| Popis: |
In the present study three different collector cover materials, single or, double glazing and Polyethylene-plastic cover materials three different adsorbent material masses 12, 14 and 16 kg were used respectively for the determination of the optimal collector cover material and adsorbent mass proportion to methanol quantity. Collector thermal efficiency as affected by daily incident solar radiations kW.hr/m2/day and their effect on methanol saturation which directly reflected on the coefficient of performance for the refrigeration cycle were studied. Refrigeration load in ton of refrigeration and economical evaluation were also studied. Results showed that daily average solar radiation during these experiments was ranged between 6.6 to 7.9 kW.h/m2.day, the double glass cover material has the largest efficiency than both of single and polyethylene-plastic sheet, the thermal efficiency of single, double glazing and polyethylene plastic sheet cover were30.27%, 39.83% and 30.22% respectively. It is clear that the double glazing cover is the optimal cover material of all studied cover materials. Higher values of C.O.P % and refrigeration load were recorded for the 14 kg carbon mass than that of 12and 16 kg carbon mas. |
