EP3775744A1

EP3775744A1 - Method and device for compressing a gas

Info

Publication number: EP3775744A1
Application number: EP19746031.4A
Authority: EP
Inventors: Vladimir Danov; Florian REISSNER; Jochen SCHÄFER
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2018-07-24
Filing date: 2019-07-17
Publication date: 2021-02-17
Also published as: KR102516704B1; KR20210018494A; JP7130840B2; EP3599440A1; WO2020020720A1; US20210301836A1; JP2022511228A

Abstract

The invention relates to a method for compressing a gas, wherein a gas is introduced into a compression chamber (2) to be compressed, and a liquid (100) is pumped out of an intermediate container (4) into the compression chamber (2) at least partly filled with the gas. At least one part of the liquid (100) is pumped from the compression chamber (2) to a sprinkling system (42) by means of a sprinkling circuit (24), and the liquid (100) is distributed within the compression chamber (2) by means of the sprinkling system (42). The invention additionally relates to a device (1) for carrying out the method according to the invention.

Description

description

Method and device for compressing a gas

The invention relates to a method for compressing a gas. Furthermore, the invention relates to a device for performing a method according to the present invention and / or one of its embodiments.

When a gas is compressed, the pressure and temperature of the gas increase due to the compression work. If an isentropic compression is assumed, the temperature for an ideal gas is increased accordingly

where T _{Q denotes} the temperature before compression, p ₀ the pressure before compression, T (p) the temperature after compression, p the pressure after compression and k the isentropic exponent (adiabatic exponent) of the gas. The temperature increase is therefore dependent on the temperature before compression, on the pressure ratio and on the isentropic exponent.

A compression of a gas (pressure increase) is used for example in compressed air storage power plants. Here, a gas is compressed by means of electrical energy (electrical current) and the compressed gas is stored by means of a pressure vessel or an underground pressure cavern. For a later supply of electrical energy, the compressed gas is expanded for conversion back into electricity.

Here, it is advantageous to save as high a portion of the compression work that was performed on the gas during its compression. According to the prior art, the proportion of compression work which leads to an increase in the temperature of the gas is lost in compressed air storage power plants. This is because the gas in the pressure vessels typically cools to ambient temperature. About 50 percent of the isentropic compression work goes through this lost in the form of heat. The efficiency of compressed air storage power plants is therefore limited to an efficiency below 50 percent. Typically, efficiencies above 40 percent are difficult to achieve.

Adiabatic compressed air storage power plants are also known which have a higher efficiency. However, these have not yet been used commercially. In an adiabatic compressed air storage power plant, the heat generated during the compression of the gas is transferred between individual compression stages and / or after compression of the gas from the compressed gas to a heat transfer medium. With a subsequent expansion of the gas, this heat is transferred back to the gas. This enables a significantly higher efficiency. The main challenge of this concept is its economy. This is the case because the indirect heat transfer used here requires large heat exchangers and large heat stores.

Furthermore, a liquid ring compressor can be used to compress a gas. Here, the gas to be compressed is in direct contact with a ring liquid of the liquid ring compressor, so that the heat is transferred directly from the gas to the liquid. However point

Liquid ring compressors have a low heat transfer surface. As a result, only a small part of the heat generated during the compression of the gas is actually transferred to the ring liquid (heat transfer medium).

Gases with a small isentropic exponent (K «1) could also be used. This significantly reduces the heat generated during compression. However, a large part of the known gases with small isentropic exponents is expensive, flammable and / or toxic. Their use is therefore questionable or clearly limited. The present invention is based on the object of making better use of the heat generated during the compression of a gas.

The object is achieved by a method having the features of independent claim 1 and by a device having the features of independent claim 15. Advantageous refinements and developments of the invention are specified in the dependent patent claims.

In the method according to the invention for compressing a gas, the gas is introduced into a compression space for its compression. In this case, the compression space can preferably be closed. Furthermore, a liquid is pumped from an intermediate container into the compression space, which is at least partially filled with the gas. According to the invention, at least part of the liquid is pumped from the compression chamber to a sprinkler system by means of a sprinkler circuit, with the sprinkler system distributing the liquid within the compression chamber.

If we speak of heat transfer in the following, this means an at least partial transfer of heat. In particular, a complete transfer of heat is not required.

