Some considerations for the heating of greenhouses with geothermal energy

Abstract In the past few years, geothermal space heating of greenhouses has been the object of much interest in the United States. The purpose of this paper is to provide those unfamiliar with the subject with a brief introduction to heat loss and heating system design methods. Peak heat loss calculations for the most common construction methods are covered. In addition, a brief method of calculating annual energy requirements is presented. Finally, design approaches for five heating systems are described. The systems include finned pipe, unit heaters, finned coils, radiant floor panel and bare plastic tubes.