I have studied in solar thermal application like prince 40. solar cooker work on the basic principle l : Sunlight is converted to heat energy, that is used for cooking. I cooking a rice in prince 40 system. firstly I washing cooker and prince 40 cooking system. Then I have weight 250 gm rice & 500gm water. and adjusting prince 40 system. then cooker putting in prince40.
some calculation part
Given
weight of cooker : 1074gm,rice weight 250 gm, weight of water 500.temp of water 27.
1) Time : 11.10 ,solar radiation 1005 =w per m^2 .Focal point temperature =51.4 , other side temp 37.2
2) Time 11:20 ,solar radiation = 1045 w per m^2 .Focal point temperature =69 , other side temp 42.
3) Time : 11.30,solar radiation =1113 w per m^2 .Focal point temperature=82 , other side temp=72
4) Time : 11.40 ,solar radiation =1110 w per m^2 .Focal point temperature =92 , other side temp=42
5) Time : 11.50 ,solar radiation =1109 w per m^2 .Focal point temperature=85 , other side temp=47.
7) Time : 12.00 ,solar radiation= 1110 w per m^2 .Focal point temperature =92 , other side temp =70.
ready cooking weight :– 745 gm
Time period in ready rice :– 1 hour =3600 second
Efficiency = output /energy insolation *100
Rice
by using formula of efficiency
=0.25*0.78*(71-27)
=0.25*0.78*44
=8.58 KJ ….1
water
by using formula of efficiency
=0.25*1*(100-27)
=0.25*73
=18.25 K …………….2
equation 1&2…….
= 8.58+18.25/3600
= 0.0075 KJ/sec
Avarage Solar Rotation
=R 1+R 2+R 3+R 4+R 5+R 6 / 6
=1005+1045+1113+1110+1109+1110 / 6
=6492 / 6 = 1082 W per m^2
Total prince 40 area =54984 cm square.
Total overlaping area =74.26 cm square.
Working area =5.49 meter square.
=7.5 watt
= 7.5 / 1082*5.49
Efficiency =3.80%
