JPS6334463A - Air-conditioning hot-water supply device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an air conditioning/heating water supply device that can simultaneously obtain cold water for cooling, hot water for heating, and hot water.

[Conventional technology]

In a fuel cell power generation device that generates DC power using hydrogen gas obtained by reforming natural gas and oxygen in the air, the heat generated by compressing the air for the air electrode is converted from exhaust heat by cooling it with cooling water. , low-temperature water of about 45 to 50°C is obtained, and water vapor is obtained by absorbing the heat of reaction between hydrogen and oxygen in a heat exchanger and then passing it through a steam-water separator.

By passing the steam through the heating coil in the hot water storage tank, hot water of about 60° C. can be obtained, and cold water for cooling can be obtained by the absorption refrigerator.

[Problem that the invention seeks to solve]

However, in order to use low-temperature water of about 40 to 50° C. as a heat source for hot water supply, it is necessary to further raise the temperature using a boiler or heater. When a boiler is used, fuel needs to be replenished regularly, smoke is emitted, and fire prevention needs to be considered.

Furthermore, when a heater is used, thermal efficiency is poor and running costs are high.

Moreover, even if a boiler or heater is used, cooling water for cooling cannot be obtained at the same time.

In view of the above-mentioned problems, an object of the present invention is to provide an air-conditioning/heating water heater that uses an hour wheel to draw water, can reduce running costs, and can obtain not only hot water but also cold water for cooling and hot water for heating at the same time. The purpose is to donate money.

[Means for solving problems]

In the air-conditioning/heating water supply device according to the present invention, for the same temperature (absolute temperature) T, the first hydrogen storage alloys M1A and M1B have a hydrogen dissociation pressure of low pressure P, and the dissociation pressure of hydrogen is high pressure P (p).
H>PL), the second hydrogen storage alloys M2A and M2R each have a heating coil 18.34.24.42 inside.
and a hydrogen absorption/desorption exchanger 14 accommodated in a first tank 22.38 and a second tank 30.46 provided with cooling coils 20.36.26.44, and in which both tanks are communicated with each other.
．． 16, a fuel cell power generation device 50 that outputs exhaust heat as steam and low-temperature water, and a first hydrogen storage alloy that devolatilizes hydrogen from the second hydrogen storage alloys M2A and M2R.
In the forward direction operation in which the hydrogen storage alloys M1A and M1B store hydrogen, cooled water for cooling is passed through the heating coil 24.42 in the second tank 30.46, and fluid is passed through the heating coil 24.42 in the first hydrogen storage alloy M1A and M1B. In the reverse direction operation in which hydrogen is devolatilized from the first hydrogen storage alloys M1A, M1B and hydrogen is stored in the second hydrogen storage alloys M2A, M2R through the cooling coil 20.36, the stem of the fuel cell power generation device 50 is Mind first
passing the fluid through the heating coil 18.34 in tank 22.38 and passing the fluid through the cooling coil 26.44 in a second tank 30.46; 11 hydrogen absorption/desorption exchangers 14
．． A first fluid connection circuit that operates at least one of the hydrogen absorption and desorption exchangers 14 or 16 in the forward direction, and at the same time operates the remaining hydrogen heat absorption and desorption exchangers 14 or 16 in the reverse direction, alternately performing the forward direction operation and the reverse direction operation; A heating coil 60 is provided in the hot water storage tank, and a hot water supply heat exchanger 62 from which the hot water flows out; and a heat exchange coil 122, 126 in the tank 125, 129.
and a hydrogen storage alloy 124.128 containing a hydrogen storage alloy in a cough tank is provided for at least one month, and the paired hydrogen storage and heat exchanger 124.12
8 are communicated via a compressor 130, and the compressor 130 is started, and the pressure in one of the hydrogen absorbing and desorbing heat exchangers 124 or 128 is made higher than the hydrogen dissociation pressure, and the other hydrogen is Heat absorption/desorption exchanger 128 or 12
The low-temperature water from the water heater 120 whose internal pressure is lower than the hydrogen dissociation pressure and the fuel cell power generation device 50 is passed through the heat exchange coil 122 or 126 of the hydrogen absorption/removal heat exchanger 124 or 128 on the high pressure side. Next, it is passed through the heating coil 60 of the negative device 62 (heat exchanger for hot water supply), and then passed through the hydrogen absorption and desorption exchanger 128 on the low pressure side.
or 124 through the heat exchange coil 126 or 122 and then returned to the fuel cell power generation device 50 for circulation.

[Effect]

First, the operation of the refrigerator 12 will be explained.

