THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

DETERMINATION OF COP MAXIMUM OF COLD WATER LOOP OF HEAT PUMP HEATING SYSTEM BY MEANS OF NUMERICAL-GRAPHICAL OPTIMIZATION PROCEDURE

ABSTRACT
The paper presents the energy optimization of the cold water loop of the heat pump heating system using analytical-numerical procedure. The aim of the study is obtain the maximum COP of the heating system by optimum of the wall water mass-flow rate and well pump power. The objective function is the heating system’s COP. All components of the heating system: evaporator, condenser, compressor, circulation pump, and well pump are described by steady-state, lumped mathematical model. The model’s equations are coupled, non-linear, multivariable and algebraic, the solution is feasible using an iterative numerical method. The MATLAB’s program with Gauss elimination and Newton-linearization method is applied for solving the model. The obtained numerical data are presented in 3-D graphics. The optimum value of the cold-well water mass-flow rate is obtained from the graphics or by using a selection algorithm. The results of the study are the adequate mathematical model for energy optimization of the heating system, the numerical algorithm for solving the model and the ultimate goal to obtain the optimum of the power of well pump and compressor.
KEYWORDS
PAPER SUBMITTED: 2020-01-31
PAPER REVISED: 2020-02-15
PAPER ACCEPTED: 2020-02-25
PUBLISHED ONLINE: 2020-03-08
DOI REFERENCE: https://doi.org/10.2298/TSCI200131104P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 6, PAGES [4257 - 4267]
REFERENCES
  1. Raiyan, M. F; Ahamed J. U.; Rahman M. M. and Salam M. A., Performance and exergetic investigation of a domestic split air conditioner using blends of R22 and R290. International Journal of Automotive and Mechanical Engineering ISSN: 2229-8649 (Print); ISSN: 2180-1606 (Online); Volume 14, Issue 2 pp. 4125-4139 June 2017 ©Universiti Malaysia Pahang Publishing doi.org/10.15282/ijame.14.2.2017.2.0331.
  2. Sun, W.; Hu, P.; Lei, F.; Zhu, N., Jiang, Z., Case study of performance evaluation of ground source heat pump system based on ANN and ANFIS models. Applied Thermal Engineering 87 (2015), pp. 586-594. dx.doi.org/10.1016/j.applt3hermaleng.2015.04.082.
  3. Amoabeng, K. O.; Choi, J. M., A study on the performance of a newly designed heat pump calorimeter. Applied Thermal Engineering 123 (2017), pp. 216-225. dx.doi.org/10.1016/j.applthermaleng.2017.05.029.
  4. Tu K., Wu Q., Sun H., A mathematical model and thermal performance analysis of single wellcirculation (SWC) coupled ground source heat pump (GSHP) systems, Applied Thermal Engineering (2018). doi.org/10.1016/j.applthermaleng.2018.09.029
  5. Kassai, M., Investigation of the thermal behavior and energy consumption of refrigeration systems, Thermal science 2020 Paper online first, pp.- (2020), doi.org/10.2298/TSCI190213170K,
  6. Kassai, M., Development and experimental validation of a TRNSYS model for energy design of air-to-water heat pump system, Thermal science, online first, pp.70-70, (2019) doi.org/10.2298/TSCI181206070K.
  7. Nyers, A., Pek, Z., Nyers, J.; Dynamical behavior of a heat pump coaxial evaporator considering the phase border's impact on convergence, Facta Universitatis-series: Mechanical Engineering, 16/2, pp. 249-259, (2018), doi.org/10.22190/FUME180424019N,
  8. Nyers, A.; Garbai, L., Effect of the Condenser Surface on the Condenser Efficiency, Proceedings EXPRES 2014, 6th International Symposium on Exploitation of Renewable Energy Sources and Efficiency, Subotica, Serbia, ISBN 978-86-854099-6-7, (2014) pp. 54-57.
  9. Nyers, A., Víz-víz hőszivattyús fűtési rendszerek energetikai optimalizálása, Ph. D. thesis, University BMGE, Budapest, Hungary, (2016)
  10. Eordoghne Miklos, M., Investigation of energy efficiency of pumping systems by a newly specified energy parameter, Proceedings EXPRES 2019, 11th International Symposium on Exploitation of Renewable Energy sources and Efficiency. Subotica, Serbia, (2019) pp. 82-85. ISBN 978-86-919769-4-1
  11. Eördöghné Miklós, M.; Horváth, G., Nyomásfokozó szivattyúk hatásfoka részterhelésen, MAGYAR ÉPÜLETGÉPÉSZET 68, pp. 3-5, (2019)
  12. Jokar, A., Hosni H., Mohammad, J. Eckels, S., Dimensional analysis on the evaporation and condensation of refrigerant R-134a in minichannel plate heat exchangers, Applied Thermal Engineering 26 (2006) pp. 2287-2300, Available online at www.sciencedirekt.com

© 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