Title: Development and investigation of a hydrogen enriched natural gas fuelled HCCI engine for combined generation of power, heating, and cooling

Authors: Tawfiq Abdul-Aziz Al-Mughanam; Abdul Khaliq

Addresses: Department of Mechanical Engineering, College of Engineering, King Faisal University, P.O. Box 380, Al-Ahsa 31982, Saudi Arabia ' Mechanical Engineering Department, College of Engineering at Yanbu, Taibah University, Yanbu Al-Bahr 41911, Saudi Arabia

Abstract: A hydrogen-natural gas blend is utilised in homogeneous charge compression ignition (HCCI) engine using an ejector refrigeration cycle (ERC) for production of power, cooling, and heating. An exergy model was built to assess the impact of some variables on performance of combined system. The system was simulated employing the engineering equation solver (EES) software and the REFPROP toolbox library data. The thermal and exergy efficiencies of HCCI engine resulted in an increase from 47.56% to 57.75% and from 43.45% to 48.44%, whereas combined system efficiencies were increased by 21.51% and 11.76% when hydrogen addition is promoted from 0% to 20%.

Keywords: HCCI engine; ERC cycle; hydrogen; natural gas; exergy analysis; waste heat.

DOI: 10.1504/IJEX.2024.141695

International Journal of Exergy, 2024 Vol.45 No.1/2, pp.144 - 157

Received: 23 May 2024
Accepted: 13 Jul 2024
Published online: 30 Sep 2024 *

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