基于LNG冷能及燃料电池余热的KCS-DORC系统优化

陈旭阳; 杨帆; 李鹏飞; 海笑; 高月; 姜文全

doi:doi:10.19912/j.0254-0096.tynxb.2024-1143

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基于LNG冷能及燃料电池余热的KCS-DORC系统优化

更新时间：2026-01-08

- 基于LNG冷能及燃料电池余热的KCS-DORC系统优化
- Vol. 46, Issue 12, Pages: 152-160(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：doi:10.19912/j.0254-0096.tynxb.2024-1143
  CLC： TK123
- Published Online：07 January 2026，
  
  Published：2025
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陈旭阳, 杨帆, 李鹏飞, et al. 基于LNG冷能及燃料电池余热的KCS-DORC系统优化[J]. 2025, 46(12): 152-160.
DOI：

陈旭阳, 杨帆, 李鹏飞, et al. 基于LNG冷能及燃料电池余热的KCS-DORC系统优化[J]. 2025, 46(12): 152-160. DOI： doi:10.19912/j.0254-0096.tynxb.2024-1143.

摘要

面向天然气燃料电池余热与液化天然气冷能的高效利用

设计整合氨水循环和双级有机朗肯的联合循环方案。通过数值模拟的计算方法

分析乙烷及其混合工质的热经济性能

同时分析汽轮机4入口压力p18、R1270质量流量qm

11和汽轮机1入口温度t26对系统的影响并对系统进行优化。结果表明：在高温级有机朗肯循环中

工况2的整体性能优于工况1

在乙烷与R600质量分数为0.2、0.8时净输出功最大。增加p18、qm

11和t26均有利于提升系统净输出功和热效率

增加p18有利于提升系统的㶲效率

但不利于系统的经济性。Matlab优化结果为3731.72 kW、41.95%和2.751×10-2美元/kWh。系统折旧回收期为4.94 a

冷库制冷系数为0.233。

Abstract

Aiming at the problems of waste heat recovery in solid fuel cells using natural gas as fuel and the utilization of cold energy in liquefied natural gas

a combined power cycle of ammonia-water power cycle and two-stage organic Rankine was proposed. The thermo-economic performance of hexane and its mixture was analyzed by the calculation method of numerical simulation. The effects of TUR4 inlet pressure

R1270 mass flow rate and TUR1 inlet temperature on system was also analyzed

followed by system optimization. The results show that the overall performance of Case 2 is superior to Case 1 in the high-temperature grade organic Rankine cycle

and the net output power is maximum at hexane/R600 mass fraction of （0.2/0.8）. Increasing

and enhances net power output and thermal efficiency

while elevating improves exergy efficiency but compromises economic performance. Matlab optimization results are 3731.72 kW

41.95% and 2.751×10 $/kWh. The system depreciation payback period and cold storage cooling factor are 4.94 years and 0.233 respectively.

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