In FIG. 1, when the hydrogen heat absorption and desorption exchanger 14 is operated in the forward direction and the hydrogen absorption and desorption exchanger 2S16 is operated in the reverse direction,
The cooling water for cooling is passed through the heating coil 24 to heat the second hydrogen storage alloy M2A, and the cold water as a fluid cooled by the cooling tower 70 (for example, the temperature of the first hydrogen storage alloy is set to TL
, the temperature of the second hydrogen storage alloy is T. When it closes, please call >
T,>TL) is passed through the cooling coil 20 to cool the first hydrogen storage alloy MIA, and steam from the fuel cell power generator 50 is passed through the heating coil 34 to cool the first hydrogen storage alloy MIB. is heated, and the cold water cooled by the cooling tower 70 is passed through the cooling coil 44 to cool the second hydrogen storage alloy M2B.

As a result, hydrogen is devolatilized from the second hydrogen storage alloy M2A and the first hydrogen storage alloy MIB, and this hydrogen is stored in the first hydrogen storage alloy MIA and the second hydrogen storage alloy M2B. Accordingly, the second hydrogen storage alloy M2A and the first hydrogen storage alloy MIB absorb heat, and the first hydrogen storage alloy MIA and the second hydrogen storage alloy M2B radiate heat.

Therefore, the cooling water flowing into the heating coil 24 is cooled and discharged as cooling column cold water.

When most of the hydrogen stored in the second hydrogen storage alloy M2A and the first hydrogen storage alloy MIB is devolatilized, next,
In the same manner as above, the hydrogen absorption and desorption exchanger 14 is operated in the reverse direction,
The hydrogen heat absorption/desorption exchanger 16 is operated in the forward direction.

As a result, hydrogen is devolatilized from the first hydrogen storage alloy MIA and the second hydrogen storage alloy M2B, and this hydrogen is stored in the second hydrogen storage alloy M 2 A and the first hydrogen storage alloy MIB. Regarding this, the first hydrogen storage alloy MIA and the second hydrogen storage alloy M2B absorb heat, and the second hydrogen storage alloy M2A and the first hydrogen storage alloy
Hydrogen storage alloy MIB generates heat.

Therefore, the cooling water flowing into the heating coil 42 is cooled and discharged as cooling column cold water.

In this way, by alternately performing the forward direction operation and the reverse direction operation, cold water for cooling can be obtained continuously.

Next, the operation of water heater 120 will be explained.

The compressor 130 is started, and hydrogen is stored in the alloy. do.

As a result, the hydrogen stored in the hydrogen storage alloy MC is desorbed, moves to the hydrogen absorption/desorption exchanger 128 side, and is stored in the hydrogen storage alloy MD. Along with this, in the hydrogen absorbing and desorbing heat exchanger 128, 45% of the energy from the fuel cell power generation device 50 passes through the heat exchange coil 126 due to an exothermic reaction accompanying hydrogen absorption.
~50℃ low temperature water is heated to high temperature water (e.g. 80℃).
℃), this high temperature water passes through the heating coil 60 and heats the water in the hot water storage tank to obtain hot water (for example, 60 ℃), and after being cooled by this, is supplied to the heat exchange coil 122, The hydrogen storage alloy MC is heated to promote hydrogen devolatilization, and after being cooled by this, it is returned to the fuel cell power generation device π50, and the exhaust heat is converted into low-temperature water of 45 to 50°C again, which is then sent from the fuel cell power generation device 50. It will be leaked and the above action will be repeated.

Hydrogen absorption/desorption heat exchange 2'; When most of the hydrogen in 124 is devolatilized, contrary to the above case, the compressor 13
0, the pressure inside the hydrogen absorption/removal heat exchanger 8124 is made higher than the hydrogen dissociation pressure, and the pressure inside the hydrogen absorption/removal heat exchanger 128 is made lower than the hydrogen dissociation pressure. As a result, the same operation as above is performed.

In this way, continuous hot water supply can be obtained.

〔Example〕

Preferred embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an air conditioning/heating/water supply system 10 of the first embodiment, and FIG. 2 shows a refrigerator 12 having valves omitted in FIG. 1.

The refrigerator 12 includes a hydrogen absorption/removal heat exchanger 14 and a hydrogen absorption/removal heat exchanger 16 having the same configuration.

This hydrogen absorption/desorption exchanger 14 has a first
A hydrogen storage alloy MIA is housed in the second tank 30, a second hydrogen storage alloy M2A is housed in the second tank 30, and the first tank 22 and the second tank 30 are communicated with each other through a pipe 32. The first tank 22 is provided with a heating coil 18 and a cooling coil 20, and the second tank 30 is provided with a heating coil 24 and a cooling coil 26.

Similarly, in the hydrogen absorption/desorption exchanger 16, the first tank 38 houses the first hydrogen storage alloy MIB, the second tank 46 houses the second hydrogen storage alloy M2B, and the first tank 38 and the second tank 46 are communicated with each other through a pipe 47. A heating coil 34 and a cooling coil 36 are provided in the first tank 38, and a heating coil 42 and a cooling coil 44 are provided in the second tank 46.

