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Electric Load Data Input Clarification
- lwkerber
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27 Aug 2016 15:13 #4724
by lwkerber
Electric Load Data Input Clarification was created by lwkerber
I have an an extract from a utility for one year kWh energy in 15-minute time increments. The utility has a time of use and weekday/weekend rate schedule. I understand that:
The first data point is considered January 1 but for weekday/weekend, SAM assumes the first data point is considered a Monday. Correct?
SAM seems to expect data in kW, so I multiplied my 15-minute kWh data by four to approximate kW power before I loaded it. Monthly kWh and kW both looked fine on the "Input Time Series Load Data" screen, but when I did a "Create Report" the "Annual Total Demand" (kWh) was 4 times what the actual demand was in the load file. Peak power was fine.
What am I doing wrong? Is there an easier way to do it?
The first data point is considered January 1 but for weekday/weekend, SAM assumes the first data point is considered a Monday. Correct?
SAM seems to expect data in kW, so I multiplied my 15-minute kWh data by four to approximate kW power before I loaded it. Monthly kWh and kW both looked fine on the "Input Time Series Load Data" screen, but when I did a "Create Report" the "Annual Total Demand" (kWh) was 4 times what the actual demand was in the load file. Peak power was fine.
What am I doing wrong? Is there an easier way to do it?
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- pgilman
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29 Aug 2016 15:05 #4725
by pgilman
Replied by pgilman on topic Electric Load Data Input Clarification
Hello,
Would you mind [url=mailto:sam.support@nrel.gov?subject=15-minute%20load%20data t=_self]emailing me[/url] the file with that load data so I can investigate?
Best regards,
Paul.
Would you mind [url=mailto:sam.support@nrel.gov?subject=15-minute%20load%20data t=_self]emailing me[/url] the file with that load data so I can investigate?
Best regards,
Paul.
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- lwkerber
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30 Aug 2016 19:53 #4726
by lwkerber
Replied by lwkerber on topic Electric Load Data Input Clarification
Sure. What is your email?
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- pgilman
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31 Aug 2016 09:23 #4727
by pgilman
Replied by pgilman on topic Electric Load Data Input Clarification
Sorry -- the term "emailing me" in my reply above should be a link to email me. My email address is sam dot support at nrel dot gov.
Best regards,
Paul.
Best regards,
Paul.
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- pgilman
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31 Aug 2016 10:33 #4728
by pgilman
Replied by pgilman on topic Electric Load Data Input Clarification
Hello,
There is a bug in the PV PDF report template for residential or commercial systems when you use sub-hourly load data. In your case, your file used 15-minute load data, and the report shows a total annual load value four times the correct value.
Here is a link to download a template that corrects the problem:
pv.samreport (82.5 KB)
Replace the template file in your SAM installation with this new template. In Windows, the file is in C:/SAM/2016.3.14/runtime/report. To find the file on a Mac, please see this description of how to display the package contents.)
Thank you for pointing out this problem.
Best regards,
Paul.
There is a bug in the PV PDF report template for residential or commercial systems when you use sub-hourly load data. In your case, your file used 15-minute load data, and the report shows a total annual load value four times the correct value.
Here is a link to download a template that corrects the problem:
pv.samreport (82.5 KB)
Replace the template file in your SAM installation with this new template. In Windows, the file is in C:/SAM/2016.3.14/runtime/report. To find the file on a Mac, please see this description of how to display the package contents.)
Thank you for pointing out this problem.
Best regards,
Paul.
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