TWI672433B - Heat recycle system - Google Patents

Abstract

A thermal energy recovery system includes a fluid supply source that supplies a supply fluid, a first heat exchange device, a liquid storage device, a high temperature heat exchange device, and a first heat source. The fluid supply source, the first heat exchange device, the liquid storage device, and the high temperature heat exchange device are connected by a pipeline. The supply fluid is sequentially output through the first heat exchange device, the liquid storage device, and the high temperature heat exchange device. The first heat source, the high temperature heat exchange device, and the first heat exchange device are interconnected by a line in which the first heat transfer fluid circulates. The first heat transfer fluid enters the high temperature heat exchange device from the first heat source and then enters the first heat exchange device. The first heat transfer fluid enters the high temperature heat exchange device at a higher temperature to exchange heat with the supply fluid, and the first heat transfer fluid enters the first heat exchange device to exchange heat with the supply fluid at a lower temperature.

Description

Heat recovery system

The present invention relates to a thermal energy recovery system; in particular, the present invention relates to a thermal energy recovery system that generates thermal energy for operation of an implement.

Converting, for example, electrical energy or other energy sources into kinetic energy is a mechanical principle that is widely used in various industries. Taking a compressor as an example, the compressor is mainly a pressurized fluid to generate a high-pressure fluid, and the high-pressure fluid has been widely used in transportation, cleaning, constant temperature and other technical fields, and is a major power source for pneumatic components, pipeline transportation, and the like. Therefore, the compressor has become an indispensable role in many fields.

However, in the process of energy conversion, energy loss is often accompanied by high heat. For example, in the conventional compressor, the air compressor increases the air pressure by mechanical energy such as a compression space or a rotating impeller, but in the process of air pressurization, mechanical energy is also converted into heat energy. If it is only absorbed by an external fluid, the heat generated by the air compressor is not reused, resulting in waste. In order to make efficient use of the mechanical energy consumed by the compressor, how to effectively recover and reuse the heat generated by the compressor has become one of the main problems to be solved.

It is an object of the present invention to provide a thermal energy recovery system that can efficiently recover thermal energy, allowing unutilized thermal energy to be recovered and reused.

The thermal energy recovery system of the present invention includes a fluid supply source that supplies a supply fluid, a first heat exchange device, a liquid storage device, a high temperature heat exchange device, and a first heat source. The fluid supply source, the first heat exchange device, the liquid storage device, and the high temperature heat exchange device are connected by a pipeline. The supply fluid is sequentially output through the first heat exchange device, the liquid storage device, and the high temperature heat exchange device. The first heat source, the high temperature heat exchange device, and the first heat exchange device are interconnected by a line, and the first heat transfer fluid circulates between the first heat source, the high temperature heat exchange device, and the first heat exchange device. The first heat transfer fluid enters the high temperature heat exchange device from the first heat source and then enters the first heat exchange device. The first heat transfer fluid enters the high temperature heat exchange device at a first temperature to exchange heat with the supply fluid, and the first heat transfer fluid enters the first heat exchange device to exchange heat with the supply fluid at a second temperature lower than the first temperature.

In an embodiment of the invention, the thermal energy recovery system further includes a second heat source interconnected by a pipeline and a second heat exchange device, and the second heat transfer fluid circulates between the second heat source and the second heat exchange device. The second heat exchange device transfers the fluid supply between the fluid supply source and the first heat exchange device via another line, and the second heat transfer fluid is in heat exchange with the supply fluid in the second heat exchange device.

In an embodiment of the invention, the first heat transfer fluid has a first temperature when it leaves the first heat source, the second heat transfer fluid has a second temperature when it leaves the second heat source, and the first temperature is higher than the second temperature.

In an embodiment of the invention, the thermal energy recovery system further includes a third heat source interconnected by a pipeline and a third heat exchange device, and the third heat transfer fluid circulates between the third heat source and the third heat exchange device. The third heat exchange device then transports the fluid supply source and the supply fluid between the liquid storage devices via another line. The first heat exchange device and the third heat exchange device respectively obtain the supply fluid, and then respectively output to the liquid storage device, and the third heat transfer fluid and the supply fluid are in the third heat Heat exchange in the exchange unit.

