论文部分内容阅读
一、概况我国的冷藏运输事业随着国民经济的发展和人民生活水平的提高正在迅速的发展。冷藏汽车用于我国公路运输已有30年历史,生产保温汽车已有20多年,生产冷藏汽车也有十多年。目前,全国已有25个厂家生产冷藏保温汽车,遍布15个省市、品种为50多种,年产量约为1600辆,其中冷藏汽车约占30％左右,我厂年产量列居全国第十位。目前,我国冷藏汽车技术水平与世界先进水平尚有相当差距,如厢体的传热系数K值国际A级水平为0.4W/m~2K,并规定六年之后其K值不低于0.4W/m~2K+10％,我国仅
I. Overview China’s refrigerated transport industry is rapidly developing with the development of the national economy and the improvement of people’s living standards. Refrigerated vehicles have been used in China’s road transport for 30 years, producing insulated vehicles for more than 20 years and producing refrigerated vehicles for more than 10 years. At present, there are 25 factories producing refrigerated and insulated vehicles in over 15 provinces and cities all over the country, covering more than 50 varieties and annual output of about 1600 units, of which refrigerated vehicles account for about 30% of the total output. Bit. At present, the technical level of refrigerated vehicles in our country is still far behind the world advanced level. For example, the international A level of the heat transfer coefficient K of the envelope is 0.4W / m ~ 2K, and its K value is not less than 0.4W after six years / m ~ 2K + 10%, China only