Basic Principle and Application of Water Chiller2019-07-16 16:20:21
Chillers are divided into air-cooled chillers and water-cooled chillers in the industry. Chillers are divided into cryogenic chillers and normal-temperature chillers in temperature control. Normal temperature is generally controlled in the range of 0-35 degrees. The temperature control of cryogenic machine is generally in the range of 0 - 100 degrees below zero.
Working Principle of Water Chiller for Cooling Water Equipment with Constant Temperature, Current and Pressure
First, a certain amount of water is injected into the water tank of the machine, and then the water is cooled by the cooling system of the water cooler. Then the low-temperature cooling water is fed into the equipment to be cooled by the water pump. The chiller chilled water takes away the heat, then the temperature rises and returns to the water tank to achieve the cooling effect.
In air-conditioning systems, chilled water is usually distributed to heat exchangers, or coils are cooled in the air-handling units, or other types of terminal equipment in their respective spaces (S-air), and then the cooling water is redistributed back to the cooled. These cooling coils transfer sensible heat and latent heat from air to chilled water, so dehumidifying cooling air flow is usually used. A typical air conditioning unit uses refrigeration capacity rated at 15 to 1500 tons (180,000,18,000,000 British heat units/h or 53 to 5,300 kilowatts). The temperature range of frozen water ranges from 35 to 45 degrees Fahrenheit or from 1.5 to 7 degrees Celsius, depending on the application requirements.
The liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate in the refrigerant recycling system of the water cooler. The temperature difference between the final refrigerant and the water forms. The liquid refrigerant is also completely evaporated into gaseous state and then inhaled and compressed by the compressor. The gaseous refrigerant absorbs heat through the condenser and condenses into liquid. After throttling, the superheated expansion valve becomes a low temperature and low pressure refrigerant and enters the evaporator to complete the refrigerant recycling process.
When shaping products of water chiller, due to the variety of raw materials, the size and shape of the shaping products are different, the clamping force required is also different. Please adjust the clamping force according to the minimum required. In this way, the power consumption can be saved and the service life of the machine can be significantly prolonged.
Industrial water chiller must pay attention to the safety of operation when using the machine. At the beginning of each operation, please check the reliability of the safety device, safety rod and safety door of the machine. During the operation of the machine, remember not to put your hand into the clamping mechanism. When taking products, we must open the safety door, after confirming personnel safety and no foreign body in the mould, we can close the safety door. In addition, in operation, the hand can not reach between the nozzle and the die gate. When repairing the mould, please turn off the oil pump motor.
Screw chiller has the advantages of high efficiency, good performance, low noise, low vibration, energy saving, high reliability and long service life. According to customer's needs and cold tonnage size, single or multi-unit combination is adopted. Compressors can rotate alternately automatically according to load changes, balancing the running time of each compressor, greatly prolonging the service life of chillers. Use industry 1. Selection of the size of special water chiller for injection moulding machine is the need for 25HP water chiller when used for cooling of injection moulds. When used for cooling other equipment, it depends on the specific flow rate of cooling water circulation. 2. The selection of the heat preservation tank and pump of the water cooler sometimes follows the actual situation of the customer's factory. The power requirement of the open water cooler is the same as that of the box water cooler of the same type when the external water pump is connected. 3. The return water temperature of the chiller should not be higher than 40 degrees. The higher the return water temperature, the greater the damage to the compressor.