JP3302859B2 - Method for forming refrigeration cycle of solar thermal adsorption regenerative refrigeration system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorption refrigeration apparatus which operates in a heat source temperature range lower than that of an adsorption refrigeration apparatus, and more particularly to a method for forming a refrigeration cycle of a solar heat adsorption refrigeration apparatus.

[0002]

2. Description of the Related Art In recent years, an adsorption refrigeration system which operates in a heat source temperature region (about 60 to 75 ° C.) lower than that of an absorption refrigeration system has been developed.

For example, an adsorbent, a heat transfer surface for heating and cooling the adsorbent, a refrigerant and a heat transfer surface for condensing and evaporating the refrigerant are housed in a vacuum vessel as a device capable of efficiently storing heat in a small space. A proposal regarding the adsorption type heat storage device described above is disclosed in Japanese Patent Application Laid-Open No. 3-91660.

[0004] Recently, as an improvement of the above invention, the cooling, heating and heat storage operations of the adsorption type heat storage device have been started.
Japanese Patent Application Laid-Open No. 5-272832 discloses a proposal in which the heat stored once can be easily held together with the stop.

In a test of a zeolite / water adsorption type refrigerating apparatus and a test of a regenerator (250 KWh), heating COP = (1.4) 1.3 at an extraction temperature of 60 ° C. (80 ° C.).
, And a test of a zeolite / water-based and activated carbon / methanol-based refrigeration system alone, and a cascade-type refrigeration system combining both systems were performed.
Assumed result of a frozen COP of 0.9 at 35 KW and an evaporation temperature of 2 ° C. was 0.9. In addition, in a test of a gas-fired adsorption refrigeration system using a zeolite / ammonia system, a heating COP =
1.6 and a frozen COP of 0.6 were obtained. Recently, it has been reported that an activated carbon / ammonia system was used as an adsorption system, and a refrigeration COP> 0.7 was obtained at a refrigeration capacity of 10 KW.

[0006] Adsorption refrigeration systems currently commercialized include an adsorption refrigeration system using a silica gel / water system and a refrigeration capacity of up to 100 RT using factory waste heat as a heat source, and a refrigeration capacity of 30 RT using a zeolite / water system. Adsorption refrigeration equipment.

[0007] On the other hand, the spread of cooling devices in recent years has been remarkable, and is one of the causes of power peaks that occur during the summer. From the viewpoint of power leveling, especially in Okinawa Prefecture, there are two peaks in power consumption over the day and night, and avoiding these peaks has become an important issue. That is, it is required that the cooling demand of 5 hours from 12:00 to 17:00 around the 15:00 level and 4 hours from 19:00 to 23:00 around 21:00 should be processed by another energy source without relying on electric power. ing.

[0008]

The only means currently in practical use to avoid the above-mentioned peak power consumption are pumped-storage power generation and regenerative air conditioning systems. The spread of regenerative air conditioning systems is important for electric power companies. It has become a challenge.

In addition, due to the emergence of environmental problems such as global warming and depletion of the ozone layer, the adsorptive refrigeration system has high pollution-free and high safety in addition to "defluorocarbon" and "decarbonation gas". Has attracted attention as a waste heat recovery system. On the other hand, a system using this energy as a driving source for cooling is considered to be effective in areas that are blessed with solar heat.In particular, using solar heat during the day, heat storage and cooling of houses using solid adsorbents are used to cut peak power during the day. There is a strong demand for the development of an adsorption-type regenerative cooler that contributes.

However, the conventional adsorption refrigeration system described above has a small coefficient of performance COP and is still thermally efficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and uses daytime solar heat to perform heat storage and cooling using a solid adsorbent, thereby contributing to a reduction in peak power and improving heat efficiency in other heat pumps and other refrigeration systems. It is an object of the present invention to provide a method for forming a refrigeration cycle of a solar-heat-adsorption-type regenerative refrigeration apparatus which is comparable to the apparatus.