In an embodiment of the invention, the third heat transfer fluid has a third temperature when leaving the third heat source, and the first heat transfer fluid has a recovery temperature between the high temperature heat exchange device and the first heat exchange device, and the recovery temperature is the same as The three temperatures are similar.

In an embodiment of the invention, the thermal energy recovery system further includes a heating device connected to the high temperature heat exchange device in a pipeline. The supply fluid from the high temperature heat exchange device is heated by the heating device and output.

In an embodiment of the invention, the thermal energy recovery system further includes a fourth heat exchange device. The fourth heat exchange device is connected to the heating device by a pipeline, and the fluid supply source and the supply fluid between the liquid storage devices are transported through another pipeline. The fourth heat exchange device and the first heat exchange device respectively obtain the supply fluids and output them to the liquid storage devices, respectively. The supply fluid partially passing through the heating device passes through the other line through the fourth heat exchange device and exchanges heat with the supply fluid flowing to the liquid storage device.

In an embodiment of the invention, the high temperature heat exchange device and the first heat exchange device heat the supply fluid and cool the first heat transfer fluid.

In an embodiment of the invention, the high temperature heat exchange device is connected to the liquid storage device in another line. The supply fluid flows out of the liquid storage device, passes through the high temperature heat exchange device, and is output or returned to the liquid storage device.

In an embodiment of the invention, the high temperature heat exchange device and the first heat exchange device comprise a plate heat exchanger.

By the above-mentioned high-temperature heat exchange device, the supply fluid can recover the heat energy generated by the first heat source after flowing out from the liquid storage device, thereby improving the recovery efficiency of the heat energy and ensuring the heating effect on the supply fluid.

F1, F2, F3, F4‧‧‧ supply fluid

H1, H2, H4‧‧‧ first heat transfer fluid

H3, H5‧‧‧ second heat transfer fluid

H6‧‧‧The third heat transfer fluid

100, 200, 300, 400‧‧‧ Thermal Energy Recovery System

110, 210, 310, 410‧‧‧ fluid supply sources

111, 121, 123, 131, 141, 143, 151, 211, 241, 251, 261, 263, 271, 281, 283, 285, 341, 351, 371, 391, 393, 395, 3101, 4111, 4113, 4115, 4121, 4123‧‧‧ pipeline

120, 220, 320, 420‧‧‧ first heat exchange device

130, 230, 330, 430‧ ‧ liquid storage device

140, 240, 340‧‧‧High temperature heat exchanger

150, 250, 350‧‧‧ first heat source

260, 360, 460‧‧‧ second heat exchange unit

270, 370‧‧‧ second heat source

280, 380, 480‧‧‧ heating devices

390, 490‧‧‧ third heat exchange device

3100‧‧‧ Third heat source

4110‧‧‧ fourth heat exchange unit

4120‧‧‧purification unit

1 is a schematic view of a first embodiment of a thermal energy recovery system; FIG. 2 is a schematic view of a second embodiment of a thermal energy recovery system; FIG. 3 is a schematic view of a third embodiment of a thermal energy recovery system; schematic diagram.

The present invention provides a thermal energy recovery system that preferably recovers a heat source generated, for example, when an air compressor or other implement is in operation, and provides a supply fluid that is heated by the recovered heat source. The supply fluid may preferably be water or other liquids and may be used in industrial cleaning, industrial processes or in life. In addition, the thermal energy recovery system may further include other heat sources that can generate thermal energy, and the application of the present invention is not limited to the type of heat source.

