storage well 1, so that the temperature of the hot water stored in the water storage mechanism 5 is increased; when summer comes, the temperature control device 6 gradually reduces the input water temperature request along with the rise of the outdoor temperature, the first water pump 7a increases the flow rate of cold water input into the first heat storage well 1, and the second water pump 7b decreases the flow rate of hot water input into the first heat storage well 1, thereby reducing the temperature of hot water stored in the water storage mechanism 5.

The first heat storage well 1 is communicated with the steam heat exchanger 4 through the third water pump 7c, and the central controller is electrically connected with the third water pump 7 c.

Thereby central controller regulates and control the hot water temperature of steam heat exchanger 4 output to second heat storage well 2 through adjustment third water pump 7c, when the inside high temperature of steam heat exchanger 4, third water pump 7c increases the cold water flow of first heat storage well 1 output, thereby reduce the inside temperature of steam heat exchanger 4, when the inside temperature of steam heat exchanger 4 is crossed lowly, third water pump 7c reduces the cold water flow of first heat storage well 1 output, thereby improve the inside temperature of steam heat exchanger 4.

The central controller comprises a control module, an outdoor temperature sensor, an indoor temperature sensor, a heat exchanger temperature sensor and a water storage mechanism temperature sensor;

the outdoor temperature sensor is arranged outdoors, the indoor temperature sensor is arranged indoors, the heat exchanger temperature sensor is arranged in the heat exchanger, and the water storage mechanism temperature sensor is arranged in the water storage mechanism;

and the outdoor temperature sensor, the indoor temperature sensor, the heat exchanger temperature sensor, the water storage mechanism temperature sensor, the first water pump 7a, the second water pump 7b and the second water pump 7b are all electrically connected with the control module.

The control module is an Anbesi ABX18 steam heat exchanger 4X temperature controller electric box, the heat exchanger temperature sensor and the water storage mechanism temperature sensor are loose-guide WZP-187-3PBO stainless steel waterproof temperature sensors, and the outdoor temperature sensor and the indoor temperature sensor are NTC thermistor temperature sensors; the temperature control device comprises a heat exchanger temperature sensor, a water storage mechanism temperature sensor, an outdoor temperature sensor and an indoor temperature sensor, wherein the temperature sensor sends the temperature inside the steam heat exchanger 4 and the water storage mechanism 5 and the temperature outside and inside the water storage mechanism 5 to a temperature controller electric box respectively, when the temperature reaches a set temperature, a corresponding relay operates, the temperature controller electric box sends a signal to a first water pump 7a, a second water pump 7b and a third water pump 7c, so that the working modes of the first water pump 7a, the second water pump 7b and the third water pump 7c are changed according to the temperature outside and inside the water storage mechanism 5, and the water pumping quantity of the first water pump 7a, the second water pump 7b and the third water pump 7c is adjusted to further adjust the temperature inside the steam heat exchanger 4 and the water.

The light-gathering solar heat collector 3 is a trough type solar heat collector.

The trough type solar thermal collector is a solar thermal collector which focuses and reflects sunlight on a line by means of a trough type parabolic reflector, and a thermal collecting tube is arranged on the focal line to absorb solar radiation energy after the sunlight is focused and reflected; the fluid in the pipe is heated by a heat carrier in the pipe to be directly utilized, or the fluid in the pipe is heated into steam to be directly utilized;

the groove type solar heat collector is an industrial steam opening 3000mm heat collector developed by Chengdu Changde solar power company Limited, the outlet temperature of a heat collection field of the heat collector is at least reduced by more than 150 degrees compared with the field of photo-thermal power generation, the configuration cost of materials, heat-conducting media and the whole system is greatly reduced, the temperature and the pressure are reduced, so that the heat collection system is also reduced in safety risk, the reflector adopts a two-piece design, the construction and installation cost is also greatly reduced, and the heat collector can be directly used for the heating system without adjustment.

The steam heat exchanger 4 is a plate heat exchanger.

The high-pressure steam has too high temperature and very high pressure and can cause structural damage of the heat storage well when being directly conveyed into the heat storage well, so that the high-pressure steam needs to be decompressed and condensed into hot water by a heat exchanger so as to be converted into water with the temperature suitable for being stored in the heat storage well; the steam heat exchanger 4 uses an alphalaval plate heat exchanger i60-MZM-37 which can input saturated steam with a temperature exceeding 100 ℃ and a pressure above 10bar, and output hot water at 60 or 80 ℃.

