International Scientific Journal


The use of air-source heat pumps (ASHP) is increasing to meet the energy needs of residential buildings, and manufacturers of equipment have permanently expanded the range of work and improved the efficiency in very adverse outdoor air conditions. However, in the time of a wide range of different technologies, the problem of using ASHP, from a techno-economic point of view, is constantly present. Exergetic efficiency and exergoeconomic cost no longer provide sufficiently reliable information when it is necessary to reduce the investment costs or in-crease the energy/exergetic efficiency of the component/system. This paper presents comparison of ASHP in different operational conditions based on an advanced exergy and exergoeconomic approach. The advanced exergy analysis splits the destruction of exergy for each individual component into avoidable and unavoidable part in order to fully understand the processes. The information of stream costs is used to calculate exergoeconomic variables associated with each system component. Irreversibility in the compressor have the greatest impact on reducing the overall system exergetic efficiency by 46.7% during underfloor heating (UFH) operation and 24.53% during domestic hot water (DHW) operation. Exergy loss reduces exergetic efficiency by 5.72% UFH and 39.74% DHW. High values of exergoeconomic cost for both operating regimes are present in flows 1, 2, 3 and 4 due to high costs of production and relatively small exergy levels. The general recommendation is to set the ASHP to operate with near-optimal capacities in both regimes and then reduce exergy of flows 1, 2, 5, 11, and 13.
PAPER REVISED: 2020-07-14
PAPER ACCEPTED: 2020-08-07
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 3, PAGES [1849 - 1866]
  1. Moran, M., Shapiro, H., Fundamentals of Engineering Thermodynamics, John Wiley & Sons Ltd., West Sussex, UK, 2006
  2. ***,
  3. ***,
  4. Morosuk, T., Tsatsaronis, G., Advanced Exergetic Evaluation of Refrigeration Machines Using Different Working Fluids, Energy, 34 (2009), 12, pp. 2248-2258
  5. Dong, X., et al., Energy and Exergy Analysis of Solar Integrated Air Source Heat Pump for Radiant Floor Heating Without Water, Energy and Buildings, 142 (2017), May, pp. 128-138
  6. Zhang, R., et al., A Novel Variable Refrigerant Flow (VRF) Heat Recovery System Model: Development and Validation, Energy and Buildings, 168 (2018), June, pp. 399-412
  7. Qui, J., et al., Experimental Investigation of L-41b as Replacement for R410A in a Residential Air- Source Heat Pump Water Heater, Energy and Buildings, 199 (2019), Sept., pp. 190-196
  8. Xu, S., et al., Experimental Study on R1234yf Heat Pump at Low Ambient Temperature Comparison with Other Refrigerants, Thermal Science, 23 (2019), 6B, pp. 3877-3886
  9. Xu, W., et al., Feasibility and Performance Study on Hybrid Air Source Heat Pump System for Ultra-Low Energy Building in Severe Cold Region of China, Renewable Energy, 146 (2020), Feb., pp. 2124-2133
  10. Ahamed, U. J., et al., A Review on Exergy Analysis of Vapor Compression Refrigeration System, Renewable and Sustainable Energy Reviews, 15 (2011), 3, pp. 1593-1600
  11. Alshehri, F., et al., Techno-Economic Analysis of Ground and Air Source Heat Pumps in Hot Dry Climates, Journal of Building Engineering, 26 (2019), Nov., 100825
  12. Wang, D., et al., Energy and Exergy Analysis of an Air-Source Heat Pump Water Heater System Using CO2/R170 Mixture as an Azeotropy Refrigerant for Sustainable Development, International Journal of Refrigeration, 106 (2019), Oct., pp. 628-638
  13. Byme, P., Ghoubali, R., Exergy Analysis of Heat Pumps for Simultaneous Heating and Cooling, Applied Thermal Engineering, 149 (2019), Feb., pp. 414-424
  14. Su, W., et al., Performance Investigation on a Frost-Free Air Source Heat Pump System Employing Liquid Desiccant Dehumidification and Compressor-Assisted Regeneration Based on Exergy and Exergoeconomic Analysis, Energy Conversion and Management, 183 (2019), Mar., pp. 167-181
  15. ***,
  16. Bejan, A., et al., Thermal Design and Optimization, John Wiley & Sons, Inc., New York, USA, 1996
  17. Cuhla, O., et al., Heat Exchanger Applications in Wastewater Source Heat Pumps for Buildings: A Key Review, Energy and Buildings, 104 (2015), Oct., pp. 215-232
  18. Mergenthaler, P., et al., Application of Exergoeconomic, Exergoenvironmental, and Advanced Exergy Analysis to Carbon Black Production, Energy, 137 (2017), Oct., pp. 898-907
  19. Ebrahimi, M., et al., Conventional and Advanced Exergy Analysis of a Grid Connected Underwater Compressed Air Energy Storage Facility, Applied Energy, 242 (2019), May, pp 1198-1208
  20. Kelly, S., Energy System Improvement Based on Endogenous and Exogenous Exergy Destruction, Ph. D. thesis, TU Berlin, Berlin, Germany, 2008
  21. ***,
  22. Bulatović, J., Statistical Processing of Measurement Results (in Serbian), Edvard Kardelj, Niš, Serbia, 1982
  23. ***,
  24. Nyers, A., et al., Dynamic Behavior of a Heat Pump Coaxial Evaporator Considering the Phase Border`S Impact on Convergence, Facta Universitatis, Series: Mechanical Engineering, 16 (2018), 2, pp. 249-259

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence