天然气客车尾气余热驱动制冷空调研究  

Study on Onboard Absorption Refrigerating System with Exhaust heat Recovery for Natural gas Buses

作　　者：吴亦枫 李志勇[1] WU Yifeng;LI Zhiyong(Department of building environment and energy application engineering,Jiaxing University,Jiaxing Zhejiang 314001,China)

机构地区：[1]嘉兴学院建筑环境与能源应用工程系,浙江嘉兴314001

出　　处：《交通节能与环保》2020年第6期13-18,31,共7页Transport Energy Conservation & Environmental Protection

基　　金：浙江省自然科学基金(LY18G030024);国家级大学生创新创业训练计划项目(201910354021)。

摘　　要：文章提出了大中型天然气客车上应用烟气型双效溴化锂吸收式制冷设备回收尾气余热的方案,可将车载天然气能源的综合利用率提升约4.6%。在气温低于35℃时余热驱动制冷可独立满足车厢冷负荷需求,高于35℃时,每升高1度,车厢冷负荷需求满足率下降约4%。面向60座公交案例分析表明,设备占用车体空间小于0.3 m^3,车顶冷却塔高度小于0.4 m,面积小于3 m^2,适用车载环境装配。节能效益分析表明,在夏热冬暖地区产生的收益可在车辆运行年限内回收成本。Application of double-effect LiBr refrigeration device is studied to make good use of exhaust heat from natural gas buses.With the proposed solution,the overall energy efficiency of natural gas can increase by 4.6%approximately.Energy supply and demand analysis shows that the cooling capacity of the absorption refrigerating device can meet the cooling load independently if the outdoor air temperature is below 35℃.When the air temperature above 35℃,the refrigerating output generated from exhaust heat recovery cannot meet cooling demand of the passenger compartment,and the balance increases approximate 4%while the ambient temperature goes up 1℃.A case study on a bus with 60 seats shows that the size of LiBr refrigeration device with appropriate engineering design is applicable to the space of the bus.The total volume of the Li-Br device is no more than 0.3 m3 inside the bus,and the height of cooling tower located on the bus roof is less than 0.4 m with area of 3 m2.Cost-benefit analysis indicates that in the southern region of hot summer and warm winter zone in China the total economic gains from fuel saving can compensate for the cost of the Li-Br absorption refrigerating system within eight years lifetime of the bus.

关 键 词：车辆工程 天然气客车 余热利用 吸收式制冷 

分 类 号：U464.333[机械工程—车辆工程]