Advanced Exergetic Analysis of a Heat Pump Providing Space Heating Taking Into Account Seasonal Variations of Operation Modes

Volodymyr Voloshchuk

Анотація


In contrast to conventional exergy-based methods, advanced exergetic analyses can evaluate exergy destructions due to interactions among components of the energy-conversion system and the real potential for improving system components. Application of a detailed advanced exergetic analysis on a wastewater source heat pump providing space heating in variable operation modes is proposed in the work. In order to determine thermodynamic parameters of the refrigeration vapor compresion cycle a special simulation model was used. The so-called thermodynamic-cycle-based approach was applied to split the exergy destruction within each component of a heat pump into unavoidable, avoidable, endogenous and exogenous parts. It is shown that in the investigated system only about 50 % of the total seasonal destructions in components of the heat pump can be avoided. About 40 % of this avoidable thermodynamic inefficiency is caused by interactions among components. According to the results received, in order to improve the thermodynamic performance of the analyzed heat pump the evaporator should be improved first and the condenser second. The compressor has very low potential for the heat pump improvement and the throttling valve has no potential for this purpose. Based on the applied advanced exergetic analysis it is possible to receive more precise and useful information for better understanding and improving the design and operation of the analysed heat pump.

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Tsatsaronis, G. and Morosuk, T. (2016), "Advanced exergy-based methods used to understand and improve energy-conversion systems", The 4th International Conference on Contemporary Problems of Thermal Engineering (CPOTE-2016), Gliwice – Katowice, Silesia, Poland, September, 14-16, 2016, Gliwice – Katowice, Silesia, pp. 75–89, ISSN 978-83-61506-36-2.

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Пристатейна бібліографія ГОСТ


1    Tsatsaronis, G. Advanced exergy-based methods used to understand and improve energy-conversion systems / G. Tsatsaronis, T. Morosuk // The 4th International Conference on Contemporary Problems of Thermal Engineering (CPOTE-2016). Program and Proceedings, Gliwice – Katowice, Silesia, Poland, September, 14–16, 2016. – Gliwice – Katowice, Silesia, 2016. – P. 75–89. – ISSN 978-83-61506-36-2.

 

2    Morosuk T. New approach to the exergy analysis of absorption refrigeration machines / T. Morosuk, G. Tsatsaronis // Energy. – 2008. – Vol. 33. – P. 890–907.

 

3    Morosuk, T. Advanced exergetic evaluation of refrigeration machines using different working fluids / T. Morosuk, G. Tsatsaronis // Energy. – 2009. – Vol. 34. – P. 2248–2258.

 

4    Erbay, Z. Application of conventional and advanced exergy analyses to evaluate the performance of a ground-source heat pump (GSHP) dryer used in food drying / Z. Erbay, A. Hepbasli // Energy Conversion and Management. – 2014. – Vol. 78. – P. 499–507. – ISSN 0196-8904. – doi: 10.1016/j.enconman.2013.11.009.

 

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7   Herbas, T. B Steady-state simulation of vapor-compression heat pump / T. B. Herbas, E. C. Berlinck, C. A. T. Uriu, R. P. Marques, J. A. R. Parise // International Journal of Energy Research. – 1993. – Vol. 17. – P. 801–816.




DOI: https://doi.org/10.20998/2078-774X.2017.10.08

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