Saturday, October 07, 2006

An Important Milestone In Maintreaming Solar Electricity

Last Thursday, in Birmingham, Alabama, an important goal was reached in assuring the mainstream acceptance of solar power.

The accomplishment was the approval of new guidelines (called Acceptance Criteria or AC) by an organization called the International Code Council - Evaluation Services (ICC-ES). This document, AC 365, addresses the safety and performance of building-integrated photovoltaics (BIPV) as a roofing material.

Now, this is all very boring and technocratic. In the big picture, though, it is a huge signal that the PV industry is maturing. It is extraordinarily important that as BIPV is rolled out in ever larger amounts, that it performs the way people expect it to. If sub-par products are being installed, the inevitable failures could cripple the entire industry.

Back in the late '70s and early 80's, badly designed incentive programs resulted in a lot of poorly made solar thermal systems being installed. The subsequent failures set solar energy back 20 years. Given the current state of the world, this cannot be allowed to happen again.

Now before getting into the meat of this, a quick primer is in order here. BIPV are PV modules that are integrated into the building envelope. Thus, they must function as a building material as well as an energy conversion device. AC 365 covers BIPV that is integrated into clay and concrete tile or asphalt shingle roofs. That is, it covers the BIPV products used in most residential new construction. My favorite example (because I designed it) is PowerLight's SunTile.

This type of design is finding a favor among new home builders because the aesthetics are superb as compared to standard "rack and stack" PV systems, with the modules supported above the roof.

Despite builder's enthusiasm for the technology, it is often tempered with concern. Roof leaks are a huge liability for buiders and they seek assurance that the BIPV will be as effective a roofing material as the rest of the roof. Building departments are often even more skeptical. They require proof that these products will be safe in fires, windstorms, and hailstorms; that they won't break if someone walks on them or leak in heavy rains; and will be as durable as other roofing products.

This is where ICC-ES comes in. The International Code Council (ICC) is the semi-public body that writes what are known as model building codes - the International Building Code (IBC) being one example. Building departments then adopt these codes and they have the force of law in those jurisidications. The ICC itself is primarily made up of building code officials and the process of writing these codes is public (though not widely publicized).

ICC-ES deals with products which are not addressed by the building codes -- innovative products that, when local building officials are asked to approve, they scratch their heads. This has been the situation that BIPV installers have faced when trying to pull permits. It requires a lot of education of building officials on the issues, not least because many of the BIPV products on the market may not perform adequately as a roof. AC-365 specifically covers BIPV as a roofing material, and not electrical safety (which is already addressed by Underwriter's Laboratory requirements) or solar performance.

So when ICC-ES releases this draft criteria on January 1st, 2007, this means that there are a standard set of requirements that everyone can go by. Manufacturers can perfom testing, and if successful, obtain an Evaluation Report (ER) that proves to building officials and clients that they comply. This will significantly smooth the permitting process and facilitate the sale of these systems.

The release of this AC is the first step towards the eventual incorporation of BIPV requirements into the International Building Code. Hopefully, these requirements will be written into the 2009 IBC, which will have force of law in many jurisidictions in 2010. At that point, BIPV will be firmly established as a mainstream building material, on par with all other types of roofing.

On a more personal note, I am very happy to have been to be part of this precedant-setting process. I worked closely with ICC-ES staff in writing AC-365. While getting this acccomplished is clearly of great importance to my employer, I was also glad to see that one of our biggest competitors showed up at the meeting and spoke in support of the criteria.

Meanwhile, there are are couple of other very important regulatory issues being resolved at the moment. More on this in a future post.

4 comments:

monique said...

can you guys put things that are actually from the 80's on there now please.

Carl Lenox said...

What do you mean?

sex said...

