4[1]He Zinian, Ge Hongchuan, Jiang Fulin, Li Wei. A comparison of optical performance between evacuated collector tubes with flat end semicylindric absorbers. Solar Energy, 1997,60 (2): 109 ~ 117
5[2]Duffue J A, Beckman W A. Solar engineering of thermal processes. New York:Wiley, 1980
6[3]ASHRAE. ASHRAE Handbook and Product Directory. Fundamentals Volume. New York:1977