Integration of waste heat and renewable sources of energy in the crude oil atmospheric distillation plant

Projektiranje procesa za povrat otpadne toplinske energije i implementaciju obnovljivih izvora energije provedeno je u postrojenju za Atmosfersku destilaciju nafte u okviru Rafinerije nafte Sisak, INA – Industrija nafte d.d. Zagreb. Pritom je pokazano da je racionalno korištenje toplinske energije u postrojenju moguće unaprijediti na dva načina: (i) kroz projektiranje sustava za povrat energije, te (ii) kroz ugradnju postrojenja zasnovanog na binarnom ORC‐u (Organskom Rankine‐ovom ciklusu). Istraživanje je provedeno primjenom suvremenih, sustavno‐orijentiranih metoda projektiranja procesa, s fokusom na dvije metode integracije toplinskih procesa, odnosno one zasnovane na tzv. „Pinch“ i Eksergijskoj analizi. Prikazani rezultati istraživanja pokazuju da je moguć značajan doprinos unaprjeđenju energetskih, ekoloških i ekonomskih performansi analiziranog postrojenja, te ga je moguće poopćiti za širu primjenu metodologije projektiranja procesa na sličnim problemima u procesnoj industriji, te da se obnovljivi izvori energije mogu na jednostavan način integrirati u energetsku bilancu postrojenja.Process design for waste heat recovery and implementation of the renewable sources of energy is carried out for the Atmospheric distillation plant within the Oil refinery in Sisak, owned by INA – Industrija nafte d.d. Zagreb. The results have shown that rational use of thermal energy within the plant can be improved in two ways: (i) by designing the heat recovery system and (ii) by installing binary ORC (Organic Rankine Cycle) units. The research has been conducted by using the modern, system‐oriented methods of process design, specifically the two methods of Heat integration based on Pinch and Exergy analysis. The presented research results have shown that it is possible to significantly contribute to the improvement of energy, environmental and economic performance of the plant, and that it is possible to generalize the proposed methodologies for a wider application of the Process design methods to similar problems in process industry, and to easily incorporate the renewable energy sources in the overall plant energy balance