WO1996028699A1 - Cold water production apparatus and its refrigeration capacity control method - Google Patents

Cold water production apparatus and its refrigeration capacity control method Download PDF

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Publication number
WO1996028699A1
WO1996028699A1 PCT/JP1995/000399 JP9500399W WO9628699A1 WO 1996028699 A1 WO1996028699 A1 WO 1996028699A1 JP 9500399 W JP9500399 W JP 9500399W WO 9628699 A1 WO9628699 A1 WO 9628699A1
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WO
WIPO (PCT)
Prior art keywords
temperature
refrigerator
cold water
absorption
compression
Prior art date
Application number
PCT/JP1995/000399
Other languages
French (fr)
Japanese (ja)
Inventor
Ryohei Minowa
Kenichi Kuwabara
Shuichiro Uchida
Original Assignee
Hitachi, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP1995/000399 priority Critical patent/WO1996028699A1/en
Priority claimed from KR1019970706268A external-priority patent/KR100307071B1/en
Publication of WO1996028699A1 publication Critical patent/WO1996028699A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B25/00Machines, plant, or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/02Compression-sorption machines, plants, or systems

Abstract

This invention relates to a cold water production apparatus for producing cold water by a refrigerating machine. The present invention sequentially passes cold water through an evaporator (1) of a compression type refrigerator and an evaporator (8) of an absorption type refrigerator in the order named, detects the inlet of the absorption type refrigerator (outlet temperature of the compression type refrigerator) and controls both refrigerators on the basis of this detected temperature so that the load of the compression type refrigerator is always greater than that of the absorption type refrigerator. According to this construction, the load can be preferentially applied to the compression type refrigerator and an energy-saving operation can be carried out by making the most of the characteristics of the respective refrigerators.

Description

Akira fine harm

Cold water manufacturing apparatus and a refrigerating capacity controlling method art

The invention Kakariri in cold production So匮 and refrigeration capacity control method, and instrumentation S to produce cold water, especially combining the absorption chiller and compression refrigerating machine. BACKGROUND

In the instrumentation g of producing cold water in combination with a conventional compression refrigerating machine absorption refrigerator, when passing serially cold water into two refrigerators, absorption chillers, flow in the order of compression refrigerating machine, compression type control system for the coolant outlet temperature of the refrigerator at a constant level has been and. For example, JP-A-4 one 2 0 3 7 7 1 JP.

The above-mentioned conventional method, the temperature difference between the cooling water and cold compression refrigerating machine never change and when used alone compression refrigeration machine, and the operating system to flow the absorption refrigerator compressor refrigerator in series also, consumption 费動 force per unit cooling capacity of the compression-type refrigerating machine is not reduced. The absorption refrigerating machine, for placement in high cold temperature side, but pressurized ripening amount per unit cooling capacity is decreased, as shown in FIG. 4, compared with the compression type refrigerator, reduction ratio rather small, and a driving corresponding to beak load, since shorter operating time, energy saving effect is small drawbacks.

As the other conventional, cold water compression refrigerating machine, in order of absorption refrigerator there is a method to flow in series. For example, JP 5 8 1 2 9 1 7 2 JP can be mentioned up. In this manner, if the coolant outlet temperature of the cold water-producing device constant, absorption refrigerating machine base load corresponding, long become 髙 load operation, compression type refrigerator beak load corresponds, the short runs. In this case, compression type refrigerator for a short time operation and a re to the power ratio is higher fixed powered, the entire energy * has the drawback consisting 髙Ku.

Also, when using a turbo refrigerator compressor type refrigerator, from the design point temperature difference between the cooling water and the cold water, becomes more than a certain, since the surging occurs, can not be operated, coolant outlet temperature of the turbo chiller the shall be constant. Therefore, in order to maintain the coolant outlet temperature of the cold water-producing instrumentation constant, you must use the absorption chiller as the base load. Disclosure of the Invention

In conventional So匿 for manufacturing a cold water running cold water in series with two refrigerator compressor refrigerator and absorption refrigerating machines are not utilized characteristic of each of the refrigerator, a problem that not in energy-saving there were.

An object of the present invention combines the absorption refrigerator and compression type refrigerator, energy saving, is to obtain a cold water-producing instrumentation S and its refrigeration capacity control method it is possible to reduce the operation cost.

