TY  - JOUR
AU  - Fudholi, Ahmad 
AU  - Sopian, Kamaruzzaman 
AU  - Ruslan, Mohd Hafidz 
AU  - Othman, Mohd. Yusof 
AU  - Yahya, Muhammad 
PY  - 2011
TI  - Thermal Efficiency of Double Pass Solar Collector with Longitudinal Fins Absorbers
JF  - American Journal of Applied Sciences
VL  - 8
IS  - 3
DO  - 10.3844/ajassp.2011.254.260
UR  - https://thescipub.com/abstract/ajassp.2011.254.260
AB  - Problem statement: One of the most important components of a solar energy system is the
solar collector. The performances of double-pass solar collector with longitudinal fins absorbers are
analyzed. Approach: The study involves a theoretical study to investigate the effect of mass flow rate,
number and height of fins on efficiency, which involves steady-state energy balance equations on the
longitudinal fins absorber of solar collectors. The theoretical solution procedure of the energy
equations uses a matrix inversion method and making some algebraic rearrangements. Results: The
collector efficiency increases as the number and height of fins increases. For a mass flow rate 0.02-
0.1kg/s, the double-pass solar collectors are efficiency about 36-73% in upper fins (type I), 37-75% in
lower fins (type II) and 46-74% in upper and lower fins (type III). Conclusion: The efficiency of the
collector is strongly dependent on the flow rate, efficiency increase is about 35%.