[0012]

In order to achieve the above object, a regenerative cooling system using hot water of 60 ° C. or higher, specifically, hot water of about 75 ° C., obtained from a solar heat collecting section is used. Need to build. That is, it is necessary to establish a system for collecting and supplying solar thermal energy and to prepare means for preparing an adsorption-type thermal storage reactor having high thermal efficiency and high thermal storage density. Therefore, according to the present invention, a temperature swing (T) effectively utilizing hot water of 60 ° C. or higher prepared for efficiently collecting solar heat and heating the built-in adsorbent during regeneration is provided.
SA) and T using pressure swing method (PSA)
A refrigeration cycle with high heat storage efficiency is established by adopting a regeneration method based on the PSA method. At the time of adsorption, cooling water prepared to suppress heat generated by adsorption of refrigerant vapor is switched and supplied, and the flow rate is adjusted. Therefore, a thermal wave propagation method that can increase and decrease the refrigeration output more efficiently is adopted.

Further, by adopting a silica gel / water system, a relatively high cold heat storage density of 40 to 50 Kcal / Kg can be obtained. In addition, a regeneration state can be maintained in a connection path provided between the adsorption reactor and the evaporator by a heat storage steam valve that can be shut off except during the adsorption step. Thus, by closing the steam valve after the regeneration process until the process shifts to the adsorption process, the cooling operation can be performed without relying on electric power at the time of daytime or nighttime cooling demand.

That is, the present invention provides an adsorption reactor for charging and adsorbing a refrigerant by filling an adsorbent and a refrigerant vapor desorbed from the adsorbent by heating the adsorbent at the time of regeneration via a condenser. An adsorption-type heat storage refrigeration system comprising an evaporator that stores the liquid as a liquid and self-evaporates the refrigerant liquid at the time of adsorption, and a heat exchanger that forms a cold load against the cold generated by the self-evaporation of the refrigerant liquid. A solar heat collector for generating heated hot water for desorbing the refrigerant from the adsorbent incorporated in the reactor, a vacuum pump for exhausting the refrigerant vapor desorbed from the adsorbent, and a condenser for condensing the desorbed refrigerant vapor are provided. A regeneration step of regenerating the adsorbent by preferably changing the amount of hot water supplied from the heat collector to the reactor and the suction amount of the vacuum pump, preferably using a temperature swing and a pressure swing method together; A radiator or other heat exchange means for generating cooling water that suppresses heat generation of the adsorbent, and steam that is interposed between the adsorption reactor and the evaporator and induces a self-evaporation action in the refrigerant liquid in the evaporator during adsorption After the regeneration step, after maintaining the heat storage state by continuing the shut-off state of the steam valve, during the adsorption step, the steam valve is opened to guide the refrigerant vapor from the evaporator to the reactor side, An adsorption step of performing adsorption while suppressing heat generated by adsorption of steam with cooling water from a radiator or other heat exchange means,
A refrigeration cycle system is formed by alternately repeating the regeneration step and the adsorption step with the heat storage state interposed therebetween.

In this case, in order to prevent heat fluctuation of the solar heat,
The generation of the hot water for desorption is performed by an auxiliary heat source using waste heat or the like provided together with the solar heat collector or an electric heater used at night. Preferably, the adsorption reactor is provided with a plurality of units, and the regeneration step and the adsorption step are performed in parallel. The adsorbent /
The refrigerant system was composed of a silica gel / water system. Further, it is preferable that the evaporator performs showering from the spray nozzle to increase the evaporation area, thereby reducing the thickness of the evaporation layer so that a required evaporation rate can be obtained. It is preferable that the regeneration step and the adsorption step employ a thermal wave propagation method. As a result, in the present invention, after the end of the regeneration step, the steam valve is kept closed to store heat energy of the heat energy generated in the regeneration step, and then, at the time of peak power, the vapor valve is opened to perform the adsorption step. I can do things,
It effectively contributes to peak power cut.

