JP2018009744A - Exhaust heat recovery system, exhaust heat recovery method and cooling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust heat recovery system capable of improving an energy utilization rate of a cooling system, an exhaust heat recovery method and the cooling system.SOLUTION: In one embodiment, an exhaust heat recovery system recovers exhaust heat of an absorption type or adsorption type refrigeration machine including: a cooling section for cooling fluid to be cooled; a heat absorbing section for absorbing heat of first heat source fluid or absorbing heat of second heat source fluid heated by using the heat of the first heat source fluid; and a heat radiating section for radiating heat received from the fluid to be cooled and the heat absorbed by the heat absorbing section. The exhaust heat recovery system includes: a water flow passage that supplies water to the heat radiating section, radiates the heat received from the fluid to be cooled and the heat absorbed by the heat absorbing section to the water in the heat radiating section and conveys the water with a first temperature that has been discharged from the heat radiating section; and a heater for heating the water from the water flow passage by using the first or second heat source fluid and producing the water with a second temperature to be used as hot water.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to an exhaust heat recovery system, an exhaust heat recovery method, and a cooling system.

  FIG. 13 is a schematic diagram illustrating a first example of a configuration of a conventional cooling system.

  The cooling system of FIG. 13 includes a heat source fluid heater 1, a heat source fluid pump 2, a heat source fluid flow path 3, a refrigerator 4, a cooled fluid pump 5, a cooled fluid path 6, and a cooling load 7. A cooling water pump 11, a cooling water flow path 12, a cooling tower 13, a blower 14, and an air introduction part 15. The refrigerator 4 includes a heat absorbing part 4a, a cooling part 4b, and a heat radiating part 4c. The refrigerator 4 of this embodiment is an absorption type or an adsorption type.

  The heat source fluid is conveyed by the heat source fluid pump 2 through the heat source fluid flow path 3 and heated by the heat source fluid heater 1. An example of the heat source fluid heater 1 is a small biomass boiler that burns biomass fuel such as wood chips, and an example of the heat source fluid is gas or liquid water. In this case, the heat source fluid heater 1 heats liquid water with combustion exhaust gas generated by burning biomass fuel, and changes the liquid water to gaseous water (steam). Another example of the heat source fluid heater 1 is a solar heat collector, and an example of the heat source fluid in this case is a heat transfer oil. Furthermore, another example of the heat source fluid heater 1 is an exhaust heat recovery unit that recovers factory exhaust heat and the like, and an example of the heat source fluid in this case is water. The heat source fluid discharged from the heat source fluid heater 1 flows into the heat absorbing part 4a, and the temperature is lowered by heating the heat absorbing part 4a. That is, the heat absorption part 4a absorbs the heat of the heat source fluid. The heat source fluid circulates between the heat source fluid heater 1 and the heat absorption part 4a via the heat source fluid flow path 3.

  The refrigerator 4 includes a heat absorption part 4 a, a cooling part 4 b, and a heat radiation part 4 c, and has a refrigerant in the refrigerator 4. Examples of the refrigerant are water and ammonia. The cooling unit 4b cools the fluid to be cooled by the heat of vaporization (latent heat of vaporization) of the refrigerant. An example of the fluid to be cooled is water. The heat absorption part 4a uses the heat source fluid to absorb heat from the refrigerant or a substance that holds the refrigerant. For example, the heat absorbing unit 4a heats the absorption liquid or the adsorbent obtained by collecting the refrigerant from the cooling unit 4b with the heat source fluid, thereby vaporizing the refrigerant. The heat dissipating part 4c dissipates heat from the refrigerant or the substance holding the refrigerant using the cooling water. For example, the heat radiating unit 4c cools the adsorbent whose refrigerant is being recovered with cooling water, or cools the refrigerant vaporized from the absorbing liquid or the adsorbent with cooling water to liquefy (condense) the refrigerant. Thus, the heat radiating part 4c radiates the heat received from the fluid to be cooled and the heat absorbed by the heat absorbing part 4a to the cooling water. The cooling unit 4b cools the fluid to be cooled using the refrigerant from the heat radiating unit 4c.

  The to-be-cooled fluid is conveyed by the to-be-cooled fluid pump 5 via the to-be-cooled fluid flow path 6, and is cooled by the cooling unit 4b. The fluid to be cooled discharged from the cooling unit 4b flows into the cooling load 7 and the temperature rises by cooling the cooling load 7. An example of the cooling load 7 is a facility to be cooled such as a building air conditioner or a device to be cooled such as a server computer. In the former case, the fluid to be cooled is used as the cooling water for the cooling air source of the air conditioning. The fluid to be cooled circulates between the cooling unit 4 b and the cooling load 7 through the fluid flow path 6 to be cooled.

  The cooling water is conveyed through the cooling water flow path 12 by the cooling water pump 11, and the temperature rises by cooling the heat radiation part 4c. The cooling water discharged from the heat radiating part 4 c is cooled by the atmosphere in the cooling tower 13. The cooling water circulates between the heat radiation part 4 c and the cooling tower 13 through the cooling water flow path 12.

  The blower 14 conveys the air introduced from the air introduction unit 15 to the cooling tower 13. This atmosphere is heated in the cooling tower 13 by the heat absorbed by the cooling water. Therefore, the retained heat of the heat source fluid and the fluid to be cooled is given to the atmosphere through the cooling water, and is released to the outside by the atmosphere.

  FIG. 14 is a schematic diagram for explaining the operation of the refrigerator 4 of FIG.

As shown in FIG. 14, the heat absorbing unit 4a absorbs the enthalpy H ₁ from the heat source fluid, the cooling section 4b absorbs enthalpy H ₂ from the cooling fluid. The heat radiating portion 4c emits enthalpy _{H 3} to the cooling water. A relationship of H ₁ + H ₂ = H ₃ is established between these enthalpies H _{1 to} H ₃ . An example of the ratio of enthalpy H _{1 to} H ₃ is H ₁ : H ₂ : H ₃ = 1.0: 0.6: 1.6. This description can be applied not only to the refrigerator 4 of FIG. 13 but also to the refrigerator 4 of FIG.

  FIG. 15 is a schematic diagram showing a second example of the configuration of a conventional cooling system. In FIG. 15, the same or similar components as those shown in FIG. 13 are denoted by the same reference numerals, and the description overlapping with the description of FIG. 13 is omitted.

  The cooling system of FIG. 15 includes a heat source fluid heater 21, a heat source fluid pump 22, and a heat source fluid flow path 23 in addition to the components shown in FIG. In the description of FIG. 15, the components 1 to 3 are referred to as the first heat source fluid heater 1, the first heat source fluid pump 2, and the first heat source fluid flow path 3, and the components 21 to 23. Are referred to as a second heat source fluid heater 21, a second heat source fluid pump 22, and a second heat source fluid flow path 23. In addition, the heat source fluid conveyed through the first heat source fluid flow path 3 is referred to as a first heat source fluid, and the heat source fluid conveyed through the second heat source fluid flow path 23 is referred to as a second heat source fluid.

  The first heat source fluid is conveyed by the first heat source fluid pump 2 via the first heat source fluid flow path 3 and heated by the first heat source fluid heater 1. The first heat source fluid discharged from the first heat source fluid heater 1 flows into the second heat source fluid heater 21 and heats the second heat source fluid in the second heat source fluid heater 21 to increase the temperature. descend. The first heat source fluid circulates between the first heat source fluid heater 1 and the second heat source fluid heater 21 via the first heat source fluid flow path 3.

