쇼케이스의 실제 운전상태를 고려한 축냉시스템 적용 가능성 평가 기초 연구
A Feasibility Study for the Application of the Cold-heat Storage System Considering the Real Operation Status of the Showcase
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초록
Experimentalstudywasperformedtounderstandtherealoperationconditionsofashowcaseworkingusually inaconvenientstoreanddiscountstore.Thepurposeofthisstudywastoshow thepossibilityforpracticaluse ofcold-heatstorage systems being operated for the showcase. To do that, evaporator and condenser temperaturesweremeasuredandthecompressorelectricpowerconsumptionweremeasuredsimultaneously. To usetheicestoragesystem,theicemakingprocesswastypicallyoperatedduringmidnightbeingnotneededthe coolingoftheshowcasethroughthecontinuousrunningofthecondenserunit. Andthen,therefrigerantwas subcooledusingthestoredcold-heatafterbeingdischargedfrom thecondenserduringdaytime. So,thecooling performancewasincreasedwiththesub-coolingofrefrigerantduringdaytime,hencetheactualrunningtimeof thecompressorcouldbeeffectivelydecreased.Throughtheexperiments,thisstudyshowedthatthecompressor electric power consumption during daytime could be transferred to nighttime for applying the refrigerant sub-cooling.So,fortheconvenientstore,themaximum loadtransferratesforeachworkingcoolerandshowcase wereestimatedabout31.1% and19.9% respectively.Andforthediscountstore,themaximum loadtransferrates foreachrefrigerationandfreezingshowcasewereestimatedabout34.1% and49.0% respectively.
Abstract
Experimentalstudywasperformedtounderstandtherealoperationconditionsofashowcaseworkingusually inaconvenientstoreanddiscountstore.Thepurposeofthisstudywastoshow thepossibilityforpracticaluse ofcold-heatstorage systems being operated for the showcase. To do that, evaporator and condenser temperaturesweremeasuredandthecompressorelectricpowerconsumptionweremeasuredsimultaneously. To usetheicestoragesystem,theicemakingprocesswastypicallyoperatedduringmidnightbeingnotneededthe coolingoftheshowcasethroughthecontinuousrunningofthecondenserunit. Andthen,therefrigerantwas subcooledusingthestoredcold-heatafterbeingdischargedfrom thecondenserduringdaytime. So,thecooling performancewasincreasedwiththesub-coolingofrefrigerantduringdaytime,hencetheactualrunningtimeof thecompressorcouldbeeffectivelydecreased.Throughtheexperiments,thisstudyshowedthatthecompressor electric power consumption during daytime could be transferred to nighttime for applying the refrigerant sub-cooling.So,fortheconvenientstore,themaximum loadtransferratesforeachworkingcoolerandshowcase wereestimatedabout31.1% and19.9% respectively.Andforthediscountstore,themaximum loadtransferrates foreachrefrigerationandfreezingshowcasewereestimatedabout34.1% and49.0% respectively.
참고문헌 (3)
- Park, S-S,, "Technology of the ice storage system", Magazine of the SAREK, 30(6), pp.6~15 (2001)
- Lee, D-W., "Sub-cooling effect using cold storage system", Proceedings of the SAREK, 2007, Summer Annual Conference, pp.1067~1071 (2007)
- Shin, Y-H., "Measurement and analysis of showcase field data", Proceedings of the SAREK, 17(5), pp.436~443 (2005)