According to the method according to the invention, the gas is compressed within the compression space by means of the liquid pumped into the compression space. This is because the volume that is available to the gas within the compression space is reduced by pumping in the liquid. In particular, a liquid is characterized in that it forms an incompressible fluid. Here, the liquid is removed from the intermediate container according to the invention. In other words, the intermediate container comprises the liquid. According to the method according to the invention, at least part of the liquid is pumped from the compression chamber to a sprinkler system by means of the sprinkler circuit and is distributed, in particular in fine particles, for example in the form of liquid drops, within the compression chamber by means of the sprinkler system. This advantageously enables the largest possible heat transfer area between the gas and the liquid within the compression space. In other words, this provides a particularly advantageous heat transfer between the gas and the liquid during its compression. Here, the liquid is provided as a displacement medium (compression of the gas) and as a heat transfer medium. In other words, the same liquid is used according to the invention as a displacement medium for compressing the gas and as a heat transfer medium for at least partially absorbing the heat generated during the compression. The particularly advantageous heat transfer is made possible by means of the sprinkler circuit and the sprinkler system.

According to the invention, the gas is thus compressed by means of the liquid due to the reduction in the volume available for the gas. This increases the pressure of the gas inside the compression chamber. The compression space is therefore closed in the sense that an increase in pressure (compression) of the gas is made possible.

Furthermore, the liquid is circulated according to the invention by means of the sprinkler circuit, that is to say from the compression chamber, in particular from a bottom of the compression chamber, to the sprinkler system and by means of the sprinkler treatment system again distributed within the compression chamber. The distributed liquid is returned to the sprinkler system by means of the sprinkler circuit. This forms a sprinkling circuit for the liquid, the heat which is generated during the compression of the gas being at least partially transferred to the liquid in direct contact with the liquid. Here is particular a fine spraying of the liquid by means of the sprinkler system is advantageous.

The method according to the invention thus advantageously proves a thermally efficient compression of the gas, in which the heat generated during the compression is at least partially transferred in direct material contact to the liquid which is simultaneously provided for the compression of the gas.

Another advantage of the present invention is that basically the amount of liquid and gas used is not restricted, so that a sufficient amount of liquid can be used for heat transfer.

The device according to the invention for carrying out a method according to the present invention and / or one of its embodiments comprises at least one compression chamber for compressing a gas, an intermediate container for receiving a liquid, a first pump for pumping the liquid from the intermediate container into the compression chamber, a loading Irrigation circuit with a sprinkler system and a second pump, wherein at least part of the liquid can be pumped from the compression chamber to the sprinkler system by means of the second pump, and wherein the liquid pumped to the sprinkler system can be distributed, in particular sprayed, particularly preferably finely sprayed by means of the sprinkler system within the compression chamber , is.

The method and / or one of its refinements have the same and equivalent advantages of the device according to the invention.

According to an advantageous embodiment of the invention, the pumping of the liquid from the intermediate container into the compression chamber takes place by means of a first pump, and the pumping of the liquid from the compression chamber to the sprinkler system by means of a second pump. The sprinkler circuit includes the second pump. Consequently, the first pump is designed as a compression pump and the second pump as a circulation pump for the liquid within the sprinkler circuit or seen before. In other words, the liquid is pumped from the intermediate container into the compression space by means of the first pump. As a result, the liquid level rises within the compression space, whereby the gas is compressed within the compression space. In other words, the first pump does at least the compression work. Here, heat is typically generated during the compression of the gas. By means of the second pump, the liquid introduced into the compression chamber, for example from the bottom of the compression chamber, is at least partially pumped to the sprinkler system by means of the irrigation circuit. By means of the sprinkler system, the liquid thus circulated is distributed, in particular sprayed, within the compression space. The second pump therefore only has to overcome the pressure drop in the sprinkler system and circulates the liquid.

In an advantageous development of the invention, the gas is discharged from the compression chamber after a threshold pressure has been reached, the stored gas being stored by means of a compressed gas store.

In other words, the compressed gas is discharged from the compression chamber upon reaching a predetermined pressure, which is characterized by the threshold pressure, from the compression chamber and stored by means of the compressed gas storage device. The heat generated during compression has been at least partially, in particular essentially completely dig, transferred to the liquid.

