Theoretical and Experimental Studies for a Double Pass Solar Air Heater

The performance characteristics of double pass solar air heater (DPSAH) were evaluated theoretically and experimentally. Actual hourly weather data for Baghdad, Iraq was used to assess the DPSAH in December 2016 and January 2017. The results of the study indicated that increasing airflow rate through the collector increases the instantaneous efficiency and the useful energy gained but it reduces the air outlet temperature rapidly. An air outlet temperature was about 37 C at midday for airflow rate of 0.01 m/s. The maximum value of the average performance line was 63 %. It was found that the present DPSAH outlet air temperature greater than single pass solar air heater (SPSAH) by 3 C for the same airflow rate. Moreover, the average difference between the theoretical and the experimental results was 3 %.

[1]  B. N. Prasad,et al.  Effect of artificial roughness on heat transfer and friction factor in a solar air heater , 1988 .

[2]  Hsuan Chang,et al.  Analytical and Experimental Study of Recycling Baffled Double-Pass Solar Air Heaters with Attached Fins , 2013 .

[3]  J. M. Coulson,et al.  Heat Transfer , 2018, Finite Element Method for Solids and Structures.

[4]  Faramarz Sarhaddi,et al.  Exergy loss-based efficiency optimization of a double-pass/glazed v-corrugated plate solar air heater , 2016 .

[5]  Alejandro Luis Hernández,et al.  Analytical models of thermal performance of solar air heaters of double-parallel flow and double-pass counter flow , 2013 .

[6]  Arslan Iqbal Bhatti,et al.  AN EXPERIMENTAL INVESTIGATION OF PERFORMANCE OF A DOUBLE PASS SOLAR AIR HEATER WITH THERMAL STORAGE MEDIUM , 2014 .

[8]  Silvana Flores Larsen,et al.  Thermal Evaluation and Modeling of a Double-pass Solar Collector for Air Heating , 2014 .

[9]  Ranchan Chauhan,et al.  A review of the performance of double pass solar air heater , 2012 .

[10]  R. P. Saini,et al.  A review on different techniques used for performance enhancement of double pass solar air heaters , 2016 .

[11]  R. P. Saini,et al.  Experimental investigation on performance of a double pass artificial roughened solar air heater duct having roughness elements of the combination of discrete multi V shaped and staggered ribs , 2016 .

[12]  Venkataramana Gadhamshetty,et al.  Improving Air-Cooled Condenser Performance in Combined Cycle Power Plants , 2006 .

[13]  Ritesh Lahori,et al.  A Review on Different Methods Used for Performance Enhancement of Solar Air Heater , 2016 .