Practice of Variable Flow Adjustment for a Fixed Frequency Air Source Heat Pump Air Conditioning System in a Hotel
By adjusting the cold(hot)source and terminal dual variable flow primary pump system of a fixed frequency air source heat pump air conditioning system in a hotel in Wuhan,the minimum flow characteristics of fixed frequency air source heat pump refrigeration were analyzed,and the water pressure difference between the supply and return pipes at the terminal was calculated and tested.The frequency characteristics of the variable frequency water pump were analyzed,and a control strategy for the dual variable flow system of air source heat pump and terminal users was formulated,The system water flow rate is divided into 5 gears according to the number of heat pumps to meet the minimum flow rate of the heat pump.The chilled water temperature is controlled between 6-15℃,the indoor temperature is 24-27℃,and the relative humidity is 45-65%.Under comfortable conditions,compared with traditional cold source constant flow and end variable flow operation,the water pump saves 57.5%of energy and the heat pump saves 6%of electricity.
hotel air conditioning systemcold and heat source variable flow primary pump systemcold(hot)source flow rate gear adjustment
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