Bilenko N. Improving the energy efficiency of atmospheric water systems

The system of water production is offered in the work, the proposed system for obtaining water from atmospheric air based on VCT with combined sources of electrical energy significantly exceeds absorption schemes in terms of cooling capacity. A distinctive feature of this proposal is the use of an AC compressor, which significantly reduces the cost of the product. It is proposed for such a compressor to use solar panels with a DC-to-AC converter during daylight hours. The starting current, with periodic starting of the electric motor of the VCT compressor, is supplied for a short time from a stationary network source of electrical energy. In the dark, in the evening and in the morning, the VCT can operate from a stationary network source of electrical energy, both in the mode of obtaining water and in the mode of air conditioning. Systems for obtaining water from atmospheric air based on VCT are most effective at ambient air temperatures of 35…40 °С and relative humidity over 70 % The proposed AWT modification with an adiabatic solution evaporator can operate as part of systems for obtaining water from atmospheric air at hot source temperatures from 100 °C and quite constructively fits into the element base of typical models. On average, the solution evaporator is about 10 % of the absorber surface. Despite the positive experience of using radial capillary notch in the designs of absorbers and evaporators of ammonia AWT, further studies of AWT will need to study the degree of its influence on the processes of heat and mass transfer during the evaporation of solution in VGM facilities. When modeling and calculating the process of ammonia evaporation from a weak WAS in an VGM facility, the analogy of the reverse process in the direction of the absorption of ammonia vapors from an VGM facility by a weak WAS used. The proposed universal scheme of AWT with two booster-compressors can significantly increase the operational characteristics of not only the cold source, but also the reliability of the system for obtaining water from atmospheric air as a whole. AWT allows solving the problems of air conditioning in residential and public premises, heating, obtaining water from atmospheric air and cold storage of fruits, vegetables and other agricultural products and raw materials. The scheme also allows you to quickly respond to changes in operating conditions in terms of temperatures of the heat source and the environment.