상변화물질(PCM)을 이용한 열교환기용 동파방지밸브에 관한 실험적 연구
An Experimental Study on the Freezing Protection Valve Using Phase Change Material(PCM) for the Heat Exchanger
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참고문헌
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초록
This paper is an experimentalstudy on the freezing protection valve used for solar water heating,air-conditioningsystems,andplumbingsystems.Whenthephasechangeoccursfrom liquidtosolid,mostofthe substancesexceptwatervolumetricallyshrink.AndreferredtoasPCM(PhaseChangeMaterial)asubstancewith suchproperties,thephasechangetemperaturevariesdependingonthematerial.Topreventthefreezingofthe plumbingsystem,suchasair-conditioningsystem inthewinterseason,wedevelopedaseveraltypesoffreezing protectionvalveusingPCM whosefreezingtemperatureare2-4℃.Theworkingprincipleofthefreezingprotection valveisthatthefluidinsidethepipeisreleasedtopreventthesystem-collapsewhenfluidtemperaturereaches the freezing temperature ofthe PCM.And then the valve is closed and returned to the originalposition automaticallywhenthetemperatureoftheoperatingfluidrises.Inthispaper,theoperatingtemperatures,discharge flow rateandtheresponsecharacteristicsofthevalveduringtheoperationaretestedandinvestigated.From the resultsofthisresearchthefreezingprotectionvalvesemployingPCM areexpectedtobecommercializedinthe nearfuture.
Abstract
This paper is an experimentalstudy on the freezing protection valve used for solar water heating,air-conditioningsystems,andplumbingsystems.Whenthephasechangeoccursfrom liquidtosolid,mostofthe substancesexceptwatervolumetricallyshrink.AndreferredtoasPCM(PhaseChangeMaterial)asubstancewith suchproperties,thephasechangetemperaturevariesdependingonthematerial.Topreventthefreezingofthe plumbingsystem,suchasair-conditioningsystem inthewinterseason,wedevelopedaseveraltypesoffreezing protectionvalveusingPCM whosefreezingtemperatureare2-4℃.Theworkingprincipleofthefreezingprotection valveisthatthefluidinsidethepipeisreleasedtopreventthesystem-collapsewhenfluidtemperaturereaches the freezing temperature ofthe PCM.And then the valve is closed and returned to the originalposition automaticallywhenthetemperatureoftheoperatingfluidrises.Inthispaper,theoperatingtemperatures,discharge flow rateandtheresponsecharacteristicsofthevalveduringtheoperationaretestedandinvestigated.From the resultsofthisresearchthefreezingprotectionvalvesemployingPCM areexpectedtobecommercializedinthe nearfuture.
참고문헌 (5)
- "Air & Coil Co. (USA) Product Catalog-ue", ~
- "Thermo-Omega-Tech Co.(USA) Pro- duct Catalogue", ~
- Jeong, Soon-young, "An Experimental Study on the Freezing Protection Valve Using Phase Change Material(PCM) for the HVAC System", Proceedings of the 29th KSES Confere- nce (2012)
- Research & Business Development of Freezing Protection Valve Using Phase Change Material, "Yun, Jea-ho", MKE, ~, pp.Final Report (2012)
- Yun, Jea-ho, "Development and Commercialization Technology Support on Freezing Protection Valve", Enterprise Specializing in Parts and Materials, MKE (2009)