Organic rankine cycles (ORCs) for waste heat utilization

Yong qiang Feng; Tzu Chen Hung

doi:10.1007/978-3-030-91570-4_12

Organic rankine cycles (ORCs) for waste heat utilization

Yong qiang Feng
, Tzu Chen Hung

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

Considering the thermodynamic performance, economic performance, and environmental performance simultaneously, the thermo-environmental optimization for a series dual-pressure organicRankine cycle (STORC)and a cascaded organic Rankine cycle (CORC)has been investigated. The effects of key operating parameters on the thermal and economic performance of the system were analyzed. Based on a 3 kW ORC experimental prototype, the heat exchanger performance of different mixtures has been studied and compared. Five different proportions of working fluids were selected, respectively, R123, 0.33R123/0.67R245fa, 0.5R123/0.5R245fa, 0.67R123/0.33R245fa, and R245fa. The comparison between the experimental test and simulation result without considering the pressure drop was addressed. Results indicate that R245fa/R152a is the best candidate working fluids for CORC LT-Loop. The evaporator heat transfer coefficients of R245fa are highest, followed by the R245fa/R123 mixture and while R123 shows the lowest evaporator heat coefficients. The measured thermal efficiency of 0.67R123/0.33R245fa is the highest, which is 7.33% and the maximum simulated thermal efficiency is 14.55%.

Original language	English
Title of host publication	Waste-to-Energy
Subtitle of host publication	Recent Developments and Future Perspectives towards Circular Economy
Publisher	Springer International Publishing
Pages	347-377
Number of pages	31
ISBN (Electronic)	9783030915704
ISBN (Print)	9783030915698
DOIs	https://doi.org/10.1007/978-3-030-91570-4_12
State	Published - 8 Feb 2022

Bibliographical note

Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2022. All rights reserved.

Keywords

Evaporator heat coefficient
Organic Rankine cycle (ORC)
Pressure drop
Thermo-environmental optimization

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10.1007/978-3-030-91570-4_12

Cite this

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abstract = "Considering the thermodynamic performance, economic performance, and environmental performance simultaneously, the thermo-environmental optimization for a series dual-pressure organicRankine cycle (STORC)and a cascaded organic Rankine cycle (CORC)has been investigated. The effects of key operating parameters on the thermal and economic performance of the system were analyzed. Based on a 3 kW ORC experimental prototype, the heat exchanger performance of different mixtures has been studied and compared. Five different proportions of working fluids were selected, respectively, R123, 0.33R123/0.67R245fa, 0.5R123/0.5R245fa, 0.67R123/0.33R245fa, and R245fa. The comparison between the experimental test and simulation result without considering the pressure drop was addressed. Results indicate that R245fa/R152a is the best candidate working fluids for CORC LT-Loop. The evaporator heat transfer coefficients of R245fa are highest, followed by the R245fa/R123 mixture and while R123 shows the lowest evaporator heat coefficients. The measured thermal efficiency of 0.67R123/0.33R245fa is the highest, which is 7.33\% and the maximum simulated thermal efficiency is 14.55\%.",

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N2 - Considering the thermodynamic performance, economic performance, and environmental performance simultaneously, the thermo-environmental optimization for a series dual-pressure organicRankine cycle (STORC)and a cascaded organic Rankine cycle (CORC)has been investigated. The effects of key operating parameters on the thermal and economic performance of the system were analyzed. Based on a 3 kW ORC experimental prototype, the heat exchanger performance of different mixtures has been studied and compared. Five different proportions of working fluids were selected, respectively, R123, 0.33R123/0.67R245fa, 0.5R123/0.5R245fa, 0.67R123/0.33R245fa, and R245fa. The comparison between the experimental test and simulation result without considering the pressure drop was addressed. Results indicate that R245fa/R152a is the best candidate working fluids for CORC LT-Loop. The evaporator heat transfer coefficients of R245fa are highest, followed by the R245fa/R123 mixture and while R123 shows the lowest evaporator heat coefficients. The measured thermal efficiency of 0.67R123/0.33R245fa is the highest, which is 7.33% and the maximum simulated thermal efficiency is 14.55%.

AB - Considering the thermodynamic performance, economic performance, and environmental performance simultaneously, the thermo-environmental optimization for a series dual-pressure organicRankine cycle (STORC)and a cascaded organic Rankine cycle (CORC)has been investigated. The effects of key operating parameters on the thermal and economic performance of the system were analyzed. Based on a 3 kW ORC experimental prototype, the heat exchanger performance of different mixtures has been studied and compared. Five different proportions of working fluids were selected, respectively, R123, 0.33R123/0.67R245fa, 0.5R123/0.5R245fa, 0.67R123/0.33R245fa, and R245fa. The comparison between the experimental test and simulation result without considering the pressure drop was addressed. Results indicate that R245fa/R152a is the best candidate working fluids for CORC LT-Loop. The evaporator heat transfer coefficients of R245fa are highest, followed by the R245fa/R123 mixture and while R123 shows the lowest evaporator heat coefficients. The measured thermal efficiency of 0.67R123/0.33R245fa is the highest, which is 7.33% and the maximum simulated thermal efficiency is 14.55%.

KW - Evaporator heat coefficient

KW - Organic Rankine cycle (ORC)

KW - Pressure drop

KW - Thermo-environmental optimization

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ER -

Organic rankine cycles (ORCs) for waste heat utilization

Abstract

Bibliographical note

Keywords

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