TAMPA, Fla. (PRWEB) February 19, 2008
TAMPA, Fla. (PRWEB) February 19, 2008
San Diego, CA (PRWEB) November 25, 2009
“Modularity is indeed a big factor in CPV’s favour”
Interview with University of Nevada Las Vegas’ Robert Boehm – speaker at the 2nd Concentrated Photovoltaic Summit US, February 2-3 2010
Given the recent and limited field experience with CPV systems, it is almost impossible to define the minimum requirements that the products must fulfil regarding performance reliability and safety.
It is obvious that if CPV is trying to compete against conventional photovoltaics, it should have, at least, the same requirements as conventional PV. For instance, reliability and durability offered by CPV systems must be at least as high. It is difficult to gather information about reliability and durability experiences in CPV systems, as most of them are still in a prototype phase; so, the field experience is limited. Those difficulties get worse because the companies involved in concentrating photovoltaics are reluctant to share their achievements and difficulties due to market strategies and research confidentiality, as highlighted by CPV Today in its report, Achieving Grid Parity, released earlier this year.
There is a premium cost on CPV, but the differential in cost is becoming smaller, says Robert Boehm, Professor of Mechanical Engineering and Director of the Energy Research Centre, University of Nevada Las Vegas.
Both the increased efficiency of cells generally, their efficiency increase with concentration, and the ability to access more sunlight in a day are helping narrow this cost, according to Boehm, who is scheduled to speak at CPV Today’s 2nd CPV Summit US, to be held in San Diego (December 2-3) this year. While some thin film technologies are becoming increasingly cost competitive in the field generally, these require quite a larger footprint for the same generation. In some markets this will not be a negative aspect for thin film, but in some it may be quite critical, added Boehm.
Boehm spoke to CPV Today about the possibility of cost reduction in case of CPV and other technologies such as thin-film and CSP. Excerpts:
CPV Today: CPV cost reduction roadmap forecasts that the initial investment will drop down to 2500 €/kWp in the short run upon the assumption of a rapidly increasing manufacturing volume together with a learning factor of 15% (Nishikawa and Horne, 2008). The EU Photovoltaic Technology Platform agrees on this figure and envisages that this dramatic decrease will take place by 2010. What do you make of such projections?
Robert Boehm: This trend is a definite reality. It has certainly been the case that CPV manufacturers have been developing their systems one or two units at a time. I also know that many are moving toward modern manufacturing techniques with the use of robotic elements and other approaches that will significantly decrease their cost of manufacture.
CPV Today: The cost per kWp of thin-film modules is lower than those of conventional wafer-based silicon modules and CPV systems. Additionally, their appearance makes them attractive to many people and especially suitable for the built environment. However, less efficiency (as it is the case for thin-film) means more module area, entailing more costs in supporting structures, wiring, concrete and the like. This is why, in the end, the LEC of flat-plate thin-film may be considered equal to that of static c-Si. What kind of support do you think CPV industry needs at this stage to compete?
Robert Boehm: I think that as CPV is developing the characteristic of less expensive manufacturing costs, as well as decreased cost of installation… this is quite positive. Market stimulation with the use of RPS and tax incentives will move the industry considerably along this pathway to lower costs. With the potential of developing higher and higher efficiency cells, the HCPV approaches will become overall much less expensive. Also to be noted is the development of low concentration systems which show their own good characteristics.
CPV Today: Would it be right to say that only scale and large scale power plants are key success drivers for CPV?
Robert Boehm: That is my feeling generally. However, roof-mounted, low concentration PV systems will find a good application on large flat roofed buildings. These can probably be installed either during building construction or as a retrofit without the need to modify the basic building design.
CPV Today: What do you make of advantages of CPV over CSP? For instance, CPV displays a higher degree of modularity than CSP. This means that it is easier to gradually expand the capacity of a CPV plant than it is in the case of CSP. Also, do you think there is more scope for cost reductions in CPV than in CSP?
Robert Boehm: The modularity is indeed a big factor in CPV’s favour. Also the greatly enhanced efficiency benefits (with promise of potential improvements of this aspect) of HCPV over CSP is another factor. The one CSP technology that is closest competitor to CPV is the dish Stirling approach on both accounts. However, this technique brings with it a potential enhanced requirement for maintenance efforts. Of course, some CSP technologies give short term solutions to energy storage not available to either the dish Stirling or CPV approach. Minimising the use of water may also be a factor in some decisions between CSP and CPV. Even if water is required only for cleaning, the higher efficiency of many of the CPV approaches will require less water per unit of output.
