Economic comparative analysis of cold and heat sources in a hotel in Rizhao

FAN Kexin; SHI Xiaozeng; SUN Yong

doi:10.3969/j.issn.1004-7948.2025.06.003

Abstract：To rationally select the cold and heat source schemes for the air conditioning system of hotel projects,taking a newly-built hotel project in Rizhao as the research object,based on the building functions and target positioning of the hotel,and in combination with the actual situation,three cold and heat source schemes are proposed.Scheme one employs a chiller and a three-loop gas-fired vacuum hot water boiler.Scheme two consists of a single-loop gas-fired vacuum hot water boiler,a conventional air source heat pump unit,and a modular ultra-low temperature air source heat pump unit.Scheme three consists of a municipal heat source,a chiller,and a single-loop gas vacuum hot water boiler.Analyze and compare the three schemes from the aspects of their economic and technical characteristics.The results show that both the initial investment and operating costs of scheme two are relatively high.The operating cost of scheme three is relatively low.In terms of energy-saving,the water chillers in scheme one and scheme three save 51.7%energy compared with those in scheme two.In terms of the refrigeration system,both scheme one and scheme three save 37.75%of the cost compared with scheme two.In terms of the heating system,scheme one and scheme three save 18.78%and 76.21%of the cost respectively compared with scheme two.However,the heat sources for air conditioning and floor heating rely on municipal heat sources.The operating cost of scheme one is higher than that of scheme three,the initial investment is less than that of scheme three,and it is more flexible in operation than scheme three.After comprehensive analysis,it is determined to adopt scheme one.