To achieve the above object, a first aspect of the present invention includes a compressor, a condenser, compressor refrigerator refrigeration cycle evaporator connected Ri by the refrigerant pipe is configured, the evaporator, absorber, condenser, connect the regenerator pipe, and an absorption chiller the refrigeration cycle and by re-connection to the channel has been configured, Ri in series by the previous Symbol both the refrigerator to the cold water pipe cold compression type refrigerator, the cold water-producing device has a configuration which flows in the order of the absorption chiller, an absorption refrigerator comprising: means for detecting the temperature of the cold water inlet, the absorption chiller load by re even compression refrigeration co setting the cold water temperature that increases the load on the machine, and a control means for the temperature of the cold water by being re detecting the means to control the refrigeration capacity of both the refrigerator so that the set temperature there to having. The second feature of the present invention includes a compressor, a condenser, compressor refrigerator refrigeration cycle evaporator connected Ri by the refrigerant pipe is configured, evaporator, absorber, condenser, regenerator piping, and a absorption chiller refrigerating cycle and by re SeMMitsuru the flow path is configured, the two refrigerator was SeMMitsuru by the Li series in cold water pipe cold water compression refrigerator, in cold water-producing device has a configuration which flows in the order of the absorption chiller, the compression-type refrigerator includes means for detecting a coolant outlet temperature of the compressor refrigerator, coolant outlet temperature detected by the means absorbing and a control means for controlling the refrigeration capacity of the compression refrigerating machine as well Li O load of formula refrigerator comprising a load of a compression type refrigerator largely be so that a set temperature, the absorption refrigerating machine, It means for detecting a coolant inlet temperature of the absorption refrigerator, this means Further comprising a control means for the cold water inlet temperature, which is re-detected to control the refrigeration capacity of the absorption chiller to be the set temperature so as to increase the load of the load by remote compression refrigerating machine absorption refrigerator It is in.

The third aspect of the present invention includes a compressor, a condenser, compressor refrigerator refrigeration cycle evaporator and re SeMMitsuru by the refrigerant pipe is configured, evaporator, absorber, condenser , piping regenerator, and a absorption chiller refrigerating cycle by connecting Ri by the flow path is configured, the two refrigerator was connected by the Li series in cold water pipe cold water compression refrigeration machine, in the cold water producing apparatus has a configuration which flows in the order of the absorption chiller, the compression-type refrigerator includes means for detecting a coolant outlet temperature of the compressor refrigerator, cold water outlet temperature by being re detecting this means load by Li absorption refrigerating machine may be one and a control means for controlling the refrigeration capacity of the compression refrigerating machine so that the load of the compression refrigerating machine increases to so that a set temperature, wherein said absorbent wherein the refrigerator includes means for detecting a coolant inlet temperature of the absorption refrigerator If, controls the refrigeration capacity of the absorption refrigerator as a cold water inlet mouth temperature by being re detected in this unit reaches the set temperature, such as to increase the load of the absorption refrigerator of the load by remote compression refrigerating machine be one and a control means for the inlet of the compression refrigerating machine or the means for detecting the cooling water temperature at the outlet, in accordance with the coolant temperature by being re detected in this section is increased, compression type raising the set temperature of the cold water inlet of the refrigerator in the cold water outlet temperature setting and the absorption chiller, according to the detected cooling water temperature is low down, the absorbent and the set temperature of the chilled water outlet of the compression-type refrigerator in that a control means for controlling so as to lower the set temperature of the coolant inlet of formula refrigerator.

Et al, and the fourth aspect of the present invention, a compressor, a condenser, a compressor refrigerator refrigeration cycle evaporator and re SeMMitsuru by the refrigerant piping is constructed, steam Hatsuki, absorption vessel, condenser, connect the regenerator pipe, and a absorption chiller refrigerating cycle by SeMMitsuru Ri by the flow path is configured in series the Ri by both refrigeration in cold water piping cold water compression type refrigerator, the refrigeration capacity control method of cold water producing instrumentation S that the flow Ru configuration in the order of the absorption refrigerating machine, the temperature of the cold water absorption chiller inlet, also the load by Li absorption refrigerating machine is to control the refrigeration capacity of the compression refrigerating machine load so that the set temperature, such as the increase in the respective refrigerator.

According to the present invention having the features of the first, second and 4 described above, a configuration in which flow of cold water for use in cooling the compression refrigerating machine, to al of flow in the order of the absorption chiller to air conditioning load , the temperature of the compression refrigerating machine outlet cold water (absorption refrigerator inlet cold water) detects, so as to control both the refrigerator as the sensed temperature reaches the set temperature, and the set temperature in La compression load of formula refrigerator you are with the temperature, such as always larger remote by the load of the absorption refrigerator. In general, compression-type refrigerator utilizes electrical, but tends to decrease abruptly when the power rate is the amount used increases. Since the use Ri preferentially by the absorption chiller compression type refrigerator in the present invention, it is possible to reduce the operating costs of the overall combined both refrigerator.

