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Charging and Discharging Long-Term Ice Storage 长期蓄冰的充放电
巨大的固体冰具有非常低的热备用损失,因此非常适合用于冷却建筑物的长期储存。这意味着从嵌入的流体输送管进行冻结(充注)和熔化(排出)传热。由于冰的质量非常大,可以长期提供,而排放过程中的传热率保持在每天的水平,因此嵌入管间距可以经济地设置为更大的间距。本文旨在说明如何在不同的循环时间内确定此类间距,并说明被冻结材料的不同导热系数、不同的管径和1到200天不等的放电时间的影响。 将计算结果与实际结果进行了对比分析。更宽的管道间距对长期或季节性储存的成本有重大影响,无论是在更大的储罐中还是在地下。单位:双引文:研讨会,ASHRAE交易,1987年,第93卷,第。1,纽约州纽约市
Massive solid ice has very low thermal standby loss and thus is well suited for long-term storage for cooling buildings. This implies freezing (charging) and melting (discharging) heat transfer from imbedded fluid-carrying tubes. Since the ice mass is very large to provide for the long term while the heat transfer rate during discharge remains at a daily level, imbedded tube spacing can economically be placed at greater spacing intervals.It is the purpose of this paper to show how such spacing is determined for different cycle times and to show the effect of different thermal conductivities of the material being frozen, different tube diameters, and discharge times varying from 1 to 200 days. Calculated and actual results are contrasted and differences analyzed.Wider tube spacing is shown to have a major effect on the cost of longer term or seasonal storage, whether in a larger tank or in the ground.Units: Dual
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