A new version (2012.040) of LEAP, the Long-range Energy Alternatives Planning system is now available for download.
This new version features improvements to user-defined variables, updated optimization routines and support for calculation of 20, 100 and 500 year global warming potential (GWP) factors. Previously only 100-year GWP factors were fully supported. The new version can also show results for Current Accounts data: before any scenarios have been created.
As always, this version is backwards compatible with earlier versions.
A detailed descriptions of the new features is provided below.
Download the full version from here...
http://tinyurl.com/leapdownload
..or use LEAP menu option Help: Check for Updates.
IMPORTANT: To fully update to this new version, download and run the full setup file from http://tinyurl.com/leapdownload LEAP's Help: Check for Updates menu option can also be used but does not automatically update the components needed for optimization calculations. If updating using Help:Check for Updates, after the update completes you can manually unzip the w32.zip and w64.zip files in the LEAP program folder to create two new folders w32 and w64.
Detailed List of Changes (2012.040: 4/9/2013)====================
* Improvements to User-defined Variables: User variables can now be assigned to categories to make them easier to organize. Use the new Analysis: Variables: Variable Categories screen to view and edit the list of categories. Color coding is now done for variable categories rather than for each user variable. The User Variables screen has also been improved.
* Lower Initial Data Requirements: You can now calculate LEAP and display results before creating any scenarios, even if your Current Accounts only contains data for a single year. This can be useful when using LEAP for teaching purposes since you can now check your results before creating scenarios. It is also useful if LEAP is being used as a single year inventory tool. All Results views (Results, Energy Balances and Summaries) now support showing single-year or multi-year results for Current Accounts only.
* Updated GLPK Solver: The GLPK solver used in LEAP's optimization calculations has been updated from v4.34 to v4.48, which seems to make optimization calculations about 20% faster. LEAP also now automatically supports both 64 bit and 32 bit versions of GLPK. On 64 bit systems this should lead to fewer out of memory errors. Check LEAP's Help: About screen to see if your system is 64 bit. Most computers using Windows 7 are 64 bit. Earlier systems are typically 32 bit.
* 20, 100 and 500 year Global Warming Potential (GWP) Factors are now calculated. Previously LEAP only supported calculation of 100 year GWP values. A setting in the General: Basic Parameters: Scope screen lets you enable calculation of all 3 sets of GWP values. By default, only the most commonly used 100 year GWP values are calculated in order to keep LEAP's calculations as fast as possible.
* Improved Display of Environmental Effects in Results View. LEAP now displays all effects in a single table and makes it easier to switch among reports for individual pollutants. The Results View screen has been simplified to make it easier to switch among different environmental effects tables.
* Optimization code now properly handles residual capacity: Existing capacity and future capacity commitments that you don't want to be optimized are now properly handled in LEAP's optimization methodology. In previous versions, the optimization routines wrote their results back into LEAP's Exogenous Capacity variable so it was not possible for the user to specify future capacity exogenously. Now, LEAP writes the results of its optimization calculations back into a new variable called "Optimized Capacity", thus leaving the Exogenous Capacity variable free for users to be able to specify current and future capacity commitments. This new approach is also much more compatible with how the Exogenous Capacity variable is used in non-optimized (simulation) calculations.
* Bug fix: LEAP sometimes reported an error of neighboring fuel shares not summing to 100%, even when the sum was in fact correct.
* Bug fix: Bad expressions imported into LEAP from Excel were incorrectly being treated as an error when the unit was set to "No data". Since these expressions are hidden they should be ignored.
* Feature Removed: The ability to allocate primary energy and emissions back to demand branches for display in results has now been removed. In some complex data sets, these calculations were heuristic in nature and occasionally prone to producing unreasonable results. I will try to re-institute this feature in the future depending on user feedback and if a more reliable and transparent algorithm can be developed. Apologies for any inconvenience.
* Various error messages improved, minor bug fixes and help files updated.
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Posted by: Charles Heaps
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