Summary
In this paper, the analysis model of thermal performance and available energy of two-stage cascade cycle heat pump water heater (HPWH) was established. For the first time, the equivalent transformation thermodynamic analysis method and available energy consumption equation were employed to carry out the theoretical analyses of thermal performance and available energy consumption for two-stage cascade cycle HPWH. And the correctness of the analysis approach proposed in this paper was verified by an example. The calculation results showed a significant agreement with the results derived by the first law of thermodynamics and energy conservation law. The available energy analysis of two-stage cascade cycle HPWH clearly revealed the available energy consumption rates for different working processes, including heat transfers of heat exchangers, flow of heat-carrying fluid, working medium cycle, output of hot water, etc. This approach could be conveniently used in the analyses of thermal performance and available energy consumption for actual complex thermal system with irreversible process. This paper provided the theoretical basis for the actual optimization design and operation analysis of cascade type heat pump systems, and furthermore, the results of the calculation instance would also have a certain reference value.
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Details
- Original title: Preliminary theoretical analyses of thermal performance and available energy consumption of two-stage cascade cycle heat pump water heater.
- Record ID : 30022317
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 82
- Publication date: 2017/10
- DOI: http://dx.doi.org/10.1016/j.ijrefrig.2017.06.016
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Indexing
- Themes: Heat pumps techniques
- Keywords: Water heater; Two-stage system; Heat pump; Performance; Cascade system; Modelling; Cycle
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Development of high performance heat pump syste...
- Author(s) : HASEGAWA H., SAIKAWA M., HASHIMOTO K., IWATSUBO T.
- Date : 1996/09/22
- Languages : English
- Source: Heat pumping technologies towards the next century: applications and markets. Proceedings of the 5th IEA Conference.
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Experimental investigation on the two-stage com...
- Author(s) : LIU F., TAN J., XIONG J.
- Date : 2010/07/12
- Languages : English
- Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Difference analysis on optimal high pressure of...
- Author(s) : LIANG X. Y., HE Y. J., CHENG J. H., et al.
- Date : 2019/10
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 106
- Formats : PDF
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Development and validation of quasi-steady-stat...
- Author(s) : SHEN B., NAWAZ K., BAXTER V., et al.
- Date : 2018/03
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 87
- Formats : PDF
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Real-time energy-efficient operation of a dedic...
- Author(s) : CUI C., REN J., RAMPAZZO M., SONG Y., YIN X., CAO F.
- Date : 2022/12
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 144
- Formats : PDF
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