Further, the air-conditioning load varies in proportion to the general ambient temperature, typically for the cooling water which has received the waste heat from the refrigerator that is cooled by the cooling tower (coulis Ngutawa), cooling water inlet temperature of the refrigerator is also atmospheric temperature up and down depending on the. Accordingly, the cooling water inlet temperature of the refrigerator has the characteristics referred to above and below in accordance with the air conditioning load. According to the present invention having the third feature described above, empty 詷 when the load is reduced, compression refrigeration machine cooling water inlet or compression refrigerating machine depending on the outlet temperature and the absorption refrigerator intermediate cold water since Gosuru control to lower the temperature, the compression type refrigerator full load prolonged speed rolling, the absorption refrigerator can be used as a Mijikatoki between peak load. Comparing for cooling energy unit cost of the refrigerator of the electricity and gas is the energy source, if the cooling energy unit price electricity drove long time, below which the gas. Compression refrigerating machine by electrical, absorption type refrigerating machine can be operated with gas generally der Runode performs full load long-term operation of such a compression type refrigerator, preferentially a compression refrigeration machine Ri due to be used, it is possible to suppress the luck car cloud costs low.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a system diagram of a cold water-producing apparatus according to an embodiment of the present invention. Figure 2 is a system diagram of a cold water-producing apparatus according to another embodiment of the present invention. Figure 3 is a system diagram of a cold water-producing apparatus according to another embodiment et al of the present invention.

4 is a graph showing the 閱係 the input to the temperature difference and the refrigerator. Figure 5 is a Dara off showing the relationship between operating point and surge point of the turbo compressor.

6 is a graph showing the relationship between the operating point and efficiency of the turbo compressor. 7 is a graph showing the 閱 engagement of a compression refrigerator and an absorption refrigerator for load sharing and cold water temperature.

8 is a graph showing the relationship between the cooling energy cost per operation time.

BEST MODE FOR CARRYING OUT THE INVENTION

Combining absorption refrigerator and compression type refrigerator, the cold compression refrigerating machine, flowed in series in the order of the absorption chiller to detect an intermediate cold water temperature compression refrigerating machine and an absorption refrigerating machine, the temperature When There is Gosei the refrigerator respectively to be constant, compression refrigerating machine controls the coolant outlet temperature constant, general becomes the same as the control of cryocooler, if the coolant temperature is less design specifications compression ratio of the compressor of a compression type refrigerator is not to become excessive. Moreover, not high outside air temperature is higher in summer, when the cooling water temperature, etc. interim period is low, depending on the temperature difference between the cooling water temperature of the specification, the setting temperature of the controller for controlling the compression type refrigerator a decrease, the compression ratio of the compressor because it below the design value, it is operated was safe and cheap boss.

Attaching the temperature detector of the control unit for controlling the respective chiller cold water pipe between the two refrigerator, the set temperature of the controller of the absorption refrigerating machine, Ri by setting the temperature of the controller of the compression refrigerating machine always Ri by the be set higher, first load is applied to compression refrigeration machine, not be sufficiently cooled in compression refrigeration machine, the coolant outlet temperature of the compressor refrigerator is equal to or higher than the set temperature of the control device, absorption refrigerator control device is actuated, the load can take the absorption chiller.

When the load is small, operating only compression refrigeration machine, the load is increased, the output of the compression refrigerating machine starts the absorption refrigerator when has decreased to 1 0 0% output of a compression type refrigerator 1 0 When fixed at 0%, compression refrigerating machine is operating at full load, so that the shortfalls in the absorption chiller. Actually, the minimum refrigeration capacity can be communicated integrated driving the absorption chiller to ants. Absorption chiller fuel control system for opening or when the output of the controller is less than the minimum capacity, the compression refrigerating machine the control device is operated, adjusted to capabilities of the two refrigerator commensurate with the load, the load is increased, the output of the compression refrigerating machine is set to 1 0 0%, the output of the absorption refrigerator is minimum capacity when it becomes more, the output of the compression refrigerating machine is fixed to 1 0 0% control instrumentation S absorption refrigerating machine by actuating the output commensurate with the load, Binsaki load in compression type refrigerator to be over.

Hereinafter, a description will be given of an embodiment of the present invention by first view.

In Figure 1, 1 is the evaporator of the compression refrigerating machine, 2 compressor, the electric motive 3, condenser 4 compressor chiller, 5 compressor inflow refrigerant gas control downy one down, 6 control vane driving device, a refrigerant expansion valve of the compression-type refrigerator 7, the evaporator 8 is the absorption chiller, 9 absorber absorption chiller, 1 0 the absorption refrigeration machine condenser, 1 1 absorption refrigerator of the regenerator, 1 2 the fuel control valve, 1 3 fuel control valve actuating device, 1 4 fuel pipe, one fifth compression type refrigerator cooling water, 1 6 cooling device inlet cold water, 1 7 intermediate temperature cold water, 1 8 cool instrumentation 置出 port of cold water, 1 9 compression refrigerating machine temperature controllers, 2 0 absorption chiller inlet temperature controller, 2 1 absorption refrigerator outlet temperature controller, 2 2 compression refrigerator coolant temperature controller, 2 3 select calculator, 2 4 compression type refrigerator cold water outlet temperature sensor, 2 5 absorption refrigerator cold water inlet temperature sensor, 2 6 compression type Freezing machine cooling water inlet temperature sensor, 2 7 is an absorption refrigerator chilled water Atsushi Ideguchi sensor.

