天然气余压发电制冰系统设计及实际产能模拟

Design and Practical Productivity Simulation of Natural Gas Residual Pressure Power Generation Ice Making System

针对天然气分输站目前无法对管输天然气压力能进行有效回收的问题,以及传统的制冰行业电力消耗较大,而冰需求市场又逐年扩大等问题,本文提出一种天然气余压发电制冰一体化系统。系统主要包括膨胀发电系统、冷能利用系统两部分,利用膨胀机回收天然气压力能并同轴带动发电机发电,再利用换热器对膨胀机出口的低温天然气冷能进行回收。然后结合某天然气分输站供气参数和膨胀机特性曲线,用Aspen软件对整个工艺流程进行模拟,以估算系统的实际发电量、产冰量。系统既得到了高品位的电能,同时也能缓解冰需求市场的压力,降低了制冰行业的高电力消耗。

There is no effective practical solution for recycling pipe transportation natural gas energy at natural gas distribution station and large electrical power consumption and huge ice demand for traditional ice making industry. The article puts forward integrated natural gas residual pressure power generation ice making system. The system includes expansion power generation system, cooling energy utilization system. Using expansion system to recycle natural gas residual pressure energy and driving coaxial generator to produce electricity, then using heat exchanger to recycle low temperature natural gas from expansion exit. Combined with gas supplying parameter and expansion unit characteristic curve at some natural gas distribution station, the author calculates practical power generation quantity and ice making quantity through Aspen software to simulate whole process. System has high grade electrical energy and reduces ice making demand pressure to cut down high electricity consumption of ice making industry.