It is therefore advantageous to pump the liquid back into the intermediate container by means of the second pump after the gas has been discharged. In other words, after the compression and discharge of the gas, the liquid is pumped back into the intermediate container by means of the second pump. Alternatively or additionally, the liquid can be returned to the intermediate container by means of a difference in height between the compression space and the intermediate container. However, this could take too much time. It is therefore advantageous to pump the liquid back into the intermediate container by means of the second pump, which is included in the sprinkler circuit. For this purpose, a valve can be switched within the sprinkler circuit. If a gas supply with respect to the gas to the compression chamber is advantageously opened during the Auslei th liquid from the compression chamber in the intermediate container, new gas is sucked into the compression chamber by the falling liquid level of the liquid within the compression chamber. As a result, the original starting state is restored and the gas can be compressed again.

It is therefore advantageous to repeat the compression of the gas several times for a new gas quantity until a temperature of the liquid within the intermediate container is reached above a threshold value.

Here, the intermediate container is particularly advantageous, since the specific heat capacity of liquids, for example water, is typically significantly higher than that of gases, for example air. As a result, a single compression (single stroke) is typically sufficient for the compression of the gas, but the temperature of the liquid rises little. In order to store heat (compression heat) with a sufficient or advantageous temperature, several strokes are therefore typically required. A temperature of the liquid of at least 90 degrees Celsius is advantageous here. In other words, the threshold temperature is set to 90 degrees Celsius, for example. It turned out that a temperature of at least 90 degrees Celsius can be reached after about ten strokes, i.e. after ten compressions of the gas and return of the liquid to the intermediate container. For each new stroke, new gas, i.e. a new gas quantity of the gas, is introduced into the compression chamber. The number of strokes can depend on the gas used and on the liquid used, that is to say on the combination of substances.

According to an advantageous embodiment of the invention, the liquid is pumped after reaching the threshold value of its temperature from the intermediate container to a heat accumulator, and the heat accumulator is at least partially loaded by means of the heat of the liquid absorbed by the gas.

Here, it is particularly preferred to use the liquid directly as the heat storage medium of the heat store and thus to store the liquid and its heat by means of the heat store.

In an advantageous development of the invention, the liquid is pumped after the heat accumulator to a storage container by means of a third pump, with the liquid being intermediately stored by means of the storage container.

In other words, the liquid, the heat of which has been stored at least partially, in particular largely, in particular completely, by means of the heat accumulator, is advantageously pumped to the storage container and temporarily stored by means of the storage container. Here, the Vorratsbe container is provided so that the repeated compression of the gas and the pumping back of the liquid into the intermediate container are decoupled from storing the heat by means of the heat accumulator. With the repeated compression of the gas, he is called a new compression of a new amount of gas in the gas. The same amount of gas is therefore not compressed several times.

In other words, the same gas and not the same Gas compressed again. However, a repeated compression of the same gas can be provided.

According to an advantageous embodiment of the invention, at least part of the liquid is pumped inside the reservoir by means of the second pump and / or by means of the third pump from the reservoir via the sprinkler circuit to the sprinkler system.

In other words, the liquid retained in the reservoir is advantageously supplied to the sprinkler circuit. As a result, residual heat, which the liquid after the heat accumulator may have, is not lost before, but is in turn supplied to the liquid within the compression chamber via the cooling system. The heat is therefore retained in the liquid circuit. This advantageously improves the efficiency of the method in relation to the storage of the heat generated during the compression. The reservoir can be coupled to the sprinkler circuit by means of a valve, in particular a three-way valve.

In an advantageous development of the invention, the gas is fed to a first heat exchanger after it has been discharged from the compression chamber and before it is stored by means of the compressed gas store, wherein at least part of the heat of the discharged gas is transferred to the liquid within the sprinkler circuit by means of the first heat exchanger.

Advantageously, a residual heat of Ga ses, which was not transferred to the liquid during compression, after its compression and before its storage by means of the compressed gas storage, the gas is withdrawn and transferred to the liquid within the sprinkler circuit or within the compression space. So this residual heat is transferred to the liquid, which significantly improves the efficiency of the process.

According to an advantageous embodiment of the invention, the gas stored by means of the compressed gas storage is supplied to an expansion turbine for expansion of the stored gas.

In other words, the gas stored under pressure is expanded by means of the expansion turbine, as a result of which electricity is generated or made available, for example, by means of a generator coupled to the expansion turbine. Due to the compressed gas storage, the electrical current can be independent of the compression of the gas and the supply of the electrical current to the first

and / or second pump can be provided.

