JP2012211715A - Air-conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioning system capable of enhancing cooling ability especially during cooling operation even while maintaining safety with a relatively simple constitution.SOLUTION: The air-conditioning system has a desiccant rotor 40 comprising a rotating air permeable moisture absorbing body 40c, adsorbing moisture of treating air A1 flowing through a moisture absorbing part 40a, and releasing the adsorbed moisture to regeneration air A2 flowing through a regenerating section 40b and a desiccant air-conditioning unit having a humidifier 42 humidifying the treating air A1 having passed through the moisture absorbing body 40c of the desiccant rotor 40, and further has a thermal medium cooling heat exchanger 24 capable of exchanging heat with a thermal medium M flowing between a condenser 12 and an expansion valve 13 of a thermal medium circulation circuit L by the treating air A1 humidified in the humidifier 42 after having passed through the moisture absorbing the part 40a of the desiccant rotor 40, and is constituted so as to be able to regenerate the regenerating section 40b of the desiccant rotor 40 by the exhaust heat of an engine 21.

Description

  The present invention includes a compressor driven by an engine to compress a heat medium, a condenser that dissipates heat from the heat medium, an expansion valve that expands the heat medium, an evaporator that absorbs heat to the heat medium, the compressor, A heat medium circulation circuit that circulates the heat medium in the order of description in the condenser, the expansion valve, and the evaporator, and air-conditioning air that is heat-exchanged with the heat medium that flows through the condenser or the evaporator The present invention relates to an air conditioning system including an engine-driven heat pump device that supplies air to a space.

Conventionally, for example, a compressor driven by an engine to compress a heat medium, a condenser that radiates heat from the heat medium, an expansion valve that expands the heat medium, and an evaporator that absorbs heat to the heat medium are circulated in that order. There is a GHP (gas engine driven heat pump device: a heat pump device that uses a gas engine as a drive source) provided with a heat medium circulation circuit. And in such GHP, especially at the time of cooling operation in the summer, a sprayer that sprays water on the fin coil of the condenser as an outdoor unit is provided, and heat radiation from the heat medium flowing through the condenser is promoted. Thus, a technology for suppressing power consumption of the compressor and realizing energy saving is known (see Non-Patent Document 1).
In this technique, for example, the heat medium is R410A, the indoor cooling heat load is unchanged, the pressure of water sprayed on the fin coil of the condenser as the outdoor unit is 0.2 MpaG, and the sprayed water is Assuming that all vaporize in the fin coil of the condenser, theoretically, power consumption can be reduced by about 20%. However, in practice, not all of the water sprayed on the fin coil of the evaporator will evaporate. Therefore, in fact, in order to reduce power consumption by 20% as described above, when continuous spraying is performed, it is necessary to spray as much water as 15 times the theoretical spray amount. Therefore, the technique of Non-Patent Document 1 employs a configuration in which water is intermittently sprayed in order to efficiently evaporate water with the fin coil of the evaporator as an outdoor unit, and the spray amount of water is reduced to 1/5. It is suppressed to about 1/10.
On the other hand, especially during the cooling operation of the heat medium, in order to effectively use the exhaust heat of the gas engine discharged to the atmosphere by the radiator with GHP, the exhaust heat is led to an absorption refrigerator or adsorption refrigerator to generate cold heat. In addition, there is known a technique for using the cooling energy for cooling operation (see Patent Documents 1 and 2).

Refrigeration-Vol. 73, No. 850 Introduction of new technologies, new products and new equipment pp. 47-53: Energy-saving device by spraying water on air-cooled outdoor unit Japanese Patent Laid-Open No. 11-223412 JP 2010-175091 A

In the technique disclosed in Non-Patent Document 1, if the relative humidity of the outside air increases, the amount of water sprayed on the fin coil of the evaporator decreases, and the heat medium flowing through the evaporator by spraying is reduced. There is a problem that the temperature cannot be reduced effectively.
On the other hand, in the absorption refrigerating machine or the adsorption refrigerating machine that absorbs the exhaust heat of GHP shown in Patent Documents 1 and 2, for example, a water / LiBr absorption refrigerating machine or an adsorption refrigerating machine using a water refrigerant is used. In this case, it is necessary to adopt a configuration for holding a vacuum, and there is a problem that the configuration becomes complicated.
Further, in the techniques of Patent Documents 1 and 2, in the ammonia / water absorption refrigerator, there is a problem that when ammonia as a heat medium leaks, the human body may be adversely affected.

  The present invention has been made in view of the above-described problems, and an object thereof is an air conditioning system capable of improving the cooling capacity particularly during cooling operation while maintaining safety with a relatively simple configuration. Is to provide.

