JPS58179780A - Absorption type cold and hot water machine - Google Patents

Abstract

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

Description

[Detailed description of the invention] The present invention relates to an absorption type water chiller/heater.

When an absorption chiller/heater is used as air conditioning equipment for a building that requires both cooling and heating loads at the same time throughout the year, it is conventional to use a heating water heater with an absorption chiller. A take-out absorption type water cooler/heater is used. However, this simultaneous extraction type absorption chiller/heater has a so-called single/double composite absorption chiller that performs heat recovery, that is, a single-effect part that guides the refrigerant condensed in the water heater to the condenser, and a low-temperature regeneration using refrigerant vapor. An absorption chiller is used in combination with a dual-effect part that heats an intermediate concentration liquid in a regenerator. 4
That's about it. Furthermore, when a simultaneous recovery type absorption chiller is used and no heat recovery is performed, the coefficient of performance is approximately 1. Considering the zero-order load response, which is less efficient in both cases, the condenser In the so-called double operating power system, as shown in Figure 1, the condenser's heat input 11Q1 and the amount of human heat Q2 from the cold water load are Heat radiation amount Q3 and absorber radiation f
bUQ 4 forces are balanced, and in the next case using a dual-effect absorption chiller, approximately 1/2 of the chilled water load can be used for hot water. However, the conventional so-called double-bundle operation method alone cannot adequately cope with large hot water loads in winter. In the peat pump operation method described above, the heat radiation amount Q3 of the condenser and the heat radiation amount Q4 of the absorber are all recovered into hot water. Therefore, the hot water load can be used approximately twice as much as the cold water @load.

However, in the heat pump operation method, the cooling water in the normal cooling cycle is heated to 40°C, for example, II.
In order to output X, the amount of heat input to the high temperature regenerator is limited. Therefore, the maximum capacity on the cold water side is limited to, for example, about 40% of the rating, and therefore this heat pump) ii! The diversion system cannot adequately cope with the large cold water load in the summer.

The present invention solves the above-mentioned technical problems, and provides an absorption type water chiller/heater that has a coefficient of performance for all times and is designed to be able to switch the operating state according to chilled water load and mineral water negative (If). The purpose is to provide.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

Figure WI2 is a system diagram of one embodiment of the present invention. In this absorption chiller/heater, cold water cooled by the evaporator 2 of the double-effect absorption chiller 1 is supplied to the air conditioner 3, and hot water heated by the auxiliary compression type 5 is supplied to the heater 6. The so-called double-bundle operation mode, in which the cold water cooled by the evaporator 2 is fed to the air conditioner 3, and the hot water heated by the absorber 8 and #condenser 11 is fed to the heater 6, creates a one-bomber operation mode. , can be switched according to the size of each load. .

The three-direct effect type refrigerator 1 and the retractable type refrigerator 1 include an evaporator 2, an absorber 8, a high-temperature regenerator 9, and a low-temperature 4-generator 10. Jim Jim! a! ll, auxiliary #lll1l vessel 5, heat exchangers 12, 13, etc. The high temperature regenerator 9 has a conduit 14 equipped with a control valve 15.
For example, fuel such as city gas is supplied through the system, and its combustion heat is used as a heat source for the dual-effect absorption refrigeration system. The auxiliary condenser 8i15 is attached to the condenser 11Vc and communicated with the condenser ll.

In the chilled water circulation circuit 4, the inlets of the air conditioners 3 are commonly connected to the chilled water supply header 16, and the outlets of the air conditioners 3 are commonly connected to the chilled water return header 17. One end of the cold water return header 17 and the 7" coil 18 provided with the VC in the evaporator IIz are connected by a pipe line 20 equipped with a pump 19, and the female end of the coil 1B and the cold water supply header 16 are connected to the pipe WI21. In such a cold water circulation circuit 4, the cold water cooled by the fill 18 is supplied from the cold water supply header 16 to each cold water machine 3, where it is cooled and then released/discharged.
The water after 16 is circulated to the coil 18 by a pump 19 and cooled.

In the hot water circulation circuit 7, the inlets of the heaters 6 are commonly connected to the water supply header 22. Further, the outlet of each heater 6 is commonly connected to a hot water return header 23. Hot water) Coil 2 installed in the door header 23 and auxiliary #M device 5
One end of 4 is a dumper 25$) and (1) switching valve 411.
The coils 24 are connected by a pipe line 26, and the female end of the coil 24 is connected to the hot water supply header 22 via a pipe W127. In this Atsunaga circulation circuit 7, the hot water heated by the coil 24 is supplied from the water supply header 22 to each heater 6 and radiates the heat, and the water after radiating the heat is sent from the hot water return header 23 to the coil 24 by the pump 25. It is circulated.

