CAJ | 학술논문

采用 Aspen Plus化工模拟软件对混合制冷剂液化天然气过程进行全流程的模拟计算，并对各个单元设备进行有效能分析。结果表明：压缩机的有效能损失占整个流程有效能损失的63.8%，换热过程占19%，是流程中的节能重点。在流程模拟的基础上，以高压制冷剂的压力和温度、低压制冷剂的压力和温度及混合制冷剂中甲烷与正戊烷的摩尔含量为可变因素，分析了这些因素对各设备有效能损失的影响，找出相应的影响规律，并提出了相应的降低体系有效能损失的措施与建议，对整个工艺过程的节能降耗具有一定的指导作用。结果表明：提高高压制冷剂的压力、低压制冷剂的压力与温度和混合制冷剂中正戊烷的含量，以及降低高压制冷剂的温度与混合制冷剂中甲烷含量的含量，有助于降低整个流程的有效能损失。
채용 Aspen Plus화공모의연건대혼합제랭제액화천연기과정진행전류정적모의계산，병대각개단원설비진행유효능분석。결과표명：압축궤적유효능손실점정개류정유효능손실적63.8%，환열과정점19%，시류정중적절능중점。재류정모의적기출상，이고압제랭제적압력화온도、저압제랭제적압력화온도급혼합제랭제중갑완여정무완적마이함량위가변인소，분석료저사인소대각설비유효능손실적영향，조출상응적영향규률，병제출료상응적강저체계유효능손실적조시여건의，대정개공예과정적절능강모구유일정적지도작용。결과표명：제고고압제랭제적압력、저압제랭제적압력여온도화혼합제랭제중정무완적함량，이급강저고압제랭제적온도여혼합제랭제중갑완함량적함량，유조우강저정개류정적유효능손실。
This paper presented a simulation of liquefied natural gas process of the mixed refrigerant cycle using Aspen Plus software,and calculated the exergy losses of each unit. The results showed that the exergy loss of compression process was 63.8%of all energy loss,heat transfer process accounted for 19%of the energy loss,but was the key point to reduce the exergy loss in the entire process. On the basis of the process simulation,the pressure and temperature of high-pressure refrigerant,low-pressure refrigerant,and the molar content of methane and n-pentane in the mixed refrigerants were selected as the variables in the detailed analysis of the impacts on the exergy losses. Suggestions were proposed to reduce the system effective loss. The analysis results showed that improving the high-pressure refrigerant pressure,low-pressure refrigerant pressure and temperature,and the molar content of the n-pentane in the mixed refrigerants could help reduce the exergy loss of the entire process. Reducing the high-pressure refrigerant temperature and the molar content of the methane in the mixed refrigerant process had similar effects.