The first hydrogen storage alloys M1A and M1B are, for example, ca N
i MmAl (calcium-nickel-mitshu metal-aluminum alloy), and the second hydrogen storage alloy M2
ASM2B is, for example, Mm Ni CaAf (Mitsushmetal-nickel-calcium-aluminum alloy). Here, the first hydrogen storage alloys M1A, M1B
The hydrogen dissociation pressure PL of the second hydrogen storage alloy M2A, M2
The dissociation pressure P of hydrogen in [3 is lower pressure (PL<P).

Rich hydrogen gas obtained by reforming natural gas 48 with a reformer 49 is supplied to the fuel cell power generation device 5o. The fuel cell power generation device 50 uses this hydrogen gas and oxygen gas in the air to generate direct current, and also emits water vapor and low temperature water of about 45 to 50° C. as waste heat. This steam is obtained by absorbing the heat of reaction between hydrogen and oxygen in a heat exchanger and then passing it through a steam separator. In addition, low-temperature water is used as a pre-treatment for injecting fuel gas into the fuel electrode.
Cooling water when separating H and O from a mixed gas of CO,
Air scraped exhaust gas (Nt, H, O20) to I20
It is obtained by mixing the cooling water during separation and recovery of the air and the cooling water of the high-temperature air produced as a result of adiabatic compression by the low-temperature air compressor in the turbo compressor section.

The boiler 52 burns the natural gas 48 to supply the hot water tank 5.
The hot water from the fuel cell power generating device 50 is heated to generate water vapor, and the water vapor from the fuel cell power generation device 50 alone is used to replenish the amount of water that is insufficient.

The hot water heat exchanger 62 includes a heating coil 57 in the hot water storage tank.
．． 58.60 is installed, which heats the return hot water and make-up water that have returned unused, and discharges the hot water at a temperature of about 60°C.

The water heater 120 has a hydrogen heat absorption/removal exchanger 124 and a hydrogen heat absorption/removal exchanger 12B having the same configuration.

The hydrogen heat exchanger 2S124 includes a heat exchange coil 122 in a tank 125, and accommodates a hydrogen storage alloy MC. Similarly, the hydrogen absorption/desorption exchanger 128
29 is equipped with a heat exchange coil 126, and the hydrogen storage alloy M
D is accommodated. Tank 125 and tank 129 are connected to solenoid valve V40. They are communicated through a pipe in which V41 is interposed and a pipe in which solenoid valves V42 and V43 are interposed. These pipes are communicated by a pipe in which a compressor 130 is inserted.

The fuel cell power generation device 50 and the heating/water heat exchanger 56 are connected by a pipe Pi, the pipe 1'l and one end of the heating coil 57 are connected by a pipe P2, and the pipe P1 and the heating coil 1 are connected to each other by a pipe P2.
8.34 is connected by a pipe P3, and the pipe PI and the boiler 52 are connected by a pipe P4, and steam from the fuel cell power generation device 50 or the boiler 52 is connected to the heating hot water heat exchanger 56 and the heating coil. 57.18.34.

the respective other ends of the heating coils 18, 34 and the heating coils 5
8 is connected to one end of the pipe P7, and a heating hot water heat exchanger ljI! is connected to the pipe P7. The pipe P is connected to the pipe P via the heating coil 58.
8 and a part of the pipe P5, the power 11 heating coil 58 and the hot water tank 54, the fuel cell power generator 50 are
8 and a part of the pipe P5, and the pipe P5 and the other end of the heating coil 57 are connected by a pipe P6, and the condensed hot water generated by absorbing heat from the water vapor passes through these pipes and is connected to the fuel cell. The water is returned to the power generator 50 or hot water tank 54. The fuel cell power generation device 50 heats this hot water with exhaust heat to generate steam again, and sends this to the pipe P.
i.

One end of the heating coil 24 is connected to the cold water return header 6 by a pipe P15.
4, the pipe P15 and one end of the heating coil 42 are connected by a pipe P16, and the other end of the heating coil 24 is connected to the pipe P1.
7 is connected to the cold water header 68 via the cold water tank 66, and the other end of the coil 42 is connected to the pipe r'17 and connected to the pipe P18.
The cooling water that has been circulated and warmed is cooled through the heating coil 24 or the heating coil 42, and then flows out as cold water for cooling through the cold water tank 66 and the cold water header 68. It has become.

