进行热力计算的目的The purpose of thermodynamic calculation

A、计算物性参数——水力计算的需要。Calculation of physical parameters - requirements for hydraulic calculation.

B、根据沿线温降曲线，分析凝析水和水合物可能形成的段落——判断水合物生成区域的需要。According to the temperature drop curve along the line, the possible stages of condensate water and hydrate formation are analyzed -- the need of hydrate formation area is determined.

C、为管线热应力计算和绝缘层选材设计提供依据——管道强度计算的需要。It provides the basis for calculation of thermal stress of pipeline and material selection design of insulation layer.

D、以上都不对