H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  Generally speaking, everyone will have doubts when purchasing a   chiller . I don't know how to judge the chilled water flow of the chiller? From what aspects should the water flow of the chiller be considered? Today I would like to share with you four suggestions: 1. Detection of return water temperature and outlet water temperature of the chiller (the unit needs to be in normal state): 30 minutes after starting up the unit, you can read the temperature of the inlet and outlet water when the unit is running through the parameters of the unit's control system or the inlet and outlet water thermometers of the unit's chilled water system. The difference should be ensured to be about 4-6 degrees. If the water temperature difference is too large, it means that the water flow of the water system through the plate type device is too small, which may cause the unit to fail to operate normally or be damaged. 2. Water pressure detection of the inlet and outlet pipes of the  chille

  Industrial Chillers   are widely used, providing cooling water systems for industrial production and helping companies improve product output and quality. Therefore, we need to understand how to use chillers simply and correctly to avoid problems during use and delay production. Let us briefly understand the use of chillers from the following aspects. One: the protection of the chiller: 1. Check whether the voltage is normal, lack of phase, 2. Check and record the running current. 3. Measure and record whether the high and low pressure and temperature control temperature are normal. 4. Under normal conditions, the high pressure is 1.5MPa / the low pressure is 0.45MPa4 Check whether the interlocking control circuit device is loose and aging. 5. Check whether the oil level and oil temperature are normal. 6. Check the compressor for abnormal sound and abnormal vibration. 7. Refrigerant system test. 8. Overall commissioning and testing. 9. Regularly check whether the quality of the chill

  It’s common acknowledged that chemical factory is quite easy cause explosion if all the electrical products don’t handle well. Today we are going to share one of the cooling project with explosion proof chiller system to help you understand How to design a best   explosion proof industrial chiller   for Chemical factories. Project Overview This project is an industrial cooling project of Chemical Co., Ltd. The content of the project includes: 1. Pure water system: The dosage is 15T/day, and it needs to be reduced from 25°C to 4°C within 8H; 2. Chilled water system: water flow rate is 100m3/h, inlet water temperature is 12°C, outlet water temperature is 4°C; 3. Cooling water system: the water flow rate is 370m3/h, and the temperature difference between inlet and outlet water is 5℃. The explosion-proof grade of all electrical equipment is required to reach ExdIIBT4. Equipment configuration instructions 1. The cold source of the pure water system uses a model 20STB-25AD4 air cooled low

  Sand mill, also known as laboratory bead mill, or nano sand mill, is mainly used for wet grinding of chemical liquid products. It is mainly composed of body, grinding cylinder, sand grinding disc (lever), grinding medium, motor and feeding pump. The speed of feeding is controlled by the feeding pump. The grinding media of this equipment are generally divided into zirconia beads, glass beads, zirconium silicate beads, etc.   Since the sand mill (bead mill) is working, the material and the grinding medium will have strong collision and friction, which will generate a lot of heat energy, and the grinding inside of the sand mill should generally not exceed 65 degrees. The machine protection temperature will cause the temperature switch to act, and the sand mill will automatically stop for protection, thus affecting the production efficiency. Inversely, if the internal temperature of the grinding is too low, the viscosity of the grinding slurry will be too high, the action motor cannot be

  The compressor is the heart of the   chiller , and the normal operation of the compressor is the basis for the normal operation of the chiller. Therefore, if we want to understand the chiller, we must first understand the compressor. Today we will talk about the reasons for the internal protection of the semi-hermetic screw compressor. There is a thermal switch inside the screw compressor. The function of this switch is to disconnect the power supply circuit to the motor of the compressor when the temperature of the compressor exceeds the set value, and the compressor can not be turned on until the compressor is cooled down. And compressor Work. This is the internal protection of the compressor. Today we will talk about the reasons and solutions for this situation. 1.The refrigeration system is short of refrigerant. When the refrigerant is insufficient, the refrigerant returning to the compressor will be overheated, causing the compressor to heat up as a whole, causing the thermal sw

  First of all we need to understand what is meaning by "carbon dioxide " here. Generally speaking, carbon  dioxide emissions refer to the emissions of greenhouse gases such as carbon dioxide and methane. Carbon reduction action is to reduce greenhouse gas emissions, thereby reducing the greenhouse effect. If too much greenhouse gas emissions cause the earth's average temperature to be too high, it will lead to global climate anomalies. The most direct result is the melting of glaciers in the Arctic and Antarctic, rising sea levels, submersion of land and coastal cities, and complete disappearance of most islands. Natural disasters that are sensitive to temperature changes, such as typhoons, extreme weather, and forest fires, will increase substantially. However, while we are carrying out reducing carbon emssion ,we still need confort cooling air in hot seasons. How we deisgn the system to make it greener ? Below is one of the project we have designed with  a high efficie

  We all know that according to different heat dissipation methods, chillers can be divided into air-cooled chillers and water-cooled chillers. What is the difference between air-cooled chillers and water-cooled chillers? ​ 1. The  air-cooled chiller  uses copper tubes and aluminum fins to dissipate heat from the condenser. A fan is required to blow the outdoor air through the heat exchange fins and take away the heat of the condenser, so the air-cooled chiller does not need to be connected to the cooling tower. But compared with water-cooled chillers, under the same power, air-cooled chillers have larger equipment size and higher noise. The condenser of water-cooled chillers exchanges heat with the cooling water from the cooling tower through the heat exchanger. The excess waste heat will be transported to the cooling tower through the cooling water loop and released into the atmosphere, or enter the water-water heat exchanger or soil heat exchange coil for storage. Therefore, water-c