徵信社
情趣用品
情趣用品
情趣精品
情趣用品
情趣用品
情趣用品
情趣
情趣


威而柔
自慰套
自慰套
SM
充氣娃娃
充氣娃娃
潤滑液
飛機杯
按摩棒
跳蛋
性感睡衣

威而柔
自慰套
自慰套
SM
充氣娃娃
充氣娃娃
潤滑液
飛機杯
按摩棒
跳蛋
性感睡衣


情惑用品性易購
情境坊歡愉用品


免費視訊聊天室
aio交友愛情館
愛情公寓
一葉情貼圖片區
情色貼圖
情色文學
色情聊天室
情色小說
情色電影
情色論壇
成人論壇
辣妹視訊
視訊聊天室
情色視訊
免費視訊

免費視訊聊天
視訊交友網
視訊聊天室
視訊美女
視訊交友
視訊交友90739
ut聊天室
聊天室
豆豆聊天室
尋夢園聊天室
聊天室尋夢園
080聊天室
080苗栗人聊天室
女同志聊天室

上班族聊天室
小高聊天室

sexy said...

情趣用品,情趣用品,情趣用品,情趣用品,情趣用品,情趣用品,情趣用品,情趣用品,情趣,情趣,情趣,情趣,情趣,情趣,情趣,情趣,按摩棒,跳蛋,充氣娃娃,情境坊歡愉用品,情趣用品,情人節禮物,情惑用品性易購,A片,視訊聊天室,視訊,視訊聊天,視訊交友網,免費視訊聊天,聊天室,UT聊天室,免費視訊,視訊交友,免費視訊聊天室

免費A片,AV女優,美女視訊,情色交友,免費AV,色情網站,辣妹視訊,美女交友,色情影片,成人影片,成人網站,A片,H漫,18成人,成人圖片,成人漫畫,情色網,日本A片,免費A片下載,性愛

A片,色情,成人,做愛,情色文學,A片下載,色情遊戲,色情影片,色情聊天室,情色電影,免費視訊,免費視訊聊天,免費視訊聊天室,一葉情貼圖片區,情色,情色視訊,免費成人影片,視訊交友,視訊聊天,視訊聊天室,言情小說,愛情小說,AIO,AV片,A漫,av dvd,聊天室,自拍,情色論壇,視訊美女,AV成人網,色情A片,SEX,成人圖片區

情趣用品,A片,免費A片,AV女優,美女視訊,情色交友,色情網站,免費AV,辣妹視訊,美女交友,色情影片,成人網站,H漫,18成人,成人圖片,成人漫畫,成人影片,情色網


情趣用品,A片,免費A片,日本A片,A片下載,線上A片,成人電影,嘟嘟成人網,成人,成人貼圖,成人交友,成人圖片,18成人,成人小說,成人圖片區,微風成人區,成人文章,成人影城,情色,情色貼圖,色情聊天室,情色視訊,情色文學,色情小說,情色小說,臺灣情色網,色情,情色電影,色情遊戲,嘟嘟情人色網,麗的色遊戲,情色論壇,色情網站,一葉情貼圖片區,做愛,性愛,美女視訊,辣妹視訊,視訊聊天室,視訊交友網,免費視訊聊天,美女交友,做愛影片

av,情趣用品,a片,成人電影,微風成人,嘟嘟成人網,成人,成人貼圖,成人交友,成人圖片,18成人,成人小說,成人圖片區,成人文章,成人影城,愛情公寓,情色,情色貼圖,色情聊天室,情色視訊,情色文學,色情小說,情色小說,色情,寄情築園小遊戲,情色電影,aio,av女優,AV,免費A片,日本a片,美女視訊,辣妹視訊,聊天室,美女交友,成人光碟

情趣用品.A片,情色,情色貼圖,色情聊天室,情色視訊,情色文學,色情小說,情色小說,色情,寄情築園小遊戲,情色電影,色情遊戲,色情網站,聊天室,ut聊天室,豆豆聊天室,美女視訊,辣妹視訊,視訊聊天室,視訊交友網,免費視訊聊天,免費A片,日本a片,a片下載,線上a片,av女優,av,成人電影,成人,成人貼圖,成人交友,成人圖片,18成人,成人小說,成人圖片區,成人文章,成人影城,成人網站,自拍,尋夢園聊天室