H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  Ice storage technology is a key energy-saving solution for modern buildings. By making ice during off-peak night hours (using lower electricity rates) and melting it for cooling during peak daytime, it significantly reduces air-conditioning operating costs. A critical component in this system? The   U-shaped stainless steel heat exchanger tubes   inside the storage tank—their design directly impacts efficiency, stability, and lifespan. Let’s break down this essential technology. How Ice Storage Units Work & the Tank’s Role An ice storage system consists of a refrigeration unit, ice storage tank, heat exchanger, and control system. Its core processes: • Nighttime ice-making: During low electricity demand, the refrigeration unit cools water or glycol in the tank below freezing, forming ice on the outer surface of heat exchanger tubes to store cold energy. • Daytime ice-melting for cooling: When demand peaks, hot return water is pumped into the tank. It exchanges heat ...

  Screw water-cooled chillers   typically operate around 3,000 hours per year, depending on China's climate and geographical conditions. Regular and scientific maintenance is crucial to ensure long-term, reliable operation, extend the lifespan, and reduce operating costs. Maintenance and Upkeep Preventive maintenance during operation and inspection involves creating annual and monthly maintenance plans based on actual operating conditions. Shutdown Procedures In winter, clean and dry the unit. Open the drain valve to empty the  shell-and-tube heat exchanger  to avoid freezing. The shutdown sequence is: chiller off - cooling tower fan off - cooling water pump off - chilled water pump off. Special attention to anti-freezing: 1. Drain the evaporator and condenser if the unit is outdoors below 0°C during standby. 2. Interlock the water flow switch with the unit to prevent freezing when the chilled water flow switch malfunctions. 3. Ensure water in the evaporator is flowi...