[RE-wrenches] Transmitting 15kW 3600ft Off Grid.
Jay
jay.peltz at gmail.com
Mon Jan 10 15:22:22 EST 2022
I have a question about the high voltage transformer costs.
I’ve never sized or costed one out.
What does the 480v vs say a higher voltage one cost? And if you go higher what does that high voltage rated wire wire cost vs 600v?
It’s an interesting question and like someone said, let’s see the costs for the different designs.
I find it hard to believe that a completely new system would pencil out, but then you have a whole new system too vs a bunch of plastic and aluminum in the ground.
Curious where this ends up
Jay
> On Jan 10, 2022, at 1:05 PM, Tump <tump at swnl.net> wrote:
>
> Aluminum wire…….
>>> On Jan 10, 2022, at 2:53 PM, August Goers <august at luminalt.com> wrote:
>>>
>>> 3600 feet is 0.68 miles. That's a long distance. I totally agree with Ray's suggestion that a second system is probably a better option.
>>>
>>> August
>>>
>>>
>>> On Mon, Jan 10, 2022 at 11:49 AM Tump <tump at swnl.net> wrote:
>>>> Hey this is exactly everything I was going to say. Ahh the new owner, the dentist he’s a real piece of work. You got your spring vacation, on him, you got paid and now you want to go back? Hummm lets see installation for a MR. know it all, 500+ miles from home and you’re now going to use a transformer AND all wire on an island in salt water. Wow must be some good smoke. Dan YOU KNOW BETTER!
>>>>>> On Jan 10, 2022, at 8:37 AM, Pieter Huebner <pieter at offgridenterprises.org> wrote:
>>>>>>
>>>>>> It sounds like you are working on an Island near Jones port Maine ( Norton Island). The site had or has a Bergey 7.5kw XL-R wind turbine, on a tilt tower which is almost impossible to tilt, a solar array on a stacked log tower, Kubota generator, flooded cell lead acid batteries and Outback Inverters. Your assessment of the system is 100% correct, bad workmanship, and little or no maintenance. The original design was poorly thought out as well. The poor workmanship was not limited to the energy system, the electrical infrastructure had issues as well. The original installer was in way over his head. I have been to that site at the bequest of the original owner to repair the wind turbine years ago.
>>>>>> My suggestion is that you evaluate the existing equipment and infrastructure, and salvage what you can then start with a fresh sheet of paper. The electrical loads need to be mapped, for example the original owner had a hot tub at the main house.
>>>>>> The site would lend itself well to a micro grid system. if you like we can have long discussions about this site and I will be happy to share what I know about it as well as share my experiences with AC and DC distribution for off grid sites.
>>>>>> Pieter
>>>>>>
>>>>>> <image001.png>
>>>>>>
>>>>>> From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Foxfire Energy
>>>>>> Sent: Monday, January 10, 2022 5:35 AM
>>>>>> To: re-wrenches at lists.re-wrenches.org
>>>>>> Subject: [RE-wrenches] Transmitting 15kW 3600ft Off Grid.
>>>>>>
>>>>>> Hi Guys, Got a good one for you.. We were tasked to refurbish a Stand Alone (aka Off Grid) power system on a 100 acre private resort island off the New England coast a few years back.. The system has a 12kW(AC)/ 48VDC power center (@120/240VAC) with a 10kW Bergey wind turbine, 3kW of Solar and a 12kW Diesel Generator.. It currently powers two main lodges and 10 private cabins.. The system was never installed properly and had significant damage when we got there (no system ground, evidence of several lightening strikes, open/corroded connections, and poor workmanship in general)
>>>>>> The new owners want to build a third lodge at the other end of the island.. Some 3600ft away, and want to feed full power from the existing system to the new lodge.. Thing is, the new owner is pretty brainy (keeps me on my toes).. My first thought was to bump the 120/240VAC up to 480VAC and send it on like 4/0AL and back down to 120/240VAC at the new lodge (we've done it before).. The new owner wants to launder the AC to DC and back for transmission.. Says DC for transmission is the new Cats Pajamas because of the efficiency.. News to me.. Anyone have experience with DC for transmission? Again.. I'm shooting for 15kW (including 25% for continuous duty), 3600ft, 600V wire (but could go with a different wire) and a line loss under 5%. TIA db
>>>>>>
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>>>>>
>>>>> Tump3391 at gmail.com www.SWNL.net
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>>
>> Tump3391 at gmail.com www.SWNL.net
>> Solarwinds Northernlights
>> Serving Mid Coast Maine & Northern California
>> 207-832-7574 Cl. 610-517-8401
>> Blair "TUMP" May
>> ******** MAINE'S CHARTER ********
>> NABCEP "Certified PV Installer"
>>
>> ******** MAINE'S CHARTER ********
>> Trace Xantrex "Certified" Dealer / Installer"
>>
>
>
>
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