In order to achieve the above object, the air conditioning system of the present invention comprises:
A compressor driven by the engine to compress the heat medium; a condenser for releasing heat from the heat medium; an expansion valve for expanding the heat medium; an evaporator for absorbing heat to the heat medium; the compressor; the condenser; The expansion valve and the evaporator include a heat medium circulation circuit that circulates the heat medium in the order of description, and supplies the air for air conditioning exchanged with the condenser or the heat medium flowing through the evaporator to the air-conditioning target space. An air conditioning system equipped with an engine-driven heat pump device,
A desiccant rotor that is composed of a breathable hygroscopic body that rotates and adsorbs moisture in the processing air that flows through the hygroscopic part, and that releases the adsorbed water to the regeneration air that passes through the regenerating part, and the hygroscopic part of the desiccant rotor A desiccant air conditioner having a humidifier for humidifying the processing air that has passed through
Heat exchange can be performed between the processing air that has flowed through the moisture absorption part of the desiccant rotor and humidified by the humidifier, and the heat medium that flows between the condenser and the expansion valve of the heat medium circulation circuit. A heat medium cooling heat exchanger,
The breathable hygroscopic body can be regenerated in the regeneration portion of the desiccant rotor by exhaust heat of the engine.

According to the above characteristic configuration, in the desiccant air conditioner, the regeneration portion of the desiccant rotor can be appropriately regenerated by exhaust heat of the engine, so that the moisture absorption portion of the desiccant rotor can sufficiently dehumidify the air. In such a state, the processing air passes through the moisture absorption part of the desiccant rotor and is sufficiently dehumidified, and then is humidified by a humidifier and cooled in a form in which the latent heat of vaporization of some moisture due to the humidification is taken away, It is led to a heat medium cooling heat exchanger. Thereby, the heat medium flowing through the heat medium cooling heat exchanger is cooled by exchanging heat with the relatively low temperature processing air, and moisture contained in the processing air is evaporated in the heat medium cooling heat exchanger. Thus, the heat medium is cooled even in a form in which latent heat of vaporization is removed.
As a result, particularly when performing dehumidifying and cooling operation in summer, the heat medium circulating in the heat medium circulation circuit of the engine-driven heat pump device is compressed by the compressor and becomes high temperature, and then the outside air is discharged by the condenser. The heat is condensed and dissipated in the form of heat exchange with the heat medium, heat exchanged with the processing air in the heat medium cooling heat exchanger and cooled in a form in which the latent heat of vaporization of the water is taken away, and the expansion valve expands to a sufficiently low temperature. After that, heat is exchanged with air for air conditioning in the evaporator.
That is, the air-conditioning air is guided to the air-conditioning target space in an appropriately cooled state by exchanging heat with the heat medium sufficiently cooled by the evaporator.
If the above configuration is adopted, it is not necessary to adopt a configuration for maintaining a vacuum as in the prior art, and the configuration can be simplified, and it is not necessary to use a heat medium such as ammonia, and safety is maintained. However, it is possible to provide an air conditioning system capable of improving the cooling capacity during the cooling operation in a form in which the heat medium is appropriately cooled with the processing air by the desiccant air conditioner.

Further features of the air conditioning system of the present invention are as follows:
The water | moisture content which humidifies process air in the said humidifier exists in the point which is the drain water which generate | occur | produces in the said evaporator.

According to the above characteristic configuration, a configuration is adopted in which water is separately supplied from the outside of the system by using drain water generated in the evaporator as moisture for humidifying the processing air in the humidifier of the desiccant air conditioner. Therefore, the configuration can be simplified.
Moreover, since it is not necessary to supply water from the outside, it can be set as the air conditioning system excellent also from the economical viewpoint.

Further features of the air conditioning system of the present invention are as follows:
An exhaust heat recovery heat exchanger for exchanging heat between the exhaust heat of the engine and an exhaust heat recovery medium, and regeneration air for exchanging heat between the regeneration air passed through the regeneration unit of the desiccant rotor and the exhaust heat recovery medium There is a heating heat exchanger and an exhaust heat recovery medium circulation circuit for circulating the exhaust heat recovery medium between the exhaust heat recovery heat exchanger and the regeneration air heating heat exchanger.

According to the above characteristic configuration, the exhaust heat recovery medium is circulated in the exhaust heat recovery medium circulation circuit that is circulated and connected to the exhaust heat recovery heat exchanger and the regenerative air heating heat exchanger, so that the engine is used in the exhaust heat recovery medium. It is possible to appropriately recover the exhaust heat and to regenerate the air for regeneration flowing through the regeneration portion of the desiccant rotor with the recovered exhaust heat.
As a result, the exhaust heat of the engine of the engine-driven heat pump device can be appropriately used for regeneration of the regeneration portion of the desiccant rotor of the desiccant air conditioner.

Further features of the air conditioning system of the present invention are as follows:
A processing air cooling heat exchanger for exchanging heat between the processing air that has passed through the moisture absorption part of the desiccant rotor and the regeneration air;
The regeneration air is heated by heat exchange with the treatment air in the treatment air cooling heat exchanger, heated by the heat exchange with the exhaust heat recovery medium in the regeneration air heating heat exchanger, and then the desiccant. It is in the point which is comprised so that it may be guide | induced to the said reproduction | regeneration part of a rotor.

