JPH04159A - Refrigerating system - Google Patents

Abstract

PURPOSE:To utilize cold and hot heat produced by a Vuilleumier cycle heat pump directly or indirectly for cooling by providing a second condenser to which a refrigerant cooled by a cold heat generator device is supplied using the hot heat produced by the pump a heating source of the hydrogen absorbing compound utilization cold heat generator device. CONSTITUTION:A Vuilleumier cycle heat pump is actuated by being changed in a gas pressure distribution therein by being heated externally, and temperature is raised at a portion of the distribution where the gas is increased at a portion of the same when the pressure is reduced. Refrigerated cooled by a low temperature heat exchanger, at the portion of the distribution when the temperature is lowered is sent to a first condenser 28 in a chamber 27 to be cooled which is then cooled by the refrigerant. Hot refrigerant heated by middle temperature heat exchangers 19a, 19b in the refrigerant at a portion of the distribution where the temperature is raised is fed to a hydrogen absorbing alloy utilization cold heat generator device 50 as a heat source for actuating the device 50, whereby hydrogen in a metal hydrogen compound is generated. Refrigerant for a second condenser 37 is cooled by cold heat produced upon the separation of the hydrogen, and the chamber 27 is also cooled by the second condenser 37.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refrigeration system suitable for cooling large rooms such as refrigerated warehouses.

[Conventional technology] Freon gas is used as a refrigerant in refrigerators, air conditioners, etc., but it is well known that the ozone layer in the stratosphere is beginning to be destroyed by the gas emitted into the atmosphere, which has become a serious problem. It is as follows.

A heat pump that does not use chlorofluorocarbon gas was invented in 1918 by Rudolf Blumyer of the United States.
There is a Blumyer cycle heat pump that utilizes the Letta heat cycle theory, which was published by H. Vuilleumier.

[Problem to be solved by the invention] Blumyer cycle heat bombs have no danger of atmospheric destruction, and due to their structural characteristics, they always generate cold and hot heat. The cold heat is used directly for cooling, etc., but the hot heat is used for heating. Either they are used for water heating or water supply, or they are discarded.

The present invention provides a highly efficient refrigeration system by using the heat generated by the Bulmeyer cycle heat bomb as the heat source of the cold heat generating device.

[Means for Solving the Problems] The refrigeration system of the present invention operates by being heated by an external heating source, and is equipped with the low-temperature heat exchanger of the Brumeyer cycle heat exchanger, which is equipped with a medium-temperature heat exchanger and a low-temperature heat exchanger. A first cooler is provided in the room to be cooled, and is operated by being supplied with the heat medium from the intermediate temperature heat exchanger of the Blumyer cycle heat pump, and is operated to cool the metal hydride from the metal hydride. A second cooler is provided in the cooled chamber to which hydrogen is separated and a refrigerant cooled by a hydrogen-absorbing alloy-applied cold-heat generator that generates cold heat at the time of separation is supplied.

[Function] The Brumeyer cycle heat pump is activated by being heated from the outside, which changes the pressure distribution of the gas inside.

The temperature increases in areas where the pressure of the gas is increased, and the temperature decreases in areas where the pressure is reduced.

The refrigerant cooled by the low-temperature heat exchanger in the portion where the temperature has decreased is sent to the first cooler in the chamber to be cooled, thereby cooling the chamber to be cooled.

The heat medium heated in the medium temperature heat exchanger in the portion where the temperature has increased is supplied to the cold heat generation device using the hydrogen storage alloy as its operating heat source, thereby separating the hydrogen in the metal hydride.

The cold heat generated during this hydrogen separation causes the second cooling chamber to be heated.
The refrigerant for the cooler is cooled, and the chamber to be cooled is also cooled by the second cooler.

[Example] An example of the present invention will be described using a specific example shown in FIG.

