The up-to-date standard about exergy analysis and its implementation example in methanol synthesis process
by Lejun Feng; Zhihao Fu; Xiaohui Chen; Weijia Huang
International Journal of Exergy (IJEX), Vol. 42, No. 4, 2023

Abstract: As an evaluation tool, exergy analysis method urgently requires the technical standard to perform energy management. However, the update of related standard is rarely found for more than a dozen years. China is issuing the third version of its exergy analysis standard (GB/T 14909-2021). As the members in the drafting group, authors of this work introduce the main amendments made in GB/T 14909-2021. First, the new environmental reference state was established, the new models to estimate the standard exergy and enthalpy of complex fuels were proposed, and the energy grade definition was adopted. Then, this work selected a typical methanol synthesis process as an example of implementing GB/T 14909-2021 for the first time that applies this standard. The rigorous procedure was complied with and the data of material, energy, and exergy balance was obtained. The indexes of energy grade, exergy efficiency, and local exergy loss ratio were evaluated. Finally, some technical measures were proposed to reduce energy loss and to improve the energy consumption level of the system. This implementation example can be referred to for other similar cases of energy and chemical industrial system.

Online publication date: Mon, 08-Jan-2024

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Exergy (IJEX):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com