@article{Zhang2025, 
author = {Jiaxing Zhang and Zhenguo Chen and Ce Zhang and Yu Zhang and Zhipeng Wang and Beiran Hou and Hua Tian and Minxia Li},
title = {Feasibility Analysis of a Wide-Temperature-Zone Heat-Pump Air-Conditioning System},
year = {2025},
journal = {Journal of Refrigeration},
volume = {46},
number = {6},
pages = {65-72},
keywords = {zeotrope, auto-cascade cycle, wide temperature zone, heat pump air conditioning},
url = {https://www.sciopen.com/article/10.12465/j.issn.0253-4339.2025.06.065},
doi = {10.12465/j.issn.0253-4339.2025.06.065},
abstract = {In response to the escalation of global warming, low efficiency of traditional heating methods, and high pollution levels, this study investigated a novel wide-temperature-zone heat-pump air-conditioning system for buildings, which employs an eco-friendly non-eutectic working fluid. It integrates the single-stage vapor compression cycle and the auto-cascade heat-pump cycle, enabling efficient heating and cooling from -20 ℃ to 40 ℃ ambient temperature. The viability of the system was tested in Shenyang and compared with that of a conventional R134a air-conditioning system for cooling and a coal-fired boiler for heating. The thermodynamic evaluation indicated coefficient of performance of 3-5.47 in the cooling mode and 1.81 in the heating mode at -20 ℃. Experimental validation confirmed stable operation across a range of -20 ℃ to 40 ℃, with a heating coefficient of performance of 1.4 at -20 ℃. This research provides theoretical support for the advancement of green building development using wide-temperature-zone heat-pump technology.}
}