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Michael Bishop
Michael Bishop's picture
Commercial load profiles in SAM

Are all 16 commercial building type OpenEI load profiles available through SAM? (Here's the building-type reference at the OpenEI page: https://energy.gov/eere/buildings/commercial-reference-buildings.) If so, where can I specify the building type in the SAM GUI (or via script)? If not, what building type is used in SAM? Thanks!

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Michael Bishop
Michael Bishop's picture
Load profile based on selected weather station

I appreciate that OpenEI load profiles are available in SAM. My understanding is that the load profile on the 'Electric Load' tab is associated with the weather station on the 'Location and Resource' tab. But the 'Electric Load' tab information doesn't change when I select a different weather file on the 'Location and Resource' tab?

My project type is: PVWatts, Commercial. I haven't selected the option to normal load profile to monthly totals. Please let me know if I can give additional information about my SAM setup.

What am I doing wrong? Thanks!

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Achilles11
Payback Period metric for PPA analysis

Hi,
Why doesn't my analysis of a commercial PPA system have payback period as a financial metric output? It does have IRR as an output. The project does involve debt.
Thanks!

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Michael Bishop
Michael Bishop's picture
Replicating SAM production projections in spreadsheet

Since 2005, we've provided a spreadsheet to solar professionals for electric bill modeling (called "The OnGrid Tool"). We're now working to improve the spreadsheet's backend solar production projections and would appreciate your advice.

The spreadsheet currently has kWh/m²/day data for the 239 TMY2 locations (based on the Redbook). It also has hourly distributions for different azimuth/tilt combinations at about 15 different nationally-distributed TMY2 sites, which we got from PVWatts 1.

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Achilles11
Parametric analysis of PV and battery configurations

Hi,

I'm attempting to determine the most financial beneficial configuration of net metered PV and battery capacity. This will be a municipally owned system, so various tax incentives won't apply. Also, the project is half-funded through a federal grant and the other half is a low-interest loan, so to account for the grant funding I've used a negative value (-65%)for the project contingency in System Costs to arrive a portion of the project cost that is covered by the loan.

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Achilles11
PPA Project Debt and Partial Grant Funding

Using PVWATTS Single Owner PPA, the scenario I'm trying to model is a municipally owned 1MW PV system selling power to an electric utility under a PPA. Being a public project, I assume the municipality wouldn't be taxed on revenue, and couldn't depreciate the system, etc. The project is half grant funded and half low-interest loan. I'm trying to figure out the PPA price break-point where the project still makes financial sense.

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ceandra@sandia.gov
Tower height not reported in parametric study

I put together a basic 100MWe power tower. I checked the boxes for Always Optimize and Always layout automatically.

When I run specific cases of various mirror slope errors, the system optimizes and the tower height changes, due to the need of more heliostats (larger field) when poor slope error.

1 post / 0 new
Stefan Troger
HCPV with specific triple junction cell parameters

Hello!

I´m working on a high concentrated photovoltaic project with two-axis tracking system and triple junction cells.
Especially the electrical data and behavior of different on the market available cells are in my interest.

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Michael Russo
Hybrid Solar thermal and Wind turbine system

Hello! I want to use SAM to model the best combination of solar thermal energy and wind energy to heat a water tank. Can the model do this? I was able to get a combined case of solar+wind but the results don't show what energy percentage is solar and what percentage is wind, just the cost reduction when they are both functioning. What am I doing wrong?

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parvindsastry
Over-flux objective penalty factor to be added to SolarPILOT script

Hello! Not a question..

While running the SolarPILOT lk script with the latest version of SAM ( SAM 2016.3.14), the script does not include the Over-flux objective penalty factor.

I just noticed that the Over-flux objective penalty factor is not added in the lk script and the script generates an error.

I added the line in the script and it now works: ssc_var(obj, "opt_flux_penalty", get('opt_flux_penalty'));

This should probably be added to the script on the sample files page.

Just wanted to share this. Thanks

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