More info on LADWP's systems [RE-wrenches]

[Keith Cronin]

Hello Chris and all

It is clear from the photo's that ladwp wants a European look and
doesn't want to pay for it. If they are immersing art with energy, then
the energy piece should be in the back seat and not driving the project.
They had dead links to their "calculate the payback" link on the web.
Perhaps this is due to their curb appeal as opposed to correct
orientation in relation to the payback concept, which skews they
numbers. You can't make it real on a round building, unless it is
tracking the sun....!!
This will plague the nation. Like Chris Freitas' rendition of the
Bellagio's fountain consumption recently. Vegas is the tumor of the
energy world. The amount of energy spent keeping that place lit is
pathetic.  People expect the illusion of free energy at the cost of
writing a check to their local utility and forget about the
consequences. I am always amazed at the mentality of the "average"
American when it comes to energy and their reality. Live in Hawaii and
see the travesty. Even at .16 per KWH, people don't give a rip. Buy a
new refrigerator....c'mon..this one has served me well for the last 13
years...syndrome... Mitigation is not in the vocabulary.

Anyway....a further option for this group...to have an independent
entity check the validity of system performance...via the web....and
some CT's that are calibrated for analog performance. If your clients
have DSL or Road Runner in your area, this is the way to go. Don't count
on the local utility or your manufacturer's products for verification.
Have a third party examine you data and publish it for verification.
Contact me off list if you are intrigued. I wish the best for this
industry and am embedded in its florishment and survival. In Hawaii, it
seems like a natural transition. Yet places like NJ have more incentives
than here. It appears like crisis intervention again. When will society
wake up and smell the roses....not until it is .30-.40 per KWH...and
lets add 2 cents per KWH for the Iraq concept....

Super rant .......

Aloha



Keith Cronin
President
Island Energy Solutions Inc
318A Kuulei Rd
Kailua, HI 96734
808-262-3268 Tel
808-263-0338 Fax
www.islandenergy.net
 

-----Original Message-----
From: Christopher Freitas --- OutBack Power
[mailto:cfreitas at outbackpower.com] 
Sent: Sunday, January 04, 2004 8:23 PM
To: RE-wrenches at topica.com
Subject: Spam Alert: More info on LADWP's systems [RE-wrenches]

I did some searching on the 'net and found the necessary information to 
understand their performance expectations.  

This is taken from a LADWP's site at:

     http://www.ladwp.com/ladwp/cms/ladwp004165.jsp 

There also are some good photos of the mounting structures and module 
tilt angles - the structures are about the most expensive module 
mounting system I could ever imagine (each module is on its own 
individual welded support which is then tied into another support beam. 
Gee - you think that could be some of the reason they paid so much??? On

two of the systems the modules are extremely low tilt - and on another 
the structure itself shades the PV modules during much of the day...  

------------------------------------------------------------------

Projects completed to date

LA Convention Center

LADWP constructed a 400kW solar photovoltaic system at the LA Convention

Center. Phase 1 of the project is a 150kW system on the South Hall 
Canopy.

Cherry Street Parking Garage

Phase 2 of the LA Convention Center is a 250kW car shade on the roof of 
the Cherry Street Parking Garage. The system produces 800,000kWh of 
electricity per year, or enough electricity to power over 100 homes.

LADWP John Ferraro Office Building Vehicle Shade

The 150kW system located at the LADWP downtown General Office Building 
is a multipurpose structure: it generates electricity, provides shade 
for cars and houses the electric LAX shuttle van quick-charger. The 
system produces 275,000kWh per year, which is enough electricity to 
power over 30 homes.

-------------------------------------------------------------------

So the 250kW rated system is expected to produce 800 megawatt-hours of 
power per year.  Let's see what that means:

800 MWH per year / 365 days = 2.19 MWH per day = 2,190 kWH per day

2190 kWH per day / 250 kW system = 8.76 peak sun hours per day - every 
day! no clouds allowed!  


The 150 kW system is expected to produce 275 megawatt-hours - so:

275 MWH per year / 365 days = 750 KWH per day

750 kWH per day / 150 kW system = 5 peak sun hours per day... every day!

no clouds allowed!  

BTW - they are assuming a house has about 900 watts of continuous load -

resulting in annual consumption of 8 megawatts per house.  

Christopher Freitas
OutBack Power Systems, Inc.
cfreitas @ outbackpower.com  
www.outbackpower.com
Arlington WA USA
Tel 360 435 6030  

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