As shown in Fig. 1, the Brummyer cycle heat pump 1 has a structure in which a high temperature side cylinder 3 and a low temperature side cylinder 7 are connected to the crankcase 9 at an angle of 90@, and the inside of the high temperature side cylinder 3 is The provided high temperature side displacer 4 divides the space into a high temperature space 2 and a medium temperature space 24, and the inside of the low temperature cylinder 7 is also divided into a low temperature space 5 and a medium temperature space 24 by the low temperature side displacer 6.

The rod 15 fixed to the high-temperature side displacer 4 is connected to one end of the connecting rod 13 via a pin, and the other end of the connecting rod 13 is connected to the crank pin 11 by connecting the other end of the crank rod 1O, which has one end firmly fitted to the crankshaft 8. It is rotatably connected.

Further, the rod 14 fixed to the low temperature side displacer 6 is connected to one end of another crank rod 12 with a pin, and the other end of this crank rod 12 is connected to the crank pin 1.
It is rotatably connected to 1.

A heater IEI connected to a high temperature regenerator 17 is provided above the high temperature side cylinder 3, and this high temperature regenerator 17 is connected to an intermediate temperature heat exchanger 18a having an intermediate temperature heat exchange coil 18 inside.

Further, the medium temperature heat exchanger 18a is connected to a medium temperature heat exchanger 19b provided outside the low temperature side cylinder 7, and is also connected to the medium temperature space 24 of the high temperature side cylinder 3,
A heat source 48 such as a burner is provided near the outside of the heater 16.

The medium temperature heat exchanger 19b is provided with a medium temperature heat exchange coil 20, and the medium temperature heat exchanger 19b is connected to a low temperature heat exchanger 23 via a low temperature regenerator 21. is equipped with a low-temperature heat exchange coil 22 therein, and is further connected to the upper part of the low-temperature side cylinder 7.

These high-temperature space 2, medium-temperature space 24, and low-temperature space 5 are spaces with the same pressure, and are filled with helium gas, and helium gas can move within these spaces.
It looks like this.

The low-temperature heat exchange coil 22 is connected to a first cooler 28 in the refrigerator compartment 27 by a refrigerant liquid sending pipe 28 equipped with a pump 25, and the cooling medium (for example, brine) in the liquid sending pipe 26
These low-temperature heat exchange coils 22 and the first cooler 2 of the refrigerator compartment
8 can be cycled.

Further, the medium-temperature heat exchange coil 18 and the medium-temperature heat exchange coil 20 are connected in series, and are connected to the heat dissipation filter 51 in the heat storage tank 31 through the heat medium liquid sending pipe 28.
The heat medium (hot water) exiting from the heat exchanger coil 20 is passed through the heat radiation coil 51 of the heat storage tank 31 by the pressurizing pump 30 and transferred to the medium temperature heat exchange coil 20.
will be returned to.

The pump 30 provided in the liquid transfer pipe 29 increases the liquid pressure within the heat medium liquid transfer pipe 29.
This works to raise the low point of the heat medium inside and increase the heat absorption capacity of the heat medium.

Further, another liquid sending pipe 34a is connected to the heat storage tank 31, and this liquid sending pipe 34a has a three-way valve 43, a valve 64,
The pump 44 and the heat radiation coil 38a provided in the first storage AI of the cold heat generating device 50 are connected. Further, a valve 5 is also connected to another liquid feeding pipe 34b branched and connected at the three-way valve 43.
7 is connected to a heat dissipation coil 38b provided in the second storage tank A2, and by alternately opening and closing the valves 64 and 57 and switching the flow path of the three-way valve 43, the heat medium from the heat storage tank 31 is These two heat radiation coils 38a and 38b are connected to the pump 4.
4 and are alternately circulated.

Further, the first storage device A1 and the second storage device A2 are provided with cooling coils 41a and 41b, respectively,
A three-way valve 4 is connected to the cooling pipe 35a connected to the cooling coil 41a.
The three-way valve 45 is provided with a valve 5 and a valve 59.
The cooling coil 41 of the second reservoir with the cooling pipe 35b comprising 8
Connect b.

