Optimisation Of Cogeneration Systems –
Combined Production Of Methanol And
Electricity
Author(s)
C. Werner & H. L. Estrada Hummelt
Abstract
This paper discusses an example of cogeneration, viz. the combined production
of methanol and electricity. In this regard technical and economic criteria of a
typical MegaMethanol plant (capacity: 5000 metric tons per day) and a gassteam
power plant on natural gas basis (capacity: 750 MW) are presented. A
mathematical simulation model summarises the specific criteria of both systems.
Aim of this study is the optimisation of the combined production of methanol
and electricity. A specific approach to optimise the exergy and/or cost efficiency
is applied. Therefore, the energy supply design of the MegaMethanol plant is
analysed and evaluated in terms of combined thermodynamic and economic aspects.
The significance of different dimensioning parameters of the energy
supply design is demonstrated by means of sensitivity analyses. These sensitivity
analyses categorise the power plant design parameters in relation to the potential
to affect the methanol and electricity costs. Accordingly the energy supply design
of the MegaMethanol plant is modified successively in an iteration process.
The optimisation results in a gas-steam power plant design characterised by
increased exergy efficiency and decreased cost efficiency. Recommendations for
advanced optimisation studies of cogeneration concepts are made.
Keywords: cogeneration, methanol, electricity, thermoeconomics.
Keywords
cogeneration, methanol, electricity, thermoeconomics
Related Book
Other papers in this volume
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