Energy Optimization for Transcritical CO2 Heat Pump for Combined Heating and Cooling and Thermal Storage Applications

Carolina Madeira Ramos Do Carmo, Morten Blarke, Kazuaki Yazawa, Ali Shakouri

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Abstrakt

A transcritical heat pump (THP) cycle using carbon dioxide (CO2) as the refrigerant is known to feature an excellent coefficient of performance (COP) as a thermodynamic system. Using this feature, we are designing and building a system that combines a water-to-water CO2 heat pump with both hot and cold thermal storages know as Thermal Battery (TB) (Blarke, 2012). Smart and effective use of intermittent renewable energy resources (for example solar and wind power) is obtained supplying water heating (>70 oC) and cooling services (<10 oC) for residential and commercial buildings.
Our fundamental hypothesis is that if electricity generated by intermittent sources is destined for thermal end-uses an efficient conversion of electricity to thermal energy and storage enables a flexible power supply. Thermal storage is more cost-effective than any electro-chemical or mechanical storage technology. The usability and the cost effectiveness are critical for smart grid policies on large-scale integration of intermittent renewables. In this paper, we present an analytic thermodynamic model that predicts the effect of temperature and flow rate of hot and cold water circulation on system COP. The analytical predictions are consistent with the experimental results (Sarkar, 2010).
OriginalsprogEngelsk
TitelProceedings of the 21st International Compressor Engineering Conference
Antal sider9
ForlagPurdue University
Publikationsdato2012
StatusUdgivet - 2012
Begivenhed21st International Compressor Engineering Conference - , USA
Varighed: 16 jul. 201219 jul. 2012

Konference

Konference21st International Compressor Engineering Conference
LandUSA
Periode16/07/201219/07/2012

Bibliografisk note

ID:2116

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  • Citationsformater

    Do Carmo, C. M. R., Blarke, M., Yazawa, K., & Shakouri, A. (2012). Energy Optimization for Transcritical CO2 Heat Pump for Combined Heating and Cooling and Thermal Storage Applications. I Proceedings of the 21st International Compressor Engineering Conference Purdue University. http://www.conftool.com/2012Purdue/sessions.php