Performance analysis of different working fluids for use in organic Rankine cycles

被引：149

作者：

Mago, P. J. ^{[1
]}

Chamra, L. M. ^{[1
]}

Somayaji, C. ^{[1
]}

机构：

[1] Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA

来源：

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY | 2007年 / 221卷 / A3期

关键词：

organic Rankine cycle; organic fluids; refrigerants; waste heat;

D O I：

10.1243/09576509JPE372

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This article presents a second-law analysis for the use of organic Rankine cycle (ORC) to convert waste energy to power from low-grade heat sources. The organic working fluids were selected to investigate the effect of the fluid boiling point temperature on the performance of ORCs. The working fluids under investigation are R134a, R113, R245ca, R245fa, R123, isobutane, and propane, with boiling points between -43 and 48 degrees C. The results are compared with those of water under similar conditions. A combined first- and second-law analysis is performed by varying some system operating parameters at various reference temperatures. Some of the results demonstrate that ORC using R113 shows the maximum efficiency among the evaluated organic fluids for temperatures >430 K; R123, R245ca, and R245fa show the best efficiencies for temperatures between 380 and 430 K; and for temperatures <380 K, isobutane shows the best efficiency. Also, it is shown that the organic-fluid boiling point has a strong influence on the system thermal efficiency.

引用

页码：255 / 264

页数：10

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