Reference : Economic Optimization of Small Scale Organic Rankine Cycles
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Energy
http://hdl.handle.net/2268/64416
Economic Optimization of Small Scale Organic Rankine Cycles
English
Tchanche, Bertrand [ > > ]
Quoilin, Sylvain mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
Declaye, Sébastien mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Turbomachines et propulsion aérospatiale >]
Papadakis, George [ > > ]
Lemort, Vincent mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
Jun-2010
Yes
No
International
23rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
June 2010
ECOS
Lausanne
Switzerland
[en] Economic Optimization ; Waste Heat Recovery ; Organic Rankine Cycle
[en] The present paper focuses on the economic optimization of a small scale ORC in waste
heat recovery application with specific investment cost as objective function. First, a pre-design model
of the ORC was built and simulations run with different working fluids to evaluate their technical
performance. In a second step, components and system cost models were built and simulations carried
out to evaluate the cost effectiveness of systems associated with different fluids. The working fluids
considered are R245fa, R123, R113, n-Pentane and n-Butane. Results indicate that for the same fluid,
the point of high performance and that f cost-effectiveness do not match. The operating point for
maximum power doesn’t correspond to that of the minimum specific investment cost. For n-Pentane,
the maximum net power of 1.98 kW is obtained for an evaporator pressure of 5.14 bar and the specific
investment cost is 5450 €/kW. For this same fluid, a minimum specific investment cost of 4440 €/kW is
obtained for an evaporator pressure of 8.5 bar and the corresponding power output is 1.745 kW. The
mismatch aforementioned is due to the thermodynamic properties such as liquid/vapour densities,
which significantly influence system performance and components sizes. Seeking for profitable
environmental solutions, economic optimization as a necessary step in the optimization of any
thermodynamic system is highly advised.
Researchers
http://hdl.handle.net/2268/64416

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