Modelling oil-shale integrated tri-generator behaviour: predicted performance and financial assessment

J. O. Jaber, S. D. Probert and P. T. Williams

Applied Energy, 1998, vol. 59, issue 2-3, 73-95

Abstract: A simple theoretical model relating the inputs and outputs of the proposed process has been developed; the main objectives being to predict the final products (i.e. the production rates for liquid and gaseous fuels as well as electricity), the total energy-conversion efficiency and the incurred costs under various operating conditions. The tri-production concept involves the use of a circulating fluidised-bed combustor together with a gasifier, retort and simple combined-cycle plant. The mathematical model requires mass and energy balances to be undertaken: these are based on the scarce published data about retorting as well as fluidised-bed combustion and gasification of oil shale. A prima facie case is made that the proposed tri-production plant provides an attractive and economic means for producing synthetic fuels and electricity from oil shale. The unit cost of electricity, so generated, would at present be about 0.057 US$ per kWh, assuming a 10% annual interest charge on the invested capital. If the produced shale oil could be sold for more than 25 US$ per barrel, then the cost of the generated electricity would be appropriately less and hence more competitive.

Date: 1998
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