Chilled water pump is a chilled water circulation system that plays an important role in large refrigeration equipment. So much the preferred refrigeration manufacturers, then the face of the market a large number of models of frozen pumps, frozen pump users how to choose? This small series for your selection of frozen pumps Raiders. Chilled water pump selection process is the most reference parameter is the head, chilled water pump head practical evaluation method commonly used by closed air conditioning system of cold water resistance, so the chilled water pump selection process should consider the chiller resistance, the pipeline Resistance, pipeline resistance and resistance of the control valve and other resistance factors. A desirable chilled water pump products 1, chiller resistance: provided by the unit manufacturer, usually 60 ~ 100kPa. 2, pipe resistance: including frictional resistance, local resistance, the current design of the cold water pipe than the group should be controlled in the 150 ~ 200Pa / m range, larger diameter, the value may be smaller. 3, the air-conditioning device at the end of the resistance: According to the proposed air into and out of the air-conditioning coil parameters, cooling capacity, temperature difference, etc. by the manufacturer after the coil configuration calculation provided, many rated condition values ​​in the product samples can Checked. This resistance is generally in the range of 20 ~ 50kPa. 4, the control valve resistance: air-conditioned room is always required to control the room temperature, air conditioning through the end of the device installed on the waterway electric two-way valve is to achieve a means of room temperature control. Two-way valve specifications by the valve fully open when the flow capacity and allowable pressure drop to choose. If this allows the pressure drop value is large, the valve control performance is good; if the value is small, poor control performance. The pressure drop at full opening of the valve as a percentage of the total pressure drop across the branch is called the valve power. Water system design requires valve authority S> 0.3, so, two-way valve to allow the pressure drop is generally not less than 40kPa. Based on the above, it is possible to roughly estimate the pressure loss of a high-rise building air-conditioning water system of about 100 m in height, that is, the required head of the circulating water pump. Above is the selection of frozen water pump factors, I hope your understanding and purchase of frozen water pump to provide reference and help. Further reading: Pump and Valve Tube Fittings Exhibition Information 2016 Exhibition Information Industrial Internet (Xiamen) Technology Co., Ltd. Asia Pump Network Editor: Fenfen (QQ / Wechat:) (Service Hotline:)
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