저온 열원으로부터 최대 동력을 생산하기 위한 유기랭킨사이클(ORC)에 관한 연구
Study on Organic Rankine Cycle (ORC) for Maximum Power Extraction from Low-Temperature Energy Source
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초록
ORC(organicRankinecycle)haspotentialofreducing consumption offossilfuelsand hasmany favorable characteristics to exploit low-temperature heat sources.This work analyzes performance of ORC with superheatingusinglow-temperatureenergysourcesintheform ofsensibleenergy.Maximum massflow rateof aworkingfluidrelativetothatofasourcefluidisconsiderdtoextractmaximum powerfrom thesources.Working fluidsofR134a,iC4H10andC6H6,andsourcetemperaturesof120℃,200℃ and300℃ areconsideredinthiswork. Results show thatfora fixed source temperature thermalefficiency increases with evaporating temperaure,howevernetworkperunitmassofsourcefluidhasamaximum withrespecttotheevaporatingtemperaturein therangeoflow sourcetemperature.Resultsalsoshow thatthemaximum powerextractionispossiblewithR134a forthesourcetemperatureof120℃,withiC4H10 for200℃,andwithC6H6 for300℃.
Abstract
ORC(organicRankinecycle)haspotentialofreducing consumption offossilfuelsand hasmany favorable characteristics to exploit low-temperature heat sources.This work analyzes performance of ORC with superheatingusinglow-temperatureenergysourcesintheform ofsensibleenergy.Maximum massflow rateof aworkingfluidrelativetothatofasourcefluidisconsiderdtoextractmaximum powerfrom thesources.Working fluidsofR134a,iC4H10andC6H6,andsourcetemperaturesof120℃,200℃ and300℃ areconsideredinthiswork. Results show thatfora fixed source temperature thermalefficiency increases with evaporating temperaure,howevernetworkperunitmassofsourcefluidhasamaximum withrespecttotheevaporatingtemperaturein therangeoflow sourcetemperature.Resultsalsoshow thatthemaximum powerextractionispossiblewithR134a forthesourcetemperatureof120℃,withiC4H10 for200℃,andwithC6H6 for300℃.
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