Indoor temperature field numerical simulation of a novel greenhouse in winter and summer

This study compared the effect of heat preservation in winter and ventilation and cooling in summer of a novel greenhouse,traditional solar-greenhouse and plastic greenhouse based on the theory of computational fluid dynamics( CFD).The new type of greenhouse has the same structure as traditional solar-greenhouse.But its north wall and north roof are covered by straw board.In winter,the straw board can play the important role of thermal insulation in order to improve the temperature of indoor at night.While in summer,the straw board was removed for ventilation and cooling.The result shows that in winter,the temperature difference between new greenhouse and traditional solar-greenhouse is from 0 ℃ to 0.9 ℃ in daytime and 0 ℃ to 0.7 ℃ at night.The temperature of the new greenhouse is 0-5 ℃ higher than that of plastic greenhouse's.In summer,there are no obvious differences between both in indoor temperatures and ground temperatures of the new type greenhouse and plastic greenhouse when the vents are closed.But when the vents are opened,the new type greenhouse is superior to plastic greenhouse in interior temperature distribution.