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#1
Start by
Nebcin Varghese
12-29-2013 05:18 AM

Solar panels for office with 7800 KW power consumption

Dear Professionals...i am making a feasibility study on using solar panels for our office. It is a small size office which only has 7800 KW power consumption annually....can anyone help in the design?
12-29-2013 07:20 AM
Top #2
Georgi Shtebunaev
12-29-2013 07:20 AM
Dear nebcin varghese

Easy questions - no have easy answers.
I'll need more information.

1. Where is your office? The most well-coordinates.
2. What you want to do - to use only solar power - off grid or to help the grid?
3. These 7,800 kwh - are distributed equally throughout the year?
4. If the system is off-grid - what voltage your appliances work? Can operate on 12 or 24 volts?

If you want my e-meil is yhoro22@gmail.tsum
Have a nice evening
12-29-2013 10:11 AM
Top #3
Nebcin Varghese
12-29-2013 10:11 AM
dear sir,

1. our office is in dubai, united arab emirates. Coordinates approximately would be 25.2697° N, 55.3095° E
2. we need to use an off grid solar system. as i told you...this is only a feasibility study as a part of a project
3. 650 KW/month is the peak summer load. as u know summers are harsh here and normally all appliances (be it cooling or electrical) are designed on 52 C (125F). This isncludes all appliances including chillers, machines i the factory etc.
4.The power supply in UAE is either single phase (230V/1Ph/50Hz) or 3 phase (380-415V/1Ph/50Hz). So some appliances work on single phase and some on 3 phase depending on thier electrical load. for example, chillers work on 3 phase and lighting on single

I hope these answers are inline with your queries
12-29-2013 01:04 PM
Top #4
Dilip Joshi
12-29-2013 01:04 PM
Pl. state your usuage in kwh per day so as to design solar system. Pl. confirm you want to go for off grid or on grid. In case of Off grid, what is the storage period required so as to design battery . Pl. convey at jdilip52@yahoo.com
12-29-2013 03:36 PM
Top #5
Georgi Shtebunaev
12-29-2013 03:36 PM
Dear Nebcin Varghese

These data are sufficient for preliminary design - conceptual Project.
Just think:
7800/12 = 650 kW
it's average consumption per month. Can you say summer - how Max month.

Georgi Shtebunaev
12-29-2013 05:38 PM
Top #6
Nebcin Varghese
12-29-2013 05:38 PM
the peak load remains for around 6 months..the load in another 3 will not vary much even though it is not summer......by the way...i am into HVAc and solar is pretty new for me....i appreciate if you could help me with the formulas or any articles available online on how to design
12-29-2013 07:51 PM
Top #7
Travis Cagle
12-29-2013 07:51 PM
If solar is new to you, I would not tackle an off-grid design. Besides allowing for the steady demands over time, and allowing for the seasonal and usage peaks, there are surge demands to be met and questions about days of autonomy, amount of maintenance you can provide and so on. If you contact me privately, I can help you work on this one.
12-29-2013 10:48 PM
Top #8
David Ford, PE
12-29-2013 10:48 PM
I am also new to PV systems and want to get up to speed as fast an possible. These discussions help a lot. Is there anywhere I should look for technical info.
12-30-2013 01:24 AM
Top #9
Travis Cagle
12-30-2013 01:24 AM
NABCEP classes are the best, community college, depending on the level of depth you're looking for. If you just need the basics, Solar for Dummies is surprisingly good, if you can ignore the title. That can be found with a Google search and downloaded as a .pdf.
12-30-2013 03:50 AM
Top #10
Travis Cagle
12-30-2013 03:50 AM
Again, if you're wanting to design and build off-grid solar, just bite the bullet and get a pro to do it. I was in TX and didn't find that many people who could do it right. We could.
12-30-2013 06:31 AM
Top #11
David Ford, PE
12-30-2013 06:31 AM
Travis,

We have a pro but I want to learn as much as possible as fast as possible. We're in this thing for the long haul.
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