[0016]

According to the above technical means, the refrigerating cycle is formed by the regeneration step and the adsorption step sandwiching the heat storage state, and the cooling using the regeneration by the TPSA method utilizing solar heat can be performed. That is, the regeneration step is performed during a time period when the cooling demand does not reach a peak, that is, the regeneration step is performed by changing the amount of hot water supplied to the reactor of the hot water of 60 ° C. or more obtained by the heat collector to the adsorbent. Regeneration temperature from 40 ° C to 60
Swing above ℃. Thus, the refrigerant vapor that has started to desorb from the built-in adsorbent, for example, as shown in FIG.
The temperature rises from Pe to Pg (heating step), and then the amount of suction of the vacuum pump is changed between Pg and 4.6 Torr (cooling step) to regenerate the reactor using both the temperature swing method and the pressure swing method. Then, the refrigerant vapor discharged from the reactor is stored as a refrigerant liquid in the evaporator via the condenser, and the TPSA regeneration using both the temperature swing and the pressure swing is performed. If the solar heat can be utilized abundantly as in the case of fine weather in summer, it is possible to increase the amount of the circulating refrigerant by regenerating the temperature to b 'and then regenerating to c' by decompression.

After the regeneration of the adsorbent is completed,
Until the power demand reaches a peak, the steam valve is kept closed to store renewable energy. Then, in order to perform the adsorption step at peak power demand, the steam valve is opened, and the heat generated by the adsorption of the refrigerant vapor from the heat storage vapor valve connecting the depressurized adsorption reactor and the evaporator storing the refrigerant liquid is radiator. If the adsorption is preferably performed by the thermal wave propagation method while holding the cooling water from other heat exchange means, the refrigerant liquid of the evaporator induces a self-evaporation action to generate cold heat, and the generated refrigerant vapor passes through the valve. The adsorbent is adsorbed by the cooling water through the cooling water. The refrigerant liquid (cold water) cooled by the cold heat is directly sent to the heat exchanger to perform cooling.

At this time, the heat of adsorption generated in the adsorbent is brought into contact with the adsorbent through a heat exchange coil in the reactor instead of the warm water via a radiator or other heat exchange means, and It is removed by cooling. The heat absorption / radiation of the adsorbent of the hot water or the cooling water is performed by a heat exchange coil circulating in the filled adsorbent or the adsorbent module, but is not limited thereto. (Hot water) may be performed by a jacket.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, unless otherwise specified, the dimensions, shapes, relative positions, and the like of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.
FIG. 1 is a schematic view of a solar-heat-adsorption type thermal storage refrigeration apparatus according to an embodiment of the present invention, and FIG. 2 is a graph showing a refrigeration cycle according to FIG.

As shown in FIG. 1, the present apparatus incorporates an adsorbent 11 for adsorbing and regenerating a refrigerant, and stores and adsorbs a refrigerant liquid 13 condensed via a condenser 19 during regeneration. Occasionally, the evaporator 12 induces self-evaporation in the refrigerant liquid 13, the refrigerant liquid 13 (cold water) cooled by cold generated by self-evaporation in the evaporator 12, the load pump 2
A main configuration is formed by the fan coil 15 which forms a cooling load for circulating by the cooling air 2 and performing cooling. The reaction vessel 10 includes a heat exchange coil 10a for circulating warm water (during regeneration) or cooling water to exchange heat with the adsorbent.

On the other hand, as a main configuration at the time of the regeneration step, a solar heat collector 16 for generating heated hot water and the heated hot water generated by the heat collector 16 are circulated through a heating coil 10 a in the reactor 10 to remove the adsorbent. Circulation pump 17 for heating and desorbing refrigerant
And a condenser 19 for sucking the desorbed refrigerant vapor through the vacuum pump 18 and condensing it by heat exchange with the cooling water, so that a temperature swing and a pressure swing described later are used in combination. The vacuum pump 18 is provided with a refrigerant (water).
In order to prevent oil mist from entering the inside, an oil-free pump, for example, a diaphragm pump is used. The circulation pump 17 controls the supply amount of the heated hot water supplied from the heat collector 16 based on the detection signal from the temperature detection sensor T provided in the pipe 28, and heats the heat via the heat exchange coil 10a. Heat exchange is performed between the hot water and the adsorbent so that the temperature of the adsorbent in the reactor 10 can be raised from 40 ° C. to 60 ° C. or more.

