Compressor Heat Pump Model Based on Refrigerant Enthalpy and Flow Rate

• Autorzy: Obstawski Paweł , Bakoń Tomasz , Gajkowski Jacek

Identyfikatory

DOI

10.12913/22998624/170971

• Języki publikacji: EN

Abstrakty

EN

This paper introduces a compressor heat pump model using flow rate and enthalpy values for the calculation of heat pump control parameters. The aim of in this article presented research work was to develop an universal model of a compressor heat pump which will enable simulation tests for compressors of any volumetric efficiency with variable operating parameters (e.g. temperature of the lower source and condensation temperature) worked with any refrigerant. An additional assumption was the possibility of conducting simulation tests continuously. The model was developed on the basis of equations describing the thermodynamic transformations taking place in the refrigeration system. The data needed for the model are the input signals of saturation and condensation temperatures and the refrigerant mass flow rate entered as a time series. The output signals are heating capacity, cooling capacity, power consumed by the compressor, and the temperature at the second point of the thermodynamic cycle of the refrigerant. The paper presents equations for examples of the frequently used refrigerants R410a and R290 and practical verification of the presented algorithm in the laboratory made for refrigerant R410a. A description of the laboratory stand is also included. Comparison of the capacity provided by the condenser and the coefficient of performance with the values simulated using the proposed model confirms the correctness of the applied model and its practicality. The results obtained by simulation and measurements show very good convergence. The developed model makes it possible to calculate the operational parameters of the device, e.g. such as COP and SCOP for given boundary conditions, which then enables to estimate the coverage degree of the heat load of the building by the heat pump due to central heating and to estimate momentary and seasonal operating costs of the heat pump.

Słowa kluczowe

EN

heat pump; R410A refrigerant; R290 refrigerant; COP (coefficient of performance)

• Wydawca: Lublin University of Technology ; Polish Society of Ecological Engineering (PTIE), Branch of PTIE in Lublin
• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2023
• Tom: Vol. 17, no 5
• Strony: 12--27
• Opis fizyczny: Bibliogr. 18 poz., fig., tab.

Twórcy

autor

Obstawski Paweł

• Warsaw University of Life Sciences Warsaw, Warsaw, PL

• https://orcid.org/0000-0002-7808-8861

autor

Bakoń Tomasz

• Warsaw University of Life Sciences Warsaw, Warsaw, PL

• https://orcid.org/0000-0002-2028-6881

autor

Gajkowski Jacek

• Warsaw University of Life Sciences Warsaw, Warsaw, PL

Bibliografia

• 1. Grong T.S. 2009: Modeling of Compressor Characteristics and Active Surge Control. Norwegian University of Science and Technology, Department of Engineering Cybernetics.
• 2. Eames I.W., Milazzo A., Maidment G.G. 2014: Modelling thermostatic expansion valves. International Journal of Refrigeration 38: 189–197.
• 3. Liang Ch., Jiangping Ch., Jinghui L., Zhijiu Ch. 2009: Experimental investigation on mass flow characteristics of electronic expansion valves with R22, R410A and R407C. Energy Conversion and Management 50: 1033–1039.
• 4. Nyers J., Nyers A. 2014: Investigation of Heat Pump Condenser Performance in Heating Process of Buildings using a Steady-State Mathematical Model. Energy and Buildings 75: 523–530.
• 5. Tangwe S., Simon M., Meyer E.L., Mwampheli S., Makaka G. 2015: Performance optimization of a nair source heat pump water heater using mathematical modeling. Journal of Energy in Southern Africa 26: 296–105.
• 6. Bamohrnsiri Ch. 2011: Investigation of the Dynamic Behavior of Heat Pumps for the Future Integration in Load Mangement Strategies, Semester Thesis. EEH – Power Systems Laboratory, Swiss Federal Institute of Technology (ETH), Zurich.
• 7. Brown J.S., Domanski P.A., Lemmon E.W. 2009: Cycle_D version 4.0: Theoretical vapor compresion cycle design program. 3rd IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants, Boulder, CO 204.
• 8. Casetta D. 2012: Implementation and validation of a Ground Source Heat Pump model in MAT LAB, Master’s Thesis in Sustainable Energy Systems. Department of Energy and Environ ment, Divison of Building Services Engineering, Chalmers University of Technology, Gothenburg, Sweden.
• 9. Muttakin M., Amin Z.M. 2014: Mathematical Modelling and Experimental Validation of Solar Assisted Heat Pump System. IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) 11: 32–41.
• 10. Kara O., Ulgen K., Hepbasli A. 2008: Exergetic assessment of direct-expansion solar-assisted heat pump systems: Review and modeling. Renewable and Sustainable Energy Reviews 12: 1383–1401.
• 11. Uhlmann M., Bertsch S.S. 2012: Theoretical and experimental investigation of startup and shutdown behavior of residential heat pumps. International Journal of Refrigeration 35: 2138–2149.
• 12. Zhang Ch.-L., Yuan H. 2014: An important feature of air heat pump cycle: Heating capacity in line with heating load. Energy 72: 405–413.
• 13. Baster M.E. 2011: Modelling the performance of Air Source Heat Pump Systems, A thesis submitted in partial fulfilment for the requirement of the degree Master of Science. Sustainable Energy: Renewable Energy Systems and the Environment, University of Strathclyde, Engineering, Department of Mechanical Engineering.
• 14. Monticelli: Modelling of a Transcritical CO2 Heat Pump System for High Temperature Air Heating.
• 15. Domanski P.A., Mclinden M.O. 1992: A Simplified Cycle Simulation Model for the Performance Rating of Refrigerants and Refrigerant Mixtures. International Journal of Refrigeration December.
• 16. Fardoun F., Ibrahim O., Zoughaib A. 2011: Dynamic modeling of a nair source heat pump water heater. 10th International Energy Agency Heat Pump Conference 2011 – HPC, Tokyo, Japan.
• 17. Camdali U., Bulut M., Sozbir N. 2015: Numerical modeling of a ground source heat pump: The Bolu case. Renewable Energy 83: 352–361.
• 18. Du Pont Suva Refrigerant 2004: Thermodynamic Properties of DuPont Suva 410A Refrigerant (R- 410A), Technical Information, T-410A-SI.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).