Research on Energy Saving of Hydrodewaxing Unit Based on Entransy
ZHAO Tingting1, LUAN Qiuqin2, WANG Yuxin1, XIA Li1, SUN Xiaoyan1, XIANG Shuguang1
1. School of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2. Qingdao Gatexin Safety Technology Company Limited, Qingdao 266042, China
Abstract：The concept of entransy is used to describe the ability of transfer heat, and the energy utilization efficiency based on entransy theory can be used as a basis for evaluating the rational use of heat. The mathematical models for calculating the energy utilization efficiency of heat exchanger networks (HENs) based on entransy analysis method was built in this work. With the aim of the maximum energy recovery, the energy utilization efficiency of the HEN in hydrodewaxing unit was studied, and the rationality of the entransy transfer efficiency was verified. By taking the minimum heat transfer temperature difference (ΔTmin) of 10, 15 and 20 K respectively, the results showed that the exergy efficiency were 90.32%, 89.20%, 88.08% and utilities were saved by 65.00%, 59.25% and 55.10% using the exergy analysis method. The entransy transfer efficiency were 74.91%, 73.46%, 72.01% and utilities were saved by 55.44%, 51.73% and 48.01% using the entransy analysis method. Thus, the entransy transfer efficiency can be used to analyze whether the heat of the heat exchange network is effectively utilized, and then achieve the maximum utilization of heat and the goal of the best economic benefit of the device.
ZHAO Tingting,LUAN Qiuqin,WANG Yuxin et al. Research on Energy Saving of Hydrodewaxing Unit Based on Entransy[J]. Chemical Reaction Engineering and Technology, 2022, 38(5): 446-452.
