From the experimental, the average efficiency is 56.43% and for efficiency of each day show in
Fig.2. The average inlet temperature (T1) is 44.49 ºC, the average outlet temperature (T2) is 68.61 ºC, the average ambient temperature (T6) is 33.82 ºC , the storage temperature in average is 55.92 ºC, and for the collector average temperature is 56.77 ºC.