Therefore, by switching the opening and closing of the valves 58 and 59 and the flow path of the three-way valve 45, the cooling coil 41a or
1b so that cooling water is circulated through either one of them.

Furthermore, the cold heat generating device 50 includes a third storage device ^3.
The third storage A3 has a heating coil 42a and a cooling coil 39a, and the fourth storage A4 also has a heating coil 42b and a cooling coil 39b. It's an inner thigh.

A cooling pipe 40a provided with a three-way valve 4B and a valve 63 is connected to the heating coil 42a, and a cooling pipe 40b branch-connected to the three-way valve 46 is connected to the heating coil 42a of the fourth storage device A4. A coil 42b is connected to the cooling pipe 40.
b is provided with a valve 61.

By opening and closing the valves 81 and 83 and switching the flow path of the three-way valve 46, the cooling water can be circulated through either the heating coil 42a of the third storage A3 or the heating coil 42b of the fourth storage Aa. .

A refrigerant liquid sending pipe 3Ea provided with a valve 62 is connected to the cooling coil 39a of the third storage device A3, and this refrigerant liquid sending pipe 3Eia is a refrigerant liquid sending pipe for the cooling coil 39b of the fourth storage device A4. 3[ib] is connected to the three-way valve 47 provided at the ib. Further, the refrigerant liquid feeding pipe 3fib includes a pump 48 and a valve 60, and is connected to a second cooler 37 provided in the refrigerator compartment 27.

Therefore, these cooling coils 39a and 39b
The refrigerant is circulated by the pump 48 by switching the flow path of the three-way valve 47 and switching the opening and closing of the valves 80 and 62.

In the first storage AI, IH is stored in the first metal hydride that stores hydrogen, in the second storage A2, the first hydrogen storage alloy M is stored, and in the third storage A3, the second hydrogen is stored. The storage alloy M2 and the second metal hydride M2H storing hydrogen are stored in the fourth storage device A4, respectively, and Ml and M2 have different characteristics.

The refrigeration system described above operates as follows.

In Blumyer Cycle Heat Bump 1, the enclosed helium scum causes a change in pressure distribution due to a change in temperature distribution.
Two displacers 4 like a Stirling engine
, 6 reciprocate with a phase difference of 80°.

The helium gas in the heater 16 on the high temperature cylinder 3 side is heated 8
48 and is pressurized while passing through the high temperature regenerator 17,
As a result, the temperature rises and heat is radiated to the medium-temperature heat exchanger 19a, heating the heat medium (water) in the coil 18 of the heat exchanger 19a, and the heated heat medium is transferred to the heat storage tank 31 by the pump 30. The heat medium is fed into the coil 51, and the heat medium from the heat radiation coil 51 is returned to the coil 20 of the medium temperature heat exchanger 19b.

On the other hand, the pressure of the helium gas on the low-temperature cylinder side is reduced, which lowers the temperature and cools the brine passing through the coil 22 of the low-temperature heat exchanger 23, and this cooled brine is transferred to the first cooling unit installed in the refrigerator compartment 27. Pump 25 to 2 days
is sent to cool the inside of the refrigerator compartment 27, and then sent to the low temperature heat exchanger 2 again.
Return to the coil 22 of No. 3.

As described above, the heat medium sent from the medium temperature heat exchanger 19b into the heat storage tank 31 heats the heat medium in the heat storage tank 31, and this heated heat medium opens the valve 84 and closes the valve 57. By switching the flow path of the three-way valve 43, the heat is sent to the heat radiation coil 38a of the first storage device A, radiates to the first metal hydride MIH in the first storage device ^1, and returns to the heat storage tank 31.

Next, the operation of the cold heat generating device 50 will be explained.

