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Table 3

Energy payback time (EPBT) for solar stills

ParametersFSSDSS
Yield per month (kg) 6.75 7.35 
Embodied energy (kWh) 323.25 313.61 
Enout per month (kWh) 4.58 4.98 
Exout per month (kWh) 0.28 0.30 
EPBTen (months) 70.66 62.95 
EPBTex (months) 1,140.86 1,042.07 
ParametersFSSDSS
Yield per month (kg) 6.75 7.35 
Embodied energy (kWh) 323.25 313.61 
Enout per month (kWh) 4.58 4.98 
Exout per month (kWh) 0.28 0.30 
EPBTen (months) 70.66 62.95 
EPBTex (months) 1,140.86 1,042.07 
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