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低温储罐作为储存和运输低温液体的设备,必须具有良好的绝热保温性能,否则经济性和安全性均无法保证。根据外渗隔热原理,提出一种新型的低温储罐结构——外渗隔热储罐,该结构利用储罐内产生的蒸发气外渗通过储罐侧壁的渗透材料,提高低温储罐侧壁的绝热性能。建立了储罐的传热模型,利用该模型,分别对储罐的罐顶、侧壁和罐底进行了漏热量计算。结果表明:与传统储罐相比,外渗隔热储罐侧壁漏热量减少60.7%,储罐的总漏热量和日蒸发损失减少22.2%,储罐绝热性能大大提高。
Cryogenic storage tank as a storage and transport of cryogenic liquid equipment, must have good insulation properties, or economy and safety can not be guaranteed. According to the principle of extraneous seepage and insulation, a new type of cryogenic storage tank structure - extravasated insulated storage tank is put forward. The structure utilizes the infiltrated gas generated in the storage tank to infiltrate the infiltration material through the side wall of the storage tank to improve the low temperature storage tank Thermal insulation of the side wall. The heat transfer model of the storage tank was established. By using this model, the heat leaks were calculated on the tank roof, sidewalls and tank bottom respectively. The results show that compared with the traditional storage tank, the leakage heat loss of the external insulation tank decreases 60.7%, the total leakage heat loss and daily evaporation loss of the storage tank decreases by 22.2%, and the heat insulation performance of the storage tank is greatly improved.