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3.2 Applied drying - Economic model The following method section describes how to use the economic model, and details the input and output variables and mechanisms that generate the output data. 3.2.1 How to use the model The following section is a user guide explaining how to use the economic model. Running model To run the model, open (double click) the file ‘KilnCompare.exe’. Opening files To open a previously saved data file select File/Open when running the model. Select the directory and file you wish to open. A default file called ‘Kiln data’ can be opened when the model is run. This is a read only file. This file provides sensible data and can be used as a starting point for further model manipulation. Saving files To save a file under the same name you have previously opened select File/Save. You cannot save to the default file ‘Kiln data’ as it is a read only file. To save the file under a different filename select File/Save As and enter the new file name in the Filename box. Entering data Data can be entered into the first four pages selected via the tabs labelled Finance, Capacity, Operations and Wood. Numerical data only are allowed. Observing model outputs Model outputs can be observed by selecting the fifth tab labelled Calculation. Information Input variable information can be observed by ‘double clicking’ the input variable headings. 3.2.2 Inputs Drying costs are analysed using a number of input variables allowing the total drying costs to be estimated. The model application consists of four input variable pages accessed by the tabs labelled: Finance, Capacity, Operations and Wood. The following provides an explanation of the input variables required. Finance variables Project life – Depreciation period where the capital cost of the kiln is straight line depreciated over project life (years). Kiln capital ($) – The capital cost of a single kiln Interest rate (%) – The interest charged on stock holdings Wood value ($/m3) – The value of a cubic metre of green-sawn stacked wood Electrical($) - The price of electricity 13PDF Image | Evaluation of super-heated steam vacuum drying
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