A simplified design procedure for solar heating systems for greenhouses is presented. Computer modeling and simulations were carried out to analyze the effects of design variations in greenhouse construction and storage characteristics on long-term average system thermal performance. The key performance indices were defined in terms of the total solar contribution and solar heating fraction. The results of many simulations were transformed into correlations between monthly solar load ratio and the performance indices. Knowing monthly average meteorological data, designers and engineers can readily extract the necessary technical information for subsequent economic analysis to select the most cost-effective solution for a given design problem.

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