制冷学报2025，Vol.46Issue(2)：38-46,9.DOI:10.12465/j.issn.0253-4339.2025.02.038
一种利用市政热水直接供暖的水氟互联空调系统
A Multi-connected Air Conditioner with Refrigerant and Water Using Hot Water from District Heating System for Direct Heating
摘要
Abstract
In northern China,public buildings commonly use direct-expansion air-conditioning systems for cooling and district heating networks for heating,necessitating separate terminals for each function.This study proposes a multi-connected air conditioning system capable of utilizing refrigerants and water for direct heating with hot water from district heating systems.The system integrates three-fluid heat exchangers within indoor units,enabling seamless switching between direct-expansion air-conditioning and district heating systems.Using an office building in Beijing as a case study,the system was evaluated under summer cooling design conditions,and its heating performance during winter and transitional seasons was analyzed.Results reveal that during winter,the system requires user-side water temperatures below 54 ℃,while in transitional seasons,the direct-expansion mode delivers unit capacities exceeding peak heating demands with energy efficiency surpassing 3.5 over 49％of operating hours.This system simplifies existing configurations by providing a single terminal for year-round heating and cooling,enhancing efficiency and thermal comfort.关键词
水氟互联机/三介质换热器/空调系统/市政热网/供暖Key words
multi-connected air conditioner with refrigerant and water/three-fluid heat exchanger/air conditioning system/district heat-ing system/space heating引用本文复制引用
查富海,王源,李先庭,国德防,顾超..一种利用市政热水直接供暖的水氟互联空调系统[J].制冷学报,2025,46(2):38-46,9.基金项目
国家自然科学基金(52178078)资助项目.(The project was supported by the National Natural Science Foundation of China(No.52178078).) （52178078）
