Title: Entropy generation rate analysis in pendulum cart system undergoing damped oscillation

Authors: Amin A. Mohammed; Mehmet Sunar; Ahmet Z. Sahin

Addresses: Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia; K.A. CARE Energy Research and Innovation Center, Dhahran 31261, Saudi Arabia ' Mechanical Engineering Department, Yildirim Beyazit University, Ankara 06760, Turkey ' Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia; K.A. CARE Energy Research and Innovation Center, Dhahran 31261, Saudi Arabia

Abstract: A mechanical system consisting of a cart with slender rod is considered in this work for entropy generation rate investigation via a thermodynamic analysis. The dynamic model of the system is formulated using Lagrange's equation. Entropy generation rate is then introduced as the time derivative of the net-work potential of the system. Entropy generation rate is simulated for different initial conditions and a parametric study is performed to examine the effect of different parameters such as damping and stiffness on the entropy production. It is found that, entropy generation rate follows a pattern of three peaks being repeated with time. The stiffness and initial conditions have direct effect on the entropy generation rate. In this case, increasing either property increases entropy generation rate. The maximum EGR is found to be 0.332 × 10−4 and 0.600 × 10−4 W/K for nonlinear and linearised system respectively.

Keywords: entropy generation rate; exergy destruction; damping; mechanical oscillation.

DOI: 10.1504/IJEX.2020.106452

International Journal of Exergy, 2020 Vol.31 No.3, pp.217 - 231

Received: 31 Jan 2019
Accepted: 05 Aug 2019

Published online: 06 Apr 2020 *

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