Re: [RE-wrenches] Irradiance data
Drew, Aside from getting the weather data for weather-adjusted performance calcs, you might also note to your client that the excessive snowfall has skewed performance even further. One of our projects just outside of NYC had a pyranometer that would be clear of snow the day after a storm and therefore showing say 400 or 500 watts/sq meter irradiance at the site. Meanwhile there was a foot of snow on the array! I suppose we should move the pyranometer down to the module height so that it doesn't clear of snow any sooner than the modules. It might also be comforting to point out that a 10 degree pitched system in Newark NJ could be down 100% in January and that's still only 5% for the year. If it starts snowing in July, then we have more problems than lost PV production. David Buckner Solar Energy Systems www.solaresystems.comhttp://www.solaresystems.com From: re-wrenches-boun...@lists.re-wrenches.org [re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Andrew Truitt [atru...@gmail.com] Sent: Wednesday, March 03, 2010 10:35 AM To: RE-wrenches Subject: [RE-wrenches] Irradiance data Is anyone aware of a resource for finding local historical irradiance data? We've had a cloudy winter around the DC Metro area and I would like to quantify how far down we are from the average for new customers concerned with production. Thanks in advance, Drew -- Don't get me wrong: I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it's wireless! ~William McDonough ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Irradiance data
Aloha Folks: NREL had a book list order form years ago (which you could download online), and you could check any of the books you wanted, and they would send them to you for free! This irradiance data book was one of the free books I got at the time, plus others on BIPV and other topics. I actually ordered multiple sets of these for friends and co-workers. I don't know if that deal is still around. The same irradiance data has been published in Ed Mazaria's 'Passive Solar Energy Book.' From the 70s. Nick Soleil Project Manager Advanced Alternative Energy Solutions, LLC PO Box 657 Petaluma, CA 94953 Cell: 707-321-2937 Office: 707-789-9537 Fax:707-769-9037 From: Andrew Truitt atru...@gmail.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Wed, March 3, 2010 10:57:56 AM Subject: Re: [RE-wrenches] Irradiance data David - Thanks! This is great as an average for comparison. Any thoughts on where I could get data specifically from 2009 or the last couple of months? On Wed, Mar 3, 2010 at 10:52 AM, David Brearley david.brear...@solarprofessional.com wrote: Look for a super comprehensive article on the topic of production modeling in the Apr/May issue of SolarPro (SP3.3) by Tarn Yates and Bradley Hibberd of Borrego Solar. It includes information on TMY (typical meteorological year) data, like that published by NREL here: http://rredc.nrel.gov/solar/pubs/redbook/ David Brearley, Senior Technical Editor SolarPro magazine NABCEP Certified PV Installer ™ david.brear...@solarprofessional.com On 3/3/10 9:35 AM, Andrew Truitt atru...@gmail.com wrote: Is anyone aware of a resource for finding local historical irradiance data? We've had a cloudy winter around the DC Metro area and I would like to quantify how far down we are from the average for new customers concerned with production. Thanks in advance, Drew ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- Don't get me wrong: I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it's wireless! ~William McDonough ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Irradiance data
David - Thanks! This is great as an average for comparison. Any thoughts on where I could get data specifically from 2009 or the last couple of months? On Wed, Mar 3, 2010 at 10:52 AM, David Brearley david.brear...@solarprofessional.com wrote: Look for a super comprehensive article on the topic of production modeling in the Apr/May issue of SolarPro (SP3.3) by Tarn Yates and Bradley Hibberd of Borrego Solar. It includes information on TMY (typical meteorological year) data, like that published by NREL here: http://rredc.nrel.gov/solar/pubs/redbook/ David Brearley, Senior Technical Editor *SolarPro* magazine NABCEP Certified PV Installer ™ david.brear...@solarprofessional.com On 3/3/10 9:35 AM, Andrew Truitt atru...@gmail.com wrote: Is anyone aware of a resource for finding local historical irradiance data? We've had a cloudy winter around the DC Metro area and I would like to quantify how far down we are from the average for new customers concerned with production. Thanks in advance, Drew ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- Don't get me wrong: I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it's wireless! ~William McDonough ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Irradiance data
You might check in with the monitoring companies you work with to see if they can pull up the data from one of your sites with an irradiance meter. You might already have this in an admin view. If not, maybe someone on this list does. NREL or Sandia may also collect this data on an ongoing basis. While I¹m not sure who you¹d contact, there are extensive resources listed at the end of the Production Modeling article in SolarPro. That issue will post online this week start mailing very soon. I also suspect 3TIER has the data you want (http://www.3tier.com/en/), but I¹m not sure they¹d give it away. Since you¹re not planning on making money with the data, maybe they¹ll share. Doesn¹t hurt to ask... On 3/3/10 12:57 PM, Andrew Truitt atru...@gmail.com wrote: David - Thanks! This is great as an average for comparison. Any thoughts on where I could get data specifically from 2009 or the last couple of months? On Wed, Mar 3, 2010 at 10:52 AM, David Brearley david.brear...@solarprofessional.com wrote: Look for a super comprehensive article on the topic of production modeling in the Apr/May issue of SolarPro (SP3.3) by Tarn Yates and Bradley Hibberd of Borrego Solar. It includes information on TMY (typical meteorological year) data, like that published by NREL here: http://rredc.nrel.gov/solar/pubs/redbook/ David Brearley, Senior Technical Editor SolarPro magazine NABCEP Certified PV Installer david.brear...@solarprofessional.com http://david.brear...@solarprofessional.com On 3/3/10 9:35 AM, Andrew Truitt atru...@gmail.com http://atru...@gmail.com wrote: Is anyone aware of a resource for finding local historical irradiance data? We've had a cloudy winter around the DC Metro area and I would like to quantify how far down we are from the average for new customers concerned with production. Thanks in advance, Drew ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
