The chiller is a kind of refrigeration equipment that can provide industrial chilled water to various industries to achieve the purpose of cooling. According to different heat dissipation methods, it can be divided into air-cooled chiller and water-cooled chiller, which can control the temperature at 5-35 degrees. Between, and the low temperature chiller can control the temperature between 0 and -40 degrees. When selecting the chiller, we need to know exactly how much the chiller's inlet temperature, the temperature of the effluent, the flow rate, the size of the water tank, etc., and the working environment of the chiller, such as the ambient temperature and the seasonal variation of the ambient temperature. , environmental space, etc.
A high-quality and low-cost chiller is a guarantee of successful engineering design and has a long-term impact on the operation of the system:
1. Cooling water flow rate: refers to the cooling circulating water flow of the chiller to be supplied when the refrigeration equipment is used.
2, cooling capacity: that is, how much cooling capacity is needed, the more commonly used cooling capacity units are Kcal/h, kw, etc.
3, the water temperature: return water temperature or return water temperature difference requirements: the water temperature refers to the required chilled water temperature, the return water temperature refers to the cooling water temperature, some equipment with strict heat dissipation requirements will have cooling water supply temperature requirements.
4, the water pressure: some need heat dissipation equipment due to the complex internal heat dissipation structure of the equipment, there is a certain pressure requirement for the cooling water supply, then it is necessary to consider whether the rated water pressure of the chiller can meet this requirement.
5, the lift of the pump: If it is a one-on-one use of the single machine, the pump lift should not be a problem. If multiple water-cooled chillers are connected in parallel for multiple applications requiring cooling equipment, the resistance of the piping system should be considered to estimate the pump that needs to be configured with a large head.
6, control adjustment requirements: generally refers to pressure control adjustment and temperature control adjustment.
7, chiller safety protection function requirements: A. compressor delay start protector B. high and low voltage protection function C. reverse (lack) phase protection D. compressor overload protection E. anti-freeze protection F. compressor overheat protection G The compressor frequently starts the protector and abnormal indicator light and various protection switches.