Feasibility study on air conditioning water systems with large specific friction

The purpose of this study is to explore and analyse the technical and economic feasibility of an air conditioning water system with large specific friction. Taking the chilled water system of a high-rise office building in Hangzhou as an example, the design schemes of the conventional specific friction and large specific friction piping systems are compared. Through technical analysis, the hourly head, flow rate and efficiency of the chilled water pump system during the operation period of cooling season are obtained, and then the cooling season operating energy consumption is obtained. Calculation results show that the electricity consumption to transferred cooling quantity ratios of the two schemes meet the specification requirements. In addition, the cooling season operating cost of the chilled water pumps and the cost of the pipeline system are analysed and compared, and the financial net present value (FNPV) analysis proves that the use of large specific friction pipelines can save costs during the life cycle of the system.