Abstract
The objective was to design a prototype greenhouse heating system utilizing warm water from a specific electric power generating station. To take into account the effects of changes in factors affecting greenhouse energy requirements, computer simulation was extensively used to evaluate a number of possible designs. Site-specific information was available on the weather and the temperature of the power plant's condenser discharge water at hourly intervals over the entire year. The computer simulation program was used to compare different design options and to explore the interactions between heating systems, power plant water and outside ambient temperatures, and temperature control strategies. Using the results of the computer studies a 1.1-ha prototype was designed and constructed. It operated successfully throughout the 1980–81 heating season. In the fall a poinsettia crop was produced and in the spring there were lilies, pot mums, other potted plants and a bedding plant crop of tomatoes.
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