  The second heat source fluid is transported by the second heat source fluid pump 22 via the second heat source fluid flow path 23 and heated by the second heat source fluid heater 21. Examples of the second heat source fluid are heat transfer oil and water. The 2nd heat source fluid discharged | emitted from the 2nd heat source fluid heater 21 flows in into the heat absorption part 4a, and temperature falls by heating the heat absorption part 4a. That is, the heat absorption part 4a absorbs the heat of the second heat source fluid. The second heat source fluid circulates between the second heat source fluid heater 21 and the heat absorption part 4a via the second heat source fluid flow path 23.

  Here, the cooling systems of FIGS. 13 and 15 will be compared.

  In FIG. 13, depending on the components contained in the heat source fluid, precipitates accumulate in the refrigerator 4 (heat absorption part 4 a), so it is necessary to frequently disassemble and clean the refrigerator 4. Degradation is undesirable. On the other hand, in FIG. 15, since the second heat source fluid heater 21 is disassembled and cleaned instead of the refrigerator 4, it is not necessary to disassemble the refrigerator 4.

  FIG. 16 is a supplementary diagram for explaining a conventional cooling system. FIG. 16 shows a part of the cooling system of FIGS. 13 and 15 in the same drawing for convenience of explanation.

  In FIG. 13, the heat source fluid circulates, but it does not need to circulate only by passing through the refrigerator 4 (heat absorption part 4a) as shown in FIG. In this case, an example of the heat source fluid is hot spring water that springs from the ground 10, and the cooling system does not include the heat source fluid heater 1. When the heat source fluid is hot spring water, precipitates are likely to accumulate in the refrigerator 4 of FIG. 16, and the refrigerator 4 needs to be frequently disassembled and cleaned. Therefore, in this example, the refrigerator 4 is disassembled.

  Similarly, in FIG. 15, the first heat source fluid circulates, but it does not need to circulate only by passing through the second heat source fluid heater 21 as shown in FIG. In this case, an example of the first heat source fluid is hot spring water that springs from the ground 10, and the cooling system does not include the first heat source fluid heater 1. When the heat source fluid is hot spring water, precipitates are likely to accumulate in the second heat source fluid heater 21 of FIG. 16, and the second heat source fluid heater 21 needs to be frequently disassembled and cleaned. At this time, it is not necessary to disassemble the refrigerator 4 in this example.

  FIG. 17 is a schematic diagram showing a first example of the refrigerator 4 of FIG.

The refrigerator 4 in FIG. 17 is an absorption type and includes an evaporator 4d ₁ , a condenser 4d ₂ , an absorber 4d _3, and a regenerator 4d ₄ .

Evaporator 4d ₁ is supplied with liquid refrigerant from the flow path _{N 1.} Atmosphere in the evaporator 4d ₁ because it is set to the low pressure, refrigerant is vaporized (evaporated) in the evaporator 4d _1. Evaporator 4d ₁ is a fluid to be cooled from the cooling fluid channel 6 is cooled by evaporation heat of the refrigerant, and discharges the refrigerant gas into the flow path N _2. The evaporator 4d ₁ corresponds to the cooling unit 4b described above.

Absorber 4d ₃ is supplied with the gaseous refrigerant from the flow path _{N 2.} The absorber 4d ₃ causes the absorption liquid from the flow path N ₄ to absorb the refrigerant, and discharges the absorption liquid containing the refrigerant to the flow path N ₃ . An example of the combination of the refrigerant and the absorbing liquid in this case is ammonia and water.

Regenerator 4d ₄ is supplied to the absorption liquid containing a refrigerant from the flow path N _3. The regenerator 4d ₄ heats the absorbing liquid with the heat source fluid from the heat source fluid flow path 3. As a result, the refrigerant is released from the absorbing liquid, and the refrigerant is vaporized. Absorbing liquid that has released the refrigerant is discharged to the flow path N _4, vaporized refrigerant is discharged to the flow path N _5. The regenerator 4d ₄ corresponds to the heat absorption unit 4a described above, and causes the refrigerant to absorb heat using a heat source fluid.

Condenser 4d ₂ is supplied with refrigerant gas from the channel _{N 5.} The condenser 4d ₂ cools the refrigerant with the cooling water from the cooling water passage 12, and liquefies (condenses) the refrigerant. Liquefied solvent is discharged to the channel N _1. Condenser 4d ₂ corresponds to the heat radiating portion 4c of the above, it is radiated from the refrigerant by using the cooling water.

  18 and 19 are schematic views showing a second example of the refrigerator 4 shown in FIG.

18 and 19 show different states of the same refrigerator 4. The refrigerator 4 is an adsorption type, and includes an evaporator 4e ₁ , a condenser 4e ₂ , a first heat exchanger 4e ₃ , a second heat exchanger 4e ₄ , a first inlet valve 4e _5, and a second An inlet valve 4e ₆ , a first outlet valve 4e ₇ , a second outlet valve 4e _8, and a refrigerant pump 4e ₉ are provided. The refrigerator 4 operates to alternately repeat the state of FIG. 18 and the state of FIG.

In FIG. 18, the first inlet valve 4e ₅ and the second outlet valve 4e ₈ are opened, and the second inlet valve 4e ₆ and the first outlet valve 4e ₇ are closed. Further, the valve 12a on the cooling water flow path 12 is set to supply cooling water to the first heat exchanger 4e ₃ and the condenser 4e ₂ , and the valve 3a on the heat source fluid flow path 3 supplies the heat source fluid to the first heat exchanger 4e ₃ and the condenser 4e ₂ . Two heat exchangers 4e ₄ are set to be supplied.

Evaporator 4e ₁ of FIG. 18 are supplied with refrigerant from the flow path _{M 1} of the liquid by the coolant pump 4e _9. An example of the refrigerant in this case is water. Since the atmosphere in the evaporator 4e ₁ is set to a low pressure, the refrigerant evaporates (evaporates) in the evaporator 4e ₁ . The evaporator 4e ₁ cools the cooled fluid from the cooled fluid flow path 6 by the heat of vaporization of the refrigerant. Vaporized refrigerant flows into the first heat exchanger 4e ₃ through the first inlet valve 4e _5, the refrigerant remains liquid collects in reservoir K _1. Refrigerant accumulated in the reservoir _{K 1} again flows from the flow path _{M 2} in the flow path _{M 1.} The evaporator 4e ₁ corresponds to the cooling unit 4b described above.

The first heat exchanger 4e _{3 in} FIG. 18 includes the first adsorbent K ₃ and is supplied with a gaseous refrigerant from the first inlet valve 4e ₅ . The first adsorbent K ₃ is to adsorb the refrigerant, generates adsorption heat. The first heat exchanger 4e ₃ absorbs this adsorption heat by the cooling water from the cooling water flow path 12. The first heat exchanger 4e _{3 in} this case corresponds to the above-described heat radiating portion 4c and radiates heat from a substance (adsorbent) holding the refrigerant using cooling water.

Second heat exchanger 4e ₄ of Figure 18 is provided with a second adsorbent _{K 4.} The second adsorbent K ₄ has already adsorbed the refrigerant during the state of the previous Figure 19. Therefore, when the second adsorbent K ₄ is heated by a heat source fluid from the heat source fluid channel 3, the refrigerant is desorbed from the second adsorbent K _4, the refrigerant is vaporized. Vaporized refrigerant flows into the condenser 4e ₂ via the second outlet valve 4e _8. The second heat exchanger 4e _{4 in} this case corresponds to the heat absorption part 4a described above, and uses a heat source fluid to absorb heat to a substance (adsorbent) that holds the refrigerant.

