Experimental Study on Thermal Performance of a Novel Solar Air Collector Having Conical Springs on Absorber Plate

2016 ◽  
Vol 41 (11) ◽  
pp. 4509-4516 ◽  
Author(s):  
Mesut Abuşka ◽  
Mehmet Bahattin Akgül
Keyword(s):  
Experimental Study ◽  
Thermal Performance ◽  
Absorber Plate ◽  
Solar Air Collector

Performance and Economic Analysis of Double Pass Solar Air Collector

2011 ◽  
Author(s):  
Akhilesh Gupta ◽  
Ravi Kumar ◽  
Bharat Ramani
Keyword(s):  
Porous Material ◽  
Economic Analysis ◽  
Thermal Performance ◽  
Convective Heat Transfer Coefficient ◽  
Radiation Energy ◽  
High Heat ◽  
Absorber Plate ◽  
Double Pass ◽  
Plate Temperature ◽  
Solar Air Collector

Solar collector is a type of heat exchanger which transfers solar radiation energy into the heat energy. Conventional solar air collectors have poor thermal efficiency primarily due to high heat losses and low convective heat transfer coefficient between the absorber plate and flowing air stream, leading to higher absorber plate temperature and greater thermal losses. Attempts have been made to improve the thermal performance of conventional solar air collectors by employing various design and flow arrangements. Double pass counter flow solar air collector with porous material in the second air passage is one of the important and effective design improvement that has been proposed to improve the thermal performance. This paper presents the performance and economic analysis of double pass solar air collector with and without porous material. Effects of various parameters on the thermal performance and pressure drop characteristics have been studied experimentally. The study concludes that double pass arrangement with porous material is economical and having short payback period. Also, the thermal performance of double pass solar air collector with porous material is significantly higher compared to double pass solar air collector without porous material and single pass arrangement.

Experimental Investigation of Double Pass Solar Air Collector for Using in Agricultural Applications

2020 ◽  
pp. 98-117
Author(s):  
Mohammed Fahmi ◽  
Wissam Khalil ◽  
Amer Shareef
Keyword(s):  
Thermal Performance ◽  
Winter Season ◽  
Longitudinal Direction ◽  
Absorber Plate ◽  
Double Pass ◽  
Solar Air Collector ◽  
Agricultural Applications ◽  
Good Technique ◽  
Extended Surfaces ◽  
Good Agreement

In this research, an experimental study has been performed in order to enhance the thermal performance of a double-pass solar air collector by employing extended surfaces. In order to increase the heat transfer area, triangular-shaped fins were mounted on the longitudinal direction of the absorber plate. Four models of the solar air collectors were made of aluminum with different fin configurations. The experiments were carried out at the winter season in the climate of Iraq - Ramadi city with longitude 43.268 and latitude (33.43). The used range of mass flow rate in the experiments was from 0.027 kg/s to 0.037 kg/s. The comparison with previous studies in terms of thermal efficiency showed good agreement where the percentage of error does not exceed 1% between them. The results also provided that the existing of fins was a good technique for enhancing the thermal performance of double-pass solar air collector with a marginal increase in pressure drop. Consequently, it is possible to adopt this kind of solar air collectors for many agricultural applications such as solar dryer.

scholarly journals Numerical study on thermal performance of a solar air collector with fins and baffles attached over the absorber plate

2017 ◽  
Vol 35 (2) ◽  
pp. 289-296
Author(s):  
Faris Aissaoui ◽  
Abdelmoumene Benmachiche ◽  
Abdelhafid Brima ◽  
Yousef Belloufi ◽  
Moussa Belkhiri
Keyword(s):  
Thermal Performance ◽  
Numerical Study ◽  
Absorber Plate ◽  
Solar Air Collector

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

EXPERIMENTAL AND THEORETICAL ANALYSES ON THERMAL PERFORMANCE OF A SOLAR AIR COLLECTOR

2014 ◽  
Vol 13 (8) ◽  
pp. 1965-1970 ◽  
Author(s):  
Spiru Paraschiv ◽  
Lizica Simona Paraschiv ◽  
Ion V. Ion
Keyword(s):  
Thermal Performance ◽  
Solar Air Collector ◽  
Theoretical Analyses
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