  According to the above characteristic configuration, the regeneration air is heated by heat exchange with the processing air in the treatment air heat exchanger, and is heated by heat exchange with the exhaust heat recovery medium in the regeneration air heating heat exchanger, Since it is led to the regeneration part of the desiccant rotor as a sufficiently high temperature, the regeneration part can be well regenerated with the high-temperature regeneration air.

Further features of the air conditioning system of the present invention are as follows:
A processing air cooling heat exchanger that exchanges heat between the processing air that has passed through the moisture absorption part of the desiccant rotor and the outside air that has been humidified by a humidifier;
The regeneration air is configured to be guided to the regeneration unit of the desiccant rotor after being heated by heat exchange with the exhaust heat recovery medium in the regeneration air heating heat exchanger.

  According to the above characteristic configuration, in the processing air cooling heat exchanger, the processing air exchanges heat with the outside air humidified by the humidifier, so that the temperature of the processing air after leaving the processing air cooling heat exchanger is reduced. And the heat medium can be cooled well.

Further features of the air conditioning system of the present invention are as follows:
An indoor unit that exchanges heat between the heat medium and indoor air in a heat medium circulation circuit, an outdoor heat exchanger that exchanges heat between the heat medium and outdoor air, and the outdoor unit that functions as the evaporator A flow-through state for switching the flow state of the heat medium between a cooling operation state in which a condenser functions as the condenser and a heating operation state in which the indoor unit functions as the condenser and the outdoor heat exchanger functions as the evaporator It is in the point provided with the switching means.

  According to the above characteristic configuration, the flow state switching means has a relatively simple configuration in which the flow state of the heat medium flowing through the heat medium circulation circuit is switched between the cooling operation state and the heating operation state. It is possible to appropriately switch between the cooling operation and the heating operation.

Further features of the air conditioning system of the present invention are as follows:
In the state where the flow state switching means is switched to the heating operation state, heat exchange can be performed between the heat medium flowing between the evaporator and the compressor of the heat medium circulation circuit and the exhaust heat recovery medium. Equipped with a simple heat medium heating heat exchanger,
The exhaust heat recovery medium circulation circuit includes a first circuit for circulating an exhaust heat recovery medium between the exhaust heat recovery heat exchanger and the regeneration air heating heat exchanger, the exhaust heat recovery heat exchanger, A circulation circuit switching means for switching between the second circuit for circulating the exhaust heat recovery medium with the heat medium heating heat exchanger is provided.

According to the above characteristic configuration, for example, when the flow state switching means is switched to the cooling operation state, the circulation circuit switching means switches to the first circuit, and the exhaust heat recovery heat exchanger and the regeneration air heating heat are switched. The exhaust heat recovery medium is circulated with the exchanger, and the exhaust heat of the engine is used for the regeneration portion of the desiccant rotor, so that the cooling capacity can be improved.
On the other hand, in a state where the flow state switching means is switched to the heating operation state, the circulation circuit switching means switches to the second circuit, and exhaust heat is exhausted between the exhaust heat recovery heat exchanger and the heat medium heating heat exchanger. By circulating the recovery medium, the heat medium can be appropriately heated by the exhaust heat of the engine, and the heating capacity can be improved.

It is a schematic block diagram which shows the circuit at the time of the air_conditionaing | cooling operation state of 1st Embodiment. It is an air diagram which shows the state of the air which flows through the circuit at the time of the cooling operation state of 1st Embodiment. It is a table | surface which shows the state value of the air which flows through the circuit at the time of the cooling operation state of 1st Embodiment. It is a schematic block diagram which shows the circuit at the time of the heating operation state of 1st Embodiment. It is a table | surface which shows the performance of 1st Embodiment and a prior art. It is PH diagram which showed the refrigerating cycle of 1st Embodiment and a prior art. It is a schematic block diagram which shows the circuit at the time of the air_conditionaing | cooling operation state of 2nd Embodiment. It is an air diagram which shows the state of the air which flows through the circuit at the time of the cooling operation state of 2nd Embodiment. It is a table | surface which shows the state value of the air which flows through the circuit at the time of the cooling operation state of 2nd Embodiment.

[First Embodiment]
The present invention uses exhaust heat of an engine, which is a drive source of an engine-driven heat pump device, for regeneration of a desiccant rotor of a desiccant air conditioner, and uses an engine-driven heat pump device with treated air A1 processed by the desiccant air conditioner. The heat medium M is cooled to improve the cooling performance especially in summer.
Therefore, in the following, after describing the configuration of the engine-driven heat pump device and the configuration of the desiccant air conditioner, the characteristic configuration of the present invention will be described.

