Title: An exergy study on compression ignition engine operating with biogas gas and coke oven gas

Authors: Hongqing Feng; Zhirong Nan; Xinyi Wang; Weiwen Zhang

Addresses: Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil Energy, College of New Energy, China University of Petroleum, Qingdao, 266580, China ' College of New Energy, China University of Petroleum, Qingdao, 266580, China ' College of New Energy, China University of Petroleum, Qingdao, 266580, China ' Weichai Power Co., Ltd., Weifang, 261000, China

Abstract: This paper studies the combustion emission characteristics, exergy conversion and utilisation, and irreversibility of compression ignition (CI) engines fuelled by coke oven gas (COG) and biogas, which is conducted by establishing a zero-dimensional single-zone combustion model and an exergy analysis model. When the intake air temperature is same, the peak temperature of the COG in the cylinder is higher than the biogas, and the difference is about 64 K, which results in much higher NO_x emission of the coke oven gas. The irreversible loss of COG-fuelled engines in the working process is 22% and the working exergy accounts for 58%, which is much larger than biogas. By properly increasing the intake air temperature, the intake pressure and speed can reduce the irreversible loss.

Keywords: coke oven gas; COG; biogas; exergy analysis; compression ignition engine.

DOI: 10.1504/IJEX.2020.109987

International Journal of Exergy, 2020 Vol.33 No.2, pp.183 - 197

Received: 24 Jul 2019
Accepted: 08 Apr 2020
Published online: 30 Sep 2020 *

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