Required Solar Power Agricultural Water Pump

Posted by Omar Chaudhry on October 21, 2008, 09:16:14 AM

Required Solar Power Agricultural Water Pump
We are looking for a Solar Energy based solution for agricultural water pumping.
 
Our scenario and requirements are as under:
 
Water Table depth is between 300 to 400 feet. Sunlight is available all year round. In summers the average day time temperature is about 50 C . In winters the night time lowest temperature is upto -3 C .  There is no snowfall in our area in past 100 years history.
Currently we already have electricity run tubewells, some having Centrifugal pumps, whereas soe have turbines , both kinds coupled with electric run motors , with average capacity of 25 HP.
The water output pipe diameter is 6 inches.
 
Does your company have any solution for us:
a.    Existing pumps to run on solar energey based motors.
b.    OR we need to change the pumps as well motors.
c.    Apart from motor and/or pump costs, whats cost of battery pannels, so that the same could be operated at night as well.
d.    In summers, we have season for cultivating rice. You may be aware of large water requirement by rice crop. Therefore for 5 months ( from April to August ) our pumps are running for 20 hours at a stretch.
 
Please advise.
 

Posted by Michel Maupoux on October 22, 2008, 07:19:13 PM

Re: Required Solar Power Agricultural Water Pump (Reply #1)
Hello,

You state that current equipment uses 25HP motors.  Those are very large systems, probably unfit for solar.
To  get an accurate idea of your requirements, you need to say how much water you need per day, and also if the water needs to be lifted further up from ground level.

With a 300-400ft lift (approx 120m), the highest commercially available flow rate I'm aware of with a solar pump would be 3,000 to 5,000 gallons per day (12 to 20m3), with around 2kWp or more of solar panels.

WHich country and latitude/location are you in?  You have very large seasonal temperatures.  Solar pump manufacturers have distributors in many countries but not all.

If you are really talking about 25HP systems and 6 inch distribution pipes, the only approach I would be aware of, would be to build a large solar PV plant with large battery bank and inverter, and using standard industrial AC pumps.

If you have access to the electrical grid and want a hybrid PV+grid system, there is a company in California which has built city systems like that up to 1MW.   I forget their name, but a google search would find them.   Such systems are extremely expensive and require dedicated maintenance.

Cheers,
Michel
 

Posted by Omar Chaudhry on October 23, 2008, 03:36:16 AM

Re: Required Solar Power Agricultural Water Pump (Reply #2)
Dear Michel,
Thanks for your response.
a. Frankly I do not have a correct idea about volume of water required per day. The information which I have is that our existing four (4) water wells, are all running on normal AC grid system. All of these have pumps attached to electric AC motors. The Outflow pipes are of 6 inches diameter, therfore the bore of these wells is of 7 Inches.
b. Once the water is pumped from under-ground, we let it flow into water channels, to irrigate the fields. So there is no need to further lifted from the ground level.
c. My location is Pakistan, city is Lahore. Its Latitude and Longitude are: 31° 35' N  and 74° 20' E .
d. In your post you mentioned a solar solution of capactiy  3000 to 5000 gallons per day. Can you please guide me the the outflow pipe size ?
e. We intend to use the Solar setup during day time only for irrigation. So I think that can we have a setup without the backup batteries ?
Thanks
Omar
 

Posted by Aziz Safi on January 21, 2009, 11:21:08 PM

Re: Required Solar Power Agricultural Water Pump (Reply #3)
Hi,

I am looking for water pump for Agriculture run by solar power, I am working with USAID and world bank if you can
help with latest and best way to find the right product please Email me back, we can do some cool project
Thanks.
 

Posted by Omar Chaudhry on January 23, 2009, 04:02:38 AM

Re: Required Solar Power Agricultural Water Pump (Reply #4)
Mr Aziz Safi,
Please let me know the water requirement from the proposed solar powered water pump.
Whats the location of the site ?  Its latitude & longitude.

Regards.

Omar Sharif Ch
 
Forums | Design by Scratchmedia | Development by SMF.
© 2001-2005, Lewis Media. All Rights Reserved.

Disclaimer and Disclosure

The Alternative Energy Store, Inc reserves the right, within its sole discretion, to refuse or delete any posting or portion thereof, or terminate or block the access to this forum.

The opinions and statements posted on this forum are the opinions and statements of the person posting same, and do not constitute the opinion or act of the Alternative Energy Store, Inc (AltE). The Alternative Energy Store, Inc does not endorse or subscribe to any particular posting. No posting shall be construed as the act or opinion of the Alternative Energy Store, Inc.

Need help selecting solar panels?
Call Us Toll Free!

877-878-4060

Se habla Español
 

top members