JP2003262428A - Gas turbine-incorporated absorption refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve various problems regarding the use of electricity and heat for air conditioning. <P>SOLUTION: In this gas turbine absorption refrigerator using an absorption refrigerating cycle with double or more utility numbers, the combustion exhaust gas of a gas turbine is used in the thermal regeneration of an absorbing solution, and one or more of the heating gas introduction chamber of the regenerator of the absorption regenerating machine, a casing, and another casing surrounding both the absorption refrigerating machine and the gas turbine in an integral fashion are used as facilities for silencing the gas turbine. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improving the performance of an absorption chiller used for district heating / cooling and air conditioning by combining it with a gas turbine.

[0002]

2. Description of the Related Art Absorption chillers used for air conditioning are widely used as energy-saving and power-saving air-conditioning equipment because they can directly take out cold water from thermal energy produced by burning fuel. Recently, power is generated by a recip local engine (reciprocating engine) and a gas turbine,
Cogeneration, which uses the waste heat to drive an absorption chiller, is also becoming widespread in large-scale facilities. In addition, a micro gas turbine having an output of less than 300 kW has begun to be commercially available, and its waste heat is collected as hot water for hot water supply or as cold / hot water for air conditioning in a single-effect absorption refrigerator.

[0003]

However, the conventional absorption refrigerator and the cogeneration system using the same have the following problems. (1) Many absorption refrigerators consume power such as solution pump, refrigerant pump, chilled water pump, cooling water pump, cooling tower power, combustor blower, or control power, and the auxiliary power is for air conditioning. It could reach 30% of the total energy, and there were cases where it was not possible to thoroughly save power. (2) In the conventional cogeneration system, components such as a gas engine, a gas turbine, a boiler, and an absorption chiller / heater are supplied as a single item, and they are ducted locally.
Since it was connected by piping and wiring to form a system,
There is a drawback that the installation area is large and the site construction cost is high. Also, since each component is a single finished product,
There was a waste of duplication in soundproofing measures and maintenance space. (3) The power generated by cogeneration is usually used in grid connection with commercial power, and the facility cost for grid connection was high. (4) In a cogeneration system using a micro gas turbine, a regenerator is required to improve power generation efficiency, but the exhaust gas after leaving the regenerator has a temperature of 250.
It was difficult to drive the double-effect absorption refrigerating machine because the temperature was as low as ℃. In a relatively small cogeneration system using a micro gas turbine, the generated electricity and heat are often used for air conditioning. The present invention relates to electricity,
This is to solve the above-mentioned problem when heat is used for air conditioning.

[0004]

