H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  The four major components of the refrigeration system are compressor, evaporator, condenser and throttling device. The role of the condenser in the refrigeration system is mainly to cool and liquefy the gaseous refrigerant in the high temperature and high pressure state discharged from the compressor, so as to meet the requirements of the circulating use of the refrigerant in the system. The selection of the temperature difference between the condensing temperature and the coolant inlet and outlet involves economic issues in the refrigeration system. Increasing the condensation temperature and reducing the temperature difference between the coolant inlet and outlet can increase the heat transfer temperature difference, reduce the required heat transfer area, and reduce the investment cost of heat exchange equipment. However, lowering the condensing temperature can reduce the power consumption of the refrigeration compressor. The greater the temperature difference between the coolant

  Air-cooled chillers , as a kind of more efficient refrigeration equipment in chiller products, are widely used in the domestic industrial market and become necessary equipment for many industrial production. ​ At the same time, although the air-cooled chiller is equipped with multiple protection devices, these are all to prevent the failure from directly damaging the unit. If the company wants to ensure that the air-cooled chiller has high cooling efficiency and long service life, it must remember to do regular maintenance. So, how should the normal safety maintenance and testing of air-cooled chillers be carried out? 1) Check the stability of voltage and current When the air-cooled chiller works normally, the voltage is 380V (the voltage of DYJ-01A～DYJ-02A is 220V, and the voltage of other regions abroad also has 410V, etc.), and the current is normal within the range of 11A-15A; 2) Check the compressor regularly The compressor is the "heart" of the chiller, and its qualit

  It is understood that the   magnetic bearing chiller   is a new type of centrifuge equipment appearing in the international market. Compare to screw chillerIts main characteristics are fast speed, low noise, energy saving, intelligent management, in line with the trend of green development, and the magnetic levitation technology is in the world's leading level. Magnetic levitation  compressor . bearing sensors detect bearings 6 million times per minute . make sure that the maximum offset of the shaft does not exceed 7 microns Automatic control software can compensate vibration error automatically . bearings up to 48000 rpm, smaller size Only 2a-4a starting current has no impact on the power grid Centrifugal compressor, magnetic bearing without lubricating oil, variable frequency drive, integrated digital control. Magnetic compressor 9 characteristics 1.The unit controls the water temperature to an accuracy of ±0.1 °C, and the general unit temperature is ±1 °C. It can realize the

  In general, tube heat exchanger in hot water unit has long life span.   Shell and tube heat exchanger structure: The shell and tube heat exchanger is composed of shell, heat transfer tube bundle, tube sheet, baffle plate (baffle plate), and tube box. The shell is mostly cylindrical with a tube bundle inside, and both ends of the tube bundle are fixed on the tube plate. There are two types of heat transfer: hot fluid and cold fluid, one is the fluid inside the tube, called the tube side fluid; the other is the fluid outside the tube, called the shell side fluid. In order to improve the heat transfer coefficient of the fluid outside the tube, a number of baffles are usually arranged in the tube shell. The baffle can increase the velocity of the fluid in the shell side, make the fluid pass through the tube bundle multiple times at a specified distance, and improve the turbulence of the fluid. The heat exchange tubes can be arranged in an equilateral triangle or square on the tube plate.

  Since  H.Stars Grou p  has been established for more than 28 years so far, some of you might wonder how H.Stars produces a high quality  water cooled chiller . Below is the detailed production process with strict quality control system and 100% testing before delivery. ​ 1. Chiller Frame welding: clean the bracket and select the appropriate welding method according to the specifications of the welding materials and the technical requirements. 2. Chiller Bracket assembly: compressor, electric box, filter and other brackets are assembled and welded according to the required sizes from the drawing. 3.Shell and tube evaporator and condenser assembling process: the evaporator and condenser ,self-manufactured by UAR ,the subsidiary of H.Stars Group, is in welding process according to buyer’s requirements and H.Stars  R&D team design. 4.Sheet metal: the electric control box shell on the H.Stars chiller is designed and manufactured independently, and the quality is under the control of t

  Carbon steel and low-alloy steel heat exchangers (design temperature lower than -20℃), austenitic stainless steel heat exchangers (design temperature lower than -196℃) are low temperature heat exchangers, and the structural design should follow the following in principle. Material selection of  low temperature heat exchanger : 1. Use temperature of plastic materials Polyvinyl chloride (PVC) -15℃~+80℃, polypropylene (PP) -30℃~+140℃, polyurethane (PU) -70℃~+80℃, polyethylene (PE)-100℃~+100 ℃. Plastics tend to be brittle in low temperature environments. 2. Operating temperature of carbon steel and low alloy steel Q345R steel plate can be used at -60℃~-40℃ under low temperature and low stress conditions, and 16MnDR steel plate for low temperature can be used at -80℃~-70℃ under low temperature and low stress conditions. Q235B steel plate cannot be used in low temperature heat exchangers. 3. Operating temperature of high alloy steel (stainless steel) 1. The lower limit of the operating tem

  Peanut storage conditions have significant effects on overall quality. With   H.Stars   standards for roof pitch, ventilation and other building standards, farmer stock peanut warehouses or cold room are the best solution. Here are some suggestions on one of the type peanut cold storage. Description of Peanut Cold Storage 1. Project details: The specific parameters of the Peanut Cold Storage are as follows: a. Cold storage size: 30m (length) × 25m (width) × 4.5m (height) b. Cold storage temperature: 10 ℃ c. Cold storage goods: peanuts without shell d: Storage capacity of cold storage: 1000Ton 2. After calculation, the chiller capacity of the cold storage is: 150kw 3. Refrigeration system description (1). This project adopts:  efficient refrigeration chilled water system . a. The main refrigeration equipment of the high-efficiency chilled liquid refrigeration system is the water cooled chiller unit. After commissioning and testing in the factory, the whole chilled can be shipped to cu