Similar Search Results

Performance improvement of wire mesh packed double-pass solar air heaters with external recycle

Ho, Chii-Dong; Lin, Chun-Sheng; Chuang, Yu-Chuan; Chao, … - In: Renewable Energy 57 (2013) C, pp. 479-489

The device performance of the new design of wire mesh packed double-pass solar air heaters with attaching wire mesh under external recycle was investigated experimentally and theoretically. The improvement of device performance of wire mesh packed solar air heaters with different flow patterns...

Persistent link: https://www.econbiz.de/10010807237

Heat transfer and friction factor correlations for a duct having dimple-shape artificial roughness for solar air heaters

Saini, R.P.; Verma, Jitendra - In: Energy 33 (2008) 8, pp. 1277-1287

The heat transfer coefficient between the absorber plate and air can be considerably increased by using artificial roughness on the underside of the absorber plate of a solar air heater duct. Under the present work, an experimental study has been carried out to investigate the effect of...

Persistent link: https://www.econbiz.de/10010808300

A review on methodology of artificial roughness used in duct of solar air heaters

Bhushan, Brij; Singh, Ranjit - In: Energy 35 (2010) 1, pp. 202-212

In order to enhance rate of heat transfer to flowing air in the duct of a solar air heater, artificially roughened surface of absorber plate is considered to be an effective technique. Investigators reported various roughness geometries in literature for studying heat transfer and friction...

Persistent link: https://www.econbiz.de/10010808656

Exergetic performance evaluation and parametric studies of solar air heater

Gupta, M.K.; Kaushik, S.C. - In: Energy 33 (2008) 11, pp. 1691-1702

The present study aims to establish the optimal performance parameters for the maximum exergy delivery during the collection of solar energy in a flat-plate solar air heater. The procedure to determine optimum aspect ratio (length to width ratio of the absorber plate) and optimum duct depth (the...

Persistent link: https://www.econbiz.de/10010809344

Exergetic performance evaluation of a single pass baffled solar air heater

Sabzpooshani, M.; Mohammadi, K.; Khorasanizadeh, H. - In: Energy 64 (2014) C, pp. 697-706

In this study, the exergetic performance of a baffled type solar air heater has been evaluated theoretically. A detailed parametric study was done to investigate the effect of variation of fin and baffle parameters, number of glass covers, bottom insulation thickness and inlet air temperature at...

Persistent link: https://www.econbiz.de/10010810472

Investigation of the thermohydraulic performance of impinging jet solar air heater

Chauhan, Ranchan; Thakur, N.S. - In: Energy 68 (2014) C, pp. 255-261

Jet impingement is an established method of convective heat transfer from the heated surface to the carrier fluid. High heat transfer rates are achieved using impinging jets in solar air heater duct but at the cost of increased friction power penalty. This paper presents thermohydraulic...

Persistent link: https://www.econbiz.de/10010810722

Effective efficiency of solar air heaters having different types of roughness elements on the absorber plate

Mittal, M.K.; Varun; Saini, R.P.; Singal, S.K. - In: Energy 32 (2007) 5, pp. 739-745

The use of an artificial roughness on a surface is an effective technique to enhance the rate of heat transfer to fluid flow in the duct of a solar air heater. This paper presents a comparison of effective efficiency of solar air heaters having different types of geometry of roughness elements...

Persistent link: https://www.econbiz.de/10010810801

Optimized mass flux ratio of double-flow solar air heater with EHD

Kasayapanand, N.; Kiatsiriroat, T. - In: Energy 32 (2007) 8, pp. 1343-1351

The numerical study of laminar forced convection inside double-flow solar air heater with electrohydrodynamic technique is investigated by finite difference method. The electric field is generated by the wire electrodes charged with DC high voltage. The mathematical modeling of computational...

Persistent link: https://www.econbiz.de/10010811030

Performance of solar air heater ducts with different types of ribs on the absorber plate

Tanda, Giovanni - In: Energy 36 (2011) 11, pp. 6651-6660

establish the performance of rib-roughened channels, both heat transfer and friction characteristics have to be accounted for … considered as rib configurations. Different performance evaluation criteria, based on energy balance or entropy generation … analysis, were proposed to assess the relative merit of each rib configuration. All the rib-roughened channels performed better …

Persistent link: https://www.econbiz.de/10010811247

Comprehensive performance evaluation and parametric studies of single pass solar air heater with fins and baffles attached over the absorber plate

Mohammadi, K.; Sabzpooshani, M. - In: Energy 57 (2013) C, pp. 741-750

This study investigates the influence of fins and baffles attached over the absorber plate on the performance of the upward type single pass solar air heater. A steady-state mathematical model is presented and solved theoretically. The performance evaluation is studied in terms of different...

Persistent link: https://www.econbiz.de/10010811280