@inproceedings{f76575458025489aafb76f18009c459c,
title = "Effect of refrigerant charge and TXV opening on the performance of air-source heat pump water heater",
abstract = "This paper describes the experiment carried out to analyze the effects of improper refrigerant charge and incorrect TXV (Thermal Expansion Valve) opening on the air-source heat pump water heater using R134A. The performance of the system were measured in combinations of four refrigerant charges of 70\%, 85\%, 100\% and 115\% of the optimal value and three TXV opening of 30\%, 45\% and 60\% of full opening at ambient temperature of 20D/15W (dry-bulb temperature/wet-bulb temperature). The results showed that the maximum COP was nearly 33\%, 31.9\% and 4.4\% higher than that of 70\%, 85\% and 115\% of the optimal refrigerant charge at 60\% TXV opening, respectively. And it was found that the increase in TXV opening can enhance COP when water temperature exceeded 30°C.",
keywords = "Heat pump, Refrigerant charge, TXV opening, Water heater",
author = "Wang, \{Zhi Hua\}",
note = "Publisher Copyright: {\textcopyright} 2015 Taylor \& Francis Group, London.; 4th International Conference on Green Building, Materials and Civil Engineering, GBMCE 2014 ; Conference date: 21-08-2014 Through 22-08-2014",
year = "2015",
doi = "10.1201/b17568-137",
language = "英语",
isbn = "9781138026698",
series = "Green Building, Materials and Civil Engineering - Proceedings of the 4th International Conference on GreenBuilding, Materials and Civil Engineering, GBMCE 2014",
publisher = "CRC Press/Balkema",
pages = "657--661",
editor = "Kao, \{Jimmy C.M.\} and Wen-Pei Sung and Ran Chen",
booktitle = "Green Building, Materials and Civil Engineering - Proceedings of the 4th International Conference on GreenBuilding, Materials and Civil Engineering, GBMCE 2014",
}