Abstract

The efficiency of greenhouse design is its ability to receive and accumulate heat from solar radiation. Lots of factors affect the efficiency of greenhouse. One of the main factors is the shape of the greenhouse. The greenhouse shape affects the amount of solar heat gain that received the greenhouse and the amount of heat losses during cold season. The purpose of this research is to determine the optimal shape of greenhouse by the criteria of solar heat gain and heat losses through the covering to reduce total energy consumption and improve energy efficiency of the greenhouse. The five most commonly used greenhouse shapes were considered. In order to determine the optimal shape of energy efficient greenhouse the calculations of the total solar heat gain during the year and heat losses during the cold period (October-April) for the five most common shapes of greenhouses were made. The comparison of solar heat gains and heat losses through enclosing constructions of greenhouses was made.

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