1 is a schematic view of a heat energy recovery system in a first embodiment of the present invention. In the embodiment shown in FIG. 1, the thermal energy recovery system 100 includes a fluid supply source 110 that supplies a supply fluid F1, a first heat exchange device 120, a liquid storage device 130, a high temperature heat exchange device 140, and a first heat source 150, wherein The first heat source 150 is, for example, an air compressor or the like that generates heat energy during operation. The fluid supply source 110, the first heat exchange device 120, the liquid storage device 130, and the high temperature heat exchange device 140 are connected by lines 111, 121, and 131 to transfer the supply fluid F1, and then output from the high temperature heat exchange device 140 through the line 141. . The first heat source 150 and the high-temperature heat exchange device 140 are connected by a line 151. The high-temperature heat exchange unit 140 and the first heat exchange unit 120 are connected by a line 143. The first heat exchange unit 120 and the first heat source are connected by a line 123. The first heat source 150, the high temperature heat exchange device 140, the first heat exchange device 120, and the pipelines 151, 143, 123 form a loop, the first heat transfer fluid H1 circulates in the loop. Therefore, both the first heat transfer fluid H1 and the supply fluid F1 pass through the high temperature heat exchange device 140 and exchange heat therein, and the first heat transfer fluid H1 and the supply fluid F1 also pass through the first heat exchange device 120 and exchange heat therein. .

In the first embodiment of the present invention, the supply fluid F1 is sequentially output through the first heat exchange device 120, the liquid storage device 130, and the high temperature heat exchange device 140. The first heat transfer fluid H1 is, for example, a cooling water or a cooling fluid that absorbs the heat energy of the first heat source 150. The first heat transfer fluid H1 enters the high temperature heat exchange device 140 from the first heat source 150 and then enters the first heat exchange device 120. The first heat transfer fluid H1 enters the high temperature heat exchange device 140 at a first temperature to exchange heat with the supply fluid F1, and the first heat transfer fluid H1 enters the first heat exchange device 120 and the supply fluid F1 at a second temperature lower than the first temperature. exchange.

For example, the fluid supply source 110 of the first embodiment of the present invention supplies, for example, a supply fluid F1 having a temperature of 25 degrees Celsius, and the first heat source 150, for example, heats the temperature of the first heat transfer fluid H1 to 95 degrees Celsius. When the temperature of the supply fluid F1 in the liquid storage device 130 is, for example, 68 degrees Celsius, the supply fluid F1 can be heat-exchanged with the first heat transfer fluid H1 in the high temperature heat exchange device 140, and then heated to 80 degrees Celsius. Meanwhile, the temperature of the first heat transfer fluid H1 is, for example, 70 degrees Celsius when flowing out of the high temperature heat exchange device 140, so the first heat transfer fluid H1 can also heat the temperature of the supply fluid F1 to the Celsius 68 in the first heat exchange device 120. The degree further flows to the liquid storage device 130. On the other hand, when the first heat source 150 is, for example, an air compressor, the first heat transfer fluid H1 can be returned to the heat energy generated by the air compressor (the first heat source 150) after being cooled twice, thereby providing a good cooling effect. . The present invention is not limited to the temperature of the above fluid and the kind of the heat source. In other embodiments, the fluid may be exchanged between other temperatures to recover heat generated by other types of heat sources.

Since in the thermal energy recovery system 100 of the first embodiment of the present invention, the order of the first heat transfer fluid H1 passing through the high temperature heat exchange device 140 and the first heat exchange device 120 is opposite to the supply fluid F1, the heat energy of the first heat transfer fluid H1 is The high temperature heat exchange device 140 and the first heat exchange device 120 can be released, thereby improving the heat energy recovery efficiency of the first heat source 150. At the same time, the supply fluid F1 flows out of the liquid storage device 130 and then absorbs the heat energy from the higher temperature first heat transfer fluid H1 in the high temperature heat exchange device 140, thereby outputting the supply fluid F1 with a high temperature. Therefore, the thermal energy recovery system 100 of the present embodiment can recover the thermal energy from the first heat source 150 twice, and the supply fluid F1 can be further heated after flowing out of the liquid storage device 130, further compensating for the loss of the supply fluid F1 in the liquid storage device 130. Heat energy is raised to the desired operating temperature and maximizes heat recovery.

Specifically, the first heat exchange device 120 and the high temperature heat exchange device 140 in the above embodiment heat the supply fluid F1 and cool the first heat transfer fluid H1. On the other hand, the first heat exchange device 120 and the high temperature heat exchange device 140 include, for example, a plate heat exchanger, thereby saving volume and increasing heat recovery efficiency. In other words, the first heat exchange device 120 and the high temperature heat exchange device 140 preferably transfer the heat energy between the supply fluid F1 and the first heat transfer fluid H1 without mixing the supply fluid F1 and the first heat transfer fluid H1.

