10.2190/X33K-9YAC-0075-L67L X33K9YAC0075L67L 1 An Evaporative Pad Greenhouse Model for Waste Heat Utilization Assessment 185 209 20020509 20020509 20020509 20020509 X33K9YAC0075L67L.pdf http://baywood.metapress.com/link.asp?target=contribution&id=X33K9YAC0075L67L 3 John D. Keenan Robert N. Amundsen University of Pennsylvania New York Institute of Technology This is the third in a series of articles on the development of a methodology for assessing waste heat utilization technologies and optimizing the mix of technologies used on a site-specific basis. As part of this effort a model of an evaporative pad heating greenhouse has been developed. This model uses readily obtainable data regarding plant kinetics and climate conditions. The outputs include the time to harvest, crop yield, and mass flow rates of heated water in and out of the greenhouse required to maintain the desired temperature. 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