Study of the Performance of Greenhouse with Short Term Heat Storage and Night Insulation
Abstract
The optimal air temperature inside the greenhouse is 18-25°C. The main surface of the greenhouse bulk is light translucent enclosures, which have low thermal resistance, so for obtaining desired temperature in the greenhouse required more heat, than other types of buildings. Location of Uzbekistan is convenient to use solar energy to provide the required level of temperature in the greenhouse. The air temperature inside the greenhouse depends on many factors, such as ambient temperature, intensity of the incident solar radiation, greenhouse orientation, angles of slopes, materials of enclosures and etc. Fluctuation of air temperature inside the greenhouse with large amplitudes is negative influence for plant growth. One of solutions of the problem is accumulation of heat (thermal energy) during the day and using it at night. In this case it is required to determine and optimize the location and quantity of heat storage. In this work presented some results of investigations of thermal properties of greenhouse with short- term heat storage, which placed in front of the object with night insulation covering. Developed mathematical model of dynamic thermal mode of the system and corresponding experiments in Bukhara Province, Uzbekistan (39.1 o latitude).