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DC Field | Value | Language |
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dc.citation.endPage | 47 | - |
dc.citation.startPage | 31 | - |
dc.citation.title | ENERGY CONVERSION AND MANAGEMENT | - |
dc.citation.volume | 160 | - |
dc.contributor.author | Jang, Yongtae | - |
dc.contributor.author | Lee, Jaeseon | - |
dc.date.accessioned | 2023-12-21T21:07:47Z | - |
dc.date.available | 2023-12-21T21:07:47Z | - |
dc.date.created | 2018-03-18 | - |
dc.date.issued | 2018-03 | - |
dc.description.abstract | The purpose of this study is to determine the optimal operating conditions and performance for the design of ORC based biomass compact CHP for 2 kW of electric, 25 kW of thermal power productions and 60 degrees C warm water supply. Eight organic working fluids were selected based on thermo-physical properties and related environmental regulations: cyclopentane, isopentane, n-pentane, diethyl ether, HFO-1233zd, HFC-245fa, HFE7000 and HFE-7100. The selected organic fluids were classified into three groups considering latent heat and boiling point. The group A fluids contained cyclopentane, isopentane, n-pentane and diethyl ether. The group B fluids contained HFO-1233zd and HFC-245fa. The group C fluids contained HFE-7000 and HFE-7100. A micro CHP system composed of a biomass boiler (200 degrees C heat source), an ORC power cycle and a cooling water line (20 degrees C cooling water supply) was modeled in four variants depending on whether post-heater and IHE were applied or not. The subcritical ORC cycle and saturated vapor state at the inlet of the expander were considered for the analysis. As a result of thermodynamic analyses and optimizations, the group A fluids have the best CHP performance because of the greatest latent heat amount. The systems using the group A fluids have the lowest mass flow rates from 0.053 kg/s to 0.081 kg/s, the lowest required heat supplies from 31.64 kW to 34.61 kW, the highest ORC efficiencies from 5.95% to 7.29% and the CHP efficiencies from 71.83% to 72.32%. The group B fluids have the mass flow rates from 0.157 to 0.215 kg/s, the highest required heat supplies from 36.98 kW to 46.41 kW, the lowest system efficiencies from 4.59% to 6.05% and the highest CHP efficiencies from 72.05% to 73.41%. The group C fluids have the highest mass flow rates from 0.213 kg/s to 0.230 kg/s, the required heat supplies from 32.30 kW to 40.54 kW, the system efficiencies from 5.07% to 6.36% and the lowest CHP efficiencies from 71.31% to 72.33%. In addition, ORC systems using the group A or group C fluids can operate at low pressure and can meet system requirements with low cooling water mass flow rate because of the high boiling points. For the group A fluids, both post-heater and IHE are very effective for the system, and the system using the group B fluids can highly improve the system through the application of the post-heater. For the group C fluids, application of the IHE significantly improves system performance. | - |
dc.identifier.bibliographicCitation | ENERGY CONVERSION AND MANAGEMENT, v.160, pp.31 - 47 | - |
dc.identifier.doi | 10.1016/j.enconman.2018.01.025 | - |
dc.identifier.issn | 0196-8904 | - |
dc.identifier.scopusid | 2-s2.0-85044637251 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/23868 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0196890418300256 | - |
dc.identifier.wosid | 000428099700004 | - |
dc.language | 영어 | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Optimizations of the organic Rankine cycle-based domestic CHP using biomass fuel | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Thermodynamics; Energy & Fuels; Mechanics | - |
dc.relation.journalResearchArea | Thermodynamics; Energy & Fuels; Mechanics | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Combined heat and power (CHP) | - |
dc.subject.keywordAuthor | Organic Rankine cycle | - |
dc.subject.keywordAuthor | Biomass | - |
dc.subject.keywordAuthor | Optimization | - |
dc.subject.keywordAuthor | Working fluids | - |
dc.subject.keywordPlus | LOW-GRADE HEAT | - |
dc.subject.keywordPlus | WORKING FLUIDS | - |
dc.subject.keywordPlus | THERMAL-STABILITY | - |
dc.subject.keywordPlus | ENERGY-SOURCES | - |
dc.subject.keywordPlus | SMALL-SCALE | - |
dc.subject.keywordPlus | ORC | - |
dc.subject.keywordPlus | POWER | - |
dc.subject.keywordPlus | SYSTEMS | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | CONVERSION | - |
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