The technical content of the present invention will be described below in other embodiments. The description will focus on the differences between the various embodiments and their functions. For similar components in the embodiments, refer to the description of the first embodiment, and details are not described below.

2 is a schematic view of a heat energy recovery system in a second embodiment of the present invention. Referring to FIG. 2, the thermal energy recovery system 200 of the second embodiment includes a fluid supply source 210, a second heat exchange device 260, a first heat exchange device 220, a liquid storage device 230, a high temperature heat exchange device 240, and a first heat source 250. And a second heat source 270. Different from the first embodiment, the heat recovery of the second embodiment System 200 includes a second heat exchange device 260 and a second heat source 270, and second heat source 270 connects second heat exchange device 260 with lines 271, 261 and forms another circuit, and second heat transfer fluid H3 is at second heat source 270 and The loop formed by the two heat exchange devices 260 circulates inside. The second heat exchange device 260 of the present embodiment transmits the supply fluid F2 between the fluid supply source 210 and the first heat exchange device 220 via another line 263.

The supply fluid F2 in the second embodiment of the present invention flows from the line 211 to the second heat exchange device 260, and the second heat transfer fluid H3 in the line 271 is, for example, cooling water or cooling liquid that absorbs the heat energy of the second heat source 270, and supplies the fluid. F2 and the second heat transfer fluid H3 are heat exchanged in the second heat exchange device 260. Therefore, the second heat exchange device 260 and the first heat exchange device 220 can sequentially heat the supply fluid F2 and enhance the efficiency of heat energy recovery by staged heating.

In detail, in the second embodiment of the present invention, when the first heat transfer fluid H2 leaves the first heat source 250, it has a first temperature in the line 251, and when the second heat transfer fluid H3 leaves the second heat source 270, in the line 271. There is a second temperature, wherein the first temperature is higher than the second temperature. That is, the second heat source 270 is, for example, a compressor that produces a lower temperature of the heat transfer fluid H3, and the second heat exchange device 260 can heat the supply fluid F2 in advance by the second heat transfer fluid H3 at a lower temperature, and then A heat transfer fluid H2 is heated in the first heat exchange device 220 and the high temperature heat exchange device 240.

For example, the fluid supply source 210 of the present embodiment supplies a supply fluid F2 having a temperature of, for example, 25 degrees Celsius, and the second heat source 270 heats the temperature of the second heat transfer fluid H3 to, for example, 35 degrees Celsius. In the second heat exchange unit 260, the temperature of the supply fluid F2 can be increased by 33 degrees Celsius by the heat energy brought about by the second heat transfer fluid H3, and then heated to, for example, 68 degrees Celsius in the first heat exchange unit 220. Therefore, the heating efficiency of the supply fluid F2 can be increased, and at the same time, the first heat exchange device 220 can handle a larger amount of fluid because the temperature difference is lowered. The invention is not limited to the above The temperature range of the fluid.

On the other hand, the thermal energy recovery system 200 of the second embodiment of the present invention further includes a heating device 280 connected to the high temperature heat exchange device 240 by a line 241. The heating device 280 can heat the supply fluid F2 from the high temperature heat exchange device 240, thereby further ensuring that the supply fluid F2 is output at an appropriate temperature. At the same time, the high temperature heat exchange device 240 is connected to the liquid storage device 230 in another line 285. The supply fluid F2 flows out of the liquid storage device 230, passes through the high temperature heat exchange device 240 and the heating device 280, and is then output or returned to the liquid storage device 230. In other words, between the high-temperature heat exchange device 240 and the liquid storage device 230, the supply fluid F2 having no output is recovered by a pipeline forming circuit.