One end of the cooling coil 44 is connected to the outlet end of the cooling tower 70 by a pipe P19, which connects the pipe T''19 and the cooling coil 36.26.
One end of 20 means pipe 1) 20, pipe P21, and pipe P, respectively.
22 and the other end of the cooling coil 44 and the cooling tower 7
0 is connected to the inflow end by a pipe P23, and the pipe P23 and the other end of the cooling coil 36, 26, 20 are connected to each other by a pipe P24.
, pipe 1) 25 , are connected by pipe P26, and the first hydrogen storage alloy MIA, the second hydrogen storage alloy M2A, the first hydrogen storage alloy
The hydrogen storage alloy MII3 or the second hydrogen storage alloy M2B is cooled to store hydrogen therein.

The heating hot water heat exchanger 56 is connected to the hot water return header 72 and the hot water header 74 through pipes P27 and P28, respectively, and the heated return hot water that has been circulated and cooled is transferred to the heating hot water heat exchanger 56. It is designed to heat up and release hot water for heating.

Approximately 45-50°C generated by fuel cell power generation device 50
The outflow end of the low temperature water and the inflow end of the returned low temperature water that circulates and returns to the fuel cell power generation device 50 are pipe P9 and pipe P, respectively.
51, one end of the heat exchange coil 126 and the pipe P
9 and pipe P51 are connected by pipe P50 and pipe P52, respectively, and the other end of heat exchange coil 122 and heating coil 60
The other end of the heating coil 60 and the other end of the heat exchange coil 126 are connected by a pipe P12, and the low temperature water from the fuel cell power generation device 50 is connected to the heat exchange coil 122 or the heat exchange coil 126. The hydrogen storage alloy MC or hydrogen storage alloy MD is cooled by passing through the exchange coil 126, and the high-temperature water heated to about 80°C passes through the heating coil 60 to supply hot water in the heat exchanger 62 for easy supply. The temperature is about ℃,
Next, after passing through the external coil 1a coil 126 or heat exchange coil 122 and heating the hydrogen storage alloy MD or hydrogen storage alloy MC, it returns to the fuel cell power generation device 50 and is heated by the exhaust heat, and the low temperature water of about 45 to 50°C is heated. The liquid then flows out into the pipe P9 again.

Solenoid pulps V44 to V47 are interposed in the pipes P9, P50, P51, and P52, respectively.

Electric power is normally obtained from the fuel cell power generation device 50, and during low load times such as at night, a portion of this power is stored in the battery 76, and in an emergency such as when the fuel cell power generation device 50 goes down, the battery 76 is used. Further power generation [75 with battery 7
It is designed to back up 6. Note that the direct current from the fuel cell power generator 50 and the battery 76 is converted into alternating current by a converter (not shown) and then used.

As shown in FIG. 2, the heating coil 18.34, the cooling coil 26, the heating coil 24, the cooling coil 44, the force coil 42, and the cooling coil 20.36 have solenoid valves ■l to ■6 at both ends, respectively. ■9~V12, V15~V2
0 is connected.

Next, the operation of the first embodiment configured as described above will be explained.

In the initial state, most of the hydrogen in the hydrogen absorption/removal heat exchanger 14 is stored in the second hydrogen storage alloy M2A, and most of the hydrogen in the hydrogen absorption/removal heat exchanger 16 is stored in the first hydrogen storage alloy. M
It is assumed that most of the hydrogen in the hydrogen absorption/removal heat exchanger 124 and the hydrogen absorption/removal exchanger 128 is stored in the hydrogen storage alloy MC. Further, it is assumed that all solenoid valves Vl to V20 and V40 to V47 are closed.

In the following, from the second tank 30, the second tank 46, or the tank 125 to the first tank 22, the first tank 3, respectively.
8 or tank 129 is called forward direction operation, and the case where hydrogen moves to the first tank 22, the first tank 38, or the tank 1 is called forward operation.
29 to a second tank 30, a second tank 46, and
The case where hydrogen moves to tank 125 is called reverse direction operation.

Solenoid valve ■3, V4, V9, t/l 01V
11. V12, V17, V18, V41, V42, V4
5 and V46 open.

As a result, the refrigerator 12 is heated to 12°C.
A certain amount of recirculated water passes through the pipe P15 and the heating coil 24 to the second
The hydrogen storage alloy M2A is heated, and cooling water of about 32° C. cooled by the cooling tower 70 passes through the pipes P19, P22, and the cooling coil 20, and cools the first hydrogen storage alloy MIA.

Thus, hydrogen is devolatilized from the second hydrogen storage alloy M2A, moves into the first tank 22 through the pipe 32, is stored in the first hydrogen storage alloy MIA, and is absorbed into the second hydrogen storage alloy M2.
A absorbs heat and the first hydrogen storage alloy MIA radiates heat.

Therefore, the returned cooling water passing through the heating coil 24 is cooled to about 7'c, and is used for cooling through the pipe P17, the cold water tank 66, and the cold water header 68. On the other hand, the cooling water passing through the cooling coil 20 is heated and returned to the cooling tower 70 through pipes P26 and P23, where it is cooled again to about 32°C.