CPV Today: Initial investment costs are currently higher in CPV installations if compared with parabolic trough CSP technology. CPV has a higher sensitivity to clouds. The lack of clear radiation affects more negatively in CPV than in CSP performance. How do you think CSP scores over CPV?
Robert Boehm: Yes, CPV does suffer more severe transient effects compared to trough technology. The latter has the inherent stability of long fluid transit times that offer some ability to smooth short transients. Trough plants offer the possibility of more easily incorporated longer-term storage. These are two big issues facing CPV in that head-to-head comparison. However, with costs of CPV coming down and performance increasing, CPV will compete well on other bases.
Boehm is scheduled to speak at CPV Today’s 2nd CPV Summit US, to be held in San Diego (February 2-3 2010).
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Nashville, Tenn. (PRWEB) January 21, 2010
Every day in February can feel like Valentine’s Day at Gaylord Hotels, courtesy of the brand’s Remember Romance package. Available throughout February, the Remember Romance package, priced from $ 242* per night, embraces amenities, sensuous experiences and special values that will result in a memorable couples’ getaway.
“We know it’s more difficult than ever for people to find time amid their busy schedules to share truly romantic moments,” said Rich Maradik, senior vice president and chief marketing officer of Gaylord Hotels. “Even still, our leisure guests tell us that celebrating life’s moments is now more important than ever. As a result, we’re offering our Remember Romance package throughout the entire month of February, making it easier for couples to enjoy an intimate getaway at any of our four unique hotels.”
The Remember Romance package is available throughout the month of February and includes:
One or two night(s) room accommodations;
A romantic welcome amenity which includes champagne and either fresh strawberries or delectable, iced cake balls;
Daily breakfast for two;
Twenty-percent discount on select spa services at Rel
Las Vegas, NV (PRWEB) February 15, 2011
Guilbert Express, a European company specialized in developing high quality heating tools for the Building, Roofing and Agriculture markets will be presenting its range Ultra Light of Roofing Torches and Sheet Metal Soldering Irons at the International Roofing Expo 2011 in Las Vegas. The International Roofing Expo is the largest roofing industry gathering for roofing contractors, manufacturers, builders, remodelers, facility managers, and architects and provides a comprehensive preview of the roofing construction newest developments.
During the Expo, Guilbert Express will showcase their Ultra Light Stainless Steel and Titanium Express Roofing Torches. Half the weight of the traditional torches and more durable because of the use of very strong, but light titanium and stainless steel material, the Express Roofing Torches offer the professional roofer increased productivity, lower level of strain and easier handling. The Stainless Steel and Titanium Express Ultra Light Express Roofing Torches are available in several models, with varied ranges in burner output up to 500,000 BTU’s, flame lengths reaching 40 inches and several different torch tubes lengths for smaller detailed work or large roofing projects.
“We believe we have one of the most durable roofing torches on the market which are also light and easy to handle,” said Philippe Guilbert, CEO of Guilbert Express. “We are excited to present our products to industry experts and attendees of International Roofing Expo and look forward to receive their feed-back firsthand on this new range of products.”
For more information on the Express Roofing Torches and the Express Soldering Irons, please visit Guilbert Express at the International Roofing Expo, in Hall 2100 – Stand 2141 in the Las Vegas Convention Center or visit http://www.guilbert-express.com.
About Guilbert Express:
Guilbert Express offers a wide range of heating tools for the Building, Roofing, Agriculture and DIY markets including Express Soldering Irons, Titan’s Express and Stainless Steel’ Express roofing torches and the Express Dehorner. With nearly seven percent of sales dedicated to Research and Development and over 60 patents, Guilbert Express has been recognized worldwide as a provider of high quality and innovative heating tools, which are available in all 5 continents. For more information on Guilbert Express products, please visit http://www.guilbert-express.com.
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South Carolina (PRWEB) January 10, 2008
From tales of Brer Rabbit to fish-laden gumbo stews, the Gullah culture of South Carolina’s Lowcountry and nearby coastal areas has become part of the fabric of America and continues its influence today. This February, in honor of Black History Month, South Carolina is celebrating the Gullah culture – the most culturally distinctive African American population in the United States – with a variety of special events and attractions.
For centuries, the imprint of West African traditions from story telling to cooking was carried over the Atlantic by the thousands of Africans who were brought to the New World as slaves. Though most of each day was spent fulfilling the demands of plantation owners – people whose culture was foreign to theirs – many of these African Americans found ways to preserve tradition in every aspect of their new lives. Once emancipated, many lived in remote communities on barrier islands off the coast of South Carolina and, due to transportation limitations, had little contact with Europeans. This fostered the creation and preservation of a new dialect, a blend of European and African tongues that became known as Gullah.
