Evacuated flat-plate solar collectors use _ pumps.
A. Heat pump
B. Flash getter pump
C. Non-evaporable getter
D. Internal combustion
Answer:C
Evacuated flat-plate solar collectors use _ pumps.
A. Heat pump B. Flash getter pump C. Non-evaporable getter D. Internal combustion
Explanation: Evacuated flat-plate solar collectors use non-evaporable getter (NEG) pumps to keep the internal pressure stable throughout the operation. This pump enables some regeneration in-situ by exposure to sunlight.