Studies on the Performance of Organic Rankine Cycle Applied to Low Temperature Heat Source below 100℃

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dc.contributor.authorJi Sung Lee-
dc.description학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2016. 2. 김민수.-
dc.description.abstractIn this study, the performance of Organic Rankine Cycle (ORC) applied to low temperature heat source was investigated to provide meaningful information and better understanding on ORC. In previous studies of ORC, the types of heat source were mainly geothermal heat, solar heat, biomass combustion waste heat whose temperatures range from 150℃ to 350℃. However, although waste heat below 100℃ generated from industrial process (e.g. food, beverage, fiber industry) and PEM fuel cell has a large portion of overall waste heat, it isn’t sufficiently utilized for waste heat recovery. Therefore, it is necessary to investigate operating characteristics of ORC using waste heat from heat source under 100℃. In order to verify the performance of ORC applied to heat source below 100℃, experiment was conducted to investigate the effects of some key parameters (e.g. evaporation pressure, condensation pressure, mass flow rate, etc.) and the optimal operating condition which has maximum generation work. Results show that the maximum generation work was about 234 W and the thermal efficiency of ORC was about 4%, when the range of heat input was from 3 kW to 6 kW. By experiment of ORC applied to low temperature heat source, it was confirmed that ORC can obtain the additional generating power from waste heat under 100℃.-
dc.description.tableofcontentsChapter 1. Introduction 1 1.1 Background of the Study 1 1.2 Overview on the Organic Rankine Cycle 4 1.3 Literature Survey 9 1.4 Motivation and Objective of the Study 12 Chapter 2. Experimental Setup and Mesurements 16 2.1 Selection of the Working Fluid 16 2.1.1 Cycle Analysis 16 2.1.2 Result and Discussion of Cycle Analysis 21 2.2 Experimental System 23 2.2.1 Gear Pump 25 2.2.2 Scroll Expander 28 2.2.3 Heat Exchangers 31 2.2.4 Auxiliary Components and Measurements 33 Chapter 3. Experimental Results and Discussions 38 3.1 Experimental Procedure and Conditions 38 3.1.1 Data Reduction 38 3.1.2 Experimental Conditions 41 3.2 Performance of the Gear Pump 45 3.3 Performance of the Scroll Expander 50 3.4 Performance of the Overall System 60 3.4.1 Energetic analysis of the overall system 60 3.4.2 Exergetic analysis of the overall system 77 Chapter 4. Conclusion 81 References 83 Abstract (in Korean) 87-
dc.format.extent3202789 bytes-
dc.publisher서울대학교 대학원-
dc.subjectOrganic Rankine Cycle-
dc.subjectScroll Expander-
dc.subjectWaste Heat Recovery-
dc.subjectLow Temperature Heat Source-
dc.subjectIndustrial Waste Heat-
dc.subjectPEM fuel cell Waste Heat-
dc.titleStudies on the Performance of Organic Rankine Cycle Applied to Low Temperature Heat Source below 100℃-
dc.contributor.affiliation공과대학 기계항공공학부- 2-
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Theses (Master's Degree_기계항공공학부)
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