The water storage mechanism 5 comprises a three-way valve 5a and a heat accumulating type electric boiler 5b, the heat accumulating type electric boiler 5b is respectively communicated with a first water pump 7a and a second water pump 7b through the three-way valve 5a, and the heat accumulating type electric boiler 5b is communicated with the temperature adjusting device 6.

The heat accumulating type electric boiler 5b can store water, heat and preserve heat, and in cold winter, the heat accumulating type electric boiler 5b can preserve heat of hot water transmitted from the second heat accumulation well 2, so that heat loss of the hot water is prevented, the hot water can be further heated, and the requirement of the temperature adjusting equipment 6 in a severe cold area is met.

The temperature adjusting device 6 comprises a heating plate, a water supply pipeline and a water return pipeline, the heating plate is installed indoors, a water inlet of the heating plate is communicated with a water outlet of the heat accumulating type electric boiler 5b through the water supply pipeline, and a water outlet of the heating plate is communicated with a water inlet of the first heat accumulation well 1 through the water return pipeline.

During hot water in the heat accumulation formula electric boiler 5b entered into the radiator through the water supply pipeline, the radiator carried out direct heat exchange with indoor cold air, can improve indoor temperature, and the cold water that the heat exchange in the radiator finishes returns to first heat storage well 1 through the return water pipeline and stores, this kind of heating equipment simple structure, maintain easy, low cost.

The system is characterized by further comprising a fourth water pump 7d and a fifth water pump 7e, the temperature regulating device 6 is a cold and hot water type ground source heat pump unit, the temperature regulating device 6 is communicated with the first heat storage well 1 through the fourth water pump 7d, and the temperature regulating device 6 is communicated with the second heat storage well 2 through the fifth water pump 7 e.

The cold and hot water type ground source heat pump unit can be used for heating and refrigerating; in summer, the first water pump 7a, the second water pump 7b and the heat accumulating type electric boiler 5b are turned off, the fourth water pump 7d outputs cold water in the first heat accumulation well 1 to the temperature regulating device 6, the temperature regulating device 6 works to discharge cold energy in the cold water into a room and discharge indoor heat into the cold water, so that warm water enters the second heat accumulation well 2 to be stored; in winter, the fourth water pump 7d and the fifth water pump 7e are closed, the first water pump 7a, the second water pump 7b and the heat accumulating type electric boiler 5b are opened, the heat accumulating type electric boiler 5b outputs hot water to the temperature adjusting device 6, the temperature adjusting device 6 works to discharge heat in the hot water to the indoor, and discharge indoor cold energy to the hot water, so that cold water enters the first heat storage well 1 to be stored.

The working principle of the invention is as follows:

the first heat storage well 1 is communicated with the light-concentrating solar heat collector 3, the steam heat exchanger 4 and the water storage mechanism 5 through a plurality of water pipes and water pumps respectively, the light-concentrating solar heat collector 3 is communicated with the steam heat exchanger 4 through a steam pipeline, and the steam heat exchanger 4, the second heat storage well 2, the water storage mechanism 5, the temperature regulating equipment 6 and the first heat storage well 1 are communicated in sequence and are communicated with the water pumps through the water pipes;

the water pump extracts cold water from the first heat storage well 1 and respectively transmits the cold water to the light-concentrating solar heat collector 3 and the steam heat exchanger 4, the light-concentrating solar heat collector 3 converts water in the light-concentrating solar heat collector into high-pressure steam through solar energy and transmits the high-pressure steam to the steam heat exchanger 4, the cold water and the high-pressure steam from the first heat storage well 1 and the light-concentrating solar heat collector 3 are respectively and fully mixed in the steam heat exchanger 4 to form hot water, the hot water flows into the second heat storage well 2 to be stored, the heat storage well in the prior art can store warm water at the highest temperature of 35 ℃, and the steam heat exchanger 4 can produce hot water at 70 ℃, so that the hot water at 70 ℃ can be stored in the second heat storage well 2;

the central controller is used for monitoring the internal temperatures of the steam heat exchanger 4 and the water storage mechanism 5 and adjusting the flow rates of the first water pump 7a, the second water pump 7b and the third water pump 7c according to requirements, so that the water temperatures output by the steam heat exchanger 4 and the water storage mechanism 5 are adjusted;

the water storage mechanism 5 is used for merging cold water stored in the first heat storage well 1 and hot water stored in the second heat storage well 2 to enable the cold water and the hot water to become warm water suitable for the temperature adjusting equipment 6;

the temperature adjusting device 6 is used for heating, and the hot water is cooled to be cold water after being used in the temperature adjusting device 6 and returns to the first heat storage well 1 for storage.

It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.