Journal ArticleDOI
Experimental results of transcritical CO2 heat pump for residential application
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TLDR
In this paper, the authors compared a commercially available R410A heat pump and a prototype R744 (carbon dioxide) system in heating mode, which utilizes aluminum microchannel heat exchangers and a semi-hermetic compressor.About:
This article is published in Energy.The article was published on 2003-08-01. It has received 76 citations till now. The article focuses on the topics: Heat pump & Transcritical cycle.read more
Citations
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Journal ArticleDOI
Fundamental process and system design issues in CO2 vapor compression systems
TL;DR: In this article, the authors present recent developments and state-of-the-art for transcritical CO2 cycle technology in various refrigeration, air-conditioning and heat pump applications, including discussion of properties and characteristics of CO2, cycle fundamentals, methods of high-side pressure control, thermodynamic losses, cycle modifications, component/system design, safety factors, and promising application areas.
Journal ArticleDOI
Towards an intermittency-friendly energy system: Comparing electric boilers and heat pumps in distributed cogeneration
TL;DR: In this paper, a high pressure compression heat pump using low-temperature heat recovered from flue gasses in combination with an intermediate cold storage is proposed to improve the intermittency-friendliness of distributed cogeneration.
Journal ArticleDOI
Transcritical carbon dioxide heat pump systems: A review
Brian T. Austin,K. Sumathy +1 more
TL;DR: An overview of transcritical carbon dioxide heat pump systems can be found in this paper, where the authors present a review of research on transcritical CO2 heat pump system components, configurations and modifications and how these factors affect overall system performance.
Journal ArticleDOI
Review of energy efficiency and system performance of residential heat pump water heaters
H. Willem,Y. Lin,Alex Lekov +2 more
TL;DR: In this paper, the authors provide a comprehensive and in-depth review of heat pump water heater research on system energy efficiency and performance topics, focusing on laboratory and field experiments and measurements, modeling of energy use and efficiency, technological modifications or upgrades, and control operation strategies.
Journal ArticleDOI
Experimental investigation of the optimal heat rejection pressure for a transcritical CO2 heat pump water heater
TL;DR: In this paper, an experimental investigation of the optimal heat rejection pressure for a transcritical CO 2 heat pump water heater is presented, and it is found that the optimal PSR varies with gas-cooler outlet refrigeration temperature at different ambient temperatures.
References
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Journal ArticleDOI
A new, efficient and environmentally benign system for car air-conditioning
TL;DR: In this paper, the authors considered that the use of the old refrigerant carbon dioxide offers a key to the complete solution of the environmental problems in many areas of refrigeration usage, both from an environmental and practical point of view.
Proceedings ArticleDOI
The role of suction line heat exchanger in transcritical R744 Mobile A/C systems
Experimental and model comparison of transcritical CO2 versus R134a and R410 system performance. Discussion
J. Yin,Y. C. Park,D. E. Boewe,R.P. McEnaney,A.C. Beaver,C. W. Bullard,P. S. Hrnjak,M. Goldschmidt,P. A. Domanski,D. Zeitlow,H. Gentner,J. Wertenbach +11 more
TL;DR: In this article, the authors compare the performance of systemes transcritiques au CO 2 and de systemes utilisant respectivement du R134a and du R410A, dans des conditionneurs d'air de voiture and des pompes a chaleur domestiques.
Results and experiences with the first commercial pilot plant CO2 heat pump water heater
TL;DR: In this article, a pompe a chaleur au CO 2 was installed in a chauffe-eau-chaleur system in Norway with a temperature of 70-80°C.