{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T10:04:04Z","timestamp":1762077844424,"version":"build-2065373602"},"reference-count":27,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2022,11,23]],"date-time":"2022-11-23T00:00:00Z","timestamp":1669161600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Applied Sciences"],"abstract":"<jats:p>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 \u00b0C to 18 \u00b0C. The test results show that the largest deviation of the calculated and measured water temperature is +0.41 \u00b0C to \u22120.58 \u00b0C, while the refrigerant temperature is +0.43 \u00b0C to + 0.52 \u00b0C. The largest deviation of the evaporator thermal capacity based on the calculations and experimental tests is +9.39% to \u22126.31%. 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.<\/jats:p>","DOI":"10.3390\/app122311973","type":"journal-article","created":{"date-parts":[[2022,11,23]],"date-time":"2022-11-23T09:50:52Z","timestamp":1669197052000},"page":"11973","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Experimental and Numerical Testing of Heat Pump Evaporator"],"prefix":"10.3390","volume":"12","author":[{"given":"Robert","family":"Santa","sequence":"first","affiliation":[{"name":"University of Dunaujvaros, Tancsics Mihaly 1\/\/A, 2400 Duna\u00fajv\u00e1ros, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9882-585X","authenticated-orcid":false,"given":"Mladen","family":"Bo\u0161njakovi\u0107","sequence":"additional","affiliation":[{"name":"Technical Department, University of Slavonski Brod, Trg Ivane Brli\u0107 Ma\u017eurani\u0107 2, 35000 Slavonski Brod, Croatia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ante","family":"\u010ciki\u0107","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, University North, 104. Brigade 3, 42000 Vara\u017edin, Croatia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,11,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1016\/0196-8904(84)90051-7","article-title":"Theoretical analysis of the dynamic interactions of vapour-compression heat pumps","volume":"24","author":"Macarthur","year":"1984","journal-title":"Energy Conserv. Manag."},{"key":"ref_2","first-page":"1159","article-title":"Prediction of cyclic heat pump performance with a fully distributed model and a comparison with experimental data","volume":"93","author":"Macarthur","year":"1987","journal-title":"ASHRAE Trans."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1016\/0140-7007(94)90050-7","article-title":"A dynamical model adequate for controlling the evaporator of heat pump","volume":"17","author":"Nyers","year":"1994","journal-title":"Int. J. 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