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...

  Extended use of condensers in   HVAC systems   often leads to the formation of scale deposits in the pipes. If not addressed promptly, these deposits can compromise heat exchange efficiency, resulting in elevated condensation temperatures, reduced cooling capacity, and increased power consumption. Regular scale removal is crucial for maintaining optimal system performance. Methods for Scale Removal and Prevention: Mechanical Descaling Method: Procedure: Evacuate refrigerant from the condenser. Close all valves connected to the refrigeration system. Supply cooling water to the condenser. Use a flexible shaft cleaner with a rotating scraper to gently remove scale deposits. Employ circulating cooling water to cool the scraper and flush removed debris into a collection tank. Considerations: Choose an appropriate scraper diameter for effective yet non-damaging descaling. Conduct the process in multiple passes for thorough scale removal. Chemical Cleaning Method: Procedure: P...

  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 tu...