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针对利用液化天然气冷能作为冷源的区域供冷系统,设计了2种方案.方案1使用冰作为蓄冷介质,先用液化天然气的冷能制冰,然后将冰运送至区域供冷系统的中心冷站.方案2则直接利用液化天然气冷能冷却回水,并通过管道运输冷冻水至需冷终端.冷能运输过程中的冷量损失是影响系统效率的主要因素,在评估2种方案的效率时对其进行了重点分析.分析结果显示,利用液化天然气冷能进行区域供冷在经济上是现实可行的.方案2的供冷距离限于13km以内,方案1则没有供冷距离的限制.当供冷距离在6～13km之间时,方案2的效率更高;当供冷距离小于6km或大于13km时,采用方案1在经济上更为合理.
Two schemes are designed for the regional cooling system that uses the cold energy of liquefied natural gas as the cooling source: Option 1 uses ice as the cold storage medium, ice-making with liquefied natural gas and then ice to the center of the regional cooling system Cold station.Sem 2 directly use the liquefied natural gas to cool the backwater cooling and chilled water through the pipeline to the cold terminal.Cold energy loss in the process of cold energy transport is the main factor affecting system efficiency in the assessment of two kinds of programs Efficiency analysis, the results show that it is economically feasible to use the cold energy of LNG for district cooling.The cooling distance of Option 2 is limited to within 13km, and Option 1 is not limited by the cooling distance. Scenario 2 is more efficient when the cooling distance is between 6 and 13 km, and Scenario 1 is economically justified when the cooling distance is less than 6 km or greater than 13 km.