Experimental study on the thermal performance and pressure drop of a solar air collector based on flat micro-heat pipe arrays

Abstract A new solar air collector that combines the use of flat micro-heat pipe arrays (FMHPA) and evacuated tube is developed and investigated. Using FMHPA as the central transporting component in a solar air collector is an effective approach to improve the collector’s thermal properties and reduce its pressure drop. The thermal properties and pressure drop of the FMHPA solar air collector are analyzed in detail. The main objective of this paper is to report test results of the FMHPA solar air collectors which includes the effects of different seasons and airflow rates on the thermal efficiency and the pressure drop of the air collector. In summer, the thermal efficiency of the collector reaches 73% under stable operation. In the testing airflow range condition, the pressure drop is less than 25 Pa when the flow rate is below 201.6 m 3 /h. The relative uncertainty of thermal efficiency is approximately 7.73%.

[1]  Giovanni Tanda,et al.  Performance of solar air heater ducts with different types of ribs on the absorber plate , 2011 .

[2]  K. S. Ong.  Thermal performance of solar air heaters: Mathematical model and solution procedure , 1995 .

[3]  A. P. Omojaro,et al.  Experimental performance of single and double pass solar air heater with fins and steel wire mesh as absorber , 2010 .

[4]  Mohammad Nurul Alam Hawlader,et al.  Development of solar air collectors for drying applications , 2004 .

[5]  Wei Wang,et al.  Experimental investigation of performance for the novel flat plate solar collector with micro-channel heat pipe array (MHPA-FPC) , 2013 .

[6]  A. Farhat,et al.  Performance of a new solar air heater with packed-bed latent storage energy for nocturnal use , 2013 .

[7]  A. S. Abdullah,et al.  Performance of cylindrical plastic solar collectors for air heating , 2014 .

[8]  J. Parise,et al.  Analysis of a v-groove solar collector with a selective glass cover , 1986 .

[9]  Adel A. Hegazy,et al.  Optimum channel geometry for solar air heaters of conventional design and constant flow operation , 1999 .

[10]  Fatih Koçyiğit,et al.  Experimental investigation of thermal performance of solar air heater having different obstacles on absorber plates , 2010 .

[11]  Sukhmeet Singh,et al.  Low cost solar air heater , 2012 .

[12]  A. El-sebaii,et al.  Year round performance of double pass solar air heater with packed bed , 2007 .

[13]  Y. P. Yadav,et al.  Parametric analysis of a suspended flat plate solar air heater , 1995 .

[14]  Hassan E.S. Fath.  Thermal performance of a simple design solar air heater with built-in thermal energy storage system , 1995 .

[15]  N. Hatami,et al.  Experimental determination of natural convection heat transfer coefficient in a vertical flat-plate solar air heater , 2008 .

[16]  Chii-Dong Ho,et al.  Collector efficiency of upward-type double-pass solar air heaters with fins attached ☆ , 2011 .

[17]  Kamaruzzaman Sopian,et al.  Energy analysis and improvement potential of finned double-pass solar collector , 2013 .

[18]  S. C. Solanki,et al.  Thermo-hydraulic performance of solar air heaters having integral chamfered rib roughness on absorber plates , 2001 .

[19]  Manish Mishra,et al.  Performance characteristics of solar air heater with surface mounted obstacles , 2014 .

[20]  Ruzhu Wang,et al.  Experimental investigation on air heating and natural ventilation of a solar air collector , 2005 .

[21]  Paisarn Naphon,et al.  Effect of porous media on the performance of the double-pass flat plate solar air heater☆ , 2005 .

[22]  I. T. Toğrul,et al.  The performance of a solar air heater with conical concentrator under forced convection , 2003 .

[23]  Feng Zhao,et al.  Thermal performance of an open thermosyphon using nanofluid for evacuated tubular high temperature air solar collector , 2013 .

[24]  Azharul Karim,et al.  Performance evaluation of a v-groove solar air collector for drying applications , 2006 .

[25]  F. K. Forson,et al.  Experimental and simulation studies on a single pass, double duct solar air heater , 2003 .

[26]  A. Lashkari,et al.  Performance evaluation of a natural-convection solar air-heater with a rectangular-finned absorber plate , 2011 .