Condenser 4e ₂ in FIG. 18 are supplied with refrigerant gas from the second outlet valve 4e _8. The condenser 4e ₂ cools the refrigerant with the cooling water from the cooling water passage 12, and liquefies (condenses) the refrigerant. Liquefied solvent, it collects in reservoir K _2. Refrigerant accumulated in the reservoir _{K 2} again flows from the flow channel _{M 3} to the channel _{M 1.} The condenser 4e ₂ corresponds to the above-described heat radiating portion 4c and radiates heat from the refrigerant using cooling water.

On the other hand, in FIG. 19, the first inlet valve 4e ₅ and the second outlet valve 4e ₈ are closed, and the second inlet valve 4e ₆ and the first outlet valve 4e ₇ are opened. The valve 12a on the cooling water flow path 12 is set so as to supply cooling water to the second heat exchanger 4e ₄ and the condenser 4e _2, the valve 3a in the heat source fluid channel 3, the heat source fluid first 1 is set to be supplied to the heat exchanger 4e ₃ .

The operations of the evaporator 4e ₁ , the condenser 4e ₂ , the first heat exchanger 4e ₃ , and the second heat exchanger 4e ₄ in FIG. 19 are respectively the evaporator 4e ₁ , the condenser 4e ₂ , and the second heat exchange in FIG. The operation of the unit 4e ₄ and the first heat exchanger 4e ₃ is the same. That is, in FIGS. 18 and 19, the roles of the first heat exchanger 4e ₃ and the second heat exchanger 4e ₄ are reversed. As a result, the first and second adsorbents K ₃ and K ₄ alternately repeat the adsorption and desorption of the refrigerant.

  In general, the absorption refrigerator 4 has an advantage of high cooling performance and an advantage of low noise generated. On the other hand, the adsorption refrigerator 4 has an advantage that a low-temperature heat source fluid can be easily used.

  The description of FIGS. 17 to 19 can be applied to the refrigerator 4 of FIG. 15 by replacing the heat source fluid flow path 3 with the heat source fluid flow path 23.

JP 2011-89722 A Japanese Patent No. 5664779

  In the cooling system of FIGS. 13 and 15, heat of the heat source fluid and the fluid to be cooled is given to the cooling water by the refrigerator 4, and the heat of the cooling water is thrown away to the atmosphere by the cooling tower 13. Thus, in the conventional cooling system, the exhaust heat of the refrigerator 4 is often discarded to the atmosphere. The reason is that the temperature of the cooling water that has absorbed the heat of the heat source fluid and the fluid to be cooled is not high, and the heat of the cooling water is low-quality heat, so that the value of using the heat of the cooling water is small.

  In the refrigerator 4 that uses hot spring heat, solar heat, small biomass boiler, factory exhaust heat, or the like as the heat source, the coefficient of performance (COP) of the refrigerator 4 is further reduced because the temperature of the heat source fluid is low. COP is obtained by dividing the absolute value E2 of the cold produced by the refrigerator 4 by the heat E1 used to drive the refrigerator 4 (COP = E2 / E1). On the other hand, the exhaust heat E3 of the refrigerator 4 is the sum of the absolute value E2 of the cold heat and the drive heat E1 (E3 = E1 + E2). Therefore, the exhaust heat E3 of the refrigerator 4 is expressed by the following equation (1).

E3 = E2 (1 / COP + 1) (1)
Thus, when the refrigerator 4 produces cold energy, exhaust heat E3 larger than the absolute value E2 of the cold energy is generated. For this reason, it is desired to effectively use the low-quality exhaust heat E3 without throwing it away.

  Accordingly, an object of the present invention is to provide an exhaust heat recovery system, an exhaust heat recovery method, and a cooling system that can effectively use the exhaust heat of the cooling system.

  According to one embodiment, the exhaust heat recovery system includes a cooling unit that cools the fluid to be cooled, and a second heat source that absorbs heat of the first heat source fluid or is heated by heat of the first heat source fluid. Exhaust heat of an absorption or adsorption type refrigerator having a heat absorption part that absorbs heat of a fluid, and a heat radiation part that radiates heat received from the fluid to be cooled and heat absorbed by the heat absorption part. to recover. The exhaust heat recovery system supplies water to the heat radiating part, radiates heat received from the cooled fluid and heat absorbed by the heat absorbing part to the water in the heat radiating part, and from the heat radiating part. A water flow path for transporting the discharged water at the first temperature, and the water at the second temperature used as hot water by heating the water from the water flow path using the first or second heat source fluid. And a heater for manufacturing.

It is a schematic diagram which shows the structure of the cooling system of 1st Embodiment. It is a schematic diagram which shows the structure of the cooling system of 2nd Embodiment. It is a schematic diagram which shows the structure of the cooling system of 3rd Embodiment. It is a schematic diagram which shows the structure of the cooling system of 4th Embodiment. It is a schematic diagram which shows the structure of the cooling system of 5th Embodiment. It is a schematic diagram which shows the structure of the cooling system of 6th Embodiment. It is a schematic diagram which shows the structure of the cooling system of 7th Embodiment. It is a schematic diagram which shows the structure of the cooling system of 8th Embodiment. It is a schematic diagram which shows the structure of the cooling system of 9th Embodiment. It is a schematic diagram which shows the structure of the cooling system of the modification of 9th Embodiment. It is a schematic diagram which shows the structure of the cooling system of 10th Embodiment. It is a schematic diagram which shows the structure of the cooling system of the modification of 10th Embodiment. It is a schematic diagram which shows the 1st example of a structure of the conventional cooling system. It is a schematic diagram for demonstrating operation | movement of the refrigerator of FIG. It is a schematic diagram which shows the 2nd example of a structure of the conventional cooling system. It is a supplementary figure for demonstrating the conventional cooling system. It is a schematic diagram which shows the 1st example of the refrigerator of FIG. It is a schematic diagram (1/2) which shows the 2nd example of the refrigerator of FIG. It is a schematic diagram (2/2) which shows the 2nd example of the refrigerator of FIG. It is a supplementary figure for demonstrating the cooling system of 1st Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 12 and 20, the same or similar components as those shown in FIGS. 13 to 19 are denoted by the same reference numerals, and the description overlapping with the description of FIGS. 13 to 19 is omitted.

(First embodiment)
Drawing 1 is a mimetic diagram showing the composition of the cooling system of a 1st embodiment.

  The cooling system of FIG. 1 is similar to the cooling system of FIG. 13 in that the heat source fluid heater 1, the heat source fluid pump 2, the heat source fluid flow path 3, the refrigerator 4, the cooled fluid pump 5, the cooled fluid flow path 6, And a cooling load 7 is provided. The refrigerator 4 includes a heat absorption part 4a, a cooling part 4b, and a heat radiation part 4c. The refrigerator 4 of the present embodiment is an absorption type or an adsorption type, and has, for example, the structure shown in FIG. 17 or the structure shown in FIGS. 18 and 19. The cooling system of FIG. 1 further includes a heater 31, a hot water tank 32, a water pump 33, and a water flow path 34 that constitute an exhaust heat recovery system that recovers exhaust heat from the refrigerator 4 and the like.

