Building electrical substitution of electromechanical system is an important way to achieve the"Dual-Carbon Goals"(realizing carbon peak before 2030 and carbon neutrality before 2060)in China.Air-source heat pump units are important alternative to electrification for heating in cold zones.In order to solve the technical problems including self-frosting and low-temperature adaptability of air-source heat pump unit in promotion as well as the adaptability between the"supply side"and the"use side",typical project cases are selected to test based on theoretical study.The operation difference of three types of air-source heat pump units including the"open energy tower","closed energy tower"and modular units are analyzed through data statistics,as well as under different outdoor ambient temperature,air humidity,water supply temperature and other conditions;existing problems are expounded with solutions;application proposals are provided for different types of air-source heat pump units.It is expected to provide practical operation data reference for the application of air-source heat pump unit in winter heating of zero-carbon buildings and near-zero-carbon buildings in cold zones.
building electrificationair-source energy towerair-source heat pumpcold zonesheatingproject case