Why does flat plate collector perceived to have higher efficiency than evacuated tube solar collector in terms of area?
A. Because flat plate collector has a large installation area
B. Because evacuated tube collector is compact
C. Because of the vacuum gap in evacuated tube collectors
D. Because of the vacuum gap in flat plate collectors
Answer:C
Why does flat plate collector perceived to have higher efficiency than evacuated tube solar collector in terms of area?
A. Because flat plate collector has a large installation area B. Because evacuated tube collector is compact C. Because of the vacuum gap in evacuated tube collectors D. Because of the vacuum gap in flat plate collectors
Explanation: In terms of area, flat plate solar collectors are generally perceived to have a higher efficiency than evacuated-tube solar collectors. This is because of the vacuum gap in evacuated tube collectors which increases their net occupied area.