At the same time, the cooling water at about 32°C from the cooling tower 70 is pipe 1)
19, the second hydrogen storage alloy M2 passes through the cooling coil 44
113 and heat the first hydrogen storage alloy Ml[3 by passing the stem air from the fuel cell power generator 50 and, if necessary, the boiler 52, through the pipes Pl, P4, P3, and heating coil 34.

Thus, hydrogen is devolatilized from the first hydrogen storage alloy MIB, moves through the pipe 47 into the second tank 46, is stored in the second hydrogen storage alloy M2B, and the first hydrogen storage alloy MIB absorbs heat. The second hydrogen storage alloy M2B generates heat.

Therefore, the cooling water passing through the cooling coil 44 is heated, returns to the cooling tower 70 through the pipe P23, and is again made into low temperature water of about 32° C. and is discharged. On the other hand, the steam passing through the heating coil 34 is cooled to become water, passes through the pipe P7 and the heating coil 58, heats the hot water in the retention tank 62, is cooled thereby, and passes through the pipe P8 as described above. The water is returned to the hot water tank 54 or to the fuel cell power generation device 50, where it is turned into steam again by the IF heat, and is discharged into the pipe P'l.

At this time, the hydrogen pressure and temperature in the second tank 46 are shown at 8 points in FIG. 3(A), and the hydrogen pressure and temperature in the first tank 38 are shown at point R in FIG. 3(A). . Figure 3 (A)
, the straight lines indicated by MIA, MiB, and M2AXM2B are hydrogen storage and dissociation lines of the hydrogen storage alloys indicated by the respective symbols. In reality, this straight line has a certain width, and at the same temperature, the pressure is higher when hydrogen is absorbed, and the pressure is lower when hydrogen is desorbed.

Simultaneously with the operation of the refrigerator 12, the pressure in the tank 125 of the water heater 120 is made low by the compressor 130, and the pressure in the tank 129 is made high pressure.

As a result, hydrogen is devolatilized from the hydrogen storage alloy MC, moves into the tank 129 through the solenoid valve ■42, the compressor 130, and the solenoid valve V41, and is stored in the hydrogen storage alloy MD, where the hydrogen storage alloy MC absorbs heat. At the same time, the hydrogen storage alloy MD generates heat.

- On the other hand, low-temperature water of about 45 to 50°C warmed by exhaust heat flows out from the fuel cell power generation device 50, and the pipe P9,
100 hydrogen storage alloy MD through heat exchange coil 126
The high-temperature water of about 80°C that is cooled to about 100°C and heated thereby passes through the pipe P12 and the heating coil 60 to maintain the hot water supply in the hot water storage tank 62 at about 60°C. As a result, the high temperature water passing through the heating coil 60 becomes about 60°C, and passes through the tube Pli heat exchange coil 122 to heat the hydrogen storage alloy MC to about 35°C. The cooled low-temperature water passes through the pipe P51 and returns to the fuel cell power generation device 50, where its exhaust heat is used to turn it into low-temperature water of about 45 to 50°C again through the pipe P9.
leaked to.

At this time, the hydrogen pressure and temperature in the tank 129 are indicated by point T in FIG. 3(B), and the hydrogen pressure and temperature in the tank 125 are indicated by point υ in FIG. 3(B). In FIG. 3(B), the straight lines indicated by MC and MD are the hydrogen storage and dissociation lines of the hydrogen storage alloy. In reality, this straight line has a certain width, and at the same Q degree, the pressure becomes higher when hydrogen is absorbed, and the pressure becomes lower when hydrogen is desorbed.

Note that the hot water in the heating hot water heat exchanger 56 and the hot water in the hot water heat exchanger 62 are heated by steam from the fuel cell power generation device 50 and, if necessary, also by steam from the boiler 52.

Next, regarding the refrigerator 12, when most of the hydrogen stored in the second hydrogen storage alloy M2A and the first hydrogen storage alloy MIB is devolatilized, the operating direction is reversed. That is, solenoid valves ■3, ■4, ■9, VIO, Vll, V
12. Close V17 and V18, and solenoid valve V
1, V2, ■5, ■6, V15, V16, V19 and V
Open 2O. As a result, the hydrogen absorption/desorption exchanger 1
A forward operation similar to the forward operation performed in 4 is performed on the hydrogen absorption/removal heat exchanger 16, and a reverse operation similar to the reverse operation performed on the hydrogen absorption/removal exchanger 16 is performed on the hydrogen absorption/removal heat exchanger 16. This is done for the heat removal exchanger 14.