Cooling device inlet cold water 1 6 First enters the evaporator 1 of the compression type refrigerator, cooling to an intermediate temperature cold 1 7 next enters the evaporator 8 of the absorption refrigerator is cooled and et cooling device It flows out an outlet cold water 1 8. Compression refrigerating machine temperature adjusting meter 1 9 detects the temperature of the intermediate temperature cold 1 7 flowing out is cooled by the compression refrigerating machine by compression refrigerating machine coolant outlet temperature sensor 2 4, compressor inlet refrigerant gas control panes 5 supplies a control output to the control panes driving instrumentation 6 for opening and closing, the compressor inlet refrigerant gas control vane 5 is operated such that the set value the temperature of the temperature cold 1 7 between the medium is given . In the present embodiment, the flow cross-section ridge of the compressor suction side control base one down in the variable, performs the compression refrigerating machine capacity control, and the rotational speed of the compressor variable, compressor speed can also this to perform the control performs compression refrigerator capacity control.

Absorption chiller inlet temperature adjusting meter 2 0, the temperature of the intermediate temperature cold 1 7 is detected by absorption Osamushiki refrigerator cold water inlet temperature sensor 2 5, to open and close the fuel control valve 1 second absorption chiller fuel a control output to the control valve drive unit 1 3 supplied through 逮択 calculator 2 3, the fuel control valve drive unit 1 3 is operated such that the set value the temperature of the intermediate temperature cold 1 7 is given.

Absorption chiller outlet temperature adjusting meter 2 1, the cooling device the temperature of the outlet chilled water 1 8 detected by the absorption chiller coolant outlet temperature sensor 2 7, select calculator 2 3 close signal When next lower below the set temperature give in. Selection calculator 2 3, the absorption chiller inlet temperature adjusting meter 2 0, 2 1 compares the output signal of the absorption chiller outlet temperature 詷節 thermometer, lower 1 3 fuel selects the signal give to the control valve drive equipment.

Compression refrigerating machine coolant temperature adjusting meter 2 2 the inlet temperature of the cooling water 1 5 of compression refrigerating machine is detected by the compression refrigeration machine cooling water inlet temperature sensor 2 6, the cooling water 1 compression chiller 5 of the changed value of the inlet temperature, 剌算 the ratio defined, compression refrigerating machine temperature adjusting meter 1 9, changes the set value of the absorption chiller inlet temperature adjusting meter 2 0. When the temperature drop = to the cooling water inlet temperature one coolant outlet temperature ... (1) such a structure, small temperature difference shown in the above equation (1) in a compression refrigerating machine no longer, as shown in Figure 4, because the compression refrigerating machine is approximately equal to the input in proportion to the decrease of temperature difference (power required) is reduced, the absorption chiller has a characteristic that a decrease in the drive input in comparison to the compression type refrigerator is small, drive input of the total absorption refrigerating machine and a compression type refrigerator Ru can be very small.

The set value of the compression-type refrigerator of cold compression refrigerating machine temperature adjusting meter 1-9 the intermediate temperature cold 1 7 serving as the outlet temperature controlled to be the set temperature, compressor refrigerator inlet of the cooling water 1 5 Ri by the changing in accordance with the ratio of the temperature has changed, the temperature drop of the compression refrigerating machine can be made constant, rather by efficient compression refrigerator can be operated.

When using the turbo compressor to the compressor, cooling water Lowering the coolant outlet temperature when the inlet temperature is high, the compression ratio is high as Li, operating point as shown in Figure 5 is the design point A Yo Li high point B to transfer, since there is characteristic impossible OPERATION Te near summer to surging point, making the compression ratio below a certain level is particularly important.

Further, by using the turbo compressor to the compressor, a maximum compression ratio of the turbo compressor, be designed with the compression ratio that can be cooled to a temperature of the cooling device outlet chilled water 1 8, the temperature of the intermediate temperature cold 1 7 coolant temperature regardless, it can be changed, FIG. 6 of the points C and D Li such that it operates between, at full load, since that will operate at poor point D efficiency, large driving force is required Become.

The turbo compressor, compressor refrigerator and absorption refrigerator, when designed to correspond to a compression ratio of cooling to an intermediate temperature cold 1 7 Temperature of the time you operated at full load, the characteristics of the turbocompressor look like the dotted line in FIG. 6, the efficiency of the operating point D at full load is increased by a large margin to d 'from d, 勖力 it decreases substantially in proportion to the temperature difference.

