Autors: Dimchev, I. N., Terziev, A. K., Ivanov, M. P.
Title: Estimation of the Seasonal Coefficient of Performance of Air-to-Water Heat Pumps in Temperate Climate
Keywords: climate zones, Heat pumps, Seasonal coefficient of performance

Abstract: In the last two decades, a significant increase in the share of heat pump systems, used to maintain the microclimate in residential, public and municipal buildings, has been observed. The electrical energy consumed by this type of machines depends on the coefficient of performance, which in turn is a function of the outside air parameters, as well as on the type of technology used. In the presented study, an attempt is made to determine the seasonal coefficient of performance of heat pump systems, considering three machines of different power, to partially or fully cover the thermal load of the object for which they are proposed. Through the use of four different methodologies, the seasonal coefficient of a given heat pump system, designed to operate in each of the nine considered climate zones in moderate climate conditions, is calculated. The analysis shows that when using a simplified methodology for calculating the seasonal coefficient, the specified coefficient according to the manufacturer' s technical passport, without taking into account the conditions of the climatic zone, leads to an error in the seasonal coefficient by 20,6%, which is a significant error when calculating the energy consumption. On average, between 5 and 10% is the error in determining the seasonal coefficient for different climate zones in a moderate climate.

References

  1. A. Saleh, Experimental performance evaluation of water source heat pumps in different circumstances and comparison to air source heat pumps, (2023) Journal of Thermal Engineering, 9 (4), pp. 954 - 967, DOI: 10.18186/thermal.1332182, Yildiz Technical University, ISSN: 21487847.
  2. T. Kropas, G. Streckienė, V. Kirsanovs, M. Dzikevics, Investigation of Heat Pump Efficiency in Baltic States Using TRNSYS Simulation Tool, (2022) Environmental and Climate Technologies, 26 (1), pp. 548 - 560, DOI: 10.2478/rtuect-2022-0042, Sciendo, ISSN: 22558837.
  3. G. Mouzeviris, K. Papakostas, Study on Air-to-Water Heat Pumps Seasonal Performances for Heating in Greece, (2022) Energies, 15 (1), art. no. 279, DOI: 10.3390/en15010279, PUBLISHER: MDPI.
  4. X. Sun, Z. Wang, X. Li, Z. Xu, Q. Yang, Y. Yang, Seasonal heating performance prediction of air-to-water heat pumps based on short-term dynamic monitoring, (2021) Renewable Energy, 180, pp. 829 - 837, DOI: 10.1016/j.renene.2021.08.130, PUBLISHER: Elsevier Ltd, ISSN: 09601481
  5. P. Zlateva, K. Yordanov, Experimental study of heat pump type air-water for heating system performance. 8th International Conference on TE-RE-RD 2019, E3S Web of Conferences, ISSN: 2555-0403, vol. 112, Article number 01007
  6. G. Morrison, T. Anderson, M. Behnia, Seasonal performance rating of heat pump water heaters, (2004) Solar Energy, 76 (1-3), pp. 147 - 152, Cited 115 times., DOI: 10.1016/j.solener.2003.08.007, PUBLISHER: Elsevier Ltd, ISSN: 0038092X
  7. L. Schibuola, Heat pump seasonal performance evaluation: A proposal for a European standard, (2000) Applied Thermal Engineering, 20 (4), pp. 387 - 398, DOI: 10.1016/S1359-4311(99)00041-1, PUBLISHER: Elsevier Science Ltd, ISSN: 13594311
  8. The national methodology for calculating the energy performance of buildings to Regulation No. RD-02-20-3 of November 9, 2022 on the technical requirements for the energy performance of buildings.
  9. EN 15316-4-2:2017 - Energy performance of buildings - Method for calculation of system energy requirements and system efficiencies - Part 4-2: Space heating generation systems, heat pump systems, Module M3-8-2, M8-8-2
  10. EN 14511-2:2022 - Air conditioners, liquid chilling packages and heat pumps for space heating and cooling and process chillers, with electrically driven compressors - Part 2: Test conditions
  11. EN 14825:2022 - Air conditioners, liquid chilling packages and heat pumps, with electrically driven compressors, for space heating and cooling, commercial and process cooling - Testing and rating at part load conditions and calculation of seasonal performance
  12. EN 12831-1:2017 - Energy performance of buildings - Method for calculation of the design heat load - Part 1: Space heating load, Module M3-3
  13. P. Zlateva, K. Yordanov, Comparative analysis of the study of microclimate parameters in wooden houses in North-Eastern Bulgaria. IOP Conference Series: Materials Science and Engineering, ISSN: 1757-8981, vol. 595, Issue 1, Article number 012017
  14. V. Tran, T. Phan, M. Vassilev, An approach for reducing the air conditioning costs in office buildings in Vietnam, (2021) E3S Web of Conferences, 327, art. no. 01012, DOI: 10.1051/e3sconf/202132701012, EDP Sciences, ISSN: 25550403
  15. T. Phan, V. Tran, N. Kaloyanov, M. Vassilev, Heat transfer performance of R1234yf for convective boiling in horizontal micro-fin and smooth tubes, (2020) E3S Web of Conferences, 207, art. no. 01009, DOI: 10.1051/e3sconf/202020701009, EDP Sciences, ISSN: 25550403

Issue

2024 9th International Conference on Energy Efficiency and Agricultural Engineering, EE and AE 2024 - Proceedings, 2024, , https://doi.org/10.1109/EEAE60309.2024.10600630

Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus и Web of Science