Well-known artistic and culinary contributions from the early Gullah culture have survived today and are emblematic of a vibrant legacy. Contributions include the rare shrimper who creates cast nets, African “long strip” quilting, meticulous weaving of sweetgrass baskets and the giving of “basket” names at birth, a revival of indigo cultivation and textile printing in the West African style and numerous chefs who keep to traditions of African foods – such as she-crab soup and benne seed cookies.
South Carolina offers the following special events and attractions related to the Gullah culture this February.
Gullah-n-Geechie Mahn Tour – St. Helena Island, S.C.
Tour St. Helena and the surrounding Sea Islands. Stories and contributions of Africans and how they significantly helped to influence the growth and development of America will come alive on this tour. Group packages will be available, including educational seminars, cultural performances, traditional arts and crafts demonstrations, meal packages and lodging. For more information please visit http://www.gullahngeechietours.net.
Gullah O’oman Shop – Pawleys Island, S.C.
This unique shop features the best of the Lowcountry’s crafts – Gullah collectibles, story quilts, sweetgrass baskets, African artifacts, arts and more. Tours, lectures and seminars on Gullah history and culture too. For more information please call (843) 235-0747.
Gullah Tours – Charleston, S.C.
Gullah Tours explores the places, history and stories that are relevant to the rich and varied contributions made by African American Charlestonians. Tour guide, Alphonso Brown, is a native of Rantowles, a rural community near Charleston, and is fluent in Gullah dialect and familiar with many of the Gullah customs. Gullah Tours provides a view of Charleston not available on other tours from the comfort of a 21-passenger, air-conditioned tour bus. For more information please visit http://www.gullahtours.com.
Ms. Natalie’s Workshop – Beaufort, S.C.
A whimsical Gullah Island Gift Shop in Beaufort offers unusual and fun musical instruments, handcrafted and hand-painted furniture, creative gifts and a craft room for anyone who’s a kid at heart. Ms. Natalie’s Workshop is a colorful interactive, warm place to be that sparks the imagination. For more information please visit http://www.gullahgullah.com/workshop.html.
Native Islander Gullah Celebration – Hilton Head Island, S.C.
Held annually in February, the month-long celebration features the arts, crafts, history, music and food of the Gullah people through various events held each weekend on Hilton Head Island. For more information please visit http://www.gullahcelebration.com.
Penn Center – St. Helena Island, S.C.
Located on St. Helena Island, one of the most beautiful and historically distinct of the South Carolina Sea Islands, Penn Center sits at the heart of Gullah culture, on the 50 acres of the historical campus of Penn School. Designated a National Historic Landmark in 1974, it is a part of the Penn School Historic District which comprised of 19 buildings related to and used by Penn School, the first school for freed slaves in the South. The site also includes the meeting facility where Dr. Martin Luther King Jr. and his colleagues met during the Civil Rights Era, a nature trail, Chowan Creek, acres of pines, native flora and fauna.
For more information please visit http://www.penncenter.com.
The Self Family Arts Center – Hilton Head Island, S.C.
This $ 10 million facility on Hilton Head Island provides a focus for all the arts under one roof – from theater to gallery, music to dance. The Arts Center showcases visual and performing arts events during February which explore the traditions and cultures of African American heritage. For more information please visit http://www.artscenter-hhi.org.
Sweet Grass Tours – Charleston, S.C.
This heritage tour, conducted by certified historic guides, features over 325 years of stories, including slavery, free African Americans, artisans, architecture, Gullah, wars, music and more. Includes group tours by bus or by walking through the city of Charleston. For more information please call (843) 556-0664.
South Carolina is a destination rich in vibrant landscapes, diverse culture and extensive history. Located on the southeast coast of the United States and bordered by North Carolina and Georgia, South Carolina is acclaimed for approximately 200 miles of idyllic Atlantic Ocean coastline. The Palmetto State is the place to explore nature’s best, unwind in first-class luxury hotels and spas, celebrate at a variety of festivals or find a small-town gem. Anywhere within its borders, visitors will find smiling faces and beautiful places. For a South Carolina vacation guide, please call the South Carolina Department of Parks, Recreation & Tourism at (866) 224-9339. For more information on South Carolina, visit the Web site at http://www.DiscoverSouthCarolina.com.
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