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The characteristics of a Linear Joule Engine Generator operating on a dry friction principle

Lookup NU author(s): Ugo Ngwaka, Dr Boru Jia, Christopher Lawrence, Dr Dawei WuORCiD, Dr Andrew SmallboneORCiD, Professor Tony Roskilly



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


In this paper, the friction characteristics of a novel Linear Joule Engine Generator operating on dry frictionmechanism is presented. A numerical model of the friction forces is represented through the development of adry friction force model integrated into a mass-spring-damper system with viscous damping and spring constantto emulate compressor and expander operating pressures. Experimental results from a Linear Joule EngineGenerator prototype are compared with the numerical simulation results predicted by the proposed frictionmodel and other reported friction models identified from the wider engineering literature. Finally, the relationshipbetween electric generator load and friction power of Linear Joule Engine Generator is established.

Publication metadata

Author(s): Ngwaka U, Jia B, Lawrence C, Wu D, Smallbone A, Roskilly AP

Publication type: Article

Publication status: Published

Journal: Applied Energy

Year: 2019

Volume: 237

Pages: 49-59

Print publication date: 01/03/2019

Online publication date: 07/01/2019

Acceptance date: 30/12/2018

Date deposited: 10/01/2019

ISSN (print): 0306-2619

ISSN (electronic): 1872-9118

Publisher: Pergamon Press


DOI: 10.1016/j.apenergy.2018.12.081


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