THEORETICAL RESEARCH REGARDING HEAT TRANSFER BETWEEN GREENHOUSES AND ENVIRONMENT

Abstract

Because the greenhouse heating costs represents approximately 40% of the total cost production, heat loss must be kept under control and even lower, which leads us first to understand the way in which heat transfer occurs between the greenhouses and the environment. Heat loss from a greenhouse usually occurs by all three modes of heat transfer: conduction, convection and radiation. Usually many types of heat exchange occur simultaneously. The heat demand for a greenhouse is normally calculated by combining all three losses as a coefficient in a heat loss equation. In the paper the author’s presents from the theoretical point of view the impact and the calculation of heat loss in greenhouses.