[Structure 1] A gas turbine built-in absorption refrigerating machine according to the present invention uses an absorption refrigerating cycle having a double or more utility number as described in claim 1. An absorption refrigerating machine that supplies all or part of its consumed heat and electric energy from a gas turbine, and the gas turbine is installed in the heating gas introduction chamber of the maximum temperature regenerator of the absorption refrigerating machine. The outlet of the expansion turbine or the regenerator that constitutes the unit is directly connected without using a flue to use the combustion exhaust gas for heating and regeneration of the absorption liquid (dilute solution), and the introduction of the heating gas for the regenerator of the absorption refrigerator. One or more of a chamber, a casing, or a casing that integrally surrounds both the absorption refrigerating machine and the gas turbine is used as a silencer for the gas turbine. [Operation and Effect] As in this configuration, when supplying all or part of the heat and electric energy required by the absorption refrigerator, from the gas turbine, the expansion turbine of the gas turbine or the regenerator outlet is directly absorbed by the refrigerator. If the flue gas is used for heating and regeneration of the absorbing liquid (dilute solution) in combination with the maximum temperature regenerator, the system can be economically constructed because there is no heat loss in the flue and no flue is required. it can.
Particularly, in the double-effect or more absorption type refrigerator, the temperature of the exhaust gas to be used is extremely high because it is necessary to regenerate the dilute solution at a temperature of 150 ° C. or higher. With this configuration, the double-effect absorption refrigerator can be driven by the gas turbine exhaust gas. Further, the outer casing of the absorption refrigeration machine and the heating gas introduction chamber of the maximum temperature regenerator (corresponding to the combustion chamber in the case of the direct-fired absorption refrigeration machine) may be used as part of the muffler equipment of the gas turbine. it can. Further, even when a soundproof casing (enclosure) surrounding the absorption refrigerating machine and the gas turbine is provided, it can be economically performed as compared with the case where they are provided individually. With the above effects, it is possible to achieve the problems (2) and (4) described above. [Structure 2] As described in claim 2, the gas turbine built-in absorption refrigerating machine according to the present invention uses an absorption refrigerating cycle having a double or more effective number of heat and electric energy consumption. It is an absorption refrigerator that supplies all or part of it with a gas turbine, and a heat exchanger is installed in the latter stage of a small gas turbine combustor. 2. The absorption refrigerating machine with a built-in gas turbine according to claim 1, wherein the system for applying heat is a feature. [Operation and Effect] In the invention of configuration 1, when using a gas turbine that does not use a regeneration cycle, the exhaust gas temperature is high,
Although this is an advantageous condition for the absorption refrigerator, there is a problem that the fuel consumption rate is high and the power generation efficiency is low because there is no regenerator. On the other hand, in the case of the micro gas turbine, there is a constraint that the temperature of the combustion gas must be lowered to the inlet allowable temperature (TIT; usually about 900 ° C.) due to the material constraint of the expansion turbine. Normally, in a gas turbine, the combustion gas is cooled to this temperature by diluting and cooling the combustion gas with compressed air obtained by a compressor. In the case of a gas turbine, the power required to produce compressed air is recovered by the expansion turbine, but the recovery rate is determined by the product of the adiabatic efficiency of the compressor and expansion turbine. In the case of a small gas turbine, the efficiency of each is about 80%, so even though it is partially recovered through heat,
% Is a loss. Therefore, in order to reduce the air ratio while keeping the turbine inlet temperature limit, a heat exchanger is installed in the latter stage of the combustor, and heat is given from the combustion gas to the exhaust side to cool the temperature of the combustion gas to TIT. For example, cooling of combustion gas and reduction of dilution air compression power can be achieved simultaneously,
The efficiency of the gas turbine is improved, and also for the absorption chiller, a high-temperature heat source can be obtained, which is extremely effective and efficient. With the above effects, it is possible to achieve the above-mentioned subject (4). [Structure 3] An absorption refrigerating machine with a built-in gas turbine according to the present invention has a solution pump and a refrigerant pump attached to an absorption refrigerating machine for generating electric power generated by a gas turbine-driven generator as described in claim 3. , Cold water pump, cooling water pump,
It is used for one or more of cooling tower power, auxiliary combustor blower, gas turbine fuel compressor power, and control power, and also has configuration 1 or configuration 2.
Is used. [Operation and effect] As in this configuration, the power generated by the gas turbine-driven generator is used to drive the solution pump, refrigerant pump, chilled water pump, cooling water pump, cooling tower power, blower power for auxiliary combustor attached to the absorption refrigerator. , Power supply for gas turbine fuel compressor, or power for control, it can be used for more than one purpose, which eliminates the need for complicated and expensive power control equipment such as grid connection. Allows operation separated from the power system.
This contributes to power saving of commercial power. When the gas turbine drives a high-speed generator, the generated high-frequency power is not converted into direct current and then converted into commercial frequency into alternating current. Instead, the direct current converted from the high-frequency power is directly supplied to these auxiliary devices. The output of these devices can be controlled by controlling the number of revolutions by supplying them to a DC motor to be driven or converting them to a required frequency and supplying them to an AC synchronous motor. As a result, not only the loss due to frequency conversion can be reduced, but also energy saving can be achieved by controlling the auxiliary equipment.

