Analysis of common cooling towers used in water-cooled chillers
     Hot tool change of water cooling is the main cooling tower, cooling tower is the main equipment in the circulating cooling water system of water cooling heat exchanger used, its performance determines the condensing temperature of the refrigeration system, also determines the performance of the cooling water system.
     Now the chiller commonly used cooling tower is usually strong cooling capacity, light weight and easy installation of glass steel suction counterflow cooling tower, cooling tower of the tower is made of glass steel, the water tower is arranged on the top of suction fan, the reverse flow of water and air. When the air and water reverse flow, because the water temperature is usually higher than the temperature of the air water, the two heat exchange, take away part of the heat.
     The air enters the tower, tower from the lower circumference of the bottom-up flow, the upper cold water machine after use warm water by the pump into the cooling tower, the fan out from the top of the tower; a rotary water distributor of many nozzles or nozzle spray cooling down, the water flowing out from the bottom of the tower.      So as to achieve the purpose of cooling the cooling system. Because the saturated vapor pressure of water is higher than the partial pressure of water vapor in the air, some of the water evaporates and takes away the latent heat of vaporization. Under the combined action of heat exchange, the temperature of the water decreases, the air temperature rises, the humidity rises, and the relative temperature increases.
     The advantage of low temperature water cooler in industrial refrigeration
     Low temperature cold water machine is mainly used in cold environment of the enterprise, due to the low temperature cold water machine can be achieved between 0 DEG -40 DEG freely adjust the refrigeration function without difficulty, therefore can meet the domestic demand for change in temperature field, due to the low temperature cold water machine mainly under air cooling to zero temperature, need air the water vapor condenses into water, so the modern cold water machine equipment is usually need dehumidifier and compressor auxiliary work.
     In comparison with ordinary refrigerator, the temperature of -20 DEG /-25 DEG low temperature cold water machine can realize the chilled water inlet and water; cooling air temperature and 30 DEG /38 DEG from the data, we can see the low temperature cold water machine working efficiency is very good, because the low temperature cold water machine, more than 80% of the domestic use of imported low-temperature compressor, in under the guarantee of adequate working efficiency, can greatly prolong the service life of the chiller temperature, save a large number of enterprises for later maintenance costs.
     Low temperature cold water machine with advanced technology of new low temperature cold water machine adopts the international famous brand enterprises as parts suppliers, due to the quality of the accessories is excellent, compared with ordinary refrigeration equipment, cold water machine running state is more stable, at the same time can provide the lower temperature, with good water pump help to achieve the purpose of high flow, at the same time improve the body to withstand low temperatures, high efficiency in protecting the environment, low temperature cold water machine also has long service life, low failure rate.
      The traditional refrigeration machine accessories is relatively backward, and the low temperature cold water machine adopts full stainless steel water tank type evaporator, automatic replenishment process and all timely and effectively under the control of the microcomputer, so the low temperature cold water machine in the maintenance process, the cleaning process is very simple, fully benefited from the design quality.
      Due to the low temperature cold water machine with advanced technology, simple process and maintenance, even failure, also can easily complete the repair process, the present method of maintenance new gradually replaced the traditional maintenance method, using life to provide protection for the extension of low temperature cold water machine.
      Determination of liquid subcooling temperature before throttling of industrial chiller
      Liquid in the throttle too cold, in general, to improve the refrigeration cycle of cold water economy is always beneficial, but will increase the equipment investment and direct operating costs. Actual use should also consider the specific conditions, technical and economic analysis to determine whether the use of liquid over cooling.
     The determination of the liquid supercooling temperature before the throttling of the industrial chiller can be selected according to the following experience.

      In single stage compression system, the cooling of the liquid before throttling is realized in the gas liquid heat exchanger, and the cooling degree is generally 5 DEG C. In the two-stage compression system, the liquid before the throttling is generally over cooled for the past two times. The first is in the middle cooling, and then in the gas liquid heat exchanger. The liquid temperature of the cooling coil of the intermediate cooler is 5 to 7 DEG C higher than that of the two-stage compression intermediate temperature, and the liquid in the gas liquid heat exchanger is over cooled at the temperature of 5 DEG C.

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