基于HYSYS的LNG冷能利用方案设计与优化

Design and Optimization of LNG Cold Energy Utilization Scheme Based on HYSYS

摘要: 本文针对某型液化天然气(LNG)燃料动力渔船，基于船舶的发电、冷库及空调的需求，同时考虑船内余热资源以及发动机消耗的LNG汽化冷能，以实现LNG冷能的梯级合理利用为目标，提出其综合利用设计方案。在对设计方案系统利用Aspen HYSYS软件进行流程模拟计算的基础上，对设计方案的循环工质选择等方面进行了优化，最终优化方案经过工质优化后总体㶲效率达到了39.54%，设备投入可以在2.1年内回收成本。

Abstract: This article focuses on a certain type of liquefied natural gas (LNG) fuel powered fishing vessel, based on the needs of power generation, cold storage, and air conditioning of the vessel, while con-sidering the residual heat resources inside the vessel and the LNG vaporization cooling energy con-sumed by the engine. The goal is to achieve the rational utilization of LNG cooling energy in a cas-cade manner, and proposes a comprehensive utilization design scheme. On the basis of using Aspen HYSYS software for process simulation calculations in the design scheme system, optimization was carried out on the selection of circulating working fluids in the design scheme. After optimizing the working fluids, the overall efficiency of the optimized scheme reached 39.54%, and the equipment investment can recover costs within 2.1 years.