Due to the above effects, the above-mentioned problem (1)
And (3) can be achieved. [Structure 4] In the absorption chiller with a built-in gas turbine according to the present invention, as described in claim 4, the electric power generated by the generator driven by the gas turbine is required to be installed as an electric motor for driving the vapor compression chiller. It is characterized in that it is used as all or part of the electric power to be used and that the configuration 1 or the configuration 2 is used. [Effect] If the refrigeration equipment is a combination of a vapor absorption refrigeration machine and a vapor compression refrigeration machine and the gas turbine is installed in the absorption refrigeration machine as in this configuration, the heat dissipation loss from the flue will be eliminated and the absorption type Because the refrigerator can be double-effected,
The coefficient of performance (COP) that combines the two can be made excellent. In addition, this configuration is more adiabatic flue that costs more on-site than the case of directly driving the compression chiller with the power shaft of the gas turbine and guiding the gas turbine exhaust gas to the absorption chiller with the flue. It has an advantage that component devices can be connected by a cheaper electric wire. With the above effects, it is possible to achieve the above-mentioned subject (3). [Structure 5] An absorption chiller with a built-in gas turbine according to the present invention has the structure according to claim 1 or 2, and as described in claim 5, detects the temperature of cold water to be supplied for cooling. The output of the gas turbine is controlled by feeding back the gas turbine output, and the refrigeration output of the refrigerator is controlled by driving the vapor compression refrigerator installed in line with the amount of power generated by the gas turbine output. It is a control method for controlling the refrigerating output of the absorption refrigerator according to the amount of heat. [Operation and effect] As in this configuration, the temperature of the cold water supplied for cooling is detected and fed back to control the capacity of the gas turbine, and the attached vapor compression refrigerator is used to follow the electrical output generated by the gas turbine. By driving the electric motor in this way, the combined refrigerating output of the absorption refrigerating machine and the compression refrigerating machine can be controlled following the refrigerating load. The present control is particularly effective in a range in which the three types of component devices, that is, the gas turbine, the absorption refrigerator, and the compression refrigerator, operate (linearly) in proportion to the energy input by the fuel. In addition,
In areas outside the linear control range, it is also possible to reheat the regenerator of the absorption chiller with auxiliary fuel, or to supplementally supply power to the compression chiller from an external power source (through system cooperation). is there. With the above effects, it is possible to achieve the above-mentioned problems (1) and (3).

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas turbine built-in refrigerator according to the present invention will be described with reference to the drawings.

FIG. 1 is a schematic plan view of an embodiment relating to a gas turbine built-in refrigerator of the present invention. The micro gas turbine 100 is directly connected to the heating gas introduction chamber of the hottest regenerator of the absorption chiller 200 without a flue, and a portion exposed from the heating gas introduction chamber of the micro gas turbine is a dedicated one. It is insulated by the soundproof box 101. As a result, the temperature of the exhaust gas required for driving the double-effect absorption refrigerator and the noise reduction of the gas turbine are achieved at low cost.

FIG. 2 shows the structure of the absorption type refrigerator and the micro gas turbine which are the same as those of FIG. 1, but the enclosure 102 having a soundproof function which surrounds both the absorption type refrigerator and the micro gas turbine at the same time. Sound insulation. With this configuration, sound absorption of the absorption refrigerator and the micro gas turbine can be performed simultaneously. Further, by devising the structure of the enclosure, it is possible to configure so that the treatment and maintenance of the air taken in by the gas turbine can be performed easily.

FIG. 3 is a perspective view showing a state in which the micro gas turbine soundproof box of the micro gas turbine built-in absorption refrigeration machine or the micro gas turbine built-in absorption refrigeration enclosure in FIG. 1 or 2 is removed. It is a thing. A configuration is shown in which a micro gas turbine 100 including a compressor 1, an expansion turbine 2, a combustor 3, and a regenerator 4 is attached to a high-temperature regenerator 20 heating gas introduction chamber 21 of a double-effect absorption refrigerator 200. There is. Here, the high-temperature regenerator heating gas introduction chamber is a portion corresponding to the combustion chamber of the high-temperature regenerator in the direct-fired double-effect absorption refrigerator, and the direct-fired double-effect absorption refrigerator is diverted to the present invention. In that case, the burner of the refrigerator is removed, and a part of the burner mounting port is remodeled into a structure capable of mounting the gas turbine for use. Since the exhaust gas temperature of the gas turbine is lower than the temperature of the direct-burning combustion gas, in order to make the absorption refrigerating machine exhibit the same capacity as that of the direct-burning, the heat transfer pipe 22
It is necessary to increase the heat transfer area by adding more facilities. The gas turbine has a generator 5 driven by its output,
A fuel gas nozzle 6 and an air duct 7 are attached. Such a configuration becomes possible only by utilizing the characteristics that the gas turbine is smaller and lighter than the reciprocating engine of the same output and the waste heat is only exhaust gas.