To avoid the compression ratio of the work 勛点 of the turbo compressor to the sixth or D point of view, the inlet temperature of the cooling water 1 5 of compression refrigerating machine according to a value decreased Ri by the design value, the compression It is reducing the set temperature of the formula refrigerator temperature adjusting meter 1 9 so that Bayoi.

Air conditioning load is changed in proportion to the general ambient temperature, generally cooling water because it has cooled in the cooling tower, the cooling water temperature is also lower with it ambient temperature. Was but connexion, air-conditioning load is decreased, when the temperature of the cooling device inlet cold water 1 6 returning from the air-conditioning load side came down, the cooling water temperature is also down, compression refrigerating machine coolant 1 by lowering the set temperature of the intermediate temperature cold 1 7 of compression refrigerating machine temperature adjusting meter 1 9 with a decrease of 5 in the inlet temperature, so that the compression type refrigerator is always operated at substantially full load.

Absorption refrigerating machine, the temperature of the intermediate temperature cold 1 7 detected by the absorption chiller cold water inlet temperature sensor 2 5, so that the temperature becomes constant, Ri by the absorption chiller coolant inlet temperature adjusting meter 2 0 It is controlled. Accordingly, the temperature of the load is reduced and the cooling device outlet chilled water 1 8 rises and approaches the temperature of the intermediate temperature cold 1 7. With such a control, the absorption chiller also because the cold water temperature drop of the cooling water is rather small driving force is reduced and energy saving. Absorption refrigerator cold water inlet temperature adjusting meter 2 0, like the compression-type refrigerator temperature adjusting meter 1 9, although the set value the temperature of the cooling water 1 5 of compression refrigerating machine is changed, always compression refrigeration Ri by setting value of the machine for temperature adjusting meter 1 9, it is set to absorption Osamushiki refrigerator cold water inlet temperature adjusting meter 2 0 slightly higher temperatures Unisuru. In this way, first compression refrigerating machine becomes full load, more load than the capability of the compression refrigerator, the temperature of the intermediate temperature cold 1 7 or the set value of the compression refrigerating machine temperature adjusting meter 1 9 from the a connexion, absorption chillers cold water inlet temperature adjusting meter 2 0 is activated, the absorption chiller fuel pipe 1 4 increases the flow Ru fuel, capacity shortage of the compression refrigerating machine to a load It will be'll compensate for the sea urchin operation.

Coolant outlet temperature control meter 2 1 absorption refrigerating machine, the temperature of the cooling instrumentation S outlet cold water 1 8, detected by the absorption chiller coolant outlet temperature sensor 2 7 Once falls below a set value, the fuel control valve 1 2 Close to output a control signal direction. Selection calculator 2 3 and the output signal of the absorption refrigerator cold water inlet temperature adjusting meter 2 0, compares the output signal of the intake Osamushiki refrigerator coolant outlet temperature adjusting meter 2 1, the fuel control valve 1 2 closing direction and it outputs the signal to 勳装 ffi 1 3 drive by selecting the signal the fuel control valve. Therefore, the this down temperature of the cooling device the coolant outlet 1 8 Ri by setting value, That re supercooling can be prevented.

When shown in the figure that has been described above is as Figure 7.

Load 1 0 0% Badai sends seven cold water to the air conditioning load (R point), that go back from the air conditioning load at 1 4 ° C (P point). If the load is 0%, the cold water feed at 8 ° C in the air conditioning load, that go back at 8 ° C at the same temperature from the air conditioning load (Z point).

If the load is 1 0 0% cold water came back with the air conditioning load by Li 1 4 ° C (P point), compression type refrigerator 3 at its maximum capacity. 5 lowered 1 0. And 5 ° C and (Q point), 0 1 is et to absorption chiller is its maximum capacity. 5 big et al.3. 5 lowered 7 'C and then sent to the air conditioning load (R point).

When the load is that going down, the temperature of the cold water that has returned Ri by the air-conditioning load is low when compared at load 1 0 0% (for example, point S). Then, the load 1 0 0% at and about the maximum capacity of the compression refrigerating machine as well 3. 5 'C lowered the T point, the capacity control of the absorption chiller to be al cooled to U point, air-conditioning and it sends it to the load. Thus it is such One such preferential load compression refrigerating machine according the present invention.

Load will be able to cope with only the maximum capacity of the stop and the absorption chiller to be around 4-6% compression type refrigerator (W from point V point).

Further load drops, the corresponding only compression refrigerating machine and capacity control (for example, Y point from the X point).

As shown in FIG. 7, the load on the compression refrigerating machine in the entire range of operation is applied to the priority, the compression refrigerating machine for a long time at a high load operation. Absorption refrigerating machine, Li such that it operates only during peak load, the short runs. The place is located in the middle 鞣度 such as Japan, summer cooling load of the year average, is about 4 0% of the peak load. Therefore, the operating capacity of the compression type refrigerator, when selected to 4 0% to 50% of the total volume of the compression-type refrigerating machine and the absorption refrigerating machine, a compression type refrigerator is about half of annual operating time at full load it to a re to, overall efficiency is 髙Ku.

