The authors have presented experimental data on determining the thermodynamic parameters of a ground heat pump operating on Freon R407c on whose basis the exergy of the flow and the exergy loss in structural elements were calculated. A methodological approach to implementing the exergetic method of thermodynamic analysis has been developed on the basis of novel techniques of approximation of piecewise linear functions. An example of calculation of a ground heat pump operating on Freon R407c with account taken of the exergy of flows in it and their exergetic temperature, and also of the coefficient of performance COP of the pump has been given. The developed methodology can be used in designing novel types of low-temperature power plants: refrigerating machines, heat pumps, thermotransformers, and the organic Rankine cycle operating on new refrigerants, also on zeotropic and azeotropic mixtures.
Similar content being viewed by others
References
H. D. Baehr, Thermodynamik, Gottingen-Heidelberg, Berlin, 1962.
J. Szargut and R. Patela, Exergy [Russian translation], Énergiya, Moscow (1968).
T. Bes, Egzergia w procesach ogrewania, klimatyzacji i suszenia, Energetyka Przemyslowa, 11, 388–392 (1962).
V. M. Brodyanskii, Energy loss in modern oxygen systems, Izv. Vyssh. Uchebn. Zaved., Énergetika, No. 7, 87–95 (1959).
V. M. Brodyanskii and I. P. Ishkin, Thermodynamic analysis of irreversible processes in refrigerating plants, Izv. Akad. Nauk SSSR, Tekh. Nauki, No. 5, 40–45 (1958).
D. P. Gokhshtein, Modern Methods of Thermodynamics Analysis of Power Plants [in Russian], Énergiya, Moscow (1969).
I. Kemp, Pinch Analysis and Process Integration — A User Guide on Process Integration for the Effi cient Use of Energy, Elsevier Ltd., Butterworth-Heinemann (2007).
V. M. Brodyanskii, V. Fratsher, and K. Mikhalek, Exergy Method and Its Applications [in Russian], Énergoatomizdat, Moscow (1988).
A. Abdelalim, W. O'Brien, and Z. Shi, Development of Sankey diagrams to visualize real HVAC performance, Energy Build., 149, 282–297 (2017).
M. O. Karaagac, A. Kabul, and H. Ogul, First- and second-law thermodynamic analyses of a combined natural gas cycle power plant: Sankey and Grossman diagrams, Turkish J. Phys., 43, No. 1, 93–108 (2019)
M. H. Yang and R. H. Yeh, Economic performances optimization of the transcritical Rankine cycle systems in geothermal application, Energy Convers. Manage., 95, 20–31 (2015).
N. Javanshir, S. Mahmoudi, and M. Akbari Kordlar, Energy and cost analysis and optimization of a geothermalbased cogeneration cycle using an ammonia–water solution: Thermodynamic and thermoeconomic viewpoints, Sustainability, 12, No. 484, 1–28 (2020).
A. Ahmadzadeh, M. R. Salimpour, and A. Sedaghat, Thermal and exergoeconomic analysis of a novel solar driven combined power and ejector refrigeration (CPER) system, Int. J. Refrig., 83, 143–156 (2017).
A. Crivellari, V. Cozzani, and I. Dincer, Exergetic and exergoeconomic analyses of novel methanol synthesis processes driven by off shore renewable energies, Energy, 187, Article ID 115947 (2019).
A. Abuadala, I. Dincer, and G. F. Naterer, Exergy analysis of hydrogen production from biomass gasifi cation, Int. J. Hydrog. Energy, 35, 4981–4990 (2010).
I. Dincer, C. O. Colpan, and O. Kizilkan, Exergetic, Energetic and Environmental Dimensions, Academic Press, USA (2017).
D. Jung, Y. Lee, B. Park, and K. Byoungha, A study on the performance of multi-stage condensation heat pumps, Int. J. Refrig., 23, 528–539 (2000).
V. Gaigalis, R. Skema, K. Marcinauskas, and I. Korsakiene, A review on heat pumps implementation in Lithuania in compliance with national energy strategy and EU policy, Renew. Sustain. Energy Rev., 53, 841–858 (2016).
S. Wang, Handbook of Air Conditioning and Refrigeration, McGraw-Hill, New York (2000).
G. Yan, T. Bai, and J. Yu, Energy and exergy effi ciency analysis of solar driven ejector–compressor heat pump cycle, Solar Energy, 125, 243–255 (2016).
S. V. Alyukov, Approximation of step functions in problems of mathematical modeling, Math. Models Comput. Simul., 3, Article ID 611, 75–89 (2011).
S. V. Alyukov, Approximation of generalized functions and their derivatives, Atomic Sci. Tech. Ser. Math. Model. Phys. Proc., 2, 5–62 (2013).
A. A. Alabugin, S. V. Aliukov, and K. V. Osintsev, Approximation methods for analysis and formation of mechanisms for regulating heat and mass transfer processes in heat equipment systems, Int. J. Heat Technol., 38, No. 1, 45–58 (2020).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 95, No. 1, pp. 11–21, January–February, 2022.
Rights and permissions
About this article
Cite this article
Osintsev, K.V., Alyukov, S.V. Experimental Investigation into the Exergy Loss of a Ground Heat Pump and its Optimization Based on Approximation of Piecewise Linear Functions. J Eng Phys Thermophy 95, 9–19 (2022). https://doi.org/10.1007/s10891-022-02451-9
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10891-022-02451-9