FIG. 4 is an example of a flow chart of an absorption refrigerating machine incorporating a gas turbine. The left part of the figure is a gas turbine,
The central part is the high temperature regenerator functional component part, and the right part is the absorption refrigerator part. The description of the structure of the gas turbine part is the same as that described above, so the other parts will be described. The main part of the absorption refrigerator on the right side is composed of a low temperature regenerator 23, a condenser 24, an absorber 25 and an evaporator 26, and a solution pump 27,
The refrigerant pump 28, the heat exchangers 10 and 13 and the like are attached.

FIG. 5 is a flow chart showing an embodiment of the front part of the absorption refrigerating machine incorporating a gas turbine according to claim 2 of the present invention. The high-temperature exhaust gas (for example, about 1200 ° C) that has exited the gas turbine combustor is heated up to about 900 ° C according to the upper limit temperature limit of the turbine inlet by the heat exchanger installed in the latter stage (before the turbine inlet) of the combustor. The heat is removed. The heat is used to warm the exhaust gas temperature (for example, about 600 ° C. → 800 ° C.) by the heat exchanger installed between the turbine outlet and the absorption refrigerator.

By doing so, it is possible to improve the total efficiency of the gas turbine and the absorption refrigerator. Also, by adjusting and controlling the amount of combustion exhaust gas in the gas turbine combustor and the amount of heat exchange in the heat exchanger, it becomes possible to operate in response to load fluctuations on the absorption refrigerator side.

If the gas turbine output is controlled in proportion to the refrigeration load, the power generation output generated by the gas turbine changes in proportion to the refrigeration load in a certain load range, and at the same time, it is driven by its waste heat. The output of the absorption refrigerator also changes proportionally. In addition, the power consumption of the absorption chiller and the auxiliary equipment that constitutes the refrigeration equipment using the same also changes basically in proportion to the refrigeration load. Therefore, in the absorption refrigerating machine with a built-in gas turbine, supplying and consuming the electric power generated by the gas turbine to its own auxiliary equipment can reasonably complete the refrigeration equipment. FIG. 6 shows the absorption refrigerator 200 and its accessories. The main components of the auxiliary equipment are a solution pump 27, a refrigerant pump 28, a cold water pump 29, a cooling water pump 32, a cooling tower electric motor 31, an auxiliary combustor blower 9, a gas turbine fuel compressor power (not shown), and a control. There is power for the board 400 and the like.
When the gas turbine output power and the auxiliary machine power consumption do not balance, the following measures are taken. When the generated electric power becomes excessive, an electric heater is provided in the regenerator of the absorption chiller or a portion which performs its function (heating of the absorption liquid) and consumes it as a heat source. The generated energy can be effectively recovered in the air conditioner. When the generated power is constantly insufficient due to design, the commercial power shall be used in order from the auxiliary equipment suitable for commercial power usage. A device suitable for use with commercial power is a device whose operating frequency is preferably fixed to the commercial frequency, and examples thereof include a control panel 400 and a control device.
When the generated electric power is insufficient due to the partial load characteristics of the gas turbine generator, when the electric power is insufficient, the equipment suitable for commercial power use is sequentially switched to the commercial power for use.

The gas turbine generated power is preferentially supplied to auxiliary machinery (various pumps, etc.) in which it is advantageous to perform load control. Generally, when the generator driven by the gas turbine is a high-speed generator, the generated high-frequency AC is usually converted into DC by a converter and further converted into AC of commercial frequency by the inverter. However, if a DC motor is used as an auxiliary electric motor, the inverter can be omitted and load control can be easily performed by DC rotation speed control, and at the same time, the loss due to orthogonal power conversion can be reduced. When the electric motor of the auxiliary machine is an AC synchronous type, the rotation speed can be changed by controlling the AC frequency at the time of orthogonal conversion (so-called inverter control). It is possible to individually control each device to the required number of revolutions by distributing DC power to each accessory and converting each device to the required frequency. When the auxiliary machine is controlled in this manner, the electric power consumption of the auxiliary machine can be controlled so as to follow the gas turbine power generation amount in a substantially proportional manner. As shown in FIG. 7, the refrigerating equipment may be configured with a gas turbine built-in absorption refrigerating machine 200 and an electric vapor compression refrigerating machine 300 side by side. The electric power generated by the gas turbine is consumed for driving the electric motor of the compression refrigerator. Also in this case, the electric motor of the compression refrigerator can be driven and controlled by direct current or frequency control as in the above. It is possible to improve controllability while preventing loss due to frequency conversion of electricity. When the power generated by the gas turbine is smaller than the power consumed by the compression refrigerator, commercial power can be used together. In this case, the power generated by the gas turbine after converting commercial power to DC (after DC conversion)
The above-mentioned controllability improving effect can be obtained by cooperating with the above.

