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在由液化天然气转化为压缩天然气(LCNG)的加气站中,液化天然气(LNG)经过泵加压后,进入气化器升温为压缩天然气(CNG),此过程的冷能通常被直接释放到空气中,造成浪费。本文提出了一种适用于LCNG加气站的冷能利用装置,采用耐高压的绕管式换热器,以乙二醇水溶液为载冷剂的单级循环系统,将冷能传递给下游的蓄冰槽装置,最终冷能用于加气站的空调系统。文中分析选取了流程中的关键参数,并利用HYSYS软件模拟。根据模拟与市场调研的数据,对整个系统进行了经济性分析,进一步证明了系统的可行性。
In LPG converted from liquefied natural gas (LNG) to natural gas (LNG), liquefied natural gas (LNG) is pressurized by a pump and then enters a gasifier for heating to CNG. The cold energy of the process is usually released directly to Air, causing waste. In this paper, a cold energy utilization device suitable for LCNG filling station is proposed. A single-stage circulation system using ethylene glycol aqueous solution as a refrigerant is adopted to transfer cold energy to the downstream Ice storage tank device, the final cooling can be used for filling station air conditioning system. In this paper, the key parameters in the process are selected and analyzed by HYSYS software. According to the data of simulation and market research, the economic analysis of the whole system further proves the feasibility of the system.