The main structure of the apparatus on the adsorption step side is that it operates during the adsorption step, and the circulating pump 17 adsorbs through the pipe 25 and the heat exchange coil 10a in order to suppress the heat generated by the adsorbent during the adsorption step. A radiator 21 for generating cooling water for cooling the agent, and an evaporator 12 and an adsorption reactor 10 are connected at the time of adsorption to form a refrigerant liquid 13 in the evaporator 12.
A steam valve 14 for inducing self-evaporation is provided, and after the regeneration step is completed, the heat storage state is maintained by continuing the shut-off state of the steam valve 14, and then the steam valve 14 is opened during the adsorption step to evaporate the refrigerant vapor. The adsorption is performed while the heat generated by the adsorption of the refrigerant vapor is suppressed by cooling water from a radiator or other heat exchange means. In addition, the control of taking out cold heat during the adsorption step is performed by a thermal wave propagation method, and the flow rate is adjusted by controlling the number of revolutions of the circulation pump 17.

On-off valves 26 and 27 are provided in a pipe 24, a pipe 27 connecting the collector 16 and the reactor 10, and a pipe 25 branching the pipe 27 and connecting the radiators, respectively.
During the regeneration step, the valve 26 is closed and the valve 27 on the heat collector 16 side is closed.
Is opened to supply heated hot water to the adsorbent via the pump 17, and the valve 27 is closed and the valve 26 is opened to suppress the heat generated by the adsorbent during the adsorption step.
The radiator 21 generates cooling water to be supplied to the adsorbent through the radiator 7. Reference numeral 30 denotes a valve for returning the cooling water cooled by the condenser 19 to the evaporator 12. The adsorption reactor 1
0 is waste heat or night power heater or other auxiliary heat source 2
9 is provided so that it can be used in combination with the heat collector 16 or in place of the heat collector 16 when heat collection by solar heat alone is difficult.

As shown in FIG. 4, the structure of the adsorption reactor 10 is such that an adsorption module 100 using silica gel is formed in a plate shape, and the plate module 100 is vertically erected in a state of being vertically erected. The pressure loss of the refrigerant is eliminated by arranging the five extended plate-shaped modules 100 in parallel in the reactor 10 with a predetermined gap therebetween.

A heat exchange coil 10a is wound around the module 100 so that hot water or cooling water from the solar heat collector 16 or the radiator can be brought into thermal contact with the adsorbent through the heat exchange coil 10a. Have been.
The heat exchange coil 10a is connected to the solar heat collector 16 or the pipes 28 and 25 on the radiator side via a pipe 24 via a branch pipe 24a so as to be wound around each module 100.

On the other hand, the refrigerant inlet 10b of the reactor 10 is opened on the short side wall in the direction in which the plate module 100 extends to facilitate the formation of a thermal wave and to form the evaporator 12 via the steam valve 14. Is connected to
(See FIG. 1) also the heat exchange coil 10a also provided the inlet side 10a ₁ into the reaction vessel upper surface side of the coolant inlet port 10b, a plate module 1
Turn 00 wound along the extending direction of the and the outlet side 10b ₁ is derived from the reaction vessel upper surface side of the coolant inlet port opposite, facilitated the formation of a thermal wave also thereby. The suction port 18a of the vacuum pump 18 is provided on the upper surface side of the reactor opposite to the inlet opening so that the refrigerant flows in the direction in which the plate module 100 extends, and an oil-free vacuum pump is used as the pump 14. Is good. As shown in FIG. 3, a temperature sensor T is linearly attached to the plate-shaped module 100 along the longitudinal direction to facilitate the detection of a thermal wave.

The condenser 19 employs a shell-and-tube type heat exchanger, and the evaporator 12 performs showering from the spray nozzle 13A to increase the evaporation area, reduce the thickness of the evaporation layer, and perform necessary evaporation. Speed was obtained.