Figure 2 is a diagram showing another embodiment of the present invention. The outlet temperature of the cooling water 1 5 of compression refrigerating machine is detected by the compression refrigeration machine cooling water outlet temperature sensor 2 8, and controls similar to the embodiment of Figure 1, temperature controller for a compression type refrigerator 1 9, the set value of the absorption refrigerator cold water inlet temperature adjusting meter 2 0, Ri by the altering the outlet temperature of the cooling water 1 5, embodiment the same effect of the first view is obtained.

Figure 3 is a diagram showing another alternative embodiment of the present invention. The absorption refrigeration machine using the one that the steam as a driving source, a steam inlet flow through the steam pipe 3 1 and controls the steam control valve 2 9, and the steam control valve drive assistant device 3 0 , the same effect as the embodiment of Figure 1 is obtained.

According to the present invention, compression type refrigerator and absorption refrigerator the cold water compression type refrigerator, Ri by the combining to cool in order of absorption chiller, temperature drop of the compression refrigerating machine (cooling water inlet temperature one coolant outlet temperature) is small no longer, the driving 勳勛 force greatly small Kudekiru.

Generally, since compression type refrigerator is Ka勳 by an electric motor, the reduction of the driving 勳力 the base charge power becomes a fixed fee is cheaper, to reduce the running costs Togadai width.

Further, when the load is decreased, the temperature of the intermediate temperature cold compression refrigerating machine and an absorption refrigerator Ri by the lowering in accordance with the coolant temperature, the compression type refrigerator full load long-term operation, absorption in the refrigerator and for a short period of time beak load can be used. Doing so operating, Badai, as shown in FIG. 8, since the high power of fixed costs borne by comprising Li and cheap, such that prolonged use for driving particular compression refrigerator in electric motive, Running costs can be reduced by a large margin. Incidentally, FIG. 8 is the power in the 3 0 0 RT refrigerator 1. O k WZRT, the gas is obtained by 0. Estimated assuming at 6 5 N m 3 ZRT.

In general, compression-type refrigerating machine but through the use of electrical, power rates are imposing a load by using the compression refrigeration machine because there is a tendency to decrease rapidly when the amount of use increases the absorption chiller by the Li priority especially good is, both the refrigerator can be the entire operation costs I reduced the combined.

The change of the coolant temperature and the air conditioning load is characterized there Ru that are linked. If the air conditioning load is reduced, since the control to lower the intermediate cold water temperatures of the compression chiller absorption refrigerator according to the coolant temperature of the compression type refrigerator, full load long-term operation of the compression type refrigerator to, it may be used in the absorption chiller with short peak load for. Comparing the electrical and cooling for energy price of gas is the energy source of the refrigerator, if the cooling energy unit price electricity that long-term speed rolling, below which the gas.圧綸 refrigerator is an electric, the absorption chiller is generally be operated at a gas performs full load long-term operation of such a compression type refrigerator, a compression type refrigerator invasion destination to Ri due to be used, it is possible to reduce the operation cost.