In an advantageous development of the invention, the gas cooled by means of the expansion is fed to a second heat exchanger of a refrigeration cycle for cooling a refrigerant.

The gas expanded by means of the expansion turbine typically has a low temperature, in particular a temperature below 0 degrees Celsius. This can be provided before geous cold, which can be transferred to a refrigerant, which circulates within a refrigeration cycle, by means of the second heat exchanger.

It is particularly preferred to load a cold store of the refrigeration cycle by means of the cold of the refrigerant.

The cold transferred to the refrigerant is advantageously stored by means of the cold store. In other words, in addition to the heat that can be provided by means of the heat store, cold is also advantageously provided or can be provided. This can coldly be provided for a later time, and in particular be decoupled in time from the compression of the gas.

According to an advantageous embodiment of the invention, the first and second pumps for storing electrical energy in the form of the compressed gas are used, furthermore the stored electrical energy is at least partially provided again by means of a generator coupled to the expansion turbine.

In other words, the method of storing electric power is used. Here, the first and second pumps are supplied with electrical energy, the gas is compressed, the heat is stored and the compressed gas is stored by means of the compressed gas storage. If electrical current is required at a later point in time, the gas stored by means of the compressed gas storage is supplied to the expansion turbine and electrical current is generated by means of the generator coupled to the expansion turbine. It is particularly advantageous here that the expanded gas cools down and can in turn be used to load a cold store. The heat generated during compression is also stored by means of the heat store, so that the electrical energy supplied to the pumps is stored or made available in the form of heat, cold and / or electrical energy. In other words, the compression of the gas according to the invention and / or one of its embodiments provides an advantageous method for storing electrical energy and an advantageous method for providing heat and / or cold.

The device operated by means of the method according to the invention and / or one of its configurations can thus be used as a power store, heat store and / or cold store or is designed as a power store, heat store and / or cold store. Further advantages, features and details of the invention he play from the Ausführungsbei described below and play with reference to the drawings. Schematically show:

Figure 1 shows a first embodiment of the present invention

dung; and

Figure 2 is a flowchart of the inventive method.

Identical, equivalent or equivalent elements can be provided with the same reference numerals in one of the figures or in the figures.

FIG. 1 shows a schematic representation of a device 1 according to an embodiment of the present invention, which is suitable, provided or designed for carrying out a method according to the present invention and / or one of its embodiments.

The device 1 comprises a compression chamber 2, which is designed as a closed pressure vessel in example. Furthermore, the device 1 comprises an intermediate container 4 (first container) which is designed to receive a liquid 100 or comprises it. Furthermore, the device 1 comprises a sprinkler circuit 24, a sprinkler system 42, a first pump 31 and a second pump 32, an intermediate container 10 (second container) and a compressed gas reservoir 6.

First, a gas is introduced into the compression chamber 2 by means of a gas supply 101. This can be done and controlled by means of a valve 71. The liquid 100 is introduced or pumped from the intermediate container 4 into the compression chamber 2 by means of the first pump 31. By pumping the liquid 100 from the intermediate container 4 into the compression chamber 2 by means of the first pump 31 the volume available to the introduced gas is reduced. In this sense, the introduced liquid 100 is a displacement medium with respect to the one guided gas. In other words, the introduced gas is compressed by the pumping of the liquid 100 into the compression space 2, and thus the pressure of the gas is increased.

Typically, when the gas is compressed, its temperature increases. In other words, the compression work performed by means of the first pump 31 is converted into heat and into the compression, that is to say into the pressure increase in the gas. So that the heat generated during the compression of the gas is not completely lost, the loading circuit 24 and the sprinkler system 42 are provided according to the invention. The sprinkling, that is to say the distribution, in particular of fine spraying of the liquid 100 within the compression space 2 by means of the sprinkling system 42, provides an increased heat transfer area between the gas and the liquid 100 within the compression space 2. The increased heat transfer area significantly improves the heat transfer from the gas to the liquid 100.

By means of the second pump 32, the liquid 100 is circulated within half of the compression space 2 and again distributed, in particular finely sprayed, by means of the sprinkler system 42 within the compression space 2. The sprinkler circuit 24 takes the liquid 100 from a bottom of the compression chamber 2 and pumps it by means of the second pump 32 to the sprinkler system 42, which is arranged in the vicinity of a ceiling of the compression chamber 2. From there, the liquid 100 is divided ver within the compression chamber 2, in particular sprayed finely. The liquid drops produced in this way have an increased heat transfer area to the gas, so that the heat transfer from the gas to the liquid 100 is improved. The introduction of the liquid 100 to the sprinkler system 42 can be controlled by means of a fourth valve 74. Here, the trickle circuit 24, the fourth valve 74. Furthermore, the sprinkler circuit 24 has a third valve 73, which has the position or position AA during the compression (compression process) of the gas.