Further, regarding the water heater 120, when most of the hydrogen stored in the hydrogen storage alloy MC is devolatilized, the operating direction is reversed. That is, solenoid valves V41, V4
2. Close V45 and V46 and close solenoid valve V4.
0, V43, V44 and V47 open. As a result, the pressure inside the tank 129 is made low, and the pressure inside the tank 125 is made high pressure. Therefore, the hydrogen stored in the hydrogen storage alloy MD is devolatilized and passes through the solenoid valve 43, the compressor 130, and the solenoid valve V40 to the tank 12.
5 and is absorbed by hydrogen storage alloy MC, hydrogen storage alloy MD absorbs heat and hydrogen storage alloy MC generates heat.

On the other hand, low-temperature water from the fuel 1'l battery power generator 50 is piped into pipe P9.
, the hot water is heated to about 80°C through the heat exchange coil 122, and then passed through the pipe P11 and the heating coil 60 to heat the hot water in the hot water storage tank to about 60°C, and the cooled low-temperature water passes through the pipe P13 and the heat exchange coil. 12 (i) to heat the hydrogen storage alloy MD, and the low-temperature water that is further cooled by this is returned to the fuel cell power generation device 50 through pipes P52 and P51, and its exhaust heat causes the temperature to rise again to about 45 to 50°C. heated to
It flows out into pipe P9.

Therefore, hot water supply at about 60° C. and hot water for heating or cold water for cooling can be obtained simultaneously and continuously.

In addition, when switching between forward direction operation and reverse direction operation in a refrigerator, solenoid valve ■9, VIO or solenoid valves V15 and V16 are closed, but since cooling water is stored in the cold water tank 66', Cold water for air conditioning can be obtained continuously.

Next, the cooling/heating j71 water heater 10A of the second embodiment will be explained based on FIG.

In the air-conditioning/heating/hot water supply system 10 shown in FIG. 1, if the natural gas 48 runs out or the reheater 49 goes down, the fuel cell power generation system 50 cannot be operated. In order to solve this problem, in this second embodiment, the following configuration is added to the air conditioning/heating/hot water supply Δ device 1O shown in FIG. 1.

Solenoid valves V34 and V21 are interposed in the pipe connecting the reformer 49 and the fuel cell power generation device 50. A solenoid valve V22 and a compressor 98 are connected to the pipe connecting the solenoid valves V34 and V21 and the tank 94 in which the hydrogen storage alloy MH is stored.
is interposed. A solenoid valve V23 is interposed in a pipe connecting the tank 94 and a pipe connecting the solenoid valve V21 and the fuel cell all-electric equipment r50.

A heating coil 90 and a cooling coil 92 are provided within the tank 94. This heating coil 90 includes a pipe P30, a pipe P
It communicates with the inside of the hot water tank 95 via 31. Pipe P
31 is provided with a solenoid valve 24 and a pump 96. A heating coil 99 is provided in the hot water tank 95, and this heating coil 99 is connected to the pipe P34. Pipe P35
The wound heat exchanger 62 is connected to the wound heat exchanger 62. One end of the cooling coil 92 is connected to the cold water header 68 via a pipe P32.
The other end of the cooling coil 92 is connected to the cold water volume header 64 via a pipe P33. A solenoid valve V25 is installed in the pipe P33.

Next, the operation of the apparatus attached as described above will be explained.

At the start of operation, the solenoid valves V34 and 21 are opened, the solenoid valves V22 to V25 are closed, and the pump 96 and compressor 98 are turned off. In this state, the same operation as in the first embodiment is performed. .

When the power is under low load, the solenoid valve V22 is opened and the solenoid valve V25 is opened.

As a result, a part of the cold water cooled by the refrigerator 12 passes through the cold water outgoing header 68, the pipe P32, and the cooling coil 92, and the hydrogen storage alloy M II is cooled.

Therefore, hydrogen from the reformer 49 is stored in the hydrogen storage alloy M II. However, the amount of cold water is insufficient or
When the hydrogen storage reaction is slow, the compressor 98 is turned on to forcibly fill the MH tank 94 with rich hydrogen. When this 6m MI becomes sufficient or the power becomes a high load, solenoid valve ■22, V25
is closed, and the compressor 98 is also turned off.

Natural gas 48 is cut off due to an accident, or 4 times refurbished.
9 is down, close the solenoid valve V21 and close the solenoid valve V21. Open solenoid valve V23.24 and turn on pump 96. As a result, the hot water in the water tank 95 passes through the pipe P31 and the heating coil 90, the hydrogen storage alloy MH is heated, and the pressure inside the tank 94 is reduced, and the hydrogen stored in the hydrogen storage alloy MH is released. The fuel is stored and supplied to the fuel cell power generation unit 50.

Therefore, even if the supply of hydrogen from the reformer 49 is temporarily cut off in such an emergency, the fuel cell power generation device 50 can be continuously operated.

If the recovery is restored, open solenoid valve V21,
Close solenoid valves V23 and V24 and turn on pump 9G.
Turn off.

Next, a third embodiment of the present invention will be described based on FIG.

