Document Type Master's Dissertation Author Crous, Duncan email@example.com URN etd-05102011-124206 Document Title Biorefineries : a method to compare process alternatives using different economic scenarios Degree MEng Department Chemical Engineering Supervisor
Advisor Name Title Prof P de Vaal Supervisor Keywords
Date 2011-04-15 Availability unrestricted AbstractA general overview on biorefineries and cost estimation methods is presented to provide background knowledge needed to create software focused on comparing different biorefinery configurations. The software is implemented in Microsoft Excel 2003 and can account for the capital cost, operating cost and utility requirements of different process operations based on their operating scale. To facilitate consistency in estimating capital costs an equipment factored capital cost method is implemented based on the Guthrie method. Factors used determine the capital cost includes:
- purchased equipment cost
- paterials of construction
- operating pressure
- time index factors
The program also includes a custom search algorithm that cycles through the processes to give candidates, based on feasibility equations, of single product focused configurations that can be further customised for analysis.
With the programís focus on comparing alternatives hypothetical processes are created that give the same product but use different possessing routes and starting materials. The solver was used to calculate the candidate configurations and then manually configured to evaluate energy production from side products. The programís functionality and purpose was then shown by altering costs to give results for a different techno-economic scenario.
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Please cite as follows:
Crous, D 2010, Biorefineries : a method to compare process alternatives using different economic scenarios, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd < etd-05102011-124206/ >
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