TY - JOUR
TI - An experimental investigation of performance of a double pass solar air heater with thermal storage medium
AU - Ali Hafiz Muhammad
AU - Bhatti Arslan Iqbal
AU - Ali Muzaffar
JN - Thermal Science
PY - 2015
VL - 19
IS - 5
SP - 1699
EP - 1708
PT - Article
AB - The performance of a double pass solar air heater was experimentally  investigated using four different configurations. First configuration  contained only absorber plate whereas copper tubes filled with thermal  storage medium (paraffin wax) were added on the absorber plate in the second  configuration. Aluminum and steel rods as thermal enhancer were inserted in  the middle of paraffin wax of each tube for configurations three and four  respectively. Second configuration provided useful heat for about 1.5 hours  after the sunset compared to first configuration. Configurations three and  four provided useful heat for about 2 hours after the sunset. The maximum  efficiency of about 96% was achieved using configuration three (i.e. using  Aluminum rods in the middle of copper tubes filled with paraffin wax).