Thermodynamic simulatinos of rankine, trilateral and supercritical cycles for hot water and exhaust gas heat recovery

Hiroshi Kanno, Naoki Shikazono

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In the present study, thermodynamic performances of Rankine, trilateral and supercritical cycles are assessed. In the trilateral cycle, exergy loss is very low because of favorable temperature profile matching between the heat source and the working fluid. In the cycle simulation, operating pressures for each cycle with different working fluids are optimized so that to give highest exergy efficiency for given heat source temperature and pinch point temperature difference. Simulation results show that the exergy efficiency of trilateral cycle is about 50 %, which is about 34 % larger than that of R125 - Rankine cycle for 80°C case. For the 400°C case, water is the optimal working fluid for the trilateral cycle and the exergy efficiency is about 59.8 %. Finally, dimensionless temperature difference is introduced, and its effect on the cycle maximum available power efficiency is quantitatively assessed.

Original languageEnglish
Title of host publicationInternational Conference on Power Engineering 2013, ICOPE 2013
PublisherJapan Society of Mechanical Engineers
Publication statusPublished - 2013
Externally publishedYes
EventInternational Conference on Power Engineering 2013, ICOPE 2013 - Wuhan, China
Duration: 2013 Oct 232013 Oct 27

Other

OtherInternational Conference on Power Engineering 2013, ICOPE 2013
CountryChina
CityWuhan
Period13/10/2313/10/27

Fingerprint

Exergy
Waste heat utilization
Exhaust gases
Thermodynamics
Fluids
Water
Rankine cycle
Temperature
Hot Temperature

Keywords

  • Exergy analysis
  • Process optimization
  • Trilateral cycle
  • Waste heat recovery

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Electrical and Electronic Engineering

Cite this

Kanno, H., & Shikazono, N. (2013). Thermodynamic simulatinos of rankine, trilateral and supercritical cycles for hot water and exhaust gas heat recovery. In International Conference on Power Engineering 2013, ICOPE 2013 Japan Society of Mechanical Engineers.

Thermodynamic simulatinos of rankine, trilateral and supercritical cycles for hot water and exhaust gas heat recovery. / Kanno, Hiroshi; Shikazono, Naoki.

International Conference on Power Engineering 2013, ICOPE 2013. Japan Society of Mechanical Engineers, 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kanno, H & Shikazono, N 2013, Thermodynamic simulatinos of rankine, trilateral and supercritical cycles for hot water and exhaust gas heat recovery. in International Conference on Power Engineering 2013, ICOPE 2013. Japan Society of Mechanical Engineers, International Conference on Power Engineering 2013, ICOPE 2013, Wuhan, China, 13/10/23.
Kanno H, Shikazono N. Thermodynamic simulatinos of rankine, trilateral and supercritical cycles for hot water and exhaust gas heat recovery. In International Conference on Power Engineering 2013, ICOPE 2013. Japan Society of Mechanical Engineers. 2013
Kanno, Hiroshi ; Shikazono, Naoki. / Thermodynamic simulatinos of rankine, trilateral and supercritical cycles for hot water and exhaust gas heat recovery. International Conference on Power Engineering 2013, ICOPE 2013. Japan Society of Mechanical Engineers, 2013.
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AB - In the present study, thermodynamic performances of Rankine, trilateral and supercritical cycles are assessed. In the trilateral cycle, exergy loss is very low because of favorable temperature profile matching between the heat source and the working fluid. In the cycle simulation, operating pressures for each cycle with different working fluids are optimized so that to give highest exergy efficiency for given heat source temperature and pinch point temperature difference. Simulation results show that the exergy efficiency of trilateral cycle is about 50 %, which is about 34 % larger than that of R125 - Rankine cycle for 80°C case. For the 400°C case, water is the optimal working fluid for the trilateral cycle and the exergy efficiency is about 59.8 %. Finally, dimensionless temperature difference is introduced, and its effect on the cycle maximum available power efficiency is quantitatively assessed.

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