[Engine-driven heat pump device]
As shown in FIGS. 1 and 4, the engine-driven heat pump device includes a compressor 11 that is driven by an engine 21 to compress the heat medium M, a condenser 12 that condenses the heat medium M to release heat, and a heat medium M. The expansion valve 13 that expands the heat medium, the evaporator 14 that evaporates the heat medium M and absorbs heat, the compressor 11, the condenser 12, the expansion valve 13 and the evaporator 14 circulate the heat medium M in the order described. Circuit L.

The heat medium circulation circuit L includes an indoor unit 50 that can exchange heat between the heat medium M and indoor air, an outdoor heat exchanger 51 that can exchange heat between the heat medium M and outdoor air, and an indoor unit. The cooling operation state (state shown in FIG. 1) in which 50 functions as the evaporator 14 and the outdoor heat exchanger 51 functions as the condenser 12, and the indoor unit 50 functions as the condenser 12, and the outdoor heat exchanger 51 serves as the evaporator 14. A four-way valve 15 (an example of a circulation circuit switching unit) that switches between the heating operation state (the state shown in FIG. 4) that functions as the above is provided.
The four-way valve 15 is controlled by a control device (not shown) in the heat medium circulation circuit L between the flow path between the compressor 11 and the indoor unit 50 and between the outdoor heat exchanger 51 and the compressor 11. By switching the connection state in the flow path, the cooling operation state and the heating operation state are switched.

The heat medium circulation circuit L is used for outdoor heat exchange for blowing outdoor air to the fin coil 51a for increasing the heat exchange efficiency between the heat medium M provided in the outdoor heat exchanger 51 and the outdoor air. A fan 51b is provided.
The compressor 11, the condenser 12, the outdoor heat exchanger 51, the expansion valve 13, the four-way valve 15, and the engine 21 are provided inside the outdoor unit 52.

  Furthermore, in the present invention, the exhaust heat of the engine 21 of the engine-driven heat pump device is configured so that the desiccant rotor 40 of the desiccant air conditioner shown below can be used for regeneration, and is processed by the desiccant air conditioner shown below. The heat medium M flowing through the heat medium circuit L of the engine-driven heat pump device is cooled by the treated air A1.

[Desicant air conditioner]
The desiccant air conditioner works when the engine-driven heat pump device is in a cooling operation state. At this time, the indoor unit 50 functions as the evaporator 14, and the outdoor heat exchanger 51 functions as the condenser 12.
In such a state, the desiccant air conditioner is composed of a breathable hygroscopic body 40c that rotates and adsorbs moisture of the processing air A1 that flows through the moisture absorbing section 40a, and also reproduces air A2 that allows moisture to flow through the regeneration section 40b. , A processing air cooling heat exchanger 41 that cools the processing air A1 that has passed through the moisture absorbing portion 40a of the desiccant rotor 40 by heat exchange with outdoor air, and a processing air cooling heat exchanger 41. The first humidifier 42 (an example of a humidifier) that humidifies the processing air A1 cooled in step 1, the processing air A1 that flows through the first humidifier 42, and the heat medium M that has passed through the outdoor heat exchanger 51. And a heat medium cooling heat exchanger 43 for exchanging heat with each other.
Further, in the desiccant air conditioner, the process air A1 is passed through the desiccant rotor 40 in the order of description of the moisture absorption part 40a, the process air cooling heat exchanger 41, the first humidifier 42, and the heat medium cooling heat exchanger 43. One fan 44 is provided on the downstream side of the moisture absorption part 40a of the desiccant rotor 40 in the flow direction of the processing air A1 and on the upstream side of the processing air cooling heat exchanger 41.
Further, the second fan 45 for allowing the regeneration air, which is the outdoor air, to flow in the order of the description of the processing air cooling heat exchanger 41 and the regeneration portion 40b of the desiccant rotor 40, is the desiccant rotor in the flow direction of the regeneration air A2. 40 on the downstream side of the reproduction unit 40b.
With the above configuration, the processing air A1 is dehumidified by the moisture absorption part 40a of the desiccant rotor 40, cooled by the processing air cooling heat exchanger 41, and then passed through the first humidifier 42 to thereby provide the humidification. The water is cooled in such a manner that the latent heat of vaporization of the water is taken away, and is also introduced to the heat medium cooling heat exchanger 43 in a state of sufficiently containing the moisture due to the humidification. As a result, the heat medium M flowing through the heat medium cooling heat exchanger 43 is cooled by the appropriately cooled processing air A1 and takes away the latent heat of evaporation of moisture contained in the processing air A1 from the heat medium M. Can also be cooled.
As described above, the cooling medium is cooled by the processing air A1 to improve the cooling performance.

