Title: Energy and exergy analyses of a combined cycle Kalina and organic Rankine cycles using waste heat

Authors: Mehdi Mansoury; Samad Jafarmadar; Shahram Khalilarya

Addresses: Mechanical Engineering Department, Technical Education Faculty, Urmia University, Urmia, West Azerbaijan 57561-15311, Iran ' Mechanical Engineering Department, Technical Education Faculty, Urmia University, Urmia, West Azerbaijan 57561-15311, Iran ' Mechanical Engineering Department, Technical Education Faculty, Urmia University, Urmia, West Azerbaijan 57561-15311, Iran

Abstract: In current research, wasted heat from a reactivity controlled compression ignition (RCCI) engine provides driving energy for organic Rankine cycle (ORC) and Kalina cycle. After developing a numerical model for this system, the effects of some decision variables on the energy and exergy efficiencies are studied. The obtained results show that, by adding ORC and Kalina cycles, energy and exergy efficiency values are increased while, brake specific values of oxides of nitrogen (NOx) and carbon monoxide (CO) emissions are decrease in selected three engine operation modes (4, 9 and 23 bar indicated mean effective pressure) without changing in fuels consumption.

Keywords: RCCI engine; thermo/computational simulation; ORC cycle; Kalina cycle; energy; exergy; emissions.

DOI: 10.1504/IJEX.2018.094601

International Journal of Exergy, 2018 Vol.27 No.2, pp.251 - 286

Received: 24 Jan 2018
Accepted: 27 May 2018
Published online: 07 Sep 2018 *

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