Method and device for condensing CO2

Abstract

The invention relates to a method and to a device for condensing CO2 or CO2 separation. According to the invention the thermoacoustic effect is used, with the aid of waste heat from a power station, to produce power for a compressor for compressing a working medium, in particular for compressing a CO2-containing flue gas, and/or for cooling the working medium.

1 - 18 . (canceled) 
   
   
       19 . A method for condensing a working medium of a power station, comprising:
 producing a power to a compressor by a first thermoacoustic machine;   compressing the working medium by the compressor;   generating a cold to a cooling device by a second thermoacoustic machine; and   cooling the compressed working medium in the cooling device.   
   
   
       20 . The method as claimed in  claim 19 , wherein a waste heat of the power station is supplied to the first thermoacoustic machine or the second thermoacoustic machine. 
   
   
       21 . The method as claimed in  claim 20 ,
 wherein the first thermoacoustic machine comprises a first heat exchanger and a second heat exchanger,   wherein the first heat exchanger is thermally contacted with the second heat exchanger via a first heat transfer medium, and   wherein a power generation device converts a pressure variation produced in the first heat transfer medium by a thermoacoustic effect into the power to the compressor.   
   
   
       22 . The method as claimed in  claim 21 , wherein the waste heat is supplied to the first heat exchanger and a coolant is supplied to the second heat exchanger. 
   
   
       23 . The method as claimed in  claim 21 , wherein the power is transmitted to the compressor via a pipe. 
   
   
       24 . The method as claimed in  claim 19 ,
 wherein the second thermoacoustic machine comprises a third heat exchanger and a fourth heat exchanger,   wherein the third heat exchanger is thermally contacted with the forth heat exchanger via a second heat transfer medium, and   wherein the working medium passes through the fourth heat exchanger and is cooled by a thermoacoustic effect.   
   
   
       25 . The method as claimed in  claim 24 , wherein the waste heat is supplied to the third heat exchanger and a power supply device produces a pressure variation in the second heat transfer medium or intensifies an existing pressure variation. 
   
   
       26 . The method as claimed in  claim 19 ,
 wherein the working medium comprises CO2 and is liquefied by the condensing, and   wherein a separator separates the liquefied working medium into liquid CO2 and a residual medium that is low in CO2.   
   
   
       27 . A device for condensing a working medium of a power station, comprising:
 a compressor that compresses the working medium;   a cooling device that cools the compressed working medium;   a first thermoacoustic machine that produces a power to the compressor for compressing the working medium; and   a second thermoacoustic machine that produces a cold to the cooling device for cooling the compressed working medium.   
   
   
       28 . The device as claimed in  claim 27 , wherein a waste heat pipe of the power station is connected to the first thermoacoustic machine or the second thermoacoustic machine. 
   
   
       29 . The device as claimed in  claim 28 ,
 wherein the first thermoacoustic machine comprises a first heat exchanger and a second heat exchanger,   wherein the first heat exchanger is thermally contacted with the second heat exchanger via a first heat transfer medium, and   wherein a power generation device is coupled to the first thermoacoustic machine and converts a pressure variation produced in the first heat transfer medium by a thermoacoustic effect into the power to the compressor.   
   
   
       30 . The device as claimed in  claim 29 , wherein the waste heat is supplied to the first heat exchanger via a first feeding pipe connected to the waste heat pipe and a coolant is supplied to the second heat exchanger via a second feeding pipe. 
   
   
       31 . The device as claimed in  claim 29 , wherein the power generation device is jointly constructed with the compressor as a linear compressor and comprises components to produce the power to the compressor via the pressure variation. 
   
   
       32 . The device as claimed in  claim 29 , wherein the power generation device is connected to the compressor via a pipe to transmit the power. 
   
   
       33 . The device as claimed in  claim 27 ,
 wherein the second thermoacoustic machine comprises a third heat exchanger and a fourth heat exchanger,   wherein the third heat exchanger is thermally contacted with the forth heat exchanger via a second heat transfer medium, and   wherein the working medium passes through the fourth heat exchanger and is cooled by a thermoacoustic effect.   
   
   
       34 . The device as claimed in  claim 33 ,
 wherein the waste heat is supplied to the third heat exchanger via a third feeding pipe connected to the waste heat pipe, and   wherein a power supplying device is coupled to the second thermoacoustic machine and produces a pressure variation in the second heat transfer medium or intensifies an existing pressure variation.   
   
   
       35 . The device as claimed in  claim 33 , wherein an input of the fourth heat exchanger is connected to an output of the compressor. 
   
   
       36 . A device for CO2 separation of a working medium of a power station, comprising:
 a compressor that compresses the working medium;   a cooling device that cools the compressed working medium;   a first thermoacoustic machine that produces a power to the compressor for compressing the working medium;   a second thermoacoustic machine that produces a cold to the cooling device for cooling the compressed working medium to a liquefied working medium; and   a separator that separates the liquefied working medium into liquid CO2 and a residual medium low in CO2.