  The heat source fluid (first heat source fluid) is conveyed by the heat source fluid pump 2 via the heat source fluid flow path 3 and heated by the heat source fluid heater 1. The heat source fluid of this embodiment is heated in the heat source fluid heater 1. Examples of the heat source fluid heater 1 are a small biomass boiler that uses biomass fuel as a heat source, a solar heat collector that uses solar heat as a heat source, and a waste heat recovery device that uses factory exhaust heat as a heat source. The heat source fluid discharged from the heat source fluid heater 1 flows into the heat absorbing part 4a, and the temperature is lowered by heating the heat absorbing part 4a.

  In addition, the heat source fluid of this embodiment is good also as the hot spring water which springs out from the earth 10, as shown in FIG. In this case, the cooling system of FIG. 1 may not include the heat source fluid heater 1. The heat source fluid of this embodiment may be circulated as shown in FIG. 13, or may not be circulated as shown in FIG. The same applies to second to tenth embodiments described later.

  The refrigerator 4 includes a heat absorption part 4 a, a cooling part 4 b, and a heat radiation part 4 c, and has a refrigerant in the refrigerator 4. An example of the refrigerant is ammonia when the refrigerator 4 is an absorption type, and water when the refrigerator 4 is an adsorption type. The cooling unit 4b cools the fluid to be cooled by the heat of vaporization of the refrigerant. An example of the fluid to be cooled is water. When the refrigerator 4 is an absorption type, the heat absorption part 4a heats the absorption liquid that has absorbed the refrigerant with a heat source fluid to vaporize the refrigerant, and the heat radiation part 4c cools the refrigerant vaporized from the absorption liquid with cooling water. To liquefy the refrigerant. On the other hand, when the refrigerator 4 is an adsorption type, the heat absorption part 4a heats the adsorbent adsorbing the refrigerant by the heat source fluid to desorb the refrigerant from the adsorbent, and the heat radiating part 4c removes the adsorbent from the cooling water. And the refrigerant is adsorbed on the adsorbent. The cooling unit 4b cools the fluid to be cooled using the refrigerant from the heat radiating unit 4c.

  The to-be-cooled fluid is conveyed by the to-be-cooled fluid pump 5 via the to-be-cooled fluid flow path 6, and is cooled by the cooling unit 4b. The fluid to be cooled discharged from the cooling unit 4b flows into the cooling load 7 and the temperature rises by cooling the cooling load 7. An example of the cooling load 7 is a facility to be cooled such as a building air conditioner or a device to be cooled such as a server computer.

  Cooling water is conveyed through the water flow path 34 by the water pump 33, and the temperature rises by cooling the heat radiation part 4c. This water discharged from the heat radiating part 4 c is conveyed through the water flow path 34 and supplied to the heater 31.

  The heater 31 is provided in the heat source fluid flow path 3. The heater 31 heats the water from the water channel 34 using the heat source fluid of the heat source fluid channel 3 to produce water used as hot water. The hot water is conveyed through the water flow path 34 and stored in the hot water tank 32. The heater 31 of the present embodiment heats water using a heat source fluid that flows downstream of the heat absorbing unit 4a. The heat source fluid discharged from the heat absorbing part 4a flows into the heater 31 and the temperature is lowered by heating the water in the heater 31. The heat source fluid circulates between the heat source fluid heater 1, the heat absorption unit 4 a, and the heater 31 via the heat source fluid flow path 3.

  In the present embodiment, the heat discharged from the heat radiating unit 4 c is supplied to the water before being heated by the heater 31 without being supplied to the cooling tower 13. An example of this water is tap water. Moreover, the temperature of the stored warm water is, for example, 60 ° C., which is a generally available warm water temperature. This hot water is effectively used for washing dishes at bathing facilities and restaurants. In this embodiment, since there is no heat discarded to the outside, the energy utilization rate is improved to 100%. The energy utilization rate in the present embodiment is a ratio between the heat energy given to the heat source fluid by the heat source fluid heater 1 and the energy used by the cooling system.

  Here, the temperature of the water in the water pump 33 is 15 ° C., the temperature of the water heated by the heat radiation part 4 c is 30 ° C., and the temperature of the water heated by the heater 31 is 60 ° C. 30 ° C. is an example of the first temperature, and 60 ° C. is an example of the second temperature. Further, it is assumed that the refrigerator 4 is an adsorption type and the COP of the refrigerator 4 is 0.5, which is a typical value.

  In this case, if the driving heat E2 of the refrigerator 4 is “2”, the absolute value E1 of the cooling heat is “1”, so the exhaust heat E3 of the refrigerator 4 in the conventional cooling system is “3”. However, in this embodiment, since this heat is used for hot water production, the use heat E4 of the refrigerator 4 is “3”. Furthermore, in this embodiment, since this twice as much heat is utilized by the heater 31 for hot water production, the driving heat of the heater 31 is “6” and the utilization heat of the heater 31 is “6”. As a result, in the present embodiment, the driving heat of the cooling system (driving heat of the refrigerator 4 and the heater 31) E2 ′ becomes “8”, and the utilization heat of the cooling system (the utilization heat of the refrigerator 4 and the heater 31). E4 ′ becomes “9”. Therefore, if the heat conversion rate of the cooling system is (E1 + E4 ′) / E2 ′ and the exhaust heat rate of the cooling system is E3 / E2 ′, the heat conversion rate of this embodiment is 1.25 (= 10/8). Thus, the exhaust heat rate of the present embodiment is 0 (= 0/8).

  FIG. 20 is a supplementary diagram for explaining the cooling system of the first embodiment.

  The cooling system of FIG. 20 includes a cooling water pump 11, a cooling water flow path 12, a cooling tower 13, a blower 14, and an air introduction unit 15 in addition to the components shown in FIG. 1.

  In FIG. 20, the water in the water flow path 34 is heated only by the heater 31 and is not heated by the heat radiating unit 4 c. The heat discharged by the heat radiating part 4c is thrown away to the outside world. In this case, in the above numerical example, the utilization heat conversion rate of the cooling system is 0.875 (= 7/8), and the exhaust heat rate of the cooling system is 0.375 (= 3/8).

  In the cooling system of FIGS. 13 and 15, the heat conversion rate of the cooling system is 0.5 (= 1/2), and the exhaust heat rate of the cooling system is 1.5 (= 3/2). .

  As described above, the cooling system of the present embodiment heats the first temperature water using the heat source fluid from the heat source fluid flow path 3 to produce the second temperature water used as the hot water. Therefore, according to the present embodiment, it is possible to effectively use the exhaust heat of the cooling system.

  This embodiment can be applied even if the heat source in the heat source fluid heater 1 is a high temperature heat source, but the heat source in the heat source fluid heater 1 is a low temperature heat source such as biomass fuel, solar heat, factory exhaust heat, hot spring heat, etc. It can be effectively applied to. Moreover, this embodiment is effectively applicable when the temperature of the heat source fluid at the inlet of the heat absorbing part 4a is 200 ° C. or lower regardless of the heat source. The same applies to second to tenth embodiments described later. The reason is that when the heat source in the heat source fluid heater 1 is a low-temperature heat source, the COP of the refrigerator 4 is lower, and the energy utilization rate when the present embodiment is not applied is low. According to this embodiment, the energy utilization factor when the heat source in the heat source fluid heater 1 is a low-temperature heat source can be greatly improved. The same applies to second to tenth embodiments described later.

  Further, the present invention can be effectively applied when the maximum temperature of the heat source fluid in the heat source fluid flow path 3 is 200 ° C. or less.

