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http://dx.doi.org/10.3795/KSME-B.2012.36.6.593

Exhaust-Gas Heat-Recovery System of Marine Diesel Engine (II) - Exergy Analysis for Working Fluids of R245fa and Water -  

Choi, Byung-Chul (Environment & Plant Team, Korean Register of Shipping)
Kim, Young-Min (Department of Engine Research, Korea Institute of Machinery & Materials)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.6, 2012 , pp. 593-600 More about this Journal
Abstract
The exergy characteristics for R245fa and water working fluids have been analyzed for an electric generation system utilizing the Rankine cycle to recover heat from the wasted exhaust gas from a diesel engine used for the propulsion of a large ship. The theoretical calculation results showed that the efficiencies of exergy and system exergy improved as the turbine inlet pressure increased for R245fa at a fixed mass flow rate. Furthermore, the exergy destruction rates of the condenser and evaporator were relatively larger than those in other components. The exergy efficiency of the system increased with increasing mass flow rate. For a water working fluid, although the exergy destruction rate of the evaporator was similar to that for R245fa, the exergy loss rate varied significantly in response to variations in the pressure and mass flow rates at the turbine inlet.
Keywords
Rankine Cycle; R245fa; Water; Exergy;
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Times Cited By KSCI : 1  (Citation Analysis)
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