EXPERIMENTAL STUDY OF THE EXERGETIC, EXERGOECONOMIC AND EXERGOENVIRONMENTAL PERFORMANCE FOR TRACTOR ENGINE INTEGRATED WITH ORC AND RANKINE CYCLE BASED ON SIMULATED DATA

Abstract

This study carries out detailed simulation-based experimental investigation of a dual-loop waste heat recovery (WHR) system which combined an Organic Rankine Cycle (ORC) and a steam Rankine Cycle for the purpose of improving the efficiency of tractor diesel engines. The high temperature (HT) loop is equipped with a steam Rankine cycle to recupetrate exhaust gas heat, the low-temperature (LT) loop has an ORC connected to its jacket cooling water and to the condenser of HT loop. Based on the simulated data obtained from an experimentally validated 110 kW tractor diesel engine model under selected load conditions, this work presents an assessment of exergetic efficiency as well as exergoeconomic costs and exergoenvironmental performances. ORC working fluid is R245fa, and steam cycle working fluid is water. The highlighted results demonstrate a peak net power level of 12.5 kW with an overall engine efficiency increase of 11.4%. Exergetic efficiency is maximum (52.3%) with avoidable exergy destruction to a large extent in the evaporator (28.4 kW). The specific investment cost (SIC) has been founded 8450 $/kW, using exergeo-economic analysis and the optimal value of exergoenvironmental impact would be obtained equal to 72 mPts/h for R245fa. This integration, aimed at fuel saving and emission reduction among agricultural machines holds a great promise with the view of the principle of sustainable engineering. sciencedirect.