Performance Analysis of Dual-loop Heat Recovery System

Jian Song, Xiao Dong Ren, Chun Wei Gu

Research output: Contribution to journalArticlepeer-review

Abstract

A dual-loop system is designed to recover the waste heat of a diesel engine in this paper. The high-temperature (HT) loop utilizes the heat load of the engine exhaust gas, and the low-temperature (LT) loop uses the heat load of the jacket cooling water and the residual heat of the HT loop sequentially. These two loops are coupled via a shared heat exchanger. Water is selected as the working fluid for the HT loop while organic fluids are used in the LT loop. The influence of the HT loop parameters on the performance of the LT loop is evaluated. The simulation results reveal that under different operating conditions of the HT loop, the pinch point of the LT loop occurs at different locations and therefore, results in different evaporation temperatures and other thermal parameters. The maximum net power output of the dual-loop ORC system reaches 115.1 kW, which leads to an increase of 11.6% on the original power output of the diesel engine.

Original languageEnglish
Pages (from-to)1491-1495
Number of pages5
JournalKung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
Volume38
Issue number7
Publication statusPublished - 1 Jul 2017

Bibliographical note

Publisher Copyright:
© 2017, Science Press. All right reserved.

Keywords

  • Dual-loop system
  • Organic Rankine Cycle
  • Pinch point
  • Waste heat recovery

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

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