As shown in FIG. 7, when the refrigerating equipment is constituted by the gas turbine built-in absorption refrigerating machine 200 and the electric vapor compression refrigerating machine 300 side by side, the refrigeration load control is performed by the absorption refrigerating machine 200. The temperature of the cold water produced by the compression refrigerator 300 can be detected by the temperature sensor 401. The temperature is detected at a position after the cold water is mixed (for example, the cold water delivery header 402).

The capacity control of the gas turbine is performed by adjusting the fuel flow rate in inverse proportion to the cold water temperature. As a result, the compression refrigerator driven by the electric power generated by the gas turbine output and the absorption refrigerator driven by the gas turbine waste heat change their outputs in proportion to the capacity of the gas turbine. Therefore, as a result, both refrigeration equipments are load-controlled in inverse proportion to the cold water temperature. In addition,
The detected temperature may be the difference in temperature between the going and returning of cold water.
In this case, the capacity control of the gas turbine is performed in inverse proportion to the absolute value of the temperature difference.

The operation of the compression refrigerator 300 is shown in FIG.
Alternatively, the compressor may be directly driven by the shaft power of the gas turbine 100 as shown in FIG. Also in this case, in the operating range in which the output of the gas turbine is proportional to the fuel flow rate, the same control as above can be performed. [Other Embodiments] Although the present invention describes the use of refrigeration / cooling, an absorption refrigerator is used as an absorption chiller / heater (using a heating circuit) or an absorption heat pump, and a vapor compression refrigerator is used as a vapor compression heat pump. It can be applied to heating by switching the operation or by replacing the operation, and both can be used for cooling and heating.

[0018]

As described above, the absorption refrigerating machine with a built-in gas turbine according to the present invention is compared with a conventional cogeneration system in which a gas turbine and an absorption refrigerating machine are simply combined (see FIG. 9 for an example). , The following effects can be exhibited. With the configurations 1 and 2, the temperature of the exhaust gas of the gas turbine does not decrease, so that the required temperature of the high temperature regenerator can be secured when the absorption refrigerator has a double effect.

According to the constitution 1, the construction of the flue and its heat insulation is not necessary, which is economical. The gas introduction chamber for heating the high temperature regenerator can be used as a soundproof partition wall for gas turbine noise. In addition to the above, the exterior of the absorption refrigerator can be used as a soundproof partition. Alternatively, by covering the absorption refrigeration machine and the gas turbine with one common exterior, an enclosure with a soundproofing purpose can be constructed at low cost. According to the configuration 3, the electric power generated by the gas turbine can be utilized with good controllability by reducing the frequency conversion loss or converting it to an optimum frequency. From the configuration 4, the feature indicated by is effective when the generated power is used for its own auxiliary equipment or the compression refrigerator installed side by side.

According to configuration 5, the refrigerating load capacity of the absorption refrigerating machine with built-in gas turbine or the combined equipment of absorption refrigerating machine with built-in gas turbine and compression refrigerating machine is controlled by detecting the temperature of cold water supplied as refrigerating equipment. be able to.

[Brief description of drawings]

FIG. 1 is a schematic configuration plan view illustrating an example of a soundproof casing of an absorption refrigerating machine incorporating a gas turbine of the present invention.

FIG. 2 is a schematic configuration plan view for explaining another example of the soundproof casing of the absorption refrigerating machine incorporating a gas turbine of the present invention.

FIG. 3 is a schematic perspective view illustrating a configuration of a main part of an absorption refrigerating machine incorporating a gas turbine of the present invention.

FIG. 4 is a flow chart for explaining the configuration of main parts of the absorption refrigerating machine incorporating a gas turbine of the present invention.

