Optimization

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Johnson Kuimba
Using SAM to process other renewable sources of energy that are not preset.

Good day,

I would like to match SAM as to process data for a new sustainable energy technology. Its got a high efficiency +95 at 100% load, produces zero, no heat energy is lost, emissions and runs continuously.

I would like to have assistance from the basics as match the technical specifications of the new technology.

Any one willing to assist me in developing this step by step? I am not too familiar with some of the terms and technical inputs needed on the SAM interface needed according to the tech.

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arun.raghu@ttu.edu
System Optimization using SAM

I have a project to do where i need simulate and find the best possible combination of renewable resources at a place for a given load requirements so that i can get the best power output from all the sources. So, is there a way to do this? if yes, can you please help me in how to simulate that?

Thank you
Arun Raghu

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AdamHolmer
AdamHolmer's picture
Peak power not affected when adding PV

My objective is to simulate a commercial building with PV + batteries. As a start, I modelled only PV, and saw that the cost from the demand charge (kW) did not change when PV was added to the building. This is strange, because you could clearly see that the peaks from the grid were reduced in sunny months, such as in July. In July, the building load peak is 185 kW, but the power received from the grid is only 140 kW because of the PV production, when looking at the time series plots. Anyway, the demand charge of $821 is the product of 185 kW times the fee of $4.44/kW and not $140.

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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.

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