(Second Embodiment)
FIG. 2 is a schematic diagram showing the configuration of the cooling system of the second embodiment. In FIG. 2, the same or similar components as those shown in FIG. 1 are denoted by the same reference numerals, and the description overlapping with the description of FIG. 1 is omitted. The same applies to second to tenth embodiments described later.

  As shown in FIG. 1, the heater 31 of the first embodiment heats water using a heat source fluid that flows downstream of the heat absorbing unit 4 a. On the other hand, the heater 31 of 2nd Embodiment heats water using the heat source fluid which flows upstream of the heat absorption part 4a, as shown in FIG.

  In the present embodiment, the temperature of the heat source fluid at the inlet of the heater 31 is higher than the temperature of the heat source fluid at the inlet of the heat absorbing unit 4a. Therefore, according to this embodiment, it becomes easy to heat water to higher temperature. On the other hand, according to the first embodiment, high-temperature hot water can be produced.

(Third embodiment)
FIG. 3 is a schematic diagram showing the configuration of the cooling system of the third embodiment.

  The heat absorption part 4a and the heater 31 of 1st and 2nd embodiment are arrange | positioned in series with respect to the flow of a heat source fluid, as shown in FIG.1 and FIG.2. On the other hand, the heat absorption part 4a and the heater 31 of 3rd Embodiment are arrange | positioned in parallel with respect to the flow of a heat source fluid, as shown in FIG.

The heat source fluid flow path 3 of FIG. 3 is branched into a first branch flow path 35 provided with the heat absorption part 4a and a second branch flow path 36 provided with the heater 31. First and second branch passages 35 and 36 is branched from one flow path L at a first point P _1, which meet at a second point P ₂ on one channel L.

  In the present embodiment, the temperature of the heat source fluid at the inlet of the heater 31 is equal to the temperature of the heat source fluid at the inlet of the heat absorbing unit 4a. Therefore, according to this embodiment, it becomes easy to heat both the heat absorption part 4a and water as high temperature as possible.

(Fourth embodiment)
FIG. 4 is a schematic diagram showing the configuration of the cooling system of the fourth embodiment.

  In FIG. 4, the hot water tank 32 is replaced with a heat utilization destination 37, and the water flow path 34 is replaced with a circulating water flow path 38.

  The water of this embodiment is conveyed by the water pump 33 via the circulating water flow path 38, and is heated by the heat radiating part 4c. The water discharged from the heat radiating unit 4 c is conveyed via the circulating water flow path 38 and supplied to the heater 31. The heater 31 heats this water using the heat source fluid from the heat source fluid flow path 3 to produce water used as hot water. The hot water is conveyed via the circulating water flow path 38 and supplied to the heat utilization destination 37.

  An example of the heat utilization destination 37 is floor heating. The temperature of the water supplied to the heat utilization destination 37 is lowered by being used as a heat source in the heat utilization destination 37. The water discharged from the heat utilization destination 37 is conveyed through the circulating water flow path 38 and is supplied again to the heat radiating unit 4c. Thus, the water of this embodiment circulates between the heat radiating part 4 c, the heater 31, and the heat utilization destination 37 via the circulating water flow path 38.

  When hot water is used for washing dishes in a bathing facility or restaurant, the hot water is disposable. On the other hand, when using warm water for floor heating, warm water can be used repeatedly. Therefore, in this embodiment, it is possible to repeatedly use a limited amount of water by circulating water through the circulating water flow path 38. The heat utilization destination 37 may be equipment other than floor heating.

  Underfloor heating is generally used in winter. Therefore, when the heat utilization destination 37 is floor heating, it is considered that the use of the refrigerator 4 is more likely to cool a device such as a server computer than to cool a facility such as a building cooling. In general, the former is used in summer, while the latter is used regardless of the season.

(Fifth embodiment)
FIG. 5 is a schematic diagram showing the configuration of the cooling system of the fifth embodiment.

  The heat source fluid flow path 3 in FIG. 5 includes a first bypass flow path 44 that bypasses the first flow path provided with the heat absorbing portion 4a and a second bypass flow that bypasses the second flow path provided with the heater 31. Path 48. A plurality of valves 41 to 43, 45 to 47 are provided in the heat source fluid flow path 3 of FIG.

The first bypass flow path 44, the first point P ₁ is branched from the flow path L, which meet at a third point P ₃ to the flow path L. Flow path L between the first point P ₁ and the third point P ₃ is a first flow path of the. The valve 41 is provided in the first flow path between the first point P ₁ and the heat absorbing portion 4a. The valve 42 is provided in the first flow path between the heat absorbing portion 4a and the third point P _3. The valve 43 is provided in the first bypass flow path 44.

The second bypass passage 48 is branched from the flow path L in the fourth point P _4, it is joined with the second point P ₂ to the flow path L. Flow path L between the fourth point P ₄ and the second point P ₂ is a second flow path of the. The valve 45 is provided in the second flow path between the fourth point P ₄ and the heater 31. The valve 46 is provided in the second flow path between the heater 31 and the second point P _2. The valve 47 is provided in the second bypass channel 48.

  In this embodiment, when both cold heat manufacture and hot water manufacture are implemented, the valves 41, 42, 45, and 46 are opened, and the valves 43 and 47 are closed. In this case, water is heated by the heat radiating part 4c and the heater 31, and becomes hot hot water.

  Further, when carrying out an operation that places importance on cold production only, the valves 41, 42, 47 are opened, and the valves 43, 45, 46 are closed. In this case, water is heated only by the heat radiating part 4c and becomes low-temperature hot water.

  When only hot water production is performed, the valves 43, 45, and 46 are opened, and the valves 41, 42, and 47 are closed. In this case, water is heated only by the heater 31. Therefore, in the case where high-temperature hot water is produced without lowering the temperature in this situation, the production amount of hot water is reduced.

  As described above, according to the present embodiment, by using the first and second bypass flow paths 44 and 48, it is possible to select three types of operations related to cold production and hot water production. In the present embodiment, only one of the first and second bypass flow paths 44 and 48 may be provided in the cooling system so that two types of operations can be selected.

(Sixth embodiment)
FIG. 6 is a schematic diagram showing the configuration of the cooling system of the sixth embodiment.

The cooling system of FIG. 6 includes a plurality of valves 51 to 54 in addition to the components shown in FIG. The valve 51 is provided in the first branch flow path 35 between the first point P ₁ and the heat absorbing portion 4a. The valve 52 is provided in the first branch flow channel 35 between the heat absorbing portion 4a and the second point P _2. The valve 53 is provided in the second branch flow path 36 between the first point P ₁ and the heater 31. The valve 54 is provided in the second branch flow path 36 between the heater 31 and the second point P _2.

  In the present embodiment, the valves 51 to 54 are opened when both the cold heat production and the hot water production are performed. In this case, water is heated by the heat radiating part 4c and the heater 31, and becomes hot hot water.

  Further, when performing an operation that places importance on only the cold production, the valves 51 and 52 are opened, and the valves 53 and 54 are closed. In this case, water is heated only by the heat radiating part 4c and becomes low-temperature hot water.

  Moreover, when only warm water manufacture is implemented, the valves 53 and 54 are opened and the valves 51 and 52 are closed. In this case, water is heated only by the heater 31. Therefore, in the case where high-temperature hot water is produced without lowering the temperature in this situation, the production amount of hot water is reduced.