If a defined threshold pressure of the gas within the compression chamber 2 has been reached, the gas is discharged from the compression chamber 2 by means of a fifth valve 75 and led to the compressed gas store 6. By means of the compressed gas store 6, the compressed gas can be stored or temporarily stored for later use.

To repeat the compression for a new amount of gas in the gas, it is advisable to discharge the liquid 100 from the compression chamber 2 again. For this purpose, the third valve 73 is switched to position A-B. This makes it possible by means of the second pump 32 to pump the liquid 100 from the compression chamber 2, in particular from the bottom of the compression chamber 2, back to the intermediate container 4. Alternatively or additionally, the liquid 100 could flow back to the intermediate container 4 gravitationally within the sealing chamber 2, for example due to a difference in height.

However, this is typically too slow, so that pumping the liquid 100 back to the intermediate container 4 by means of the pump 32 is preferred.

If during the pumping out of the liquid 100 back to the intermediate container 4, the first valve 71 of the gas supply 101 opens, a new gas quantity of the gas is sucked into the compression chamber 2 again by the falling liquid level within the compression chamber 2. In other words, the initial state - gas within the compression chamber 2 and liquid 100 in the intermediate container 4, liquid 100 not in the compression chamber 2 - can be restored. Now the new amount of gas can be re-sealed by pumping the liquid 100 from the intermediate container 4 into the compression chamber 2 by means of the first pump 31. Typically, several densifications or several repetitions or strokes are required for an advantageously high temperature of the liquid 100. This is because the specific heat capacity of liquids, such as water, is significantly higher than that of gases, such as air. This means that the heat is largely removed from the gas by a one-time compression (one-off stroke), but the temperature of the liquid 100 rises only slightly in the process. In order to reach a sufficiently high temperature, for example above 90 degrees Celsius, typically about ten strokes or compressions are required, possibly depending on the material combination.

If a predetermined advantageously high temperature of the liquid speed 100 is reached, for example above 90 degrees Cel sius, the liquid 100 is passed from the intermediate container 4 by means of an opening of a sixth valve 76 to a heat store 8. The heat of the liquid 100, which it has absorbed through the compression of the gas 2, is at least partially stored or at least partially buffered by means of the heat store 8. Here, the liquid 100 can be used directly as a storage medium for the heat store 8. Alternatively or in addition, the heat of the liquid 100 can be at least partially transferred to a heat storage medium of the heat storage 8. If the liquid 100 is used directly as a heat storage medium in the heat store 8, it can be supplied, for example by means of a seventh valve 77 and by means of a third pump 33, to a third heat exchanger 53, the heat, by means of the third heat exchanger 53, which was generated during the compression and was stored by means of the liquid 100, is at least partially provided for a heat consumer.

After the third heat exchanger 53, the liquid 100 is fed to a storage container 10 by means of the third pump 33 inflated. By means of the reservoir 10, the liquid 100 is retained for reuse within the sprinkler circuit 24. For example, this is supplied to the sprinkling circuit 24 again by means of a second valve 72. As a result, residual heat of the liquid 100, which it still has after the heat store 8 or after the third heat exchanger 53, is advantageously at least partially used again within the sprinkling circuit 24 and is at least partially fed back to the latter.

The compressed gas is discharged from the compression chamber 2 by means of a fifth valve 75 and led to the compressed gas store 6. Between the compression chamber 2 and the compressed gas reservoir 6, a first heat exchanger 51 is provided. By means of the first heat exchanger 51, residual heat of the discharged gas can be conducted back to the sprinkling circuit 24. The feedback can be controlled by means of a ninth valve 79. In other words, residual heat of the gas is retransmitted by means of the first heat exchanger 51 to the liquid 100 within the sprinkler circuit 24. For this purpose, the liquid 100 can be fed to the first heat exchanger 51 within the sprinkling circuit 24 via a ninth valve 79. Since an at least partial return of residual heat of the compressed gas advantageously takes place.

