What is the metal sheet absorber surrounded with in an evacuated flat plate collector?
A. Low volume inside flat envelope
B. Low vacuum inside curved envelope
C. High vacuum inside flat envelope
D. Low vacuum inside thick curved envelope
Answer:C
What is the metal sheet absorber surrounded with in an evacuated flat plate collector?
A. Low volume inside flat envelope B. Low vacuum inside curved envelope C. High vacuum inside flat envelope D. Low vacuum inside thick curved envelope