Further, in the present invention, the exhaust heat recovery heat exchanger 22 for exchanging heat between the exhaust heat of the engine 21 and the exhaust heat recovery medium E in order to use the exhaust heat of the engine 21 for regeneration of the desiccant rotor 40, and the exhaust heat recovery medium Between the regeneration air heating heat exchanger 24 for exchanging heat between E and the regeneration air A2 guided to the regeneration portion 40b of the desiccant rotor 40, and the exhaust heat recovery heat exchanger 22 and the regeneration air heating heat exchanger 24. The exhaust heat recovery medium circulation circuit C that can circulate the exhaust heat recovery medium E and the circulation pump 26 that pumps the exhaust heat recovery medium E by the exhaust heat recovery medium circulation circuit C are provided.
The exhaust heat recovery medium E circulates in the exhaust heat recovery medium circulation circuit C, recovers the exhaust heat of the engine 21 by the exhaust heat recovery heat exchanger 22, and then regenerates by the regeneration air heating heat exchanger 24. Heat is exchanged with the air A2, and the regeneration air A2 is heated.

The regeneration air heating heat exchanger 24 is provided downstream of the processing air cooling heat exchanger 41 and upstream of the regeneration unit 40 b of the desiccant rotor 40.
The regeneration air A2 is heated by exchanging heat with the treatment air A1 in the treatment air cooling heat exchanger 41 and heated by exchanging heat with the exhaust heat recovery medium E in the regeneration air heating heat exchanger 24. Then, the air is guided to the regenerating unit 40b of the desiccant rotor 40, and the regenerating unit 40b regenerates the breathable moisture absorber 40c.
Thereby, the reproduction | regeneration capability of the desiccant rotor 40 is improved, As a result, the moisture absorption performance of the moisture absorption part 40a of the desiccant rotor 40 is aimed at.

  Further, in the cooling operation state, the processing air A1 after heat exchange with the heat medium M in the regeneration air heating heat exchanger 24 has a slightly lower temperature than the outdoor air. Therefore, although illustration is omitted, in the cooling operation state, the processing air A1 after flowing through the regeneration air heating heat exchanger 24 is mixed with outdoor air in the outdoor heat exchanger 51 that functions as the condenser 12. The structure supplied in a state can be adopted.

The desiccant air conditioner operates when the engine-driven heat pump device is in a cooling operation state (the state shown in FIG. 1), and is in a stopped state when it is in a heating operation state (the state shown in FIG. 4). is there. Therefore, in the present invention, the exhaust heat of the engine 21 is used for regeneration of the regeneration unit 40b of the desiccant rotor 40 of the desiccant air conditioner in the cooling operation state and in the heating operation state. In this case, the exhaust heat of the engine 21 is used to heat the heat medium M circulating in the heat medium circuit L.
Specifically, a heat medium heating heat exchanger 23 for exchanging heat between the heat medium M flowing between the indoor unit 50 functioning as the condenser 12 and the compressor 11 and the heat recovery medium E is provided. A first circuit C1 (a circuit indicated by a solid line in FIG. 1) for circulating the exhaust heat recovery medium E between the heat recovery heat exchanger 22 and the regeneration air heating heat exchanger 24, and an exhaust heat recovery heat exchanger 22 Switching circuit for switching between a second circuit C2 (a circuit indicated by a solid line in FIG. 4) for circulating the exhaust heat recovery medium E between the first circuit C1 and the second circuit C2 25 (an example of a circulation circuit switching means).
The switching valve 25 switches the exhaust heat recovery medium circulation circuit C to the first circuit C1 in the cooling operation state by switching control by a control device (not shown), and recovers the exhaust heat recovery medium E to the exhaust heat. Circulation is performed between the heat exchanger 22 and the regeneration air heating heat exchanger 24, and the regeneration air A2 is heated by the exhaust heat of the engine 21 (a state indicated by a solid line in FIG. 1). On the other hand, in the heating operation state, the exhaust heat recovery medium circulation circuit C is switched to the second circuit C2, and the exhaust heat recovery medium E is disposed between the exhaust heat recovery heat exchanger 22 and the heat medium heating heat exchanger 23. And the heat medium M is heated by the exhaust heat of the engine 21 (a state indicated by a solid line in FIG. 4).
The first circuit C1 has fins 53a for promoting the heat dissipation of the exhaust heat recovery medium E guided from the heat medium heating heat exchanger 23 to the exhaust heat recovery heat exchanger 22, and outdoor air is guided to the fins 53a. A radiator 53 including a fan 53b is provided.

[Configuration of humidifier]
Although the 1st humidifier 42 is comprised so that the process air A1 led to the heat-medium cooling heat exchanger 43 may be directly sprayed and humidified, the sprayed water functions as the evaporator 14. The drain water of the indoor unit 50 to be used can be used.
Specifically, the drain water supply path 30 that supplies the drain water of the indoor unit 50 to the first humidifier 42, and the drain water pressure that pumps the drain water to the first humidifier 42 side in the drain water supply path 30. A feed pump 31 is provided. The drain water led to the first humidifier 42 in the drain water supply path 30 is configured to be able to humidify the processing air A1 in a form that is directly sprayed to the processing air A1 by continuous spraying or intermittent spraying.

