Experimental Study of Thermal Performance of One-Ended Evacuated Tubes for Producing Hot Air

The thermal performance of an evacuated tube solar air collector is experimentally investigated at different air flow rates. Air is used as a working fluid in experimental setup and tested in Indian climatic conditions. The evacuated tube solar air collector consists of fifteen evacuated tubes and manifold channel. The manifold channel consists of a hollow pipe (square pipe) in centre through which air flows. The temperature difference and efficiency are studied with different air flow rates. The reflectors are used to enhance the performance of evacuated tubes solar air collector. It is observed that in case of reflector evacuated tube solar air collector gives higher outlet temperature and temperature difference and has better thermal performance as compared to the case without reflector. The maximum outlet temperature and temperature difference of air are found to be 97.4°C and 74.4°C at a flow rate of 6.70 kg/hr.

[1]  Ruobing Liang,et al.  Thermal performance analysis of the glass evacuated tube solar collector with U-tube , 2010 .

[2]  Masud Behnia,et al.  Water-in-Glass Evacuated Tube Solar Water Heaters , 2004 .

[3]  Simon Furbo,et al.  Theoretical flow investigations of an all glass evacuated tubular collector , 2007 .

[4]  H. P. Garg,et al.  Thermal performance of a solar pressure cooker based on evacuated tube solar collector , 2001 .

[5]  N. Kyriakis,et al.  Experimental investigation and thermodynamic performance analysis of a solar dryer using an evacuated-tube air collector , 2012 .

[6]  Avadhesh Yadav,et al.  Thermal performance of one-ended evacuated tube solar air collector at different flow rates: experimental investigation , 2012 .

[7]  H. P. Garg,et al.  Thermal analysis of an evacuated tube collector module , 1988 .

[8]  Graham L. Morrison,et al.  Performance of a Water-in-Glass Evacuated Tube Solar Water Heater , 2001 .

[9]  Michel Hayek,et al.  Experimental Investigation of the Performance of Evacuated-Tube Solar Collectors under Eastern Mediterranean Climatic Conditions , 2011 .

[10]  Yong Kim,et al.  Thermal performances comparisons of the glass evacuated tube solar collectors with shapes of absorber tube , 2007 .

[11]  Simon Furbo,et al.  Vertical evacuated tubular-collectors utilizing solar radiation from all directions , 2004 .

[12]  Masud Behnia,et al.  Measurement and simulation of flow rate in a water-in-glass evacuated tube solar water heater , 2005 .