Collector Efficiency by Single Pass of Solar Air Heaters with and without Using Fins

Abstract

Abstract. This paper presents the study of heat transfer in a solar air heater by using new design of solar collector. The collector efficiency in a single pass of solar air heater without, and with using fins attached under the absorbing plate has been investigated experimentally. Due to adding the fins to the interior of an absorber plate, the desirable effect of increasing the heat transfer coefficient compensates for the undesirable effect of decreasing the driving force (temperature difference) of heat transfer, while the attached fins provide an enlarged heat transfer area. In this study, the absorbing plate of solar collector is attached with fins for further improved performance. The improvements of collector efficiencies in the single pass solar air heaters with, and without fins attached; increase with increasing the mass flow rate, especially for operating at lower air flow rate. Experiments were performed for two air mass flow rates of 0.012 and 0.016 kg/s. Moreover, the maximum efficiency obtained for the 0.012 and 0.016 kg/s with, and without fins were 40.02, 51.50% and 34.92, 43.94% respectively. A comparison of the results of the mass flow rates by solar collector with, and without fins shows a substantial enhancement in the thermal efficiency.

Mathematical Modeling of Drying of Mint in a Forced Convective Dryer Based on Important Parameters

“…There is a great diversity of designs and modes of operation: forced convection, Ahmad et al, [4], Indirect forced convection, Bahlou et al, [5], Direct cabinet and indirect cabinet solar dryers, Banoult et al, [6], Solarbiomass hybrid dryer enhanced by the Co-Gen technique, Tadahmun and Hussai, [7]; Leon and Kumar, [8], Greenhouse solar dryers, Abdullah, [9]; Bechoff et al, [10], Direct solar dryer, Hii et al, [11], Heat pumps, Fadhel et al, [12]; Li et al, [13], Indirect natural convection solar dryer with chimney, solar dryer with greenhouse as collector, solar tunnel dryer (air collector), hybrid solar dryer assisted by evacuated tube collectors, Jairaj et al, [14]. F. Chabane et al [15][16][17][18][19][20][21][22][23][24][25][26], Presents a study of heat transfer in a solar air heater by using new design of solar collector. The collector efficiency in a single pass of solar air heater without, and with using fins attached under the absorbing plate has been investigated experimentally the maximum efficiency obtained for the 0.012 and 0.016 kg/s with, and without fins were 40.02, 51.50 % and 34.92, 43.94 %.…”

Experimental study of thermal efficiency of a solar air heater with an irregularity element on absorber plate

“…Some literatures have used the thermal performance of a solar air heater with roughness elements on absorber plate and without fins for see the optimal point, and no forget the effect climate onto the collector, especially the ambient temperature, so we can be seen that ambient temperature is effect onto the thermal efficiency of solar collector [10][11][12][13][14][15][16][17][18][19]. F. Chabane & al [20][21][22][23][24][25][26][27][28][29][30][31], Presents a study of heat transfer in a solar air heater by using new design of solar collector. The collector efficiency in a single pass of solar air heater without, and with using fins attached under the absorbing plate has been investigated experimentally the maximum efficiency obtained for the 0.012 and 0.016 kg/s with, and without fins were 40.02, 51.50% and 34.92, 43.94%.…”

Thermal Analysis of a Pentagonal Solar Air Collector

“…An experimental comparison study is carried out by F. Chabane, et al (Chabane, Moummi, Benramache, Bensahal, & Belahssen, 2013) to assess the efficiency of a solar air collector without and with using fins attached at the back of the absorber plate. The collector is tested in Biskra city of Algeria.…”