[Changes in the state of the processing air A1 in the cooling operation state]
The air conditioning system of the present invention exhibits high cooling capacity in the cooling operation state. Therefore, the cooling performance of the air conditioning system of the present invention is evaluated by explaining changes in the state (temperature, absolute humidity, relative humidity) of the processing air A1 and the regeneration air A2 at the measurement points P1 to P10 in FIG. To do. Note that changes in the state (temperature, absolute humidity, relative humidity) of the processing air A1 and the regeneration air A2 at the measurement points P1 to P10 in FIG. 1 are shown in an air diagram in FIG. 2 and shown in FIG. Is shown. Note that the measurement point P11 is a state where the air at the measurement point P1 is humidified to a saturated state.
The state change of each medium when the compression power of the refrigerant is 12.4 kW and the flow rates of the processing air A1 and the regeneration air A2 are 700 m ³ / h is shown.
The temperature of the outdoor air (initial temperature of the processing air A1 and the regeneration air A2) is 35 ° C., and the relative humidity is 45%. The temperature of the exhaust heat recovery medium E is 92 ° C. at the inlet of the regeneration air heating heat exchanger 24 and 86 ° C. at the outlet of the radiator 53. The temperature of the drain water led to the first humidifier 42 is 16.7 ° C., and the flow rate is 30.6 kg / h.
Between P <b> 1 and P <b> 2, the processing air A <b> 1 is dehumidified by 9.3 g / kg dry air by flowing through the moisture absorption part 40 a of the desiccant rotor 40. Here, since the regeneration part 40b of the desiccant rotor 40 is appropriately regenerated by the regeneration air A2 heated by the exhaust heat of the engine 21, a sufficient dehumidifying ability is exhibited.
Between P2 and P4, the processing air A1 is cooled in a form in which heat is exchanged with the outdoor air OA by the processing air cooling heat exchanger 41, and the temperature is lowered by 20.9 ° C.
Between P4 and P5, the processing air A1 is cooled by 19.6 ° C. in a form in which water is sprayed and humidified by the first humidifier 42, and the latent heat of vaporization of moisture due to humidification is taken away. Since the processing air A1 guided to the first humidifier 42 has been sufficiently dehumidified by the moisture absorption part 40a, when humidified by the first humidifier 42, the moisture due to the humidification evaporates well. It is cooled.
Between P 5 and P 6, the processing air A 1 is heated by 12.5 ° C. in a form in which the heat medium M is cooled by exchanging heat with the heat medium M in the heat medium cooling heat exchanger 43. At this time, the processing air A1 is led to the heat medium cooling heat exchanger 43 in a state including water that cannot be evaporated, and the heat latent heat of heat is taken away by the heat medium cooling heat exchanger 43. The medium M is further cooled.
For example, in the heat medium cooling heat exchanger 43, the temperature of the heat medium M that decreases in a form in which the latent heat of vaporization of moisture is lost is 42 ° C. to 25.2 ° C.

  On the other hand, the regeneration air A2 is heated in a form in which heat is exchanged with the treatment air A1 in the treatment air cooling heat exchanger 41 between P1 and P7, and the temperature is raised by 21.5 ° C., between P7 and P8. , The heat is exchanged with the exhaust heat recovery medium E in the regeneration air heating heat exchanger 24, and the temperature is increased by 30.1 ° C. to 86.6 ° C., and the regeneration of the desiccant rotor 40 is performed between P8 and P9. Part 40b is reproduced. It can be seen that the desiccant rotor 40 is appropriately regenerated by the amount of 9.3 g / kg dry air when the regenerating unit 40b is regenerated by the very high temperature regenerating air A2 of 86.6 ° C.

  As described above, when the processing air A1 and the regeneration air A2 flow through the desiccant air conditioner, the temperature of the heat medium M can be reduced by 16.8 ° C. in calculation, and the cooling performance in summer is greatly improved. it can.

[Performance comparison between the present invention and the prior art]
Next, based on the table | surface shown in FIG. 5, the performance of this invention and a prior art is compared.
In the table shown in FIG. 5, the standard (heat pump device) is an outdoor heat exchanger 51 that functions as the condenser 12 when the conventional engine-driven heat pump device is used. In the case of directly spraying water on the surface, the present invention 1 (desiccant cooling) is the present invention 2 (desiccant cooling + process air cooling) when the heat medium M is cooled by the processing air A1 cooled by the desiccant air conditioner in the present invention. ) Shows the COP and the amount of water used in each of the cases where the processing medium A1 after cooling the heat medium M is guided to the condenser 12 to further cool the heat medium M.