  As described above, according to the present embodiment, by using the first and second branch flow paths 37 and 38, it is possible to select three types of operations related to cold production and hot water production. In the present embodiment, two types of operation may be selected by providing only one of the pair of valves 51 and 52 and the pair of valves 53 and 54 in the cooling system.

(Seventh embodiment)
FIG. 7 is a schematic diagram showing the configuration of the cooling system of the seventh embodiment.

  The cooling system of FIG. 7 includes a heat source fluid heater 21, a heat source fluid pump 22, and a heat source fluid flow path 23 in addition to the components shown in FIG. In the description of FIG. 7, like the description of FIG. 15, the components 1 to 3 are referred to as a first heat source fluid heater 1, a first heat source fluid pump 2, and a first heat source fluid flow path 3. The components 21 to 23 are referred to as a second heat source fluid heater 21, a second heat source fluid pump 22, and a second heat source fluid flow path 23. In addition, the heat source fluid conveyed through the first heat source fluid flow path 3 is referred to as a first heat source fluid, and the heat source fluid conveyed through the second heat source fluid flow path 23 is referred to as a second heat source fluid.

  The first heat source fluid is conveyed by the first heat source fluid pump 2 via the first heat source fluid flow path 3 and heated by the first heat source fluid heater 1. The first heat source fluid discharged from the first heat source fluid heater 1 flows into the second heat source fluid heater 21 and heats the second heat source fluid in the second heat source fluid heater 21 to increase the temperature. descend.

  The second heat source fluid is transported by the second heat source fluid pump 22 via the second heat source fluid flow path 23 and heated by the second heat source fluid heater 21. The 2nd heat source fluid discharged | emitted from the 2nd heat source fluid heater 21 flows in into the heat absorption part 4a, and temperature falls by heating the heat absorption part 4a.

  The refrigerator 4 includes a heat absorption part 4 a, a cooling part 4 b, and a heat radiation part 4 c, and has a refrigerant in the refrigerator 4. The cooling unit 4b cools the fluid to be cooled by the heat of vaporization of the refrigerant. When the refrigerator 4 is an absorption type, the heat absorption unit 4a heats the absorption liquid that has absorbed the refrigerant with the second heat source fluid to vaporize the refrigerant, and the heat dissipation unit 4c uses the cooling water to convert the refrigerant vaporized from the absorption liquid with cooling water. Cool to liquefy the refrigerant. On the other hand, when the refrigerator 4 is an adsorption type, the heat absorption part 4a heats the adsorbent adsorbing the refrigerant with the second heat source fluid to desorb the refrigerant from the adsorbent, and the heat dissipation part 4c removes the adsorbent. Cooling with cooling water causes the adsorbent to adsorb the refrigerant. The cooling unit 4b cools the fluid to be cooled using the refrigerant from the heat radiating unit 4c.

  The to-be-cooled fluid is conveyed by the to-be-cooled fluid pump 5 via the to-be-cooled fluid flow path 6, and is cooled by the cooling unit 4b. The fluid to be cooled discharged from the cooling unit 4b flows into the cooling load 7 and the temperature rises by cooling the cooling load 7.

  Cooling water is conveyed through the water flow path 34 by the water pump 33, and the temperature rises by cooling the heat radiation part 4c. This water discharged from the heat radiating part 4 c is conveyed through the water flow path 34 and supplied to the heater 31.

  In the present embodiment, the heater 31 is provided in the second heat source fluid flow path 23. The heater 31 heats the water from the water flow path 34 using the second heat source fluid to produce water used as hot water. The hot water is conveyed through the water flow path 34 and stored in the hot water tank 32. The heater 31 of this embodiment heats water using the 2nd heat-source fluid which flows downstream of the heat absorption part 4a. The 2nd heat source fluid discharged | emitted from the heat absorption part 4a flows in into the heater 31, and temperature falls by heating the water in the heater 31. FIG. The second heat source fluid circulates between the second heat source fluid heater 21, the heat absorption unit 4 a, and the heater 31 via the second heat source fluid flow path 23.

  Here, the cooling systems of FIGS. 1 and 7 will be compared.

  In FIG. 1, depending on the components contained in the heat source fluid, precipitates accumulate in the refrigerator 4 (heat absorption part 4a) and the heater 31, so the refrigerator 4 and the heater 31 need to be frequently disassembled and cleaned. However, disassembly of the refrigerator 4 and the heater 31 is not desirable. Furthermore, it is not desirable to disassemble the water flow path 34 used for washing dishes in a bathing facility or restaurant. On the other hand, in FIG. 7, since the second heat source fluid heater 21 is disassembled and cleaned instead of the refrigerator 4 and the heater 31, it is necessary to disassemble the refrigerator 4, the heater 31, and the water flow path 34. There is no.

  As described above, the cooling system of the present embodiment heats the first temperature water using the second heat source fluid to produce the second temperature water used as the hot water. Therefore, according to the present embodiment, it is possible to effectively use the exhaust heat of the cooling system.

  In addition, you may apply the heat source fluid heater 21, the heat source fluid pump 22, the heat source fluid flow path 23, and the heater 31 of this embodiment to either of the 2nd-6th embodiment. The same applies to the heat source fluid heater 21, the heat source fluid pump 22, the heat source fluid flow path 23, and the heater 31 of the eighth to tenth embodiments described later.

  In addition, the second heat source fluid of the present embodiment is heated by the heat of the first heat source fluid without passing through another heat source fluid, but the heat of the first heat source fluid passes through one or more types of third heat source fluids. May be heated. That is, the second heat source fluid of this embodiment may be directly heated by the heat of the first heat source fluid or indirectly heated by the heat of the first heat source fluid. The same applies to the eighth to tenth embodiments described later.

  Moreover, although the 1st heat source fluid of this embodiment is heated without passing through another heat source fluid with the heat of low-temperature heat sources, such as biomass fuel, it passes through one or more types of 4th heat source fluids with the heat of a low-temperature heat source. May be heated. That is, the first heat source fluid of this embodiment may be directly heated by the heat of the low-temperature heat source or indirectly heated by the heat of the low-temperature heat source. The same applies to the eighth to tenth embodiments described later.

(Eighth embodiment)
FIG. 8 is a schematic diagram showing the configuration of the cooling system of the eighth embodiment. In FIG. 8, the same or similar components as those shown in FIG. 7 are denoted by the same reference numerals, and the description overlapping with the description of FIG. 7 is omitted. The same applies to the ninth and tenth embodiments described later.

  In the present embodiment, the heater 31 is provided in the first heat source fluid flow path 3. The heater 31 heats the water from the water flow path 34 using the first heat source fluid to produce water used as hot water. The hot water is conveyed through the water flow path 34 and stored in the hot water tank 32. The heater 31 of the present embodiment heats water using the first heat source fluid that flows downstream of the second heat source fluid heater 21. The first heat source fluid discharged from the second heat source fluid heater 21 flows into the heater 31, and the temperature is lowered by heating the water in the heater 31. The first heat source fluid circulates between the first heat source fluid heater 1, the second heat source fluid heater 21, and the heater 31 via the first heat source fluid flow path 3.

  The temperature of the first heat source fluid at the inlet of the heater 31 of the eighth embodiment is often higher than the temperature of the second heat source fluid at the inlet of the heater 31 of the seventh embodiment. Therefore, according to the eighth embodiment, water can be easily heated to a higher temperature. On the other hand, according to the seventh embodiment, it is possible to use a larger proportion of the thermal energy for cold production by the cooling unit 4b.

(Ninth embodiment)
FIG. 9 is a schematic diagram showing the configuration of the cooling system of the ninth embodiment.

