集、输油管道沿程温降计算公式
(1) (2) (3) 式中: t1— 管道起点温度,℃; t2— 管道终点温度,℃; t0— 管道周围介质温度,℃; D— 管道外径,m; qm— 管内介质流量,kg/h; c— 介质比热容,koal/kg.℃; L—计算管段起、终点距离,m; K—管内介质至周围介质的总传热系数,kcal/m2.h.℃; a—计算常数。 |
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