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phases of solar project

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hello my name is paul cummings i'm the

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director of development for genex solar

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i help genex solar develop solar

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projects in indiana

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that means finding locations for

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projects

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signing land and working through the

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permits after that we work with partners

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to develop to finish out development

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and build own and operate these projects

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today i'm going to be talking to you

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about the different phases of solar

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construction i started out 15 years ago

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looking at digesters on farms worked in

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wind

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landfill gas and now i focus on solar

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let's talk about the different parts of

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the construction of the solar farm

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the construction begins when the site is

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identified

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and the land is then signed up once

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we've identified all the land

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the engineers will look at where the

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different setbacks within that land

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and where they can place panels the

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engineering really kicks off

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with the site survey the site survey

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will delineate all the boundaries

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of parcels it will identify all the

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features on the ground

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and import very importantly it will

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identify the topography of the site

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once the survey is complete and the

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design is complete

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then it's time to begin construction

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this starts with

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the marking of the locations for the

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post the posts

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are actually galvanized i-beams that are

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driven into the ground

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at least eight feet and stick out of the

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ground

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four to six feet once the locations are

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marked

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and the posts are delivered to site they

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can then be

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laid out in their north to south rows

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spaced apart appropriately

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a pile driving machine comes along and

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drives the post into the ground

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once all the posts have been erected

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within an area the torque tubes

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are bolted on top of the posts the

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torque tubes run north and south

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along the rows and they're horizontal to

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the ground and usually off the ground

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four to six feet these provide the

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structure

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to which the panels will be mounted the

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panels are placed in a portrait fashion

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on top of the torque tubes

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every manufacturer varies but there's

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some form a mounting bracket

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that has one or a few bolts that are

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tightened

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to tighten the panels down to the torque

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tube there are hundreds of thousands of

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panels within a solar farm

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a utility scale solar farm

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the bulk of the work is in the racking

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system

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and mounting the panels once the panels

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are mounted

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wiremen come back and wire the panels

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together usually somewhere around 26

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modules are wired in series

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although that can vary up or down a

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couple modules to get to the appropriate

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voltage

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there can be two to four strings per row

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and those strings are wired in parallel

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and taken back to the inverters

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as direct current modern inverters range

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in size from

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two megawatts up to four megawatts or so

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depending on the manufacturer so a 200

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megawatt

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solar farm would need 50 to 100

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inverters placed throughout the solar

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farm

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the direct current wiring is brought to

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these inverters

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and wired into them from there the

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inverter does its magic

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and creates alternating current from

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that direct current alternating current

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is what we use

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in our homes the alternating current is

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then brought from the inverters back to

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the central substation

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which usually is built starts at the

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very beginning of the project is

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a separate project in itself

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the transformer takes the medium voltage

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from the

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inverters and converts it into high

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voltage

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of the transmission line once the

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project is complete

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there is a qa qaqc program so quality

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assurance quality control

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there's hundreds of thousands of

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connections that are made within the

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project

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and these need to be good and tight to

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manufacture

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specifications technicians will check

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and make sure that these meet the

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specifications in addition there's

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electrical

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and communications systems throughout

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the project that need to be checked to

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make sure that they're operating

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appropriately

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once the site passes the tests of the

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qaqc

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it is then free to begin operations at

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that point the construction

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contract is closed out and the

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operations contract begins

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i hope this helps give a high level

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overview of

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a complicated topic that is solar

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project construction

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thanks for taking the time to be with us

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today and if you have more questions

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visit the center for energy education

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website below

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you

Description:

Paul Cummings, Director of Development - Indiana for Geenex Solar, shares the phases of solar project development.

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