H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  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...

  ​It comes to charging refrigerant in   HVAC systems , there are various techniques that be utilized for accurate results. Each method has its advantages and is suitable for different scenarios. In this article, we will explore six charging techniques and their applications. 1. Weighing Method: The weighing method is the most accurate approach, involving the direct addition of the required amount of refrigerant into the system. This technique is particularly suitable when the charging requirements are known, and a full charge is needed. It is commonly used for self-contained units. In the case of smaller charging amounts during system repairs, it is customary to release the refrigerant, perform the necessary repairs, and then add the required quantity. 2.   Current Method: Using the rated current, the current method requires the installation of a clamp ammeter at the input of the air conditioning power supply. To charge the system, connect the refrigerant cylinder to the...