Method for performing an exhaust cycle of a vacuum solar thermal panel

Abstract

The present application relates to a method for performing an exhaust cycle of a vacuum solar thermal panel comprising a heating phase of the overall panel up to a maximum temperature (Tm), being the temperature sustainable by at least a panel component. According to the invention it is foreseen a further heating phase being a selective heating phase of some selected panel components, this further heating phase being performed at a second temperature (Th) which is greater than the maximum temperature (Tm).

1 . A method for performing an exhaust cycle of a vacuum solar thermal panel while having the panel connected to a vacuum pump to exhaust desorpted gases, said method comprising:
 a heating phase of the overall panel up to a maximum temperature (Tm), being the maximum temperature sustainable by at least a panel component;   a further heating phase being a selective heating phase of some selected panel components, this further heating phase being performed at a second temperature (Th) which is greater than said maximum temperature (Tm).   
     
     
         2 . The method according to  claim 1 , wherein said second temperature (Th) is sustainable by said selected components. 
     
     
         3 . The method according to  claim 1 , wherein said second temperature (Th) is between 250 and 550° C. 
     
     
         4 . The method according to  claim 1 , wherein said selective heating phase is performed concurrently with said first heating phase. 
     
     
         5 . The method according to  claim 1 , wherein said selective heating phase involves a solar absorber comprised into said panel. 
     
     
         6 . The method according to  claim 1 , wherein said selective heating phase comprises an irradiation of said panel. 
     
     
         7 . The method according to  claim 6 , wherein said irradiation of said panel is performed with electromagnetic radiation in the visible range. 
     
     
         8 . The method according to  claim 7 , wherein said irradiation of said panel is performed with Radio Frequency electromagnetic radiation. 
     
     
         9 . The method according to  claim 1 , wherein said first heating phase of the overall panel is performed in an oven up to said maximum temperature (Tm).