Open AccessModeling of a helioabsorption heat pump system for hot water supply
Author(s) -
N Nguyen Tien,
К. Х. Гильфанов,
Д. Р. Гилязов
Publication year - 2021
Publication title -
izvestiâ vysših učebnyh zavedenij. problemy ènergetiki
Language(s) - English
Resource type - Journals
eISSN - 2658-5456
pISSN - 1998-9903
DOI - 10.30724/1998-9903-2021-23-4-55-65
Subject(s) - heat pump , hybrid heat , thermosiphon , environmental science , solar energy , nuclear engineering , radiation , meteorology , environmental engineering , process engineering , mechanics , engineering , mechanical engineering , heat exchanger , physics , electrical engineering , optics
THEPURPOSE.A domestic hot water supply system is proposed, combining a solar collector and a heat pump for the climatic conditions of the city BAC NINH - VIETNAM, capable of providing hot water to 5 users all year round. Justify the performance of the proposed system under these conditions.METHODS.Thesolutionoftheproblemwascarriedoutexperimentallyandbythemethodofmathematicalmodeling.Themathematicalmodelisbasedontheenergybalanceequationstakingintoaccounttheefficiencyfactors.Theschemeandprincipleofoperationofthepilotplantandtheresultsofthecalculationofthecombinedhotwatersupplysystembasedonthemonthlyaveragevaluesofthetotaldailyradiationforthelocationofthesolarcollectorarepresented.Thesystemcontainsa solar collector with vacuum heat-absorbing tubes and an air heat pump as energy sources. With sufficient solar radiation, hot water is generated entirely from the heat-absorbing vacuum tubes, stored in the reservoir of the solar collector and passes through the reservoir of the heat pump to the consumer when the heat pump is not working. In case of insufficient solar radiation, the air heat pump is switched on. RESULTS. Thecalculationofthepowerofthesolarcollectorbasedontheaveragemonthlyvaluesofthetotaldailyradiationandtheefficiencyofthesolarcollector,theamountofheataddedtothesolarhotwatersupplysystem,theheatcapacityoftheheatpump,anda heat pump for the hot water supply system was selected.CONCLUSION. Theresultsoftheexperimentsconfirmthecalculationsforreplenishingtheheatdeficitforthesolarcollectorwithanairheatpumpoflowpoweratanytimeoftheyear.Thecalculationsaremadefora system that provides hot water for the daily needs of five and three people. It is shown that the low heating capacity of the heat pump allows one to reduce the cost of initial investment in domestic hot water supply systems with a solar collector and, accordingly, the prospects of the proposed hot water supply system in Vietnam.