Model Technical Details

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YK
generating the Pmp, Vmp, Imp

Hi,

Is there a way to generate the Pmp, Vmp, Imp ... directly from the CEC Modules.csv and not via SAM UX-> Generate Code?

Thanks
Yoav

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danjhealy1@gmail.com
Location and Interval Load Data Errors

Hi Guys,

I've gone through your webinars and followed your steps pretty closely. I'm getting a bunch of errors when I go to run a simple PVWatts, commercial simulation. I believe the errors are caused by two of my own inputs, as when I use the inbuilt inputs I do not get the same errors.

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Pia Rodriguez
Load Profile in SAM

Can SAM work with a hourly utility load profile and see how is it affected by PV generation and Storage?
Thanks,

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Ismael
LCOE inconsistency, Cash Flow

Hi, I'm simulating a 100 MW central receiver CSP plant (without TES). In the "Summary" of results, SAM tells me that the resulting nominal LCOE is 26.02 cents / kwh, which coincides with the information shown in the "Cash Flow" tab. However, if I check the detail of the cash flow with the "Send to Excel with Equations" tool, it turns out that the nominal LCOE shown is 29.44 cents / kwh.

1 post / 0 new
Ismael
LCOE inconsistency, Cash Flow

Hi, I'm simulating a 100 MW Power Tower CSP plant (without TES). In the "Summary" of results, SAM tells me that the resulting nominal LCOE is 26.02 cents / kwh, which coincides with the information shown in the "Cash Flow" tab. However, if I check the detail of the cash flow with the "Send to Excel with Equations" tool, it turns out that the nominal LCOE shown is 29.44 cents / kwh.

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Michael La Marca
Modeling DC Optimizers with Multiple MPPT Feature

I would like to model the following residential system that uses a string inverter with DC Optimizers:

Modules: QCells Q.Peak BLK-G4.1 295 (295W Monocrystalline 60 cell module)
Inverter: SolarEdge SE5000H HD Wave Inverter (so could use SE5000H-US [240V] 240V [CEC 2018] in SAM
DC Optimizer: SolarEdge P350 Optimizer

The configuration is:

Array 1: Tilt 20, Azimuth 180 - 16 modules on string all with P350 Optimizer
Array 2: Tilt 30, Azimuth 270 - 6 modules on string all with P350 Optimizer

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FrankNam
FrankNam's picture
SAM TES dispatch w/solar

Good day Paul

I trust all is well. I had a pleasant time with Craig and Mark at SolarPaces. You weren't there were you?

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FrankNam
FrankNam's picture
W/o solar power output difference

HI all

I am having trouble with results from the same model but two different input weather files. The one I run with meteonorm data for a location, the other I run with ground measured data entered into an existing SAM resource library file. (any advice on doing this the "right way" would be appreciated).

Please see the graphs attached. Can anybody explain why the meteonorm profile is higher during night-time operation than the ground-measured data night time operation?

Thanks
Frank

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FrankNam
FrankNam's picture
Parasitic power solar field HTF pump electrical power usage

Hi Paul and team

Simple question about the Parasitic power solar field HTF pump electrical power usage. I have had a look through the forum, the help file and the physical trough report. I am battling to find how this parasitic demand is calculated. In my results, the value rarely exceeds 1.3 MWe, which is way too low. Most plants I have seen in SA have installed capacities of around 3x 2 MW or more.

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FrankNam
FrankNam's picture
Cooling tower water use results_reply

Hi Paul

Thanks for the support.

From the Equation 3.25 of the Physical Trough Reference Manual, could you please indicate which value is being reported in the time-series results of SAM as "Hourly Data: Cycle cooling water mass flow rate - makeup (kg/hr)",i.e. is it mdotwater or mdotcw?:
mdotevap = qdotrej/hevap
mdotdrift = fdrift mdotcw
mdotctbd = fctbd mdotcw
mdotwater = mdotevap +mdotdrift +mdotctbd

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