Development of hybrid PV solar collector for heating agricultural systems / [electronic resource].

Year book of Misr Society of Agricultural Engineering : The 20 th. Annual Conference of the Misr Society of Agricultural Engineering "Agricultural Engineering and Country Challenges"

Includes references.

Most of the research studies are based on the accumulation of energy during the daylight.
Delivering it at night times. And on the energy conservation for heating of greenhouse in winter. The aim of the current study was to develop a hybrid solar collector as the main part in a heating greenhouse system. The hybrid PV solar collector was manufactured and constructed in the laboratory of the Agricultural Engineering Department, Faculty of Agriculture. Kafr Elsheikh University. As well as the developed hybrid PV was tested and compared to vacuum tube EOS-15-HP in the experimental farm. The hybrid PV solar collector l has a net surface area of 1,0 m2 . Results indicated that the highest average value of the solar radiation was 803.2 W m-2 in May 2015 and the lowest one was 3-14.18W m-2 in December 2014. The maximum value of monthly average hot water temperature from the developed collector reached 50.4°C in May and 3l.5°C in December. On the other hand. The maximum hot water temperature from the vacuum tube collector reached -I2.3°C in May and 29°C in December. The monthly average overall thermal efficiency values were 83.7 % in December and 76.5 % in May for the developed flat plate solar collector compared to 45.3 % and 41.2 % for vacuum tube solar collector in December and May respectively. The percentages of the provided energy to heat the greenhouse, tend to increase from winter to summer for both hybrid and vacuum tube collectors. The hybrid PV solar collector provided 18.97 % and 46.16 %
Of the heating energy requirement when operating the hybrid PV collector without and with heater respectively. The vacuum tube collector produced not enough heating energy requirement in winter.

Summary in Arabic