There are coils 28 in absorption@B and #reduced type-5, respectively.
．． 29 are provided and these coils 28.29!
15 are interconnected by a conduit 30. Further, the coil 29 is connected to the cooling tower 32 via an electric line 31 provided with a switching valve 44 (+-), and the cooling tower 32 and the coil 28 are interconnected via a pipe line 34 provided with a pump 33 and a switching valve 45 in this order. In this way, a cold water circulation circuit 35 is constructed in which the cooling water cooled in the cooling tower 32 returns to the cooling tower 32 via the absorber 8 and the #&i device 11.

Cold water circulation circuit and pipe line 31Vcν coil 29 installation switching valve 4
A bypass conduit 37 is provided connecting the four lines, and a bypass control valve 38 is provided at the connection point 1' between the bypass conduit 37 and the conduit 31.

In the hot water circulation circuit 7, the pump 25 in the pipe line 26
One end of a pipe 39 having a switching valve 48 is connected to the switching valve 41 and Vcri, and the other end of the pipe 39 is connected to the downstream side of the switching valve 45 of the pipe 34 in the cooling water circulation circuit 35, that is, the coil It is connected closer to 28. Also, the bypass control valve 3 of the pipe line 31 in the cooling water circulation circuit 35
A pipe line 40 equipped with a switching valve 43 between the switching valve 8 and the switching valve 44.
One end of the pipe line 40 is connected, and the other end of the pipe line 40 is connected to the middle of the pipe line 27 in the wet water circulation circuit 7.

VcF'i above the high temperature regenerator 9 in the middle of the pipe line 53 leading out high temperature steam from the high temperature regenerator 9, branch pipe 5
A hot water heat exchanger 46 is connected via 4. The bottom of this hot water heat exchanger 46 has a discharge pipe 5 equipped with a drain control valve 47.
5 to a high temperature regenerator 9. A temperature detector 48 is provided in the middle of the pipe line 27 in the hot water circulation circuit 7, and the temperature detected by this temperature It detection I#48 is given to the temperature controller 49Vc. This temperature regulator 49
controls the opening degree of the drain J control valve 47 so that the temperature detection value becomes a preset value.

A switching valve 50 is provided downstream of the bypass control valve 38 in the cooling water loop 35.

One end of the coil 46m in the hot water heat exchanger 46 is connected to the upstream side of the switching valve 50 through a pipe 56t passing through the switching valve 521kU11. The other end S of the coil 46m is equipped with a switching valve 51. The switching valve 50 is connected to the downstream side of the switching valve 50 via a conduit 57.

In the absorption type water chiller/heater configured as described above, the operation mode when there is a load fluctuation as shown by the broken line in FIG. 3 will be described. First of all, when the load fluctuates like this, the range where the hot water load is relatively low, that is, the NIL of the downward slope to the left.
Double bundle operation is performed in the range shown by .

During this double pandle operation, the switching valves 42, 43, 5
Close valves 1 and 52, and switch valves 41, 44, 45.50t-
Open the valve. Therefore, the mineral water heated in the auxiliary stage III unit 5 is supplied to the warm-N unit 6 via the hot water circulation circuit 7t.
Evaporation! The cold water cooled in step 12 is passed through the cold water circulation circuit 4tl-
It is supplied to the air conditioner 3 through the air conditioner. Among these, when the load on the heater 6 is relatively low, the bypass control valve 38 is controlled to close the bypass pipe line 37. Therefore, cooling water ti
In the ring circuit 35, the large + 1i portion of the cooling water is #condensed type 11
The current flows through the coil 29 inside. Also, contrary to the above, KlflR
When the load on the machine 6 becomes large, the bypass control valve 38
T/'i Bypass line 37 is opened and controlled in the border direction. Most of the cooling water that flows through the cooling water circulation circuit 35Vc due to 7fLK bypasses the condenser 11, so the condenser 11
The condensed sl in is used for heating hot water in the auxiliary condenser 5.

In Figure t83, when the chilled water load is relatively low, the heat pump operation is performed within the range B indicated by the diagonal line on the right side.During this heat pump operation, the switching valve 4
1, 44, 45, and 51.52 are closed, and the switching valves 42.
43.50 is opened.

At the same time, the operation of the pump 33 is stopped.

In this way, the cooling water cooled by the evaporator 2 is supplied to the air conditioner 3 in the same manner as in the double panville operation mode described above. Makuntan FF4a6 has an absorber 8 and a condenser
Hot water heated at 411 is supplied. That is, the hot water after radiating heat in the heater 6 passes through the pump 25 and the pipe line 39, flows through the coil 28ν of the absorber 8 and the coil 29 of the condenser 11, is heated, and is heated via the pipe line 40 and the pipe line 27. It is supplied to machine 6. At this time, the bypass control valve 38 is controlled in a direction to close the bypass line 37.

