介绍了利用HYSYS流程模拟技术，通过采用定义虚拟组分来计算增设换热器换热面积的计算方法。

This paper introduces the method for calculating the heat exchange area of the new heat exchanger by adopting HYSYS process simulation technology and definition of virtue components.

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首先利用原油实沸点蒸馏数据将原油切割为一定数目的虚拟组分，并以此作为常减压装置初馏塔的输入。

First of all, crude oil was cutting into several pseudo components which act as input of primary tower according to its true boiling points data.

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