| 摘要 |
There is provided a solar collector comprising an absorber, a getter, and a heating element arranged within an evacuated transparent envelope, the heating element being positioned separate and apart from the getter. Associated with the envelope is means to heat the heating element to a temperature of 500 DEG to 2000 DEG C. in order to crack any hydrocarbons formed from gaseous contaminants released by the envelope and the absorber during operation. |