Furthermore, when the heat pump is in operation, there is a load fluctuation as shown by the dashed line in FIG.
The valve i is closed, and the switching valves 42, 43, 51, and 52 are opened. In this way, the leaked water heated f-1 in the condenser 11 is further heated in the hot water heat exchanger 46 and sent to the hot water supply header 22. Therefore, when the cold water load is relatively low and the hot water load is relatively high, it is possible to cope with load fluctuations in range C. In addition, the hot water heat exchanger 46
In this case, the amount of high-temperature steam flowing into the hot water heat exchanger 46vc changes depending on the opening degree of the drain control valve 47 controlled by the humidity regulator 49, so the heating wax of hot water changes, and the hot water supply is controlled by -tVLK. The temperature of the hot water sent to the bottom sleeve 22 is maintained at the set temperature.

In the double bundle operation mode in range A, the fuel supplied to the high temperature regeneration 45 is controlled according to the cold water load, and fluctuations in the wet water load are dealt with by controlling the tj1 bypass control valve 38. . Also, when the heat pump is operating in range B, the cold water quality load and the hot water load are balanced on the balance line l shown by the two-dot chain line, but when the chilled water load is lower than the balance line l, the chilled water load is By applying heat due to a simulated load to the side and balancing it, the balance line! Hot water main line 11 above
#Can be for a range. In addition, at this time rma1
4! The amount of combustion in fI radiation regeneration 49 is controlled according to the hot water load. Furthermore, when the wet water load is low in Balance II/Equation, heat is radiated by a simulated load on the hot water load side, so that the balance line! It can correspond to the cold water main control range of Fno, and at this time the high-regenerator 9V'c
The amount of combustion to be calculated is calculated by cold water load. It will be done.

By switching between the sudden stop of the Vζ double-bundle operation and the two-pump operation in this way, the absorption type water chiller/heater can reduce the coefficient of performance of Kfl Unagi when double bundle JE to 1.
．． The coefficient of performance can be set to about 8, and the coefficient of performance can be set to about 3 when the toto pump is operated.

As another embodiment of the present invention, the middle of the pipe line 27 in the water circulation circuit 7 is connected to the water heat exchanger 46, and even during double bundle operation, the hot water heated by the auxiliary condenser 5 can be used as hot water. The heat exchanger 46 may be used for further heating. Then, as shown in Figure 4, in addition to range A,
It can also handle relatively high hot water loads.

Note that the water leakage heat exchange 446 may be omitted.

As described above, according to the present invention, in response to improving the quality of cold water load and wet water load, wet water is heated by the auxiliary condenser and supplied to the hot water load, and heated by the absorber and condenser. Since the famous water that was given to the hot water load is changed to 1 for the operator's cab, the coefficient of performance can be increased to the same level, and the operation that fully corresponds to the change of 1gIJVc for each load can be achieved. can.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the heat balance in a Vi pumping type cold/hot water model, Fig. 2 is a system diagram of an embodiment of the present invention, and Figs. 3 and 4 are graphs showing the relationship between n*4ir and the operating range. It is. l...double effect absorption refrigerator, 2...evaporator, 3.
...Cold man unit, 5...Auxiliary condenser, 6...Heater, 8
...Absorber, 9...11 Regenerator, lO...Niemu regenerator, 11...#Pongee, 39.40...Pipeline, 41,
42,43゜44.45,50,51.52...Switching valve, 46...Radiant water exchanger agent Patent attorney Kei Nishi Part 1 Figure 3 Cold water gas (o7.) 100

Claims (1)

[Claims] A driver who supplies cold water cooled by the evaporator of a TL+ absorption chiller to a chilled water load and supplies hot water heated by an auxiliary condenser attached to a condenser to a water heater M; The cold water cooled by the evaporator is given a cold water load VC, and the hot water heated by the absorber and the condenser is given a hot water load KFj-.
This is an absorption type water chiller/heater that features a switchable driver's cab. +21 gfJ The regenerator of the absorption chiller is equipped with a hot water heat exchanger to which high-temperature steam from the regenerator is guided, and the hot water heated by the condenser #I or auxiliary #condenser is guided to the hot water load. Claim 1, characterized in that means is provided in the middle of the pipe line for switchingably interposing the hot water heat exchanger between the hot water load and the IJ condenser or the auxiliary condenser. The absorption type water chiller/heater mentioned above.