(1) When the heat medium from the heat storage tank 31 is supplied to the heating coil 38a of the first storage device A1.

Valves 58.60, 83.84 are open, valves 57.59, 81
．． 82 is closed, and the three-way valve 43 is switched toward the liquid feeding pipe 34a, the three-way valve 45 is switched toward the cooling pipe 35b, the three-way valve 47 is switched toward the refrigerant liquid feeding pipe 38b, and the three-way valve 46 is switched toward the cooling pipe 40a.

(a) The first metal hydride N in the first reservoir Al is heated by the heating medium supplied to the heating coil 38a of the first reservoir AI.
ut is heated and pressurized, and hydrogen in the first metal hydride M+H is separated.

When the predetermined temperature and pressure are reached, the valve 5 of the first communication pipe 52a
3a opens, the separated hydrogen in the first storage A1 moves to the third storage A3 and reacts with the second hydrogen storage alloy M2 in the same storage A3, producing a second metal hydride M2H. do.

The heat during this reaction is absorbed by the cooling water flowing through the heating coil 42a (regeneration process).

(b) On the other hand, in the second storage A2, cooling water is supplied to the cooling coil 41b to lower the temperature and pressure.

When the second storage A2 reaches a predetermined temperature and pressure, the valve 53b of the second communication pipe 52b opens, and the second
The separated hydrogen of the metal hydride M2H moves to the second storage A2 and reacts with the first storage alloy () 11 in the second storage A2 to produce the first metal hydride MIH. The heat generated during the reaction is absorbed by the cooling water passing through the cooling coil 41b.

The second metal hydride M in the fourth storage A4 in this process
When hydrogen separates from 2H and moves to the second storage A2, cold heat is generated (cold heat generation process), which causes the hydrogen to move to the second storage A4.
The brine in the cooling coil 39b is cooled, and the cooled brine is sent to the second cooler 37 in the refrigerator compartment 27 by the pump 4.
8, and this refrigerator compartment 27 is cooled.

(2) When the heat medium from the heat storage tank 31 is supplied to the heating coil 38b of the second storage device A2.

Valves 57, 59, 61.62 are open, valves 58, 60, 63.
64 is closed, the three-way valve 43 is switched in the direction of the liquid feed pipe 34b, the three-way valve 45 is switched in the direction of the cooling pipe 35a, the three-way valve 47 is switched in the direction of the refrigerant liquid pipe 36a, and the three-way valve 46 is switched in the direction of the cooling pipe 40b.

(a) Heat storage tank 31 to heating coil 38b of second storage device A2
By supplying the heat medium from the storage tank A2, the temperature and pressure of the storage tank A2 are increased, and hydrogen in the second metal hydride M2H therein is separated.

When the predetermined temperature and pressure are reached, the valve 53 of the second communication pipe 52b is activated.
b is opened, and the separated hydrogen in the second storage A2 is transferred to the fourth storage A4.
and reacts with the second hydrogen storage alloy M2 in the storage A4 to generate a second metal hydride M2H (regeneration process)
.

The reaction heat at this time is absorbed by the cooling water flowing through the heating coil 42b.

(b) On the other hand, cooling water is supplied to the cooling coil 41a of the first storage A, and the temperature and pressure of the first storage A are lowered.

When the predetermined temperature and pressure are reached, the valve 5 of the first communication pipe 52a
3a opens, and the hydrogen in the regenerated second metal hydride M2H in the third storage A3 is separated, moves to the first storage A1, and reacts with the first hydrogen storage alloy M1 in the same storage A1. As a result, a first metal hydride MIH is generated.

When the hydrogen of the second metal hydride M2H in the third storage A3 is separated and transferred to the first storage A1, cold heat is generated (cold heat generation process), and this cold heat cools the brine in the cooling coil 39a, The cooled brine is subsequently supplied to the second cooler 37 of the cold storage compartment 27 .