The compressed gas stored by means of the compressed gas store 6 can be fed to an expansion turbine 12, in particular a compressed air turbine, for example with a connected generator, by means of an eighth valve 78. With means of the expansion turbine 12, the compressed gas is expanded from the compressed gas storage 6. By means of the expansion door 12 and the generator, electrical energy, that is to say electrical current, can thus be generated and provided by the expansion work of the gas. After the gas has expanded, it typically has a low temperature, for example below 0 degrees Celsius. This low temperature of the gas can be used to To provide cold. Accordingly, in the illustrated embodiment of the present invention, a second heat exchanger 52 is provided, which is thermally coupled to a refrigeration circuit 14 ther. The refrigeration cycle 14 has a cold storage 16 and a fourth pump 34, the fourth pump 34 being provided for circulating a refrigerant within the refrigeration cycle 14. The expanded gas is fed to the second heat exchanger 52, the cold of the expanded gas being transferred to the refrigerant circulating within the refrigeration circuit 14 by means of the second heat exchanger 52. The transmitted cold is stored by means of the cold store 16.

In other words, electrical power, heat and / or cold can be stored and / or provided by means of the illustrated embodiment of the invention. Here, the device 1 has a high efficiency, in particular above 50 percent, in relation to the pumps 31,

32 initially supplied electrical energy. The electrical cal energy is mostly referred to by the first pump 31, which performs the compression work on the gas within the compression chamber 2. Electrical energy is also provided for the operation of the second pump 32, the second pump 32 only having to compensate for the pressure loss with respect to the sprinkler system 42. In other words, the second pump 32 only has to do circulation work for the liquid 100.

A major advantage of the present invention is that the sprinkler system 42 and the distribution, in particular by a fine spraying of the liquid 100, enable a particularly effective heat transfer from the gas to be compressed to the liquid 100. According to the invention, the liquid 100 fulfills at least two technical functions. On the one hand this is used for the compression of the gas within the compression space 2 and on the other hand for receiving and possibly storing the heat generated during the compression process. According to the invention, at least these two technical functions combined synergistically, so that a compression of the gas with the most effective possible heat transfer between the gas and the liquid 100 is made possible.

The liquid 100 is preferably water, wherein the water can comprise further constituents and / or impurities. The gas is preferably air.

FIG. 2 shows a schematic flow diagram of the method according to the invention. Reference is made here to the elements shown in FIG. 1.

In a first step S1 of the method according to the invention for compressing a gas, the gas is introduced into the compression chamber 2 for its compression.

This can take place via the first valve 71 of the gas supply 101.

In a second step S2 of the method according to the invention, the liquid 100 is pumped from an intermediate container 4 into the compression space 2, which is at least partially filled with the gas.

The liquid 100 is preferably pumped in by means of the first pump 31.

In a third step S3 of the method according to the invention, at least part of the liquid 100 is pumped from the compression chamber 2 to a loading system 42 by means of the loading circuit 24.

This can be done particularly preferably by means of the second pump 32.

In a fourth step S4 of the method according to the invention, the liquid 100 is sprayed by means of the sprinkler system 42 distributed within the compression chamber 2, in particular sprayed finely.

According to one embodiment of the invention, in a fifth step S5 (not shown), the gas can be discharged from the compression chamber 2 after reaching a threshold pressure and can be stored by means of the compressed gas store 6.

The gas can be discharged by means of the fifth valve 75.

In a development of the invention, in a sixth step S6 (not shown), after the gas has been discharged, the liquid 100 is pumped back into the intermediate container 4 by means of the second pump 32.

Here, the third valve 73 is switched from its original position A-A to the position A-B. As a result, the liquid 100 is pumped from the compression chamber 2 back to the intermediate container 4 by means of the second pump 32.

According to a further embodiment of the invention, in a seventh step S7, during the pumping back of the liquid 100 into the intermediate container 4, a new gas quantity of the gas is sucked or introduced into the compression space 2 by means of the gas supply 101.

As a result, the initial state is restored in accordance with the first step S1. In other words, steps S1 to S6 can be repeated. This causes the new gas to compress (further stroke). Steps S1 to S6 can thus be repeated one or more times until a temperature of the liquid 100 within the intermediate container 4 above a threshold value is reached. The threshold value is preferably above 90 degrees Celsius.

Although the invention has been illustrated and described in detail by the preferred exemplary embodiments, so the invention is not restricted by the examples disclosed or other variations can be derived therefrom by a person skilled in the art without departing from the scope of protection of the invention.

