What's New in ENPEP-BALANCE Version 2.20 (pdf)

Center for Energy, Environmental, andEconomic Systems Analysis (CEEESA)Modifications and Enhancementsto ENPEP for WindowsFor Upgrades from Version 2.15g to 2.20System, Database, and File Management FeaturesFor ENPEP to work properly, the regional settings on your computer must be set to English (UnitedStates) with a point as decimal symbol instead of a comma. The regional settings can be found inthe Windows Control Panel. ENPEP now checks the regional system settings for the number anddate format, and issues a warning if yourcurrent setting is not set to English(United States).During the model installation, you nowhave the option of allocating a portion ofthe physical RAM to ENPEP. Typically,we recommend using about 50% of theactual RAM of your computer for ENPEP.Memory will be allocated only when youstart the BALANCE module and will bereleased when BALANCE is closed.Memory allocation reduces model runtimes – the more RAM you allocate, thefaster your case runs.ENPEP now has a new databasemanagement, backup, and recoveryroutine. Instead of relying on only oneCreate a new(blank)databaseEach study isnow a databasefile on yourhard driveAdd an existingdatabase to thislistHere is the pathand name of thehighlighteddatabase filedatabase (enpepwin.db) as in earlier versions, version 2.20 now allows you to keep your cases indifferent databases. In fact, the databases replace the studies used in previous versions. Eachdatabase can be thought of as a study. Each database will be backed-up at regular intervals set bythe user under “Run Parameters.” This design change significantly reduces data loss in case ofpower outages or system crashes.If you transition from 2.15 or an earlier version to 2.20 and you have more than one study in yourdatabase, please contact us for more detailed instructions.A new 30-day trial and evaluation version for ENPEP for Windows 2.20 is now available. Pleasecontact us at ceeesa@anl.gov to request a CD.Interface FeaturesWe added icons in the toolbar for the execution of theup-down routine (determines the calculation sequenceduring the simulation) and the actual BALANCEsimulation.The two new icons change color to indicate whetherchanges to the network structure or input data mayrequire executing one or both of the routines.RUN UPDOWNChanges color:Black (status OK)Red (may need torun updown)Run BALANCEChanges color:Yellow (status OK)Red (may need torun BALANCE)LINK WIDTH DISPLAYActive only on sectorlevel; left icon forediting, right icon fordisplayENPEP Modifications 2.20 Page 1

Modeling Algorithm and MethodologyWe have now implementedprice elasticities at the demandnodes. You can choose fromtwo price-demand relationships:linear and nonlinear. Aninteractive help feature quicklyillustrates how the elasticity youspecified will affect the modelresults.The economic cost calculation(NPV) is now fully integratedinto the model. Additional inputsto run the NPV calculations canbe found in the “RunParameters.” You need tospecify the discount rate to beClicking the help buttonillustrates the tworelationships; the graphsin bold-red highlight theeffect of the elasticityentered by the userCenter for Energy, Environmental, andEconomic Systems Analysis (CEEESA)used when calculating the net present value of the total economic system costs as well as the costof energy (electricity) not served. Please contact us for more details and/or the manual for the NPVcalculations.Under Run Parameters, theuser specifies the discountrate and the cost of energy(electricity) not servedThe user can now specify ademand elasticity at eachdemand node; the user canchoose between a linear andnon-linear relationship;the elasticity can be changedevery yearThe Profit Factoraffects the pricecalculations inthe refinery nodeWe introduced a profit factor to the multiple output (refinery) nodes. Specifying a profit factor willchange the prices of all process output products. Please consult the manual or the appropriatetraining materials for more details on the price calculations.We removed some size limitations for network design. The model dimensions, i.e., the number ofnodes in the network, have been significantly increased. Now, you can have up to 999 nodes ofeach node type in BALANCE, with the total number of links being 999.New Reporting FeaturesWe added several new reporting features to the model.The first new report is the “Quick Report.” You will find this feature particularly useful during theinitial case debugging and verification stage, because it allows you to quickly compare modelresults with historical statistics. You start the Quick Report by clicking on the sigma icon in the toolbar. To debug energy flows, please make sure you first select “Quantities” as link overlay. Thereport works the same for emission results. In this case, you must first select “Emission” as nodeoverlay. To use the feature to verify energy results, you click on individual network links to includethem in the report. Selected links are highlighted in red (clicking a link again will de-select it). Thereport window shows the sum of energy flows on all selected links for a given year. BALANCEautomatically updates the value in the pop-up window as links are added to (subtracted from) theENPEP Modifications 2.20 Page 2

Center for Energy, Environmental, andEconomic Systems Analysis (CEEESA)report. Click on “View Trend” to see a graph for the selected links over the entire study period.Graphing options include linesand stacked bars (absolute and100%). You can also look at theresults in tabular format and evenexport the values to a text file forpost-processing in Excel.Another new report type is theCustom Report. You will find thisfeature particularly useful for thefinal stages of your analysis orresult reporting, because it allowsyou to easily set up standardreports (final energy consumptionby sector or fuel type, primaryenergy supply, power sector fuelconsumption, emissions by sectoror fuel type, etc.). Custom Reports are similar to the Quick Reports. One difference is that CustoClicking on View Trendshows a graph and tablefor the selected links(highlighted in red)mReports are permanently stored in the database, while Quick Reports are temporary reports and notsaved anywhere unless you export the results to a text file. Also, Custom Reports are more flexiblein the way you can configure them. You define the reports under “Edit – Custom Reports.” You startthe Custom Reports under “View – Custom Reports.” A pop-up window appears that allows you toselect either an energy report, an emissions report by pollutant, or a cost report. If the report youwant to view spans more than one sector, the model opens all sectors that are part of this report,highlights the links and shows the total for a given year. Click on “Trend” to see a graph for theentire study period. Graphing options include lines and stacked bars (absolute and 100%). You canalso look at the results in tabular format and export the values to a text file for post-processing inExcel.You start theCustom Reportsusing the menu(View - CustomReports)ENPEP Modifications 2.20 Page 3

Center for Energy, Environmental, andEconomic Systems Analysis (CEEESA)A new interfacefeature allows youvisualize energyflows on the networklinks; that is, linksare displayed byusing different linkwidths. Links withlarge energy flowsare displayed withthick lines, whilelinks with small flowsare displayed withthin lines. Thisfeature is designedto help you moreeasily verify modelresults and alsopresent graphical results.Clicking on View LinkWidths gives a quickvisual impression of theenergy flows in the sectorClicking on EditLink Widthsallows to modifythe link rangesWe substantially improved model error reporting. The number of errors reported has increasednoticeably, and all errors are now clearly identified by sector, node, and error type. This allows youto more quicklypinpointpotentialproblems withthe networkconfiguration oryour model input data.In connection with the improved error reporting, we expandedthe validity checks for all model input data. Valid data rangesare now defined for all input fields, and warnings are issued ifyou enter values that are outside the range. Also, in case youadd nodes to the network but forget to enter input data,ENPEP now issues a listof the minimum input datathat are required toexecute the model.Code CorrectionsSeveral code corrections were made with regard to electric units, input limitations, or valid data rangesfor input fields, as well as the case import and export routines. Please contact us if you need moredetails on these corrections.ENPEP Modifications 2.20 Page 4