Method for gaining heat energy from a solar collector and heat energy absorbent substances usable in this method

Abstract

The invention relates to a method for gaining heat energy from a solar collector, wherein energy is produced through a heat exchanger upon circulating a heat energy absorbent substance in a closed system of the solar collector. According to the invention fluid sulphur is used as heat energy absorbent substance in admixture with 0.5-15% by weight of selenium and/or tellurium, based on the total weight of the heat energy absorbent substance. The invention also relates to heat energy absorbent substances usage in the above method.

1 . A method for gaining heat energy from a solar collector, wherein energy is produced through a heat exchanger upon circulating a heat energy absorbent substance in a closed system of the solar collector, in which fluid sulphur is used as heat energy absorbent substance in admixture with 0.5-15% by weight of selenium and/or tellurium, based on the total weight of the heat energy absorbent substance.  
   
   
       2 . A method as claimed in  claim 1 , in which the heat energy absorbent substance is exposed to solar radiation in a receiver made of a material which is transmittant within the 280-4000 nm wavelength range of solar radiation over a range exceeding the infrared one.  
   
   
       3 . A method as claimed in  claim 2 , in which quarz glass is used as a material which is transmittant within the 280-4000 nm wavelength range of solar radiation over a range exceeding the infrared one.  
   
   
       5 . Use of a material which is transmittant within the 280-4000 nm wavelength range of solar radiation over a range exceeding the infrared one as structural material for an energy receiver of a solar collector.  
   
   
       6 . Use of quarz glass as structural material for an energy receiver of a solar collector.