Reference character list

1 device

2 compression room

4 intermediate containers

6 compressed gas storage

8 heat accumulators

10 storage containers

12 expansion turbine

14 refrigeration cycle

16 cold accumulators

24 sprinkling circuit

31 first pump

32 second pump

33 third pump

34 fourth pump

42 sprinkler system

51 first heat exchanger

52 second heat exchanger

53 third heat exchanger

71 first valve

72 second valve

73 third valve

74 fourth valve

75 fifth valve

76 sixth valve

77 seventh valve

78 eighth valve

79 ninth valve

100 liquid

101 gas supply

51 first step

52 second step

53 third step fourth step fifth step sixth step seventh step

Claims

claims

1. A method for compressing a gas, in which the gas is introduced into a compression chamber (2) for its compression, in which a liquid (100) from an intermediate container (4) in the at least partially filled with the gas compression chamber (2) is pumped, in which at least part of the liquid (100) is pumped by means of a sprinkler circuit (24) from the compression chamber (2) to a sprinkler system (42), and in which by means of the sprinkler system (42) a distribution of the liquid (42) 100) takes place within the compression space (2).

2. The method according to claim 1, wherein the pumping of the liquid (100) from the intermediate container (4) into the compression chamber (2) by means of a first pump (31), and in which the pumping of the liquid (100) from the compression chamber (2) to the sprinkler system (42) by means of a second pump (32) of the sprinkler circuit (24).

3. The method according to claim 2, in which the gas is reached after reaching a threshold pressure from the compression chamber (2), and in which the discharged gas is stored by means of a compressed gas store (6).

4. The method according to claim 3, wherein the liquid (100) is pumped back into the intermediate container (4) by means of the second pump (32) after the gas has been discharged.

5. The method according to claim 4, wherein the steps according to the preceding claims are repeated one or more times until the temperature of the liquid (100) within the intermediate container (4) is reached above a threshold value.

6. The method of claim 5, wherein the threshold is set above 90 degrees Celsius.

7. The method according to claim 5 or 6, in which the liquid (100) after reaching the threshold value of its temperature is pumped from the intermediate container (4) to a heat accumulator (8), and in which the heat accumulator (8) by means of the compression heat of the liquid absorbed by the gas is at least partially loaded.

8. The method according to claim 7, wherein the liquid (100) after the heat storage (8) to a reservoir (10) by means of a third pump (33) is pumped, and in which the liquid (100) is temporarily stored by means of the pre advice container (10).

9. The method according to claim 8, wherein at least part of the liquid (100) within the storage container (10) by means of the second pump (32) and / or the third pump (33) from the storage container (10) via the sprinkler circuit (24) is pumped to the sprinkler system (42).

10. The method according to any one of claims 3 to 9, wherein the gas after it has been discharged from the compression chamber (2) and before being stored by means of the compressed gas storage (6) is supplied to a first heat exchanger (51), with the first heat exchanger ( 51) at least part of the heat of the discharged gas is transferred to the liquid (100) within the sprinkler circuit (24).

11. The method according to any one of claims 3 to 10, wherein the gas stored by means of the compressed gas storage (6) is fed to an expansion turbine (12) for expanding the stored gas.

12. The method according to claim 11, in which the gas cooled by the expansion leads to a second heat exchanger (52) of a refrigeration cycle (14) for cooling a refrigerant.

13. The method according to any one of the preceding claims, in which a cold accumulator (16) of the cooling circuit (14) is loaded by means of the cold of the refrigerant.

14. The method according to any one of claims 11 to 13, wherein the first and second pumps (31, 32) are used for storing electrical energy in the form of the compressed gas, and in which the stored electrical energy is at least partially by means of one with the expansion turbine (6) coupled generator is provided again.

15. The device (1) for performing a method according to any one of the preceding claims, comprising a compression chamber (2) for compressing a gas, an intermediate container (4) for receiving a liquid (100), a first pump (31) for pumping of the liquid from the intermediate container (4) into the compression chamber (2), a sprinkler circuit (24) with a sprinkler system (42) and a second pump (32), at least part of the liquid (100) using the second pump (32) from the compression chamber (2) to the irrigation system (42) can be pumped, the liquid (100) pumped to the irrigation system (42) by means of the irrigation system (42) being distributable within the compression chamber (2).