For example, after flowing through line 281, supply fluid F2 may be output via line 283 or may be returned via line 285 to liquid storage device 230 for storage. The present invention is not limited to the connection mode of the above embodiment. In other embodiments, the high temperature heat exchange device 240 can be connected to the pipeline 285, and the supply fluid F2 can be directly returned to the liquid storage device after passing through the high temperature heat exchange device 240. 230, the supply fluid F2 can also be directly output via line 241 into line 283. In other words, the pipeline that can be output and can be returned to the liquid storage device in the embodiment of the present invention is not limited to being connected to the heating device, and can also be connected to the high temperature heat exchange device.

Figure 3 is a schematic illustration of a thermal energy recovery system in a third embodiment of the present invention. Referring to FIG. 3, the thermal energy recovery system 300 of the third embodiment includes a fluid supply source 310, a second heat exchange device 360, a first heat exchange device 320, a third heat exchange device 390, a liquid storage device 330, and a high temperature heat exchange. The device 340, the heating device 380, the first heat source 350, the second heat source 370, and the third heat source 3100. Unlike the second embodiment, the thermal energy recovery system 300 includes a third heat exchange device 390 and a third heat source 3100.

The third heat source 3100 of the embodiment is connected to the third heat exchange by the pipelines 3101, 391. The device 390 forms a third loop, and the third heat transfer fluid H6 circulates within the loop formed by the third heat source 3100 and the third heat exchange device 390. The third heat exchange device 390 then transports the fluid supply source 310 and the supply fluid F3 between the liquid storage devices 330 via another line 393, 395. The first heat exchange device 320 and the third heat exchange device 390 respectively obtain the supply fluid F3 and output to the liquid storage device 330, respectively. The third heat transfer fluid H6 in the line 3101 is, for example, cooling water or cooling liquid that absorbs the heat energy of the third heat source 3100, and the third heat transfer fluid H6 from the line 3101 and the supply fluid F3 from the line 393 are in the third heat exchange unit 390. Heat exchange.

In other words, the first heat exchange device 320 and the third heat exchange device 390 are connected in parallel between the liquid storage device 330 and the second heat exchange device 360. Therefore, the supply fluid F3 of the present embodiment may absorb the thermal energy of the third heat transfer fluid H6 at the third heat exchange device 390 or the first heat transfer fluid H4 at the first heat exchange device 320 before flowing to the liquid storage device 330. Thermal energy. Since the temperature of the first heat transfer fluid H4 after passing through the high temperature heat exchange device 340 is lowered, the supply fluid F3 can be heated together with the third heat exchange device 390 to the same or similar temperature. That is, the third heat source 3100 of the present embodiment is, for example, a temperature at which the temperature of the heat-conducting fluid F3 is lower than that of the heat-generating fluid F3 of the first heat source 350, and is lower than the temperature of the heat-conducting fluid F3 produced by the second heat source 370. High compressor.

The third heat transfer fluid H6 of the third embodiment of the present invention has a third temperature when leaving the third heat source 3100, and the first heat transfer fluid H4 has a recovery temperature between the high temperature heat exchange device 340 and the first heat exchange device 320, and is recovered. The temperature is close to the third temperature. For example, the temperature of the second heat transfer fluid H5 of the third embodiment of the present invention is, for example, 30 to 40 degrees Celsius in the line 371, the temperature of the third heat transfer fluid H6 at the line 3101, and the temperature of the first heat transfer fluid H4 at the line 341. For example, 40 to 70 degrees Celsius, the temperature of the first heat transfer fluid H4 at the line 351 is, for example, 70 to 100 degrees Celsius. Therefore, the supply fluid F3 of the present embodiment can be heated in stages via the above-described heat transfer fluids H5, H6, H4 to reach an appropriate temperature. The invention is not limited to the temperature range of the fluid described above.

Figure 4 is a schematic illustration of a thermal energy recovery system in accordance with a fourth embodiment of the present invention. Referring to FIG. 4, the thermal energy recovery system 400 of the fourth embodiment is similar to the thermal energy recovery system 300 of the third embodiment described above, except that the thermal energy recovery system 400 includes a fourth heat exchange device 4110 and a purification device 4120.