As for COP, the conventional technique (the technique of Non-Patent Document 1), the present invention 1 (desiccant cooling), and the present invention 2 (desiccant cooling + process air cooling) are larger than the standard (heat pump device). It can be seen that it has improved.
On the other hand, the amount of water used is greatly reduced in both cases of the present invention 1 (desiccant cooling) and the present invention 2 (desiccant cooling + process air cooling) compared to the prior art (the technique of Non-Patent Document 1). is made of. The water amount (28 kg / h) of the present invention 1 and the present invention 2 can be reduced to about 1/10 of the water amount (245 kg / h) of the prior art. The amount of water (28 kg / h) of the present invention 1 and the present invention 2 is an amount that can be covered by the amount of drain water (30 kg / h) generated in the heat pump device.
That is, according to the present invention 1 and the present invention 2, it can be said that a very high COP can be exhibited with water within the range of the amount of drain water generated in the heat pump device.

Next, based on the PH diagram (pressure-enthalpy diagram) shown in FIG. 6, the performance of the present invention is compared with that of the prior art.
The PH diagram shown in FIG. 6 shows changes in the pressure and enthalpy of the heat medium M circulating in the refrigeration cycle, and the change between P1 and P2 corresponds to the change when flowing through the compressor 11, The change between P2 and P3 corresponds to the change when flowing through the condenser 12, the change between P3 and P4 corresponds to the change when flowing through the expansion valve 13, and the change between P4 and P1 is evaporation. This corresponds to the change when flowing through the vessel 14.
In addition, in this invention 1 and this invention 2, since the heat-medium cooling heat exchanger 43 is provided downstream of the outdoor heat exchanger 51 which functions as the condenser 12, the change between P2-P3 is This corresponds to a change when flowing through the condenser 12 and the heat medium cooling heat exchanger 43.
Here, focusing on the amount of enthalpy reduction between P2 and P3, the amount of enthalpy reduction (P2 _D1 -P3 _D1 , P2 _D2 -P3 _D2 ) of the present invention 1 and the present invention 2 is the amount of decrease in the reference enthalpy ( P2 _B -P3 has decreased as much E1 to changes) between _B, it can be seen that the reduction as much E2 against conventional reduction of the enthalpy of technology (P2 _S -P3 _S).
That is, in the present invention 1 and the present invention 2, the heat radiation of the heat medium M in the condenser 12 and the heat medium cooling heat exchanger 43 can be more radiated than the standard and the prior art, and the cooling capacity is improved accordingly. It can be said that.

[Second Embodiment]
In the first embodiment, while reducing the amount of processing air of the desiccant rotor 40 and reducing the size of the apparatus, the required power of the fan 44 and the fan 45 is reduced, and the power consumption of the desiccant rotor 40 is reduced. A configuration as shown in FIG. 7 can be employed. FIG. 8 shows an air diagram in the case where the configuration is adopted. FIG. 9 shows air state values when this configuration is adopted.
The compression power of the refrigerant is 12.4 kW, the flow rate of the processing air A1 and the regeneration air A2 passing through the desiccant rotor 40 is 560 m ³ / h, the flow rate of the outdoor air A3 is 280 m ³ / h, and the total flow rate is 1400 m ³ / H. In the first embodiment, the flow rates of the processing air A1 and the regeneration air A2 that pass through the desiccant rotor 40 are 700 m ³ / h, and the total flow rate is 1400 m ³ / h. That is, the total flow rate is equal, and the amount of air passing through the desiccant rotor 40 is reduced by about 20%.
In the air conditioning system according to the second embodiment, a fan 46 and a second humidifier 47 are newly provided, and the outdoor air A3 is humidified with the drain water of the evaporator 14 by the second humidifier 47 to about 25 ° C. It cools, it guides to the process air cooling heat exchanger 41 with the fan 46, and it is comprised so that the outdoor air A3 and process air A1 which were cooled to about 25 degreeC may be heat-exchanged. As a result, the temperature of the processing air A1 is cooled to 26.6 ° C. as indicated by a measurement point P4 in FIG.
Between P4 and P5, the processing air A1 is cooled by 10.8 ° C. in a form in which water is sprayed and humidified by the first humidifier 42, and the latent heat of vaporization of moisture due to humidification is taken away. Since the processing air A1 guided to the first humidifier 42 has been sufficiently dehumidified by the moisture absorption part 40a, when humidified by the first humidifier 42, the moisture due to the humidification evaporates well. It is cooled.
On the other hand, the regeneration air A2 as outdoor air passes through the breathable moisture absorber 40c of the regeneration portion 40b of the desiccant rotor 40 in a state heated to 86.6 ° C. by the regeneration air heating heat exchanger 24. It is regenerated and discharged to the outside by the fan 45.
As a result, the temperature of the heat medium M at the outlet of the heat medium cooling heat exchanger 43 is about 23.8 ° C., and the COP is 5.56. The amount of water in the first humidifier 42 was 16 kg / h, and the amount of water in the second humidifier 47 was 6 kg / h. The total amount of water is 22 kg / h, and the required amount of water in the first embodiment can be reduced by about 20%.
Thus, in the said 2nd Embodiment, the air quantity and required water quantity which pass a desiccant rotor can be reduced significantly, without reducing COP.
In the second embodiment, the fan 46 and the second humidifier 47 are provided. However, the drain water is directly guided to the fan 46 without providing the second humidifier 47. Thus, the outdoor air A3 may be humidified.