  As shown in FIG. 8, the heater 31 of the eighth embodiment heats water using the first heat source fluid that flows downstream of the second heat source fluid heater 21. On the other hand, the heater 31 of 9th Embodiment heats water using the 1st heat source fluid which flows upstream of the 2nd heat source fluid heater 21, as shown in FIG.

  In the present embodiment, the temperature of the first heat source fluid at the inlet of the heater 31 is higher than the temperature of the first heat source fluid at the inlet of the second heat source fluid heater 21. Therefore, according to this embodiment, it becomes easy to heat water to higher temperature. On the other hand, according to the eighth embodiment, it is possible to use a larger proportion of the thermal energy for cold production by the cooling unit 4b.

  FIG. 10 is a schematic diagram illustrating a configuration of a cooling system according to a modified example of the ninth embodiment.

  As shown in FIG. 7, the heater 31 of the seventh embodiment heats water using a second heat source fluid that flows downstream of the heat absorbing unit 4 a. On the other hand, the heater 31 of this modification heats water using the 2nd heat-source fluid which flows upstream of the heat absorption part 4a, as shown in FIG.

  In this modification, the temperature of the second heat source fluid at the inlet of the heater 31 is higher than the temperature of the second heat source fluid at the inlet of the heat absorbing unit 4a. Therefore, according to this modification, it becomes easy to heat water to a higher temperature. On the other hand, according to the seventh embodiment, it is possible to use a larger proportion of the thermal energy for cold production by the cooling unit 4b.

(10th Embodiment)
FIG. 11 is a schematic diagram showing the configuration of the cooling system of the tenth embodiment.

  The cooling system of FIG. 11 includes first and second heaters 31 a and 31 b instead of the heater 31. The first heater 31 a is provided in the first heat source fluid flow path 3. The second heater 31 b is provided in the second heat source fluid flow path 23. The 1st and 2nd heaters 31a and 31b heat the water of 1st temperature, and manufacture the water of the 2nd temperature used as warm water.

  The first heat source fluid is conveyed by the first heat source fluid pump 2 via the first heat source fluid flow path 3 and heated by the first heat source fluid heater 1. The first heat source fluid discharged from the first heat source fluid heater 1 flows into the second heat source fluid heater 21 and heats the second heat source fluid in the second heat source fluid heater 21 to increase the temperature. descend.

  The second heat source fluid is transported by the second heat source fluid pump 22 via the second heat source fluid flow path 23 and heated by the second heat source fluid heater 21. The 2nd heat source fluid discharged | emitted from the 2nd heat source fluid heater 21 flows in into the heat absorption part 4a, and temperature falls by heating the heat absorption part 4a.

  The refrigerator 4 includes a heat absorption part 4 a, a cooling part 4 b, and a heat radiation part 4 c, and has a refrigerant in the refrigerator 4. The cooling unit 4b cools the fluid to be cooled by the heat of vaporization of the refrigerant. When the refrigerator 4 is an absorption type, the heat absorption unit 4a heats the absorption liquid that has absorbed the refrigerant with the second heat source fluid to vaporize the refrigerant, and the heat dissipation unit 4c uses the cooling water to convert the refrigerant vaporized from the absorption liquid with cooling water. Cool to liquefy the refrigerant. On the other hand, when the refrigerator 4 is an adsorption type, the heat absorption part 4a heats the adsorbent adsorbing the refrigerant by the second heat source fluid to desorb the refrigerant from the adsorbent, and the heat radiating part 4c removes the adsorbent. Cooling with cooling water causes the adsorbent to adsorb the refrigerant. The cooling unit 4b cools the fluid to be cooled using the refrigerant from the heat radiating unit 4c.

  The to-be-cooled fluid is conveyed by the to-be-cooled fluid pump 5 via the to-be-cooled fluid flow path 6, and is cooled by the cooling unit 4b. The fluid to be cooled discharged from the cooling unit 4b flows into the cooling load 7 and the temperature rises by cooling the cooling load 7.

  Cooling water is conveyed through the water flow path 34 by the water pump 33, and the temperature rises by cooling the heat radiation part 4c. This water discharged from the heat radiating part 4c is conveyed through the water flow path 34 and supplied to the second heater 31b. The temperature of the water at the entrance of the heat radiating part 4c is, for example, 15 ° C. The temperature of water at the outlet of the heat radiating part 4c is, for example, 30 ° C. 30 ° C. is an example of the first temperature.

  The second heater 31b heats water from the water flow path 34 using the second heat source fluid. The water heated by the second heater 31b is conveyed through the water flow path 34 and supplied to the first heater 31a. The 1st heater 31a heats the water which flows downstream of the 2nd heater 31b using the 1st heat source fluid, and manufactures the water used as warm water. The temperature of this hot water is 60 ° C., for example. 60 ° C. is an example of the second temperature. The hot water is conveyed through the water flow path 34 and stored in the hot water tank 32.

  The first heater 31a of the present embodiment heats water using the first heat source fluid that flows downstream of the second heat source fluid heater 21. The 1st heat source fluid discharged | emitted from the 2nd heat source fluid heater 21 flows in into the 1st heater 31a, and temperature falls by heating the water in the 1st heater 31a. The first heat source fluid circulates between the first heat source fluid heater 1, the second heat source fluid heater 21, and the first heater 31a via the first heat source fluid flow path 3.

  Moreover, the 2nd heater 31b of this embodiment heats water using the 2nd heat-source fluid which flows downstream of the heat absorption part 4a. The second heat source fluid discharged from the heat absorption part 4a flows into the second heater 31b, and the temperature is lowered by heating the water in the second heater 31b. The second heat source fluid circulates between the second heat source fluid heater 21, the heat absorption unit 4a, and the second heater 31b via the second heat source fluid flow path 23.

  In the present embodiment, the first heater 31a is heated by the second heater 31b and heats the water flowing out of the second heater 31b. However, the second heater 31b is heated by the first heater 31a. In addition, the configuration may be such that the water flowing out of the first heater 31a is heated. When the temperature of the first heat source fluid at the outlet of the first heater 31a is lower than the temperature of the second heat source fluid at the inlet of the second heater 31b, the first heater 31a is placed downstream of the second heater 31b. It is desirable to arrange. Moreover, in this embodiment, although the 1st and 2nd heater 31a, 31b is arrange | positioned in series with respect to the flow of water, the 1st and 2nd heater 31a, 31b is parallel to the flow of water. May be arranged.

  FIG. 12 is a schematic diagram illustrating a configuration of a cooling system according to a modification of the tenth embodiment.

  As shown in FIG. 11, the first heater 31 a of the tenth embodiment heats water using the first heat source fluid that flows downstream of the second heat source fluid heater 21. On the other hand, the 1st heater 31a of this modification heats water using the 1st heat source fluid which flows upstream of the 2nd heat source fluid heater 21, as shown in FIG.

  Moreover, the 2nd heater 31b of 10th Embodiment heats water using the 2nd heat-source fluid which flows downstream of the heat absorption part 4a, as shown in FIG. On the other hand, the 1st heater 31a of this modification heats water using the 2nd heat-source fluid which flows upstream of the heat absorption part 4a, as shown in FIG.