FIG. 5 is a flow chart for explaining a main part configuration of an absorption chiller with a reverse regeneration cycle type gas turbine according to the present invention.

FIG. 6 is a schematic configuration diagram illustrating a configuration of an auxiliary device of an absorption refrigeration machine with a built-in gas turbine.

FIG. 7 is a schematic configuration diagram illustrating a configuration of an absorption chiller with a built-in gas turbine and a vapor compression chiller driven by the output of the turbine.

FIG. 8 is a schematic configuration diagram illustrating another configuration of an absorption chiller with a built-in gas turbine and a vapor compression chiller driven by the output of the turbine.

FIG. 9 is a schematic configuration diagram illustrating a conventional configuration of a gas turbine, an absorption chiller, and a vapor compression chiller driven by a gas turbine output.

[Explanation of symbols]

1 Compressor 2 Expansion Turbine 3 Combustor 4 Regenerator (Heat Exchanger) 5 Generator 6 Fuel Gas Nozzle 7 Air Duct 8 Heat Exchanger (1st Stage) 9 Auxiliary Combustor Blower 10 Heat Exchanger 11 Heat Exchanger ( 2nd stage) 12 gas-liquid separator 13 heat exchanger 14 heat exchanger 15 steam generator (heat exchanger with gas-liquid separator function) 20 high temperature regenerator 21 heating gas introduction chamber 22 heat exchanger (heat transfer tube) ) 23 low temperature regenerator 24 condenser 25 absorber 26 evaporator 27 solution pump 28 refrigerant pump 29 chilled water pump 30 cooling tower 31 cooling tower fan 32 cooling water pump 40 adiabatic flue 100 gas turbine 101 soundproof box 102 enclosure (soundproof casing) 200 absorption Refrigerator 300 vapor compression refrigerator 400 control panel 401 temperature sensor 402 cold water header (outgoing) 403 cold water Dah (return) 500 enclosure

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02G 5/04 F02G 5/04 P F25B 15/00 F25B 15/00 Z 303 303E 25/02 25/02 A // H02P 9/04 H02P 9/04 F P (72) Inventor Masahide Tsujishita 4-1-2, Hirano-cho, Chuo-ku, Osaka City Osaka Gas Co., Ltd. F-term (reference) 3L093 BB11 BB26 BB29 MM06 MM07 5H590 AA04 AA06 CA08 CA21 CC01 CD01 CD03 CE02 CE04 CE10 EA13 EA14 EB14 FA01 FA08 HA18

Claims (5)

[Claims] 1. An absorption refrigerating machine using an absorption refrigerating cycle having a double or more effective number, wherein the combustion exhaust gas of the gas turbine is used for heating and regenerating an absorption liquid, and the absorption refrigerating machine is regenerated. A gas turbine built-in absorption, characterized in that at least one of a gas introduction chamber for heating a vessel, a casing, and a casing that integrally surrounds both the absorption refrigerator and the gas turbine is used as a muffler for a gas turbine. Refrigerator. 2. The gas turbine built-in absorption system according to claim 1, wherein a heat exchanger is installed in the latter stage of the small gas turbine combustor, and a system for giving heat from the combustion gas to the exhaust side is configured in the opposite of the regeneration cycle. refrigerator. 3. A solution pump, a refrigerant pump, a chilled water pump, a cooling water pump, a cooling tower fan, a blower for an auxiliary combustor, and a gas turbine fuel compression, which are attached to an absorption chiller, to generate electric power generated by a gas turbine driven generator. The gas turbine built-in absorption refrigerating machine according to claim 1 or 2, wherein the absorption refrigerating machine incorporates a gas turbine and is used for one or more purposes of control power. 4. The absorption refrigerating machine with a built-in gas turbine according to claim 1, wherein the electric power generated by the generator driven by the gas turbine is used as all or part of the electric power of the electric motor for driving the vapor compression refrigerating machine. . 5. The capacity of the gas turbine is controlled by feeding back the temperature of the chilled water to be sent out, and the combined refrigerating output is controlled by driving the vapor compression refrigerator attached to the gas turbine so as to follow the output of the gas turbine. An absorption refrigerator with a built-in gas turbine according to item 1 or 2.