Why does an evacuated flat plate collector require a glass-metal seal?
A. To join the glass plate to the rest of metal envelope
B. To join the glass plate to a part of metal envelope
C. To disconnect the glass plate to the rest of plastic envelope
D. To disconnect the glass plate to the rest of metal envelope
Answer:A
Why does an evacuated flat plate collector require a glass-metal seal?
A. To join the glass plate to the rest of metal envelope B. To join the glass plate to a part of metal envelope C. To disconnect the glass plate to the rest of plastic envelope D. To disconnect the glass plate to the rest of metal envelope
Explanation: An evacuated flat plate collector requires a glass-metal seal. This is to join the glass plate to the rest of metal envelope. It also requires an internal structure to support such a plate against atmospheric pressure.