【名词&注释】
常压塔(atmospheric tower)、换热器(heat exchanger)、辛烷值(octane number)、催化重整(catalytic reforming)、传热系数(heat transfer coefficient)、分馏精确度(degree of fractionation)
[单选题]流体速度对换热器的传热系数(heat transfer coefficient)的影响是()
A. 流速越大,传热系数(heat transfer coefficient)越大
B. 流速越大,传热系数(heat transfer coefficient)越小
C. 流速的大小不影响传热系数(heat transfer coefficient)
D. 以上都不对