In the air-conditioning, heating and water-heating system Tll0B shown in Figure 1, there are cases where an auxiliary heat source such as a boiler is required due to the balance between the primary heat source capacity and the air-conditioning/hot-water supply load, making fire management difficult. There is also.

In order to solve this problem, in this third embodiment, the following configuration is added to the air-conditioning/heating/hot water supply apparatus IO shown in FIG. 1.

The electric power generated by the fuel cell all-electric equipment ff150 is also supplied to the heat recovery heat pump 104.

The heat recovery heat pump 104 includes a main heat exchanger 108 equipped with a coil 106, a side heat exchanger 112 equipped with a coil 11O, and an outside air heat exchanger 114.
The main heat exchanger 108 and the side heat exchanger 112 are composed of refrigerators, and the outside air heat exchanger 114 releases exhaust heat from the main heat exchanger 108 to the atmosphere or acquires heat from the atmosphere to the main heat exchanger 108. I do.

One end of the coil 106 and the hot water return header 72 are connected to the hot and cold water pipe P.
40 and the pipe P401, the pipe P40 and the cold water volume header 64 are connected by the pipe P41, and the other end of the coil 106 and the hot water header 74 are connected to the cold water pipe P42 and the pipe P4.
21, and the pipe P42 and the cold water tank 66 are connected by the pipe P4.
2 and the pipe P422, one end of the coil 110 and the hot water return header 72 are connected to the cold and hot water pipe P44 and the pipe P441, and the pipe P44 and the cold water return header 64 are connected to the pipe P4.
5, and the other end of the coil 110 and the hot water header 74 are connected by a cold/hot water pipe P46 and a pipe P461,
The pipe P46 and the cold water tank 66 are connected by a pipe P47. Pipe P41, Pd between the branch point of the pipe and each header
2, P47, P2O3, Pd21. Pd22, r'44
1. P2S5 are solenoid valves V26 to V3, respectively.
3 is interposed.

Next, the apparatus attached as above will be explained.

At the start of operation, the solenoid valves V26 to 33 are closed (and if there is a shortage of cold water from the freezer a12 or hot water from the 1g water heat exchanger 56, the valves are operated as follows.

In the case of main cooling operation, the main heat exchanger 10B cools the recirculated water, and when the side heat exchanger 112 heats the recirculated water, the solenoid valves V27, V29, 30, and V32 are opened. As a result, the recirculated water is transferred to pipe P41. P40, is cooled through the coil 106, becomes cold water, and flows into the pipes P42, P.
d22, a cold water tank 66, and a cold water outgoing header 68, and is used as cold water for air conditioning. Return heated water is pipe P441. Pipe P44
, is heated through the coil 110, becomes hot water, and enters the pipe P.
46, pipe P461, and hot water header 74 to be used as hot water for heating.

Next, in the case of heating main operation, the main heat exchanger 108 heats the return water, and the side heat exchanger 112 cools the return water, the solenoid valves V2G, V28, V31, and V33 are opened. As a result, hot water a is supplied to pipe P401 and pipe P40.
, is heated through the coil 106, becomes hot water, and flows into the pipe P.
42, pipe P421, and hot water header 74, and is used as hot water for heating. The return chilled water passes through the pipes P45, P44 and the coil 110, is cooled, becomes outgoing chilled water, and flows through the pipes P46,
P47, the cold water tank 66, and the cold water header 68, and is used as cold water for air conditioning.

Therefore, even if there is a shortage of cold water for cooling by the refrigerator 12 or hot water by the hot water heat exchanger 102i56,
By driving the heat recovery heat pump 104 with electric power from the fuel cell power generation device 50, sufficient cold water or hot water can be obtained.

Next, a fourth embodiment of the present invention will be described based on FIG.

This cold Ui room hot water supply! j device 1OC has both a device attached to the air-conditioning/heating-water supply device 1O in the above-mentioned air-conditioning/heating/hot-water supply unit 10A, and a device attached to the air-conditioning/heating/water-heating device 1O in the above-mentioned air-conditioning/heating/hot-water supply device 10B.

Therefore, in this fourth embodiment, the effects of the improvements in the second embodiment and the effects of the improvements in the third embodiment described above can be obtained.

[Effects of the Invention] ゛In the air-conditioning and hot water supply system according to the present invention, the water vapor obtained from the fuel cell power generation device as waste heat is supplied to the hydrogen absorption and desorption heat exchanger of the refrigerator as a heating heat source. Cold water is obtained, and at the same time, low-temperature water of about 40 to 50 °C obtained from the fuel cell generator as In heat is supplied to the hydrogen absorption and extraction heat exchanger of the water heater as a cooling heat source.
It has the excellent effect of increasing hot water supply by 11 times.