[Another embodiment]
The regeneration unit 40b of the desiccant rotor 40 in the desiccant air conditioner can be configured to use the exhaust heat of the exhaust gas of the engine 21 instead of the recovered heat of the engine coolant of the engine 21, or use both of them. You can also.

  The air-conditioning system of the present invention can be effectively used as an air-conditioning system capable of improving the cooling capacity particularly during cooling operation while maintaining safety with a relatively simple configuration.

M: Heat medium E: Waste heat recovery medium L: Heat medium circulation circuit L1: First circuit L2: Second circuit 11: Compressor 12: Condenser 13: Expansion valve 14: Evaporator 15: Four-way valve (flowing state) An example of switching means)
21: Engine 22: Waste heat recovery heat exchanger 23: Heat medium heating heat exchanger 24: Regenerative air heating heat exchanger 25: Switching valve (circulation circuit switching means)
27: Engine exhaust 40: Desiccant rotor 42: First humidifier 43: Heat medium cooling heat exchanger 50: Indoor unit 51: Outdoor heat exchanger 53; Radiator

Claims (7)

A compressor driven by the engine to compress the heat medium; a condenser for releasing heat from the heat medium; an expansion valve for expanding the heat medium; an evaporator for absorbing heat to the heat medium; the compressor; the condenser; The expansion valve and the evaporator include a heat medium circulation circuit that circulates the heat medium in the order of description, and supplies the air for air conditioning exchanged with the condenser or the heat medium flowing through the evaporator to the air-conditioning target space. An air conditioning system equipped with an engine-driven heat pump device,
A desiccant rotor that is composed of a breathable hygroscopic body that rotates and adsorbs moisture in the processing air that flows through the hygroscopic part, and that releases the adsorbed water to the regeneration air that passes through the regenerating part, and the hygroscopic part of the desiccant rotor A desiccant air conditioner having a humidifier for humidifying the processing air that has passed through
Heat exchange can be performed between the processing air that has flowed through the moisture absorption part of the desiccant rotor and humidified by the humidifier, and the heat medium that flows between the condenser and the expansion valve of the heat medium circulation circuit. A heat medium cooling heat exchanger,
An air conditioning system configured to regenerate the breathable moisture absorber in the regeneration unit of the desiccant rotor by exhaust heat of the engine.   The air conditioning system according to claim 1, wherein the moisture that humidifies the processing air by the humidifier is drain water generated by the evaporator.   An exhaust heat recovery heat exchanger for exchanging heat between the exhaust heat of the engine and an exhaust heat recovery medium, and regeneration air for exchanging heat between the regeneration air passed through the regeneration unit of the desiccant rotor and the exhaust heat recovery medium The exhaust heat recovery medium circulation circuit which circulates an exhaust heat recovery medium between a heating heat exchanger and the exhaust heat recovery heat exchanger and the regeneration air heating heat exchanger. Air conditioning system. A processing air cooling heat exchanger for exchanging heat between the processing air that has passed through the moisture absorption part of the desiccant rotor and the regeneration air;
The regeneration air is heated by heat exchange with the treatment air in the treatment air cooling heat exchanger, heated by the heat exchange with the exhaust heat recovery medium in the regeneration air heating heat exchanger, and then the desiccant. The air conditioning system according to claim 3, wherein the air conditioning system is configured to be guided to the regeneration unit of the rotor. A processing air cooling heat exchanger that exchanges heat between the processing air that has passed through the moisture absorption part of the desiccant rotor and the outside air that has been humidified by a humidifier;
The regeneration air is configured to be guided to the regeneration unit of the desiccant rotor after being heated by heat exchange with an exhaust heat recovery medium in the regeneration air heating heat exchanger. Air conditioning system.   An indoor unit that exchanges heat between the heat medium and indoor air in a heat medium circulation circuit, an outdoor heat exchanger that exchanges heat between the heat medium and outdoor air, and the outdoor unit that functions as the evaporator A flow-through state for switching the flow state of the heat medium between a cooling operation state in which a condenser functions as the condenser and a heating operation state in which the indoor unit functions as the condenser and the outdoor heat exchanger functions as the evaporator The air conditioning system according to any one of claims 1 to 5, further comprising a switching unit. In the state where the flow state switching means is switched to the heating operation state, heat exchange can be performed between the heat medium flowing between the evaporator and the compressor of the heat medium circulation circuit and the exhaust heat recovery medium. Equipped with a simple heat medium heating heat exchanger,
The exhaust heat recovery medium circulation circuit includes a first circuit for circulating an exhaust heat recovery medium between the exhaust heat recovery heat exchanger and the regeneration air heating heat exchanger, the exhaust heat recovery heat exchanger, The air conditioning system according to claim 6, further comprising a circulation circuit switching unit that switches between a second circuit that circulates the exhaust heat recovery medium with the heat medium heating heat exchanger.

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