Claims

The scope of the claims
1. Compressor, a condenser, an evaporator and refrigerant piping by compression refrigerating machine Li SeMMitsuru to refrigeration cycle is configured, the evaporator, absorber, condenser, regenerator piping, the flow path and a by re SeMMitsuru to refrigeration cycle absorption chiller that is configured to flow the two refrigerator Senneri cold water compression chillers in series by cold water pipe, in order of absorption chiller Oite the configuration and the cold water-producing apparatus, and means for detecting the cold water temperature of the absorption chiller inlet, the cold water temperature, such as to increase the load of the load by remote compression refrigerating machine absorption chillers sets a cold water manufacturing apparatus characterized by a control means for the temperature of the cold water by being re detecting the means to control the refrigeration capacity of both the refrigerator so that the set temperature.
2. Control means for controlling the refrigeration capacity of each chiller, and a control means for controlling the heat input of the regenerator of the absorption type refrigerating machine, controls the suction side flow path cross-sectional area of ​​the compressor of a compression type refrigerator cold water production apparatus according to claim 1, characterized in that a control means for controlling the rotation speed of the control means or compressors.
3. Inlet of compression refrigerating machine or the means for detecting the coolant temperature at the outlet, in accordance with the coolant temperature and the detected rises, raising the cold water set temperature of the absorption chiller inlet, the detection was in accordance with the coolant temperature decreases, the cold water-producing apparatus according to claim 1, characterized in that a control means for so that control lowers the cold water set temperature of the absorption chiller inlet .
4. Accordance detected cooling water temperature rises, raising the cold water set temperature of the absorption chiller inlet mouth, the detected cooling water temperature is Runishitagatte be lowered, absorption refrigerator inlet of cold water control means for controlling so as to lower the set temperature, the inlet of the compression refrigerating machine or by receiving a signal of the coolant temperature at the outlet, transmits a control signal to the control means for controlling the refrigerating capacity of the respective refrigerators cold water production apparatus according to claim 3 to Toku撖 that consist temperature controller to.
5. A compressor, a condenser, an evaporator and refrigerant piping by compression refrigerating machine Li SeMMitsuru to refrigeration cycle is configured, the evaporator, absorber, condenser, regenerator piping, the flow path I then re SeMMitsuru in and an absorption chiller refrigerating cycle is configured, the two refrigerator was SeMMitsuru by the Li series in cold water pipe cold compression type refrigerator, the absorption refrigerator Oite cold water production instrumentation S which was sequentially flows configuration, the compression type refrigerator, a means that detecting the coolant outlet temperature of the compressor refrigerator, by re detected coolant outlet temperature absorption refrigeration in this section and control means for controlling the refrigeration capacity of the sea urchin by reach the set temperature compression refrigerating machine so as to increase the load of the load by remote compression refrigerating machine of the machine, said absorption chiller is an absorption chiller the means for detecting the cold water inlet temperature, coolant inlet temperature, which is by re detected in this manual step Cold water-producing but, characterized in that it comprises a control means for controlling the refrigeration capacity of the absorption chiller to be made to the size Kusuru such setting temperature load of a compression type refrigerator Li O load absorption chiller apparatus.
6. Control means for controlling the refrigeration capacity of the compression type refrigerator has a control unit for controlling the rotation speed of the control unit or the compressor to control the suction side flow passage cross section somewhat of a compressor of a compression type refrigerator, control means for controlling the refrigeration capacity of the absorption refrigerating machine, cold production according to claim 5, characterized in Rukoto which have a control means for controlling the heat input of the regenerator of an absorption refrigerator apparatus.
7. Inlet of compression refrigerating machine or the means for detecting the coolant temperature at the outlet, the following detected cooling water temperature rises, the set temperature of the chilled water outlet of the compression-type refrigerating machine and an absorption refrigerator coolant inlet of raising the set temperature in accordance with the coolant temperature decreases with the detected, set temperature of the set temperature and the absorption refrigerator cold inlet port of the coolant outlet of the compression-type refrigerator cold water production apparatus according to claim 5, characterized in that a control means for controlling so as to decrease the.
8. Accordance detected cooling water temperature rises, raising the cold water inlet of the set temperature of the set temperature of the chilled water outlet of the compression-type refrigerating machine and an absorption refrigerator, the cooling water temperature with the detected reduced according to the control means for controlling so as to decrease the compression formula set temperature and the absorption refrigerator coolant inlet of the set temperature of the chilled water outlet of the refrigerator, the compression refrigerating machine inlet or outlet, receiving a signal of the cooling water temperature, cold water range of Kisai seventh preceding claims, characterized in that have a temperature controller for transmitting a control signal to the control means for controlling the refrigerating capacity of the respective refrigerators Manufacturing equipment.
9. O load of a compression type refrigerator also increases Ri by load absorption chiller urchin, compressor refrigerator chilled water outlet of the set temperature by re-setting temperature of the absorption refrigerator cold water inlet Ki截 cold water production apparatus in the range 7 of claims, characterized that you have a control means for controlling to be higher.
1 0. Compression refrigerating machine Ri by setting temperature of the chilled water outlet, control means for controlling so that the set temperature of the absorption refrigerator coolant inlet is increased, the inlet of the compressor refrigerator or cooling water outlet, receives the temperature signal, the cold water-producing apparatus according to claim 9, characterized in that it consists of temperature controller for transmitting a control signal to the control means for controlling the refrigeration capacity of their respective refrigerators .
1 1. Claims a load absorption refrigerating machine when the lower limit by Li large listening volume control of the absorption chiller, and Toku撖 further comprising a control means for controlling so as to operate the compression refrigeration machine at full load the first term in the range or cold water production apparatus according to paragraph 5.
1 2. And means for outputting a signal by detecting the absorption refrigerator cold water inlet temperature, and means for outputting a signal by detecting the absorption refrigerator coolant outlet temperature, compared to receive these two signals low and comparison operation means for selecting a temperature signal towards a signal, refrigeration capacity of absorption chillers to received the absorption chiller coolant outlet temperature signal from the comparison 湞箅 means does not drop to abnormally cold water production apparatus according to paragraph 1 to claim 5, characterized in that a control means for controlling the amount.
1 3. The maximum cooling capacity of the compression refrigerating machine, and characterized in that a 50% from 4 0% of the refrigeration capacity of the combined maximum refrigeration capacity of up refrigeration capacity of a compression refrigerator and an absorption refrigerator cold water production apparatus according to paragraph 1 to claim 5 for.
1 4. Compressor, a condenser, an evaporator and a refrigerant pipe Nyo re connected to refrigeration cycle compression refrigerating machine cycle is configured, the evaporator, absorber, condenser, playback device a pipe, the flow path and a by Ri connected to absorption chiller refrigerating cycle is configured to flow the both freezer connected to the cold water pipe Nyo Li series cold compression type refrigerator, in order of absorption chiller configuration in the cold water-producing instrumentation that was, the compression-type refrigerator includes means for detecting a coolant outlet temperature of the compressor refrigerator, the detected coolant outlet temperature Ri by this means absorption chiller load by remote compressed be one and a control means for controlling the refrigeration capacity of the compression refrigerating machine so that the set temperature so as to increase the load of the formula refrigerator, the absorption refrigerating machine, cold water inlet of the absorption refrigerator and means that detecting the temperature, by re-detection of this means Cold water inlet temperature der those and control means for controlling the refrigeration capacity of absorption chillers load by remote by that the set temperature as the increased load of the compression refrigerating machine urchin absorption refrigerator connexion inlet of a compression refrigerator or a means for detecting the coolant temperature at the outlet, in accordance with the coolant temperature by being re detected in this section is increased, the set temperature of the chilled water outlet of the compression-type refrigerating machine and the absorption type, raising the cold water inlet of the set temperature of the refrigerator, in accordance with the detected cooling water temperature decreases, the lower the pre SL cold water inlet of the set temperature of the temperature setting and the absorption refrigerator coolant outlet of the compression type refrigerator cold water-producing device you; and a control means for controlling so.
1 5. Compressor, a condenser, and an evaporator connected Ri by the refrigerant piping to refrigeration cycle compression refrigerating machine cycle is configured, the evaporator, absorber, condenser, playback unit piping, flow and a absorption refrigerating machine by the road by re SeMMitsuru refrigeration cycle is configured, the two refrigerator was SeMMitsuru by the Li series in cold water pipe cold compression type refrigerator, an absorption refrigerator the refrigerating capacity control method of the cold producing device has a configuration which flows in the order, the temperature of the cold water absorption chiller inlet, load size setting, such as Kusuru of the intake Osamushiki refrigerator load by remote compression refrigerating machine frozen capacity control method of the cold producing device and controls the respective refrigerating capacity of the refrigerator so that the temperature.
1 6. A method of controlling the refrigeration capacity of each chiller, and a control means for controlling the human heat regenerator of an absorption refrigerator, a control for controlling the inlet cross-sectional area of ​​the compressor of a compression type refrigerator cold water manufacturing apparatus. refrigerating capacity control method according to the first 5 wherein claims, characterized in that performing by the control means that controls the rotational speed of the means or the compressor.
1 7. Inlet of compressor refrigerator or thus the cooling water temperature at the outlet increases, raising the cold water set temperature of the absorption chiller inlet, according to the cooling water temperature decreases, the setting of the It has been frozen capacity control method of cold water manufacturing equipment according to the first 5 wherein claims, characterized in that the control to lower the temperature.
PCT/JP1995/000399 1995-03-10 1995-03-10 Cold water production apparatus and its refrigeration capacity control method WO1996028699A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1995/000399 WO1996028699A1 (en) 1995-03-10 1995-03-10 Cold water production apparatus and its refrigeration capacity control method

