Salovich Zero+ Campus Design Project
Salovich Zero Plus Campus Design Project


Zero+ Calculator

The "Zero+ Calculator” is an Excel spreadsheet calculator developed for use by students, staff researchers, facilities managers and designers. The Z+ Calculator can be used to assess early design planning for new and existing building alterations on the University of Minnesota Campus. The tool can easily be adapted to any campus or group of buildings where current energy and water usage data are available. It is intended for early stages of project planning and design; however, it is also useful for a variety of cost-benefit and feasibility evaluations relating to future or hypothetical upgrades. The tool is designed so that is can be used as a stand alone evaluation tool or in concert with other Zero+ Tools such as the Zero+ Shoebox Model Maker and/or Integrated Environmental Solutions <Virtual Environment> (IES VE-Pro) software. The screen capture images below provide a tour of the basic interface, features, and output results of the Z+Calculator.


Step 1 Step2
Step 1: The opening screen with instruction manual and color key. Step 2: The calculator accepts manual "copy and paste" of data from IES VE Vista for up to three building design cases. The simulation results can be for full-year simulation in Apache or for half-year seasonal simulations.



Step3 Zero+ Calc Project Input2
Step 3: The user can choose from available building types and existing campus buildings or begin with a "generic" building of a certain occupancy type. The calculator automatically fills in baseline performance data from the UMN campus building database stored in the calculator. Step 4: Baseline data is repopulated whenever a new building is selected. Various energy conservation measures can be selected and performance levels set for lighting technology,envelope and glazing specs, living envelopes, advanced envelope (such as double skin facade and trombe walls), a variety of high performance HVAC systems, and ventilation strategies.  As the building performance changes the overal energy use, energy cost, and lifecycle cost analysis data update for each design case.



Zero+ Calc Project Input LCCA Zero+ Calc Project Input RE
Step 5: As stragies are selected and performance levels set, the resulting energy cost savings and capital, operation, and maintenance costs are agregated to provide financial and life-cycle cost benefit indicators such as Net Present Value and Internal Rate of Return (IRR). Step 6: Renewable energy systems can be selected and RE targets set to size these systems and evaluate system feasibility. Throughout the process, design guidance is provided and warnings are presented if the user selects design parameters that are not possible within the context of the given project parameters.



Zero+ Project Input Summary Zero+ H2O Calc
Step 7: Water use, rainwater capture, wastewater treatment, and runoff performance is assessed based on strategies determined in the Water Calculator. Step 8: Detailed water performance and comparative analysis are accessible in the Water Calculator worksheet.



Zero+ Summary Zero+ Summary2
Step 9: Summary of comparative performance metrics for baseline and design cases. Step 10: Various comparative outputs are available including average monthly loads breakdown for each building design case as compared to the baseline.