  Thus, the 1st heater 31a may be arrange | positioned downstream of the 2nd heat source fluid heater 21, and may be arrange | positioned upstream of the 2nd heat source fluid heater 21. FIG. Similarly, the 2nd heater 31b may be arrange | positioned downstream of the heat absorption part 4a, and may be arrange | positioned upstream of the heat absorption part 4a. Further, one of the first and second heaters 31a and 31b may be arranged as shown in FIG. 11, and the other of the first and second heaters 31a and 31b may be arranged as shown in FIG.

  In the present modification, the first heater 31a heats the water flowing downstream of the second heater 31b, but the second heater 31b may heat the water flowing downstream of the first heater 31a. . Moreover, in this modification, although the 1st and 2nd heater 31a, 31b is arrange | positioned in series with respect to the flow of water, the 1st and 2nd heater 31a, 31b is parallel to the flow of water. May be arranged.

  As described above, the cooling system of the present embodiment includes the first and second heaters 31 a and 31 b instead of the heater 31. When such a configuration is adopted, the number of heat exchangers in the cooling system increases, but the temperature difference between the heated fluid and the heated fluid can be designed small. Specifically, the temperature difference between the first heat source fluid and the second heat source fluid can be designed to be small. Therefore, according to this embodiment, it becomes easy to heat water to higher temperature.

  Although several embodiments have been described above, these embodiments are presented only as examples, and are not intended to limit the scope of the invention. The novel systems and methods described herein can be implemented in various other forms. In addition, various omissions, substitutions, and changes can be made to the system and method embodiments described in the present specification without departing from the scope of the invention. The appended claims and their equivalents are intended to include such forms and modifications as fall within the scope and spirit of the invention.

1: heat source fluid heater, 2: heat source fluid pump, 3: heat source fluid flow path, 3a: valve,
4: refrigerator, 4a: heat absorption part, 4b: cooling part, 4c: heat radiation part,
4d ₁ : evaporator, 4d ₂ : condenser, 4d ₃ : absorber, 4d ₄ : regenerator,
4e ₁ : evaporator, 4e ₂ : condenser, 4e ₃ : first heat exchanger, 4e ₄ : second heat exchanger,
4e ₅ : 1st inlet valve, 4e ₆ : 2nd inlet valve,
4e ₇ : 1st outlet valve, 4e ₈ : 2nd outlet valve, 4e ₉ : Refrigerant pump,
5: Cooled fluid pump, 6: Cooled fluid flow path, 7: Cooling load, 10: Earth,
11: Cooling water pump, 12: Cooling water flow path, 12a: Valve, 13: Cooling tower,
14: Blower, 15: Air introduction part,
21: Heat source fluid heater, 22: Heat source fluid pump, 23: Heat source fluid flow path,
31: heater, 31a: first heater, 31b: second heater, 32: hot water tank,
33: Water pump, 34: Water flow path, 35: First branch flow path, 36: Second branch flow path,
37: heat utilization destination, 38: circulating water flow path,
41, 42, 43: valve, 44: first bypass flow path,
45, 46, 47: valve, 48: second bypass flow path,
51, 52, 53, 54: Valve

Claims (15)

A cooling unit for cooling the fluid to be cooled;
An endothermic part that absorbs the heat of the first heat source fluid or absorbs the heat of the second heat source fluid heated by the heat of the first heat source fluid;
A heat dissipating part for dissipating heat received from the fluid to be cooled and heat absorbed by the heat absorbing part;
An exhaust heat recovery system for recovering the exhaust heat of an absorption or adsorption refrigeration machine comprising:
Water is supplied to the heat radiating portion, and the heat received from the cooled fluid and the heat absorbed by the heat absorbing portion are radiated to the water in the heat radiating portion, and the first temperature discharged from the heat radiating portion. A water flow path for carrying the water;
A heater that heats the water from the water flow path using the first or second heat source fluid to produce the water at a second temperature used as hot water;
An exhaust heat recovery system characterized by comprising:   The exhaust heat recovery system according to claim 1, wherein the heater heats the water using the first or second heat source fluid downstream of the heat absorption unit.   The exhaust heat recovery system according to claim 1, wherein the heater heats the water using the first or second heat source fluid upstream of the heat absorption unit.   The flow path of the first or second heat source fluid is branched into a first branch flow path provided with the heat absorption part and a second branch flow path provided with the heater. The exhaust heat recovery system according to claim 1.   The exhaust heat recovery according to claim 4, comprising at least one of a first valve provided in the first branch flow path and a second valve provided in the second branch flow path. system.   The flow path of the first or second heat source fluid includes a first bypass flow path that bypasses the first flow path provided with the heat absorption part, and a second bypass that bypasses the second flow path provided with the heater. The exhaust heat recovery system according to claim 1, further comprising at least one of bypass channels. The refrigerator is provided in a cooling system including a heat source fluid heater that heats the second heat source fluid by heat of the first heat source fluid,
The exhaust heat recovery system according to claim 1, wherein the heater heats the water using the first heat source fluid downstream of the heat source fluid heater. The refrigerator is provided in a cooling system including a heat source fluid heater that heats the second heat source fluid by heat of the first heat source fluid,
The exhaust heat recovery system according to claim 1, wherein the heater heats the water using the first heat source fluid upstream of the heat source fluid heater.   The exhaust heat recovery system according to any one of claims 1 to 8, wherein the water channel circulates the water between the heater and the heat radiating unit.   The heater includes a first heater that heats the water by the heat of the first heat source fluid, and a second heater that heats the water by the heat of the second heat source fluid. The exhaust heat recovery system according to any one of claims 1 to 9.   One of the first and second heaters is heated by the other of the first and second heaters to heat the water flowing out of the other of the first and second heaters. The exhaust heat recovery system according to claim 10.   The exhaust heat recovery system according to any one of claims 1 to 11, wherein a maximum temperature of the first or second heat source fluid is 200 ° C or less.   13. The fluid according to claim 1, wherein the first heat source fluid is a hot water or a fluid heated in a heat source fluid heater that acquires heat from a heat source of non-fossil fuel. The exhaust heat recovery system described in 1. A cooling unit for cooling the fluid to be cooled;
An endothermic part that absorbs the heat of the first heat source fluid or absorbs the heat of the second heat source fluid heated by the heat of the first heat source fluid;
A heat dissipating part for dissipating heat received from the fluid to be cooled and heat absorbed by the heat absorbing part;
An exhaust heat recovery method for recovering the exhaust heat of an absorption or adsorption refrigeration machine comprising:
Supplying water to the heat dissipating part,
The heat received from the fluid to be cooled and the heat absorbed by the heat absorbing part are radiated to the water in the heat radiating part,
Conveying the water at the first temperature discharged from the heat radiating section to a heater,
Heating the water conveyed from the heat radiating unit by the heater using the first or second heat source fluid to produce water at a second temperature used as hot water;
An exhaust heat recovery method characterized by comprising: A cooling unit for cooling the fluid to be cooled;
An endothermic part that absorbs the heat of the first heat source fluid, or an endothermic part that absorbs the heat of the second heat source fluid heated by the heat of the first heat source fluid; and an endothermic part that absorbs heat from the fluid to be cooled and the endothermic part Heat radiating part that dissipates the generated heat,
An absorption-type or adsorption-type refrigerator comprising:
Water is supplied to the heat radiating portion, and the heat received from the cooled fluid and the heat absorbed by the heat absorbing portion are radiated to the water in the heat radiating portion, and the first temperature discharged from the heat radiating portion. A water flow path for carrying the water;
A heater that heats the water from the water flow path using the first or second heat source fluid to produce the water at a second temperature used as hot water;
The cooling system characterized by comprising.

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