Dynamic climate model of a greenhouse

Abstract

Greenhouses are more and more used nowadays, irrespective to the climatic condition of the area, in order to provide favourable environment conditions for the growth and development of plants. In addition to giving protection from the effects of wind, rain and snow, the temperature inside the greenhouse is increased during the day by solar radiation. As the rate of plants growth is doubled for a 10 K rise in temperature up to a certain limit, higher temperatures are important for the economic production of commercial crops in greenhouses, and some pretentious species require greenhouses to be heated at night and also during the day, if the solar radiation is low. To predict the temperatures which occur naturally in a greenhouse, and the energy needed to achieve any desired temperature, requires an understanding of thermal behaviour of the greenhouse. This, in turn, requires knowledge of the ways in which energy is transferred through the greenhouse. In this respect, the simulation of the thermal aspects of the greenhouse is a powerful tool in predicting and assuring the proper environmental conditions for the under the glass grown plants. It can be asserted that technical solutions can improve the actual negative economic situation of agricultural geothermal projects in Romania. Simulation is a proper approach to many of the problems encountered here, which influence the design of greenhouse and thus the utilization of geothermal energy in greenhouse heating. Simulation enables investigation of the changes of the climate and other influencing parameters and demonstration of the possibilities of the geothermal heating installations in greenhouse heating. In this paper the development of a dynamic climatic model of a greenhouse ...