Vybor optimal'noy konstruktsii teploobmennika regenerativnogo kosvennoisparitel'nogo okhlazhdeniya v sostave kombinirovannoy ustanovki konditsionirovaniya vozdukha

To increase energy efficiency of vaporcompression air condition units it is advisable to use an additional regenerative indirect evaporative cooling with an indirect evaporative heat exchanger (IEHE). The paper gives the diagram of the combined air condition units, describes the principle of operation using IEHE as well as the IEHE constructions; the construction may be of two operating modes: crossflow and counterflow. The diagrams of the plant with the crossflow and counteflow IEHE are given in the paper. The tests of two types of IEHE were carried out to define which of them was more efficient. The operation of the heat exchangers were compared under conditions of dry, temperate and humid climate; the efficiency of the system was estimated by the “wet” thermometer and the duepoint temperature. The experiments showed the advantages of the counterflow system of flows in the IEHE that provided the efficiency higher by 30-50%. It was demonstrated that the preferable mode of water supply into the IEHE was that by the heat pump as the capillary forces could not wet to the right degree under hot climate conditions. The efficiency of the system may be enhanced using a humidifier of additional flow installed before the inlet into the IEHE. Keywords: air condition units, regenerative indirect evaporative cooling, indirect evaporative heat exchanger, crossflow and counterflow heat exchanger, efficiency of indirectvapor cooling.

установка кондиционирования воздуха, регенеративное косвенноиспарительное охлаждение, косвенноиспарительный теплообменник, перекрестноточный и противоточный теплообменник, эффективность косвенноиспарительного охлаждения