When calculating variables in eQUEST , users may consider introducing that old concept of algebra. Yup, you heard me correctly, algebra - Users may specify a word, instead of a numerical value. Later this leaves the ability to simply change the value of the word.
This is done by creating global parameters.
To create a global parameter, it is best to know the target value, in this case, the intended target is .29 for the shading coefficient of a glass type
Right click the project name and select “Create Global Parameter”
Give the Parameter a name, select numeric value and select the value of .29. Highlight the name of the value and then click copy for use later click ok. eQUEST will then display a list of all global parameters.
Having created the parameter, it must be put to use. After all, Global parameters are useless unless they are applied.
Find the parameter to edit, in this case the glass type and open it.
Right click the target variable and select “edit/view user expression”
Type the word parameter, followed by a parenthesis, and a double quote, then paste the name of the global parameter followed by a double quote and the closing parenthesis.
Once everything is entered correctly, click okay.
If no mistakes are made the value of the global parameter should appear in magenta, reflecting the value of the global parameter.
Now, global parameters may be used to optimize parametric runs:
To set up a parametric run to use global parameters:
Click “Create Parametric run” and give the run an appropriate name.
Select the appropriate base run, in this case we leave the default
Click Create Parametric Component
Select Global Parameter as the category
then select numeric as the type, which will display the current value
Change the value to the designated value. Here we select .2 and click done
At this point a user could proceed with other changes or run the simulation as necessary.