Experimental Studies of Air Dehumidification Using Synthetic Semipermeable Membranes in Air Conditioning Systems
Journal Title: Вентиляція, освітлення та теплогазопостачання - Year 2018, Vol 24, Issue
Abstract
Storage of agricultural products in regulated conditions requires year-round and round-the-clock maintenance of the air environment parameters - temperature and relative humidity - in certain ranges, which are established by the technological regulations for each type of such products. To maintain relative humidity, air conditioning systems are equipped with dehumidification sections. During dehumidification, air conditioning systems consume a large amount of energy compared to other air treatment stages. Modern research in the field of technological air conditioning is aimed at increasing the efficiency of air treatment processes with simultaneous reduction of energy costs. In recent studies, mainly adsorption drying processes are used, which do not reduce radically the energy expenditure. Semipermeable membranes have not been widely used in air conditioning systems, but have a realistic prospect of providing energy-efficient dehumidification in air conditioning systems compared to traditional condensation and adsorption methods. They allow, in addition, reducing the energy consumption for air-drying, avoiding the negative phenomenon of icing of the heat exchanger. In this paper, we present the results of experimental studies to evaluate the feasibility of using semipermeable membranes for drying air in a storage warehouse for agricultural products. The results of experimental studies of moisture content reduction in the membrane dehumidification section are presented; the experimental dependence of drainage performance on the specific air load on the membrane is given. The obtained results allow the practical application of membrane dehumidification in the successive multistage treatment of air in air conditioning systems with alternating cooling and membrane drying of air
Authors and Affiliations
О. О. Zadoyannyi, Yu. Evdokimenko
Keywords
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