Performance of U-tube Solar Water Heaters Facing Different Directions  

作　　者：Ong Kok-Seng Tong Wei-Li David Cheong 

机构地区：[1]Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, Kampar 31900, Perak, Malaysia [2]Monash University Sunway Campus, Jalan Lagoon Selatan, Bandar Sunway 46150, Selangor, Malaysia

出　　处：《Journal of Energy and Power Engineering》2013年第9期1729-1734,共6页能源与动力工程（美国大卫英文）

摘　　要：System performance of solar water heaters depends upon collector and storage tank designs, solar radiation intensity and ambient temperature, amongst others. Evacuated glass tube collectors with U-tubes inside are less prone to leakages than the all-glass or the heat pipe types. U-tube solar water heaters suspended on walls and balconies could help overcome present day roof space restriction and increasing apartment-style housing. As such, their performance would depend upon its orientation when mounted in a vertical position. This paper reports the results of outdoor tests conducted on natural convection U-tube solar water heaters oriented towards different directions. Long and short term test procedures were employed to allow us to compare their performances as if they were tested simultaneously side-by-side.

关 键 词：Solar water heater evacuated glass tube U-tube collector natural convection long and short term tests directional effects. 

分 类 号：TK515[动力工程及工程热物理—热能工程] TL353.13[核科学技术—核技术及应用]