Cooldt calculate the cooling duration of a multi-layers pipe in a cold environment. The duration to reach the “Final fluid temperature” or cool-down time (CDT) is calculated by solving the heat equation in cylindrical coordinates with a flux conservative formulation.
To install the Excel Add-in, follow these instructions. For the 32 bits version of Excel select cooldt.xll and for the 64 bits version of Excel select cooldt-w64.xll. No administrative privilege are required to install it.
Open CooldtSheet.xls or CooldtSheet.ods, enter your data then click the Launch cooldt button.
The cooldt executable and the spreadsheet must be in the same folder and the decimal separator must be the point (.)
On Windows, Cooldt can not run on an UNC path (i.e. a path starting with \\). Map your UNC path, or run Cooldt from a local drive to solve this problem
The Excel Add-in provides a native Excel function to calculate cool-down time. It is very useful to calculate an insulation thickness for a given cool-down time with the Excel solver. Avoid goal seek, it does not work very well with non-linear functions. To use the CoolDownTime function, click on the fx button on the formula bar, select the Cooldt 2 category, select the CoolDownTime function then enter your data. Examples of usage are presented on the CooldtSheet.xls spreadsheet.
cooldt example.dat to calculate the cool-down time of the
example.dat data file. Results will be saved to the
cooldt-w64 if you are using the 64 bits version of Windows.
The data file is a text file with numbers separated by spaces or tabs. The file format is presented in the table below:
Several files can be processed in one command, e.g. type
cooldt file-1.dat file-2.dat file-3.dat to process three files.
To generate png and svg plots from a Cooldt output file, use the
gnuplot-script.gp script file with the Gnuplot command:
gnuplot -e "OutputFile='example.txt';" gnuplot-script.gp
Cooldt includes XLW – A Wrapper for the Excel API
Yes. Cooldt is a free software. Read the license for details.
On Windows, Cooldt can not run on an UNC path (i.e. a path starting with \\). Map your UNC path, or run Cooldt from a local drive to solve this problem.
Since Windows Vista and Excel 2007, it is %APPDATA%\Microsoft\AddIns. The following command should open this folder:
Replace the old .xll file with new one in the add-in folder.