Moreover, by alternately operating the refrigerator and the water heater in the forward direction and in the reverse direction, there is an excellent effect that the hot water supply and the cooling column cold water can be continuously obtained.

In addition, the refrigerator and water heater can be operated by simply opening and closing the pulp connected to the heat exchange coil and electrically driving the compressor, so it is extremely easy to operate the refrigerator and water heater.
Furthermore, unlike a boiler, there is no need to periodically replenish fuel (1), handling is easy, and there is no fire source, so there is no need to consider fire prevention.

Furthermore, the thermal efficiency is much higher than when using an electric heater and an electric refrigerator to supply hot water and cool water for cooling, and there is an excellent effect that running costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a fluid circuit diagram showing the configuration of a first embodiment of the present invention;
Fig. 2 is a fluid circuit diagram of the refrigerator 12 showing valves not shown in Fig. 1, and Figs. 3 (A) and (B) show the hydrogen dissociation line of the hydrogen storage alloy as a function of the reciprocal of absolute temperature and the hydrogen 4 is a fluid circuit diagram showing the configuration of the second embodiment of the present invention, and FIG. 5 is a diagram showing the operating points of forward direction operation and reverse direction operation in relation to pressure. FIG. 6 is a fluid circuit diagram showing the configuration of a fourth embodiment of the present invention. 12... Refrigerator 14. 16... Hydrogen absorption and extraction heat exchanger 18. 24. 34. 42. 60... Heating coil 20.
28.36.40... Cooling coil 22.38... First tank 30.46... Second tank 50... Fuel cell power generator 52... Boiler 62... Heat exchanger for hot water supply 70...Cold IJl tower 94...Tank 98...Compressor 104...Heat recovery heat pump 120...Water heater 122.126...Heat exchange coil 124.12B...Hydrogen absorption/desorption heat exchange vessel 125.129
...Tank 130...Compressor

Claims (1)

[Claims] At the same temperature, a first hydrogen storage alloy (M1A, M1B) whose hydrogen dissociation pressure is a low pressure P_L and a second hydrogen storage alloy (where the dissociation pressure is a high pressure P_H (P_H>P_L)) M
2A, M2B) each have a heating coil (1
8, 34, 24, 42) and cooling coils (20, 36,
A hydrogen absorption/desorption heat exchanger (14, 16) is accommodated in a first tank (22, 38) and a second tank (30, 46) equipped with hydrogen absorbers (26, 44), and these two tanks are communicated with each other. A plurality of refrigerators (12) are provided, a fuel cell power generation device (50) that outputs exhaust heat as steam and low-temperature water, and a first hydrogen storage alloy that devolatilizes hydrogen from the second hydrogen storage alloy (M2A, M2B). In the forward direction operation in which hydrogen is stored in the storage alloys (M1A, M1B), the recirculated water for cooling is stored in the second tank (30,
46) and through the cooling coils (20, 36) of the first hydrogen storage alloy (M1A, M1B).
A, M1B) to devolatilize hydrogen from the second hydrogen storage alloy (M2
In the reverse direction operation in which hydrogen is stored in A, M2B), the vapor from the fuel cell power generator (50) is transferred to the first tank (22,
At the same time, the fluid is passed through the heating coils (18, 34) in the second tank (30, 46), and the fluid is passed through the cooling coil (26, 44) in the second tank (30, 46), and the fluid is passed through the heating coil (18, 34) in the second tank (30, 46). 1
4, 16) is operated in the forward direction, and at the same time, the remaining hydrogen absorption and desorption exchangers (14 or 16) are operated in the reverse direction, and the first operation is performed alternately between the forward direction operation and the reverse direction operation. A fluid connection circuit, a heating coil (60) provided in a hot water storage tank, a hot water supply heat exchanger (62) from which hot water flows out, and a tank (125,
At least one pair of hydrogen absorption/removal heat exchangers (124, 128) each having a heat exchange coil (122, 126) disposed in the interior (129) and containing a hydrogen storage alloy in the tank is provided. hydrogen absorption/desorption exchanger (124, 128
) are communicated via a compressor (130), and the compressor (130) is started, and the pressure in one of the communicated hydrogen absorption/removal heat exchangers (124 or 128) is higher than the hydrogen dissociation pressure. and the other hydrogen absorption/desorption heat exchange 21
Low-temperature water from the water heater (120) whose internal pressure is lower than the hydrogen dissociation pressure (128 or 24) and the fuel cell power generation device (50) is transferred to the hydrogen absorption/desorption exchanger (124 or 12) on the high pressure side.
8) through the heat exchange coil (122 or 126), then through the heating coil (60) of the hot water supply heat exchanger (62), and then through the hydrogen absorption/desorption exchanger (128 or 124) on the low pressure side.
) and a second fluid connection circuit that circulates through a heat exchange coil (126 or 122) of a fuel cell power generator (50).