As shown in FIG. 2, the refrigeration cycle according to this embodiment includes a regeneration step a → b heating step and b
→ The pressure reduction regeneration step of c. That is, in the regeneration step, the valve 26 is closed and the valve 27 on the side of the heat collector 16 is opened, and the adsorbent 11 is heated with the hot water of about 65 to 80 ° C. obtained from the solar heat collector 10 via the pump 17. The temperature of the adsorbent 11 is increased by 4 while the vapor pressure is increased from Pe to Pg while heating
After performing the heating step a → b of raising the temperature from 0 to 60 ° C. or more, the adsorbent 11 is suctioned by the vacuum pump 18 while maintaining the temperature of the adsorbent 11 at 60 ° C. or more by controlling the rotation speed of the pump 17, Is reduced to Pg → 4.6 Torr b → c
The regeneration of the adsorbent is performed by the pressure reduction regeneration step, that is, the regeneration of the adsorbent is performed by using both the temperature swing method and the pressure swing method. If solar heat is available abundantly,
If the temperature is regenerated to b 'and then regenerated to c' by depressurization regeneration, it is possible to increase the amount of circulating refrigerant. FIG. 5 shows the thermal wave characteristic in the regeneration step, and it can be understood that the adsorbent temperature is smoothed with the passage of time along the flow direction of the adsorbent plate module 100.

Then, after the regeneration of the adsorbent is completed,
The regeneration energy is stored while maintaining the closed state of the steam valve 14 for a predetermined time corresponding to the time until the power demand reaches the peak.

After a lapse of a predetermined time corresponding to the peak time of the electric power demand, the adsorbent is cooled from c to d in FIG. 2, and then the steam valve 14 is opened to adsorb d to a. That is, in the adsorption step, the valve 27 on the heat collector 16 side is closed and the radiator 2 is closed.
The valve 26 on the first side is opened and the cooling water generated by the radiator 21 is supplied to the adsorption reactor 10 via the pump 17 to lower the temperature of the adsorbent 11 from 60 ° C. or higher to 40 ° C. or lower c. → After performing the cooling step d, the steam valve 14 is opened, the water in the evaporator 12 is evaporated, and the refrigerant vapor is adsorbed on the adsorbent 11 being cooled with the cooling water, and A d → a adsorption step of generating cold heat by the self-evaporation action is performed, and the refrigerant liquid (water) cooled by the cold heat becomes cold water and is directly sent to the fan coil 15 to perform cooling. The heat of adsorption generated at this time is cooled and removed by the cooling water formed by the radiator 21. In the d → a adsorption step, the pressure rises from 4.6 Torr to Pe while maintaining the temperature at 40 ° C.

FIG. 6 shows the thermal wave characteristics in the adsorption step, and it can be understood that the adsorbent temperature is smoothed over time along the flow direction of the adsorbent plate module 100. The adsorption step and the regeneration step are performed alternately with the heat storage state interposed therebetween. At this time, the adsorption reactor 10 is more efficient by preparing two reactors and alternately and concurrently performing the adsorption process and the regeneration process in a batch manner to perform heat storage cooling.

FIG. 3 shows an embodiment of the present invention, daytime 4 to daytime 4.
Cold heat storage capacity of 12000-150 to cover 5 hours of cooling
00Kcal, cooling capacity 2000-3000Kcal /
h is a schematic diagram for performance evaluation of the solar-assisted adsorptive regenerative refrigerator. As shown, T indicates a temperature detector, P indicates a pressure transducer, and F indicates a flow meter. In the adsorption reactor 10, temperature detectors are arranged vertically (in the flow path direction) in series in order to confirm the thermal wave propagation method. The solar heat collector 16 includes a heat collecting plate 16A and a storage section 16B for storing warm water heated by the heat collecting plate 16A.

As described above, the adsorption reactor 10 is constituted by a plurality of adsorber reaction modules 100 arranged in parallel in a vertical direction in a reaction vessel. The heat exchange coil 10a is wound. It should be noted that the heat transfer area, the adsorbent filling amount, and the thickness of the packed layer of the module 100 have been optimized from both aspects of heat transfer and mass transfer. Further, since the cold heat is taken out during the adsorption step by the thermal wave propagation method as described above, the temperature distribution is formed in the flow channel direction.

In addition to FIG. 1, a detailed piping system, especially a diagram showing the condition of hot water and cooling water piping in the adsorption reactor is additionally described.
Before being fed into the reservoir, the liquid is passed through a liquid reservoir 20 for measurement.

