Title: The use of pinch analysis technology to assess the energy efficiency of oil refining technologies

Authors: Ekaterina Yushkova; Vladimir Lebedev

Addresses: Department of Heat Engineering and Heat Power Engineering, St. Petersburg Mining University, 2, 21st Line, St. Petersburg, 199106, Russia ' Department of Heat Engineering and Heat Power Engineering, St. Petersburg Mining University, 2, 21st Line, St. Petersburg, 199106, Russia

Abstract: Exergy pinch-analysis of the heat exchange system of the furnace of the primary oil refining unit is carried out. Composite curves are created using a mathematical model, and then the optimal structure of the heat exchange with minimal exergy losses is constructed. Exergy pinch analysis allows revealing the magnitude and location of exergy losses. In the heat exchange system of the furnace exergy loss is 9 MW. It is possible to increase the efficiency of the furnace by 18.5%. An additional heat exchanger connecting it to the oil stream is introduced for rational use of residual exergy.

Keywords: exergy; exergoeconomic; pinch analysis; exergy pinch analysis; heat exchanger system; primary distillation of oil.

DOI: 10.1504/IJEX.2023.128531

International Journal of Exergy, 2023 Vol.40 No.1, pp.108 - 127

Received: 22 Apr 2022
Received in revised form: 26 Aug 2022
Accepted: 02 Oct 2022
Published online: 25 Jan 2023 *