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dc.contributor.authorRithy Kongen_US
dc.contributor.authorThoranis Deethayaten_US
dc.contributor.authorAttakorn Asanakhamen_US
dc.contributor.authorTanongkiat Kiatsiriroaten_US
dc.date.accessioned2022-05-27T08:30:18Z-
dc.date.available2022-05-27T08:30:18Z-
dc.date.issued2022-08-01en_US
dc.identifier.issn22131388en_US
dc.identifier.other2-s2.0-85125735143en_US
dc.identifier.other10.1016/j.seta.2022.102125en_US
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85125735143&origin=inwarden_US
dc.identifier.urihttp://cmuir.cmu.ac.th/jspui/handle/6653943832/72832-
dc.description.abstractPerformance analyses and economic evaluations based on exergy-costing of a biomass-boiler organic Rankine cycle coupled with a cascade heat pump system for combined heat and power generation were investigated. The net power outputs of the Rankine cycles were 7 and 20 kWe at the condensing and evaporating temperatures of 40 and 100 °C, respectively. The heat pump generated chilled water (10–28 °C) for reducing the Rankine cycle condensing temperature to improve the cycle performance and to generate hot water (80–90 °C) for preheating the boiler water condensate after supplying heat at the Rankine cycle evaporator and for other thermal applications. When the Rankine cycle condensing temperature was reduced from 40 to 30 °C, the cycle net power output and its first law and second law efficiencies could be enhanced by 22, 15 and 16.5%, respectively. The combined heat pump-organic Rankine cycle thermal and exergy efficiencies also increased with the Rankine cycle condensing temperature reduction. The heat-to-power energy ratio of the thermal and electrical energy generated by the system was also given corresponding to the Rankine cycle condensing temperature reduction. From the study, the highest ratio of 11 could be obtained at the Rankine cycle condensing temperature of 32 °C. From economic assessments based on exergy-costing, the unit costs of exergy by the combined cycle were lower than the power grid electrical charge of 0.128USD/kWhe for Thailand, when the Rankine cycle condensing temperature was lower than 38 °C. As the condensing temperature was 33 °C or below, the unit cost of exergy was nearly steady. At this temperature, the annual generated exergies were 593.1×103 and 1692.84×103 kWhe, the unit costs of exergy were 0.08 and 0.079 USD/kWh, respectively, for the systems with 7 and 20 kW Rankine cycles and the payback periods were also found to be 6.69 and 6.35 years with palm fruit bunch biomass.en_US
dc.subjectEnergyen_US
dc.titlePerformance analysis of biomass boiler-organic Rankine cycle with assisted cascade heat pump for combined heat and power generation including exergy-costingen_US
dc.typeJournalen_US
article.title.sourcetitleSustainable Energy Technologies and Assessmentsen_US
article.volume52en_US
article.stream.affiliationsChiang Mai Universityen_US
article.stream.affiliationsNational Bank of Cambodiaen_US
Appears in Collections:CMUL: Journal Articles

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