• 2021-05-18

For a water chiller, there are two reasons for insufficient heat exchange of evaporator: Insufficient water flow of evaporator The main reason for this phenomenon is that the water pump is broken or there is foreign matter in the impeller of the pump, or there is air leakage in the water inlet pipe of the pump (difficult to check and need careful analysis), resulting in insufficient water flow. Tr...

• 2021-03-01

Liquid returns 1. For the refrigeration system using expansion valve, the return fluid is closely related to the selection and improper use of expansion valve.Too large selection of expansion valve, too small overheat setting, improper installation method of temperature sensing package or damage of adiabatic packing, failure of expansion valve may lead to liquid return. 2. For small refrigeration ...

• 2021-02-22

Speaking water chiller energy saving, here we have to mention those places water chiller energy impact. The first is certainly the chiller configuration causes the energy efficiency chiller: Chiller configuration requires reasonable to pay attention to the following aspects need to choose the right compressor chiller such as the American brands such as Copeland compressor, then even if you have co...

• 2021-01-18

There are three ways to prevent and remove shell-tube condenser scale: 1. Mechanical descaling method: mechanical descaling is a method of descaling the condenser of steel cooling tube with a soft shaft pipe washer, especially for vertical shell and tube condenser. The operation method: 1) Extract the refrigerant from the condenser. 2) Close all valves connected with the condenser and the refriger...

• 2020-11-12

The cold storage refrigeration system should be a clean, dry and tight closed circulation system. What if there are mechanical impurities or other contaminants in the system? Here are the impacts on the device: 1. Accelerate the wear of the friction surface, and if it is serious, it may cause the cylinder to damage the machine; 2. Affecting the sealing performance of the valve seat of the suction ...

• 2020-10-28

Impact of refrigerant purity on the Refrigeration equipment system The refrigerant is the blood of the compressor. The purity of the refrigerant is especially important for the cold storage refrigeration equipment. The most obvious phenomenon is: the cold storage filled with high-purity refrigerant, the cooling effect is obvious, the temperature drop is fast, and the cooling capacity is Large; low...

• 2020-07-02

1. What are the causes and treatments for excessive exhaust gas temperature or oil temperature? Answer: (1) The compression ratio is too large; the suction and exhaust pressures are detected, and the pressure ratio is lowered. (2) cooling effect of water-cooled oil coolers; cleaning oil coolers, reducing water temperature or increasing water volume. (3) Insufficient liquid supply of liquid ammonia...

• 2020-06-11

1. High heat transfer coefficient Because different corrugated plates are inverted with each other, a complicated flow path is formed, so that the fluid flows three-dimensionally in the flow path between the corrugated plates, and can be produced at a low Reynolds number (generally Re=50-200). Turbulent flow, so the heat transfer coefficient is high, generally considered to be 3 to 5 times the she...

• 2020-06-01

The thermal expansion valve is one of the four major components in the refrigeration system. It is responsible for reducing the refrigerant from the condensing pressure to the evaporating pressure and proportionally controlling the flow rate of the refrigerant. The quality of the thermal expansion valve in a system will directly affect the operating performance of the entire system, so the selecti...