Performance analysis of a reheat-dual pressure ORC coupling vortex tube for waste heat and pressure recovery from slag granulation

BU Shujuan; YANG Zhen; YAN Zhenchao; SONG Qiang; DUAN Yuanyuan

doi:10.11949/0438-1157.20260051

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Performance analysis of a reheat-dual pressure ORC coupling vortex tube for waste heat and pressure recovery from slag granulation

更新时间：2026-04-28

- Performance analysis of a reheat-dual pressure ORC coupling vortex tube for waste heat and pressure recovery from slag granulation
- CIESC Journal (2026)
- 作者机构：
  
  1.清华大学热科学与动力工程教育部重点实验室，北京 100084
  2.辽宁工程技术大学机械工程学院，辽宁阜新 123000
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260051
  CLC： TK 11⁺5
- Received：12 January 2026，
  
  Revised：2026-04-22，
  
  Accepted：23 April 2026，
- 稿件说明：
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BU Shujuan, YANG Zhen, YAN Zhenchao, et al. Performance analysis of a reheat-dual pressure ORC coupling vortex tube for waste heat and pressure recovery from slag granulation[J/OL]. CIESC Journal, 2026.
DOI：

BU Shujuan, YANG Zhen, YAN Zhenchao, et al. Performance analysis of a reheat-dual pressure ORC coupling vortex tube for waste heat and pressure recovery from slag granulation[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260051.

摘要

在“双碳”目标下，工业余压回收不足问题突出。本文针对冶金熔渣气淬干式粒化过程产生的余热与余压，提出一种耦合涡流管的再热朗肯-双压有机朗肯循环系统（RRC-VT-DPORC），以实现二者的梯级协同利用。构建了能量、㶲、㶲经济及㶲环境分析模型，评估有无涡流管回收余压时的系统性能，研究气流速度（

）与涡流管冷流比（

）对系统的影响，并采用多目标优化确定最优运行参数。结果表明：当

=450m/s、

=0.5时，与无涡流管的RRC-DPORC系统相比，RRC-VT-DPORC系统的热效率与㶲效率均提高27%以上，但总㶲成本率与总㶲环境影响率分别增加13.5%和13.9%。两组多目标优化对应不同的工程偏好：以热效率为目标时，系统倾向于高冷流比（

=0.848）和较高气流速度（

=396 m/s），以降低压缩机功耗；以㶲效率为目标时，系统倾向于低冷流比（

=0.102）和较低气流速度（

=390 m/s），以提高ORC发电量；工程上可根据实际需求灵活选用相应工况。本研究可为工业余能高效利用与碳减排提供技术参考。

Abstract

Under the "Dual Carbon" goals

industrial waste pressure recovery remains inadequate. This study proposes a novel system integrating a vortex tube with a reheated Rankine cycle and a dual-pressure organic Rankine cycle (RRC-VT-DPORC) to synergistically recover waste heat and pressure from slag gas-quenching granulation. Energy

exergy

exergoeconomic

and exergoenvironmental models were developed to evaluate the performance of systems with and without vortex tube waste-pressure recovery. The influence of airflow velocity (

) and cold flow ratio of the vortex tube (

) was analyzed

and multi-objective optimization was employed to determine the optimal operating parameters. Results indicate that under the specified conditions of a

of 450 m/s and a

of 0.5

the RRC-VT-DPORC system exhibited an increase in thermal efficiency and exergy efficiency exceeding 27% relative to the baseline RRC-DPORC system without a vortex tube; however

this enhancement was accompanied by a rise in the exergy cost rate and exergoenvironmental impact rate of 13.5% and 13.9%

respectively. The two multi-objective optimization strategies correspond to different engineering preferences: when thermal efficiency is taken as the objective

the system favors a high cold flow ratio (

=0.848) and a relatively high airflow velocity (

=396 m/s) to reduce compressor power consumption; when exergy efficiency is taken as the objective

the system favors a low cold flow ratio (

=0.102) and a relatively low airflow velocity (

=390m/s) to increase ORC power output. Engineering practices can flexibly select the appropriate operating conditions according to actual needs. This study provides a technical reference for efficient i

ndustrial waste energy utilization and carbon emission reduction.

关键词

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