The test of the performance study was performed according to the following operation procedure according to the cycle diagram. The regeneration step was performed by the TPSA method using both the temperature swing and the pressure swing as described above. That is, hot water at a predetermined temperature (65 to 80 ° C.) is supplied to the adsorption reactor 10, and while the adsorption reactor 10 is heated, refrigerant vapor desorbed from the adsorbent 11 is exhausted by the vacuum pump 18 and condensed. The condensate is sent to the evaporator 19, the condensed amount is measured via the measuring liquid reservoir 20, and sent to the evaporator 12. The regeneration temperature was controlled by adjusting the amount of cooling water to the adsorption reactor 10 so that the thermal wave propagation method could be performed efficiently.

Then, after the regeneration process is completed, the regeneration energy is stored while keeping the steam valve 14 closed in consideration of the time until the power demand reaches a peak, and then the adsorption process is performed. Move to In the adsorption step, the condensed water in the measuring liquid reservoir 20 is returned to the evaporator 12 and the radiator 21
Is operated, and the cooling water is admitted to the adsorption reactor 1 via the pump 17.
0 and cool the adsorbent. At the same time, while the spray to the evaporator 12 is started by the pump 22 and the nozzle 13A, the fan coil 15 for the load is started to perform predetermined cooling. Thereafter, the steam valve 14 between the adsorption reactor 10 and the evaporator 12 is opened.

The cooling output is controlled by the adsorption reactor 1 in order to smoothly propagate the thermal wave shown in FIG.
The adjustment was performed by adjusting the amount of cooling water to zero. The coefficient of performance COP is the heating amount obtained from the hot water inlet / outlet temperature difference and the flow rate, the shaft power of the vacuum pump, and the load 15.
Was evaluated from the amount of cold heat obtained from the difference in cold water temperature and the flow rate. The operation test conditions were as follows: regeneration temperature Tg = 65-75 ° C., condensation temperature Tc = 35-40 ° C., adsorption temperature Ta = 25-40.
C. and the evaporation temperature Te = 5-10 ° C.

As a result of the above test, the thermal wave propagation shown in FIGS. 5 and 6 was smoothly performed by adjusting the flow rates of the hot water and the cooling water supplied to the adsorption reactor, and the temperature of each part of the adsorbent was changed with time in the flow path. Propagation in the direction was observed. The operation control of the refrigeration output is performed by forming the thermal wave shown in FIG. 6 while reducing the amount of cooling water supplied to the adsorption reactor by the pump 17, so that the operation can be performed at a constant inlet / outlet temperature of approximately 10/5 ° C. Was confirmed. It was also confirmed that the operation method using the thermal wave was effective in the cooling operation when the temperature of the adsorption reactor was lowered due to the outside air temperature at night.

Through the above series of operation tests, good results were obtained in both the refrigerating capacity and the cold heat storage amount. Table 1 shows a comparison of the performance of the solar-heat-absorption refrigeration apparatus and the clathrate-type heat-storage cooling system with the solar-heat-adsorption-type heat storage cooler of the present invention.

[0040]

[Table 1]

According to this embodiment, the heat storage density of the adsorption refrigeration system of the present invention is about 1.9 times that of the clathrate system, and the coefficient of performance is slightly reduced. In addition, since it is basically CFC-free and uses only silica gel / water system, it is highly safe, has no corrosion problem seen in absorption type, and is effective for power peak cut. Particularly, the following items have remarkable effects. That is, the present invention can operate with a low-temperature heat source, and in particular, can operate with a low heat source of 60 to 70 ° C. using solar heat.

The adsorbent (silica gel) and the refrigerant (water) are chemically stable and do not adversely affect not only the global environment but also the human body. Heating pressure reduction regeneration (TP
Since the SA) method is used, the heat storage efficiency is high. Since the adsorbent adsorbs only the refrigerant (water) under vacuum, it can be used semi-permanently and does not need to be replaced.

[0043]

As described above, according to the present invention, heat storage and cooling using a solid adsorbent is performed by utilizing daytime solar heat,
A method for forming a refrigeration cycle of a solar-heat-adsorption-type regenerative refrigerating apparatus that contributes to a reduction in peak daytime power consumption and is not inferior to other heat pumps or other refrigerating apparatuses in terms of thermal efficiency can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a solar-heat-adsorption-type heat storage refrigeration apparatus according to an embodiment of the present invention.

FIG. 2 is a graph showing a refrigeration cycle according to FIG. 1;

FIG. 3 is a schematic diagram of a solar heat absorption type regenerative refrigerator according to another embodiment of the present invention.

