Results
Title

Study on Energy Saving of Epichlorohydrin Unit Based on Entransy Theory.

Authors

Li Xia; Jianyang Ling; Zhen Xu; Zhixiang Zhang; Xiaoyan Sun; Xiaorong Cao; Shuguang Xiang

Abstract

The mathematical models for calculating the energy utilization efficiency of heat exchanger networks (HENs) based on entransy analysis method was built. The energy utilization efficiency of HENs for epichlorohydrin unit were calculated by exergy analysis and entransy analysis. Aiming at the maximum energy recovery, the entransy analysis of epichlorohydrin unit's HENs was done. By taking three different ΔTmin, 10 K, 15 K and 20 K, the results show that the exergy efficiencies are 61.01%, 59.28% and 57.27%. The entransy transfer efficiency is 42.81%, 42.13% and 41.00%. Using the entransy analysis method, utilities were saved by 19.41%, 18.01% and 15.70%. Using the exergy analysis method, utilities were saved by 16.59%, 14.86% and 12.02%. The results of different methods were analysed and compared. Exergy is more complicated than entransy in the calculation process. The exergy analysis method can not complete HENs Synthesis. But the entransy analysis method not only can complete HENs synthesis, but also can calculate the energy utilization efficiency of HENs. The entransy analysis method is more suitable for analyzing the energy utilization of epichlorohydrin unit.

Subjects

EPICHLOROHYDRIN; HEAT exchangers; ENERGY consumption; ENERGY management; MATHEMATICAL models

Publication

CET Journal - Chemical Engineering Transactions, 2020, Vol 81, p1105

ISSN

1974-9791

Publication type

Academic Journal

DOI

10.3303/CET2081185