Thermodynamic performance and environmental sustainability of adapted organic Rankine cycles at varying evaporator pressure

Thermodynamic performance and environmental sustainability (ES) of adapted organic Rankine cycles (ORCs) at varying evaporator pressure (EVP) are presented. The paper assesses the most sustainable ORCs at varying EVPs. The modified ORCs apart from the generic cycle include the ORC-internal heat exch...

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Bibliographic Details
Published inInternational journal of ambient energy Vol. 39; no. 4; pp. 332 - 342
Main Authors Abam, F. I., Ekwe, E. B., Briggs, T. A., Effiom, S. O., Ohunakin, O. S., Allen, M.
Format Journal Article
LanguageEnglish
Published Taylor & Francis 19.05.2018
Subjects
Environmental
exergy
ORC
regeneration
sustainability
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Summary:Thermodynamic performance and environmental sustainability (ES) of adapted organic Rankine cycles (ORCs) at varying evaporator pressure (EVP) are presented. The paper assesses the most sustainable ORCs at varying EVPs. The modified ORCs apart from the generic cycle include the ORC-internal heat exchanger (IHE), ORC-turbine bleeding, and ORC-turbine bleeding and regeneration. The considered performance indicators are power output (POT), overall exergy efficiency and overall exergy destruction (OED), while the ES indicators comprise waste exergy ratio (WER), exergetic sustainability index (ESI) and environmental effect factor (EEF). From the results obtained the OEF, OED and POT for the ORCs ranged between , and , respectively, at EVP of 2 and 3 MPa. Similarly, WER, ESI and EEF ranged between , and correspondingly, for the same EVPs. The findings indicate the ORC-IHE and ORC-turbine bleeding and regeneration are more sustainable using the R113 than R141b refrigerant.
ISSN:0143-0750
2162-8246
DOI:10.1080/01430750.2017.1303634