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介绍停留在管道及贮槽内的流体温度降怎样随时间变化的计算方法。经过T时间后,求管道或者贮槽内的静止流体温度Q_2的公式如下:Q_2=(Q_1-Q_r)·l-AT/B+Q_r(1)式中Q_1——开始时流体温度(℃);Q_2——经过T时间后流体的温度(℃);Q_r——外界空气温度(℃);A——放热系数:对管道根据(2)式;对贮槽根据(4)式;T——经过的时间(小时);B——热容量系数:对管道根据(3)式;对贮槽根据(5)式。1.管内流体管内流体温度降的放热系数A与热容量系数B由下式计算。
Describe how the calculation of how the fluid temperature drop in pipes and tanks changes over time. After T time, find the temperature of stationary fluid in pipeline or storage tank, Q_2 is as follows: Q_2 = (Q_1-Q_r) · l-AT / B + Q_r (1) where Q_1 is the fluid temperature at the beginning ; Q_2 - the temperature of the fluid after the passage of time T (° C); Q_r - the temperature of the outside air (° C); A - the heat release coefficient: for the pipe according to (2) - time elapsed (hours); B - heat capacity factor: for pipe according to (3); for tank according to (5). 1. Tube fluid tube fluid temperature drop exotherm A and thermal capacity coefficient B by the following formula.