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

被引：3

作者：

Abam, F. I. ^{[1
]}

Ekwe, E. B. ^{[1
]}

Briggs, T. A. ^{[2
]}

Effiom, S. O. ^{[3
]}

Ohunakin, O. S. ^{[4
]}

Allen, M. ^{[1
]}

机构：

[1] Michael Okpara Univ Agr, Dept Mech Engn, Umuhia, Nigeria

[2] Univ Port Harcourt, Dept Mechatron Engn, Port Harcourt, Nigeria

[3] Cross River Univ Technol, Dept Mech Engn, Calabar, Nigeria

[4] Covenant Univ Otta, Dept Mech Engn, Ota, Ogun State, Nigeria

来源：

INTERNATIONAL JOURNAL OF AMBIENT ENERGY | 2018年 / 39卷 / 04期

关键词：

Environmental; sustainability; exergy; ORC; regeneration;

D O I：

10.1080/01430750.2017.1303634

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 [动力工程及工程热物理]; 0820 [石油与天然气工程];

摘要：

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 35.45 <= OEE <= 47.23%, 64.21 <= OED <= 77.71 kWand 44.19 <= POT <= 58.69 kW, respectively, at EVP of 2 and 3 MPa. Similarly, WER, ESI and EEF ranged between 0.253 <= WER <= 0.278, 1.149 <= ESI <= 1.872 and 0.547 <= EEF 0.818 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.

引用

页码：332 / 342

页数：11

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