Experimental and Numerical Testing of Heat Pump Evaporator
When designing a heat pump evaporator, it is necessary to use correlations that ensure small deviations of the designed and realized process parameters for specific input data. The aim of the work is to propose a suitable mathematical model for the physical process in the tubular evaporator of the h...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-11-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/23/11973 |
| _version_ | 1797463719939145728 |
|---|---|
| author | Robert Santa Mladen Bošnjaković Ante Čikić |
| author_facet | Robert Santa Mladen Bošnjaković Ante Čikić |
| author_sort | Robert Santa |
| collection | DOAJ |
| description | When designing a heat pump evaporator, it is necessary to use correlations that ensure small deviations of the designed and realized process parameters for specific input data. The aim of the work is to propose a suitable mathematical model for the physical process in the tubular evaporator of the heat pump. The applicability of the proposed mathematical model in the design of the heat pump was evaluated by comparing the results obtained from the experimental tests of the tubular evaporator of the heat pump with the numerical results obtained from the application of the proposed mathematical model. For the experimental tests, a tubular evaporator was made and 10 measuring points were set up, where the process parameters were measured (temperature and pressure drop of the working media R134a and water). Theoretical results were obtained by dividing the evaporator into control volumes and solving the corresponding system of equations of the proposed mathematical model using the Runge-Kutta and Adams Moulton predictor-corrector method. As an independent parameter, the water temperature at the inlet to the evaporator was varied in the range of 10 °C to 18 °C. The test results show that the largest deviation of the calculated and measured water temperature is +0.41 °C to −0.58 °C, while the refrigerant temperature is +0.43 °C to + 0.52 °C. The largest deviation of the evaporator thermal capacity based on the calculations and experimental tests is +9.39% to −6.31%. Based on the obtained results, it is possible to recommend the use of the proposed mathematical model for the design of the tubular evaporator of a heat pump. |
| first_indexed | 2024-03-09T17:54:42Z |
| format | Article |
| id | doaj.art-e0824c377d4c4004bc5d6e078ed8c602 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T17:54:42Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-e0824c377d4c4004bc5d6e078ed8c6022023-11-24T10:28:50ZengMDPI AGApplied Sciences2076-34172022-11-0112231197310.3390/app122311973Experimental and Numerical Testing of Heat Pump EvaporatorRobert Santa0Mladen Bošnjaković1Ante Čikić2University of Dunaujvaros, Tancsics Mihaly 1//A, 2400 Dunaújváros, HungaryTechnical Department, University of Slavonski Brod, Trg Ivane Brlić Mažuranić 2, 35000 Slavonski Brod, CroatiaDepartment of Mechanical Engineering, University North, 104. Brigade 3, 42000 Varaždin, CroatiaWhen designing a heat pump evaporator, it is necessary to use correlations that ensure small deviations of the designed and realized process parameters for specific input data. The aim of the work is to propose a suitable mathematical model for the physical process in the tubular evaporator of the heat pump. The applicability of the proposed mathematical model in the design of the heat pump was evaluated by comparing the results obtained from the experimental tests of the tubular evaporator of the heat pump with the numerical results obtained from the application of the proposed mathematical model. For the experimental tests, a tubular evaporator was made and 10 measuring points were set up, where the process parameters were measured (temperature and pressure drop of the working media R134a and water). Theoretical results were obtained by dividing the evaporator into control volumes and solving the corresponding system of equations of the proposed mathematical model using the Runge-Kutta and Adams Moulton predictor-corrector method. As an independent parameter, the water temperature at the inlet to the evaporator was varied in the range of 10 °C to 18 °C. The test results show that the largest deviation of the calculated and measured water temperature is +0.41 °C to −0.58 °C, while the refrigerant temperature is +0.43 °C to + 0.52 °C. The largest deviation of the evaporator thermal capacity based on the calculations and experimental tests is +9.39% to −6.31%. Based on the obtained results, it is possible to recommend the use of the proposed mathematical model for the design of the tubular evaporator of a heat pump.https://www.mdpi.com/2076-3417/12/23/11973evaporator mathematical modelshell and tube evaporatornumerical and experimental testing |
| spellingShingle | Robert Santa Mladen Bošnjaković Ante Čikić Experimental and Numerical Testing of Heat Pump Evaporator Applied Sciences evaporator mathematical model shell and tube evaporator numerical and experimental testing |
| title | Experimental and Numerical Testing of Heat Pump Evaporator |
| title_full | Experimental and Numerical Testing of Heat Pump Evaporator |
| title_fullStr | Experimental and Numerical Testing of Heat Pump Evaporator |
| title_full_unstemmed | Experimental and Numerical Testing of Heat Pump Evaporator |
| title_short | Experimental and Numerical Testing of Heat Pump Evaporator |
| title_sort | experimental and numerical testing of heat pump evaporator |
| topic | evaporator mathematical model shell and tube evaporator numerical and experimental testing |
| url | https://www.mdpi.com/2076-3417/12/23/11973 |
| work_keys_str_mv | AT robertsanta experimentalandnumericaltestingofheatpumpevaporator AT mladenbosnjakovic experimentalandnumericaltestingofheatpumpevaporator AT antecikic experimentalandnumericaltestingofheatpumpevaporator |