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1019970706268A KR100307071B1 (en) 1995-03-10 Cold water producing refrigerating apparatus and method of controlling cooling capacity thereof
PCT/JP1995/000399 WO1996028699A1 (en) 1995-03-10 1995-03-10 Cold water production apparatus and its refrigeration capacity control method
JP08527435A JP3125796B2 (en) 1995-03-10 1995-03-10 The cold water-producing equipment

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WO1996028699A1 true WO1996028699A1 (en) 1996-09-19

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JP (1) JP3125796B2 (en)
WO (1) WO1996028699A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013160440A (en) * 2012-02-06 2013-08-19 Hitachi Appliances Inc Turbo refrigerator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5849872A (en) * 1981-09-18 1983-03-24 Hitachi Ltd Heat pump device
JPS58129172A (en) * 1982-01-29 1983-08-02 Hitachi Ltd Cooling facility

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5849872A (en) * 1981-09-18 1983-03-24 Hitachi Ltd Heat pump device
JPS58129172A (en) * 1982-01-29 1983-08-02 Hitachi Ltd Cooling facility

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013160440A (en) * 2012-02-06 2013-08-19 Hitachi Appliances Inc Turbo refrigerator

Also Published As

Publication number Publication date
KR19980702861A (en) 1998-08-05
JP3125796B2 (en) 2001-01-22

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