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NREL is a national laboratory of the U.S. Department of Energy
Office of Energy Efficiency and Renewable Energy operated by the
Alliance for Sustainable Energy, LLC
The Solar Advisor ModelVersion 2009 Details
Nate Blair
Aron Dobos
Mike Wagner
October 30, 2009
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Contents
- Program Organization- New Model Additions
- Simulation Setups
- Graphing Capabilities
2National Renewable Energy Laboratory Innovation for Our Energy
Future
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Benefits of having rewritten SAM from the ground up:
Significantly faster and runs on a Mac
Incorporates a Monte Carlo method for uncertainty analysis
Sensitivity and Optimization simulations
Provides a framework to eventually allow SAM to run as a web
application Allows easy interaction with tools and languages,
including Excel
and MATLAB
Easier maintainability in the future because of new
softwarearchitecture
SAM User Language SamUL scripting language Allows greater
interaction with risk-assessment tools such as
@Risk and CrystalBall and stochastic analysis
Integrated Web Update capability
Advantages of SAM 2009
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SAM 2009 Block Diagram
SAM SIM
(Simulator)
Hourly Simulation
Financial Model
Communication(C DLL API)
SAM GUI
Output Metrics:
LCOE, IRR, NPV,Capacity Factor
SimulationManagement:Parametrics,Optimization,Multi-Systems
Graphing ofSensitivities
Inputs:Parameters
CostsIncentives
MATLAB Excel/VBA
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PV Additions in SAM 2009
-Simple efficiency model:multi-radiation level
efficiency model
- PVWatts with basicbattery storage model
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Battery Storage Option Beta
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SAM Simulation Setups
Parametric analyses
Ability to assign many values to input variables
Variables values can be linked to track together
Excel Exchange
Interact with external Excel files on the fly
New in SAM 2009
Sensitivity analyses (demo)
Optimization (demo)
Statistical / Uncertainty
Multiple Systems
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Sensitivity Analysis
- Helps determine howsensitive an output
metric is to variation in
inputs
- Results for each
sensitivity variable are
calculated
independently
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Uncertainty Analysis
- Allows user to specify an uncertainty distribution for
input variables and observe the effect on outputs
- Next release will incorporate Latin Hypercube
Sampling (Sandia) to reduce number of runs needed
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Multiple Systems
- Aggregates performance results from multiple
subsystems and runs a unified financial model
- Costs for each subsystem are also combined
- Example: PV systems where some modules face
east and others south
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Links to an External Workbook
SAM Inputs
SentTo
Excel
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CapturedFrom
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SAM User Language (SamUL)
User request to be ableto run hundreds or
thousands of SAM runs
(i.e. all TMY3 in US)
Scripting language
much like VBA but
tailored to SAM
Documentation and
sample files available to
help get started.
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Graphing
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Live Demo!
[email protected]://www.nrel.gov/analysis/sam
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Thank you!
[email protected]://www.nrel.gov/analysis/sam
15N ti l R bl E L b t I ti f O E F t
