Hot water demand

of a building is $50$ Liperson$/$day and an average occupancy of the building is $50$ people. The

supplied cold water temperature is $20$ oC and the hot water temperature at the storage is $55$oC$.$

The average solar radiation of the site is $4\mathrm{.}5$ kWh$/$mztday$.$ Estimate the collector area

requirement for the given demand when system efficiency of the collector rs $80$Vo and the

collector efficiency is $60$V