By repeating the steps (1) and (2) above alternately, the cooled prine is sent to the second cooler 37,
Cooling of the refrigerator compartment 27 is performed.

In addition, as the hydrogen storage alloy in the above example, Ca
There are various types such as -8-Fli, Ca-Ha-Xi-AI, and there are no particular limitations.

In addition, the heat medium in the heat medium liquid transfer pipe 29 and the chilled tofu in the refrigerant liquid transfer pipe 26 and other liquid transfer pipes 34a and 34b, the cooling pipe 35a,
35b, 40a, 40b, refrigerant liquid transfer pipes 38a, 36b
, water, ammonia, etc. may be used and the medium is not particularly limited.

Furthermore, the cold heat generating device 50 is connected to four storage units A+ and A2.
, A3 and A4 are shown above,
Any structure may be used as long as it generates cold energy by combining and separating hydrogen storage alloy and hydrogen.

[Effects of the Invention] As described above, according to the present invention, the cold heat and hot heat generated by the Bulmeyer cycle heat bomb are used to directly cool the cold storage room, and the hot heat is generated by the cold heat generating device using a hydrogen storage compound. The cooler is also supplied with refrigerant cooled by the cold heat generating device to cool the cold storage compartment, so the cold and warm heat generated by the Blumyer cycle heat pump can be used directly and indirectly, respectively. can be used for cooling, providing a highly efficient refrigeration system.

Moreover, there is an advantage that there is almost no risk of environmental destruction as in the case of Froncas.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and FIG. 2 is a hydrogen pressure car temperature characteristic diagram of the first hydrogen storage alloy M1 and the second hydrogen storage alloy M2. Diagram Middle■@lI Plumyer cycle heat pump 2...High temperature space 3...High temperature side sill 4...High temperature side displacer 5...Low temperature space 6...Low temperature side displacer 7...Low temperature side sill 8...Crankshaft 9. - Crank case 1OII - Crankshaft 11 - Crankbin 12, 13 - Connecting rod 14.15 - Rod 16 - Heater 170 High temperature regenerator 18.20 0 Medium temperature heat exchange coils 19a, 19b - Medium temperature heat exchanger 21... Low-temperature regenerator 22...Low-temperature heat exchange coil 23...Low-temperature heat exchanger 24...Medium temperature space 25...Pump 26...Refrigerant liquid sending pipe 27...Refrigerating room
28..First heat exchanger 28..Heat medium liquid transfer pipe 30..Pump for pressurization 31--Heat storage tank A1..First storage device A2..Second storage device A3..Third storage device A4.・Fourth reservoir 34a, 34b ・Liquid feeding pipe 35a, 35
b, 40a, 40b ・Cooling pipes 38a, 38b ・
Refrigerant liquid sending pipe 37 - Second cooler 38a, 38b - Radiation coil 39a, 38b - Cooling coil 41a, 41b - Cooling coil 42a, 41b, Accommodation coil 43.45.46.47 - Three-way valve 44.O Pump 57.58, 53ftO, 131, 62, 63, 644
8--Pump 49...Heat source 51, Medium heat dissipation coil 52b, Second communication pipe 52a, - First communication pipe 50...Cold heat generators 53a, 53b, Valves, Valve Applicant Nichi Shii Co., Ltd. Agent Patent Attorney Mae 1) Kiyomi Figure 16 Temperature (℃) +0050 0

Claims (1)

[Claims] The Bulmeyer cycle heat pump operates by being heated by an external heating source and is equipped with a medium-temperature heat exchanger and a low-temperature heat exchanger. A hydrogen storage alloy application that is installed in a cooling chamber and operates by being supplied with a heat medium from the medium temperature heat exchanger of a Brumeyer cycle heat pump to separate hydrogen from metal hydrides and generate cold heat during this separation. A second section to which the refrigerant cooled by the cold heat generating device is supplied.
A refrigeration system characterized in that a cooler is provided in the room to be cooled.