FIG. 4 is a schematic perspective view showing an internal configuration of an adsorption reactor of the refrigeration apparatus shown in FIG.

FIG. 5 is a characteristic diagram showing a thermal wave in a regeneration step.

FIG. 6 is a characteristic diagram showing a thermal wave in an adsorption step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Adsorption reactor 11 ... Adsorbent 12 ... Evaporator 13 ... Refrigerant liquid 14 ... Evaporation valve 15 ... Fan coil (heat exchanger) 16 ... Solar heat collector 18 ... Vacuum pump 19 ... Condenser 21 ... Radiator and others Heat exchange means

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideharu Yanagi 2-13-1, Botan, Koto-ku, Tokyo Co., Ltd. Inside Maekawa Works (72) Inventor Osamu 2-13-1, Botan, Koto-ku, Tokyo Co., Ltd. Maekawa Works (56) References JP-A-58-10026 (JP, A) JP-A-57-80158 (JP, A) JP-A-63-194165 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 17/08 F25B 27/00

Claims (7)

(57) [Claims] 1. An adsorption reactor for adsorbing a refrigerant to adsorb and regenerate a refrigerant by filling the adsorbent, and storing a refrigerant vapor desorbed from the adsorbent by heating the adsorbent at the time of regeneration as a refrigerant liquid via a condenser. An adsorption-type heat storage refrigeration apparatus including an evaporator that self-evaporates the refrigerant liquid during adsorption and a heat exchanger that performs heat exchange with a cold load using cold generated by the self-evaporation of the refrigerant liquid. A solar heat collector for generating heated hot water for desorbing the refrigerant from the adsorbent incorporated in the adsorption reactor, a vacuum pump for exhausting the refrigerant vapor desorbed from the adsorbent, and a condenser for condensing the desorbed refrigerant vapor A regeneration step of regenerating the adsorbent preferably by using a combination of a temperature swing and a pressure swing method by appropriately changing the supply of hot water from the heat collector to the reactor and the suction amount of the vacuum pump; Sucking A radiator or other heat exchange means for generating cooling water for suppressing heat generation of the agent, a steam valve interposed between the adsorption reactor and the evaporator, and inducing a self-evaporation action in the refrigerant liquid in the evaporator at the time of adsorption. After the regeneration step, after maintaining the heat storage state by continuing the shut-off state of the steam valve, during the adsorption step, the steam valve is opened to guide the refrigerant vapor from the evaporator to the reactor side, the refrigerant vapor An adsorption step of performing adsorption while suppressing heat generated by the adsorption with cooling water from a radiator or other heat exchange means, and forming a refrigeration cycle system by alternately repeating the regeneration step and the adsorption step with the heat storage state interposed therebetween. A method for forming a refrigeration cycle of an adsorption-type heat storage refrigeration apparatus utilizing solar heat. 2. The solar heating apparatus according to claim 1, wherein the generation of the hot water for desorption is performed by an auxiliary heat source using waste heat or the like provided together with the solar heat collector or an electric heater used at night. A method for forming a refrigeration cycle of an adsorption-type heat storage refrigeration apparatus. 3. The adsorption reactor having a plurality of reactors, wherein a regeneration step and an adsorption step are performed in parallel.
A method for forming a refrigeration cycle of the solar-heat-based adsorption-type heat storage refrigeration apparatus according to claim 1. 4. The method according to claim 1, wherein the adsorbent / refrigerant system comprises a silica gel / water system. 5. The adsorption using solar heat according to claim 1, wherein the flow rate of the hot water and the cooling water supplied to the adsorption reactor is adjusted, and the output during regeneration and adsorption is adjusted by a thermal wave propagation method. A method for forming a refrigeration cycle of a thermal storage refrigeration system. 6. The method according to claim 1, wherein the evaporator performs a showering operation from a spray nozzle to increase an evaporation area. 7. After the regeneration step is completed, the steam valve is kept closed to store heat energy generated in the regeneration step, and then the adsorption step is performed by opening the steam valve at peak power. The method for forming a refrigeration cycle of an adsorption-type heat storage refrigeration apparatus according to claim 1.