Air dryer in a wind power station

Abstract

The invention relates to an air dryer in a wind power station comprising a frequency converter with liquid cooling, the air dryer comprising a Peltier element ( 3 ), the first side of which is connected to an element to be cooled ( 1 ) and the second side to a heat-receiving element ( 2 ), and while the element to be cooled ( 1 ) is cooled, humidity condenses on the surface of this element. The air dryer is located inside a frequency converter cabinet and the heat-receiving element ( 2 ) of the air dryer is connected to contact piping ( 4 ) for liquid cooling or formed as a part of the piping. The invention also relates to a method for using such an air dryer.

1 . An air dryer in a wind power station comprising a frequency converter with liquid cooling, the air dryer comprising a Peltier element, the first side of which is connected to an element to be cooled and the second side to a heat-receiving element, and while the element to be cooled is cooled, humidity condenses on the surface of this element, wherein the air dryer is located inside a frequency converter cabinet and that the heat-receiving element of the air dryer is connected to contact piping for liquid cooling or formed as a part of the piping.  
     
     
         2 . An air dryer as claimed in  claim 1 , wherein the heat-receiving element of the air dryer is connected to a surface of a main water pipe.  
     
     
         3 . An air dryer as claimed in  claim 1 , wherein the heat-receiving element of the air dryer is arranged in connection with the piping branched off the main water pipe.  
     
     
         4 . An air dryer as claimed in  claim 1 , wherein the operating energy of the air dryer is direct current.  
     
     
         5 . An air dryer as claimed in  claim 1 , wherein the operation control of the air dryer is implemented by means of a condensate water sensor.  
     
     
         6 . A method for drying air in a wind power station comprising a frequency converter with liquid cooling, wherein the drying is carried out by an air dryer comprising a Peltier element, the first side of which is connected to an element to be cooled and the second side to a heat-receiving element, and while the element to be cooled is cooled, humidity condenses on the surface of this element, by locating the air dryer inside a frequency converter cabinet, connecting the heat-receiving element of the air dryer to contact piping for liquid cooling or forming it as a part of the piping, and carrying out the drying only if necessary, without pre-drying.  
     
     
         7 . A method as claimed in  claim 6 , by controlling the drying by means of a condensate water sensor.