H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  Maintaining optimal temperatures in   HVAC chiller system   components is essential for their efficient operation. Abnormal temperature ranges can signal potential issues that need timely analysis and intervention. While precise temperature measurements might be challenging, manual estimation by touch often helps in detecting these anomalies. Here’s an in-depth look at ten critical temperature points for effective chiller maintenance. 1. Discharge Temperature Normal and Abnormal Conditions: • High Discharge Temperature: During summer, the compressor’s discharge temperature is high and untouchable. This may indicate high suction temperatures or excessive condensing temperatures. • Low Discharge Temperature: If the discharge pipe is not hot, it suggests very low suction temperatures or low refrigerant levels, potentially causing valve structure damage or insufficient motor winding cooling. 2. Compressor Shell Temperature Impacts and Causes: • Normal Temperature: The shell...

  Ensuring proper water quality and temperature settings is crucial in the operation and maintenance of HVAC chiller systems. This not only guarantees efficient system performance but also extends the equipment's lifespan and reduces operational costs. This article provides an in-depth look into the standards for water quality and temperature settings in chiller system maintenance. 1.Water Quality Standards 1. 1 Total Hardness • Limit: Total hardness should not exceed 300mg/L. • Definition: Total hardness primarily refers to the concentration of calcium ions (Ca²⁺) and magnesium ions (Mg²⁺) in water. • Impacts of Exceeding the Limit: • Pipe Narrowing: High hardness causes mineral deposits on pipe walls, forming scale, which reduces pipe diameter, increases water resistance, decreases chilled water flow, and impairs cooling efficiency. • Increased Energy Consumption: Scale increases water resistance, requiring the chilled water pump to work harder, thus increasing energy consumption...

  In the process of producing stretch film, the cooling system is very important, which directly affects the quality and output of stretch film. In general, we recommend choosing a chiller model with a cooling capacity slightly larger than the flow rate required for cooling, so as to ensure that the temperature and water flow rate can be kept within the required range under long-term stable operation. When choosing a water chiller system for your stretch film machine and film blowing machine, there are several factors to consider: Cooling Capacity: Determine the cooling capacity required for your machines based on their heat load. Consider factors such as the machine size, material type, production rate, and ambient temperature. Temperature Control: Assess the temperature control requirements of your machines. Depending on the application, you may need precise temperature control to achieve optimal production conditions. Chiller Type: Select a chiller type that suits your specific ...

  Industrial chiller units   play a crucial role in various industries, providing chilled water for processes such as plastics manufacturing, electronics production, and pharmaceuticals. However, like any mechanical system, chillers are prone to common problems that can affect their performance. In this blog post, we will discuss these issues and provide practical solutions to keep your industrial chiller running smoothly. Common Problems and Solutions: 1.Insufficient Refrigerant: One common issue with industrial chiller units is insufficient refrigerant. This can lead to decreased cooling capacity and inefficient operation. The solution is simple: supplement the chiller with an adequate amount of refrigerant and maintain the pressure during operation at around 0.5 MPa. 2.High Outdoor Temperatures: During the summer months, excessively high outdoor temperatures can put stress on the chiller's outdoor unit, leading to elevated condensing pressures and temperatures. To address t...

  The rapid development of petrochemical equipment on marine platforms all over the world, driven by the implementation of the national marine development strategy and the success of projects like the National Offshore Oil Corporation, underscores the importance of   seawater heat exchangers . These devices are crucial for the smooth operation and economic performance of offshore platforms, impacting safety, stability, and long-term production. Material Selection: Choosing the right materials is pivotal in seawater heat exchanger design, affecting production, safety, maintenance, and technological upgrades. Adherence to relevant standards and specifications is essential, considering factors like material mechanical properties, chemical composition, manufacturing processes, and owner requirements. Understanding material selection principles is invaluable for practical applications. Factors Influencing Material Selection: 1. Medium Characteristics: Corrosiveness, temperature, pr...

 What is screw chiller? A  Screw chiller  is an industrial chiller using a semi-hermetic screw type compressor. Including air cooled screw chiller and water cooled screw chiller. Screw chiller models generally range from 30HP to 300HP or even larger. Screw chiller usually use single compressor or double or four compressors. Our Screw chillers mainly use the following brands: Hanbell, Bitzer, or Refcomp. What is scroll chiller ? A scroll chiller is an  industrial chiller  using hermetic scroll type compressor. Also the sroll chillers including air cooled scroll chillers and water cooled scroll chillers. Scroll chiller models usually range from 3HP to 100HP. The Scroll types compressors brands we use are: Copeland, Danfoss, Daikin, Panasonic. Compressors qty optional. Both screw and scroll chillers have their advantages are suitable for different applications. Here are some key differences between the two: Design: A screw chiller uses a rotary screw compressor, wh...

  The  cooling tower , being exposed to outdoor environments for prolonged periods, accumulates a significant amount of sediment and debris due to its powerful fan suction. As time passes, these impurities gradually decrease the cooling tower's heat dissipation efficie ncy, resulting in clogged spray nozzles and increased infiltration of sediment and dirt into the cooling water system, severely impacting the system's refrigeration function. So how to do the regular cleaning of the cooling tower is crucial. Cleaning Treatment Process: 1. Scheme One: Shutdown Cleaning This scheme consists of sterilization and algae-killing cleaning, descaling cleaning, pre-filming, and post-cleaning cleaning stages. The entire cleaning process requires shutdown and takes about 8 days, achieving a descaling rate of over 95%. 1.1 Water Flushing: High-speed flushing (>0.15m/s) effectively removes loose dirt, sediment, detached algae, and corrosion products from the system, while checking for lea...