The purification device 4120 in the fourth embodiment of the present invention receives the supply fluid F4 from the heating device 480, and the purification device 4120 transfers the purified partial supply fluid F4 to the line 4123, and supplies the impurities generated in the purification process to another portion. Fluid F4 is delivered to line 4121. The fourth heat exchange device 4110 is connected to the purification device 4120 via a line 4121, and the fluid supply source 410 and the supply fluid F4 between the liquid storage devices 430 are transferred via another line 4111 and a line 4113. In other words, the first heat exchange device 420, the third heat exchange device 490, and the fourth heat exchange device 4110 are connected in parallel between the liquid storage device 430 and the second heat exchange device 460, and thus the fourth heat exchange The device 4110, the first heat exchange device 420, and the third heat exchange device 490 respectively obtain the supply fluid F4 and output them to the liquid storage device 430, respectively. Meanwhile, in the supply fluid F4 from the heating device 480, a part of the supply fluid F4 containing impurities enters the fourth heat exchange device 4110 from the line 4121, and exchanges heat with the supply fluid F4 from the second heat exchange device 460 to increase the flow. The supply of fluid F4 to reservoir 430 is supplied, while supply fluid F4 from line 4121 is again discharged via line 4115. Therefore, the purification device 4120 of the present embodiment can output the purified supply fluid F4 while also recovering thermal energy from the supply fluid F4 having impurities.

Therefore, the supply fluid F4 of the present embodiment can also take part of the already heated supply fluid F4 to heat the unheated fluid, further improving the heat energy recovery efficiency.

It can be seen from the above that the thermal energy recovery system of the embodiment of the present invention can recover the thermal energy generated by the first heat source, and the first heat transfer fluid heated by the first heat source and the supply fluid in the high temperature heat exchange device and the first heat exchange device Heat exchange, the heat energy can be recovered again, and the liquid storage device is located between the first heat exchange device and the high temperature heat exchange device, so that the supply fluid before entering the liquid storage device and the supply fluid flowing out from the liquid storage device can be separately heated, In order to let the temperature of the supply fluid fall within the appropriate range, while improving the overall heat recovery.

Claims (11)

A thermal energy recovery system comprising: a fluid supply source, a supply fluid-first heat exchange device; a liquid storage device; a high temperature heat exchange device, the fluid supply source, the first heat exchange device, The liquid storage device and the high-temperature heat exchange device are connected by a pipeline, and the supply fluid is sequentially output through the first heat exchange device, the liquid storage device, and the high-temperature heat exchange device; a heat source interconnected with the high temperature heat exchange device and the first heat exchange device, a first heat transfer fluid at the first heat source, the high temperature heat exchange device, and the first heat exchange device Circulating; a second heat source; and a second heat exchange device connected to the second heat source by a pipeline, and a second heat transfer fluid circulating between the second heat source and the second heat exchange device Transmitting the fluid supply source and the supply fluid between the first heat exchangers via another line; wherein the first heat transfer fluid enters the high temperature heat exchange device from the first heat source, enter The first heat exchange device, the first heat transfer fluid enters the high temperature heat exchange device at a first temperature to exchange heat with the supply fluid, and the first heat transfer fluid enters the first heat exchange device at a recovery temperature Heat exchange with the supply fluid, the first temperature being higher than the recovery temperature, the second heat transfer fluid being in heat exchange with the supply fluid in the second heat exchange device. A thermal energy recovery system comprising: a fluid supply source providing a supply fluid-first heat exchange device; a liquid storage device; a high temperature heat exchange device, the fluid supply source, the first heat exchange device, the liquid storage device, and the The high-temperature heat exchange device is connected by a pipeline, and the supply fluid is sequentially output through the first heat exchange device, the liquid storage device, and the high-temperature heat exchange device; a first heat source, and the high temperature The heat exchange device and the first heat exchange device are connected to each other by a pipeline, and a first heat transfer fluid circulates between the first heat source, the high temperature heat exchange device, and the first heat exchange device; a heat source; and a third heat exchange device connected to the third heat source by a pipeline, a third heat transfer fluid circulating between the third heat source and the third heat exchange device, and then passing through another pipeline Said fluid supply source and said supply fluid between said liquid storage means; wherein said first heat transfer fluid enters said high temperature heat exchange means from said first heat source and then enters said first heat exchange means The first The hot fluid enters the high temperature heat exchange device at a first temperature to exchange heat with the supply fluid, and the first heat transfer fluid enters the first heat exchange device to recover heat exchange with the supply fluid at a recovery temperature, the first a temperature higher than the recovery temperature; wherein the first heat exchange device and the third heat exchange device respectively obtain the supply fluid, and then output to the liquid storage device, respectively, and the third heat transfer fluid and The supply fluid is heat exchanged in the third heat exchange device. A thermal energy recovery system comprising: a fluid supply source providing a supply fluid-first heat exchange device; a liquid storage device; a high temperature heat exchange device, the fluid supply source, the first heat exchange device, the liquid storage device, and the The high-temperature heat exchange device is connected by a pipeline, and the supply fluid is sequentially output through the first heat exchange device, the liquid storage device, and the high-temperature heat exchange device; a first heat source, and the high temperature The heat exchange device and the first heat exchange device are connected to each other by a pipeline, and a first heat transfer fluid is circulated between the first heat source, the high temperature heat exchange device, and the first heat exchange device; Connected to the high temperature heat exchange device by a line, the supply fluid is heated from the high temperature heat exchange device after being heated by the heating device; and a fourth heat exchange device connected to the heating device by a pipeline Transmitting the fluid supply source and the supply fluid between the liquid storage devices via another line; wherein the first heat transfer fluid enters the high temperature heat exchange device from the first heat source, and then The first heat exchange device, the first heat transfer fluid enters the high temperature heat exchange device to exchange heat with the supply fluid at a first temperature, and the first heat transfer fluid enters the first heat exchange at a recovery temperature The device is in heat exchange with the supply fluid, the first temperature being higher than the recovery temperature; wherein the fourth heat exchange device and the first heat exchange device respectively obtain the supply fluid and output to the a liquid storage device, and the supply fluid partially passing through the heating device passes through the fourth heat exchange device via another line and exchanges heat with the supply fluid flowing to the liquid storage device. The thermal energy recovery system of claim 2 or 3, further comprising: a second heat source; and a second heat exchange device connected to the second heat source by a pipeline, wherein the second heat transfer fluid is Circulating between the second heat source and the second heat exchange device, and transmitting the supply fluid between the fluid supply source and the first heat exchange device via another line; wherein the second heat transfer fluid The supply fluid is heat exchanged in the second heat exchange device. The thermal energy recovery system of claim 1, wherein the first heat transfer fluid has a first temperature when leaving the first heat source, and the second heat transfer fluid has a first time when leaving the second heat source. And a second temperature, the first temperature being higher than the second temperature. The thermal energy recovery system of claim 3, further comprising: a third heat source; and a third heat exchange device connected to the third heat source by a pipeline, and a third heat transfer fluid at the third Circulating between the heat source and the third heat exchange device, and transferring the fluid supply source and the supply fluid between the liquid storage devices via another line; wherein the first heat exchange device and the first The three heat exchange devices respectively obtain the supply fluid and output to the liquid storage device, respectively, and the third heat transfer fluid and the supply fluid are heat exchanged in the third heat exchange device. The thermal energy recovery system of claim 2, wherein the third heat transfer fluid has a third temperature when leaving the third heat source, and the first heat transfer fluid is at the high temperature heat exchange device and The recovery temperature is between the first heat exchange devices, and the recovery temperature is similar to the third temperature. The thermal energy recovery system of claim 1 or 2, further comprising: a heating device connected to the high temperature heat exchange device by a pipeline, the supply fluid being supplied from the high temperature heat exchange device The heating device is heated and then output. The thermal energy recovery system of any one of claims 1 to 3, wherein the high temperature heat exchange device and the first heat exchange device heat the supply fluid and cool the first heat transfer fluid. The thermal energy recovery system according to any one of claims 1 to 3, wherein the high temperature heat exchange device is connected to the liquid storage device by another line, the supply fluid flowing out from the liquid storage device And outputting or flowing back to the liquid storage device after passing through the high temperature heat exchange device. The heat recovery system according to any one of claims 1 to 3, wherein the high temperature heat exchange device and the first heat exchange device comprise a plate heat exchanger.