first_imgI just returned from the Greenbuild conference in Phoenix. This annual event, now in its eighth year, has become the leading locus for exchange of information about the rapidly growing green building movement. This year’s event drew some 22,000 attendees, including architects, builders, engineers, developers, and manufacturers, from the U.S., Canada, and dozens of other countries.As is typical at Greenbuild, I spent a lot of my time in the trade show. While there were only a few hundred exhibitors at the first Greenbuild in Austin, Texas, this year’s conference drew 1,800 exhibitors–so I had acres to cover. Indeed, there was lots of new stuff–despite the state of the economy and building industry. This week I’ll focus on one of them: a phase-change wallboard, ThermalCORE, just announced by National Gypsum.You might remember from high school chemistry that when materials change phase (from solid to liquid or liquid to gas) they absorb a lot of energy, and that energy is released when they revert to the lower energy state. If you add heat to a bucket of ice cubes at 0°F, for example, the temperature will rise steadily until it gets to 32°F; then it will remain at that temperature until all of the ice has melted, at which point the temperature of the water will rise again. (This is why we put ice in our drinks; it keeps the drink cool even as we add heat to it–from the room.)This principle can be utilized with heat storage in a house if the melting point of the phase-change material is about room temperature.Phase-change materials (PCMs) were first introduced in the 1970s. Most common were “eutectic salts” and specialized paraffins with melting points between 70° and 80°F. Some were housed in coffee-can-sized metal containers, others in plastic bags. None of these products stayed on the market long; after a few hundred cycles, they no longer melted or thawed completely over the narrow temperature range needed to make them effective for heat storage.National Gypsum’s ThermalCORE that was introduced at Greenbuild (but is not yet on the market) is a micro-encapsulated paraffin PCM. Tiny spheres of paraffin, just 5-10 microns in diameter (less than half the size of Portland cement particles), are encapsulated in acrylic shells, and these are mixed with the gypsum in drywall. The paraffin melts at 73°F, plus-or-minus 2°F. The PCM used in ThermalCORE is Micronal, made by the German chemical giant BASF. Micronal was introduced about five years ago, and BASF has been looking for a U.S. drywall manufacturer to partner with on a PCM wallboard.BASF’s Micronal PCM is available in commercial products in Europe, and it has gone through extensive testing. According to a BASF scientist I spoke with at Greenbuild, the material has been tested through 10,000 phase-change cycles (equivalent to 30 years of use) with no loss in performance.National Gypsum’s ThermalCORE has fiberglass skins (instead of paper), but otherwise looks no different than standard drywall; the micro-encapsulated PCM spheres are far too small to see.Studies show that the ThermalCORE wallboard stores about 22 BTUs of thermal energy per square foot. The idea is that warmth from the sun during the day will be stored in the wallboard, and then released at night to keep the space warm. It will both help prevent overheating during the day and help reduce heating costs during the evening hours. In essence, it’s a high-tech form of thermal-mass materials that are typically used in passive solar design (brick facing walls, tile floors, etc.).Following the roll-out at Greenbuild, National Gypsum will begin field trials to determine how this product can most effectively be used in home building. Field trial sites are currently being sought through the California Emerging Technologies Coordinating Council and the U.S. Department of Energy National Renewable Energy Laboratory in Golden, Colorado; most will be in California.National Gypsum has not said what the cost of ThermalCORE wallboard will be, or when it will be commercially available–except to say that it will not be introduced until after the field trials are complete. For more information, visit ThermalCORE’s website. I’ve been following PCMs for thirty years now, and I think this is the first such product that has a chance of really succeeding–if the cost isn’t too high. I look forward to tracking ThermalCORE’s roll-out.I invite you to share your comments on this blog. You can also follow my musings on Twitter.last_img read more

first_imgCayetano: Senate, Drilon to be blamed for SEA Games mess The 20-year-old Sexton’s promising rookie season was one of the few bright spots for the Cavaliers, who finished tied with the Phoenix Suns for the second-worst record at 19-63 in their first year since LeBron James’ move to the Los Angeles Lakers. The 6-foot-3 guard averaged 16.7 points on 40 percent shooting from the three-point area, 2.9 rebounds and 3.0 assists in his maiden NBA season.Aside from Sexton, WNBA legend Ticha Penicheiro is also in town for the Jr. NBA Philippines.Game 7 saw a crowd of 12,871.ADVERTISEMENT Ethel Booba twits Mocha over 2 toilets in one cubicle at SEA Games venue Dani Ravena gets her time to shine for Ateneo DA eyes importing ‘galunggong’ anew Private companies step in to help SEA Games hosting Catholic schools seek legislated pay hike, too ‘Excited’ Terrence Romeo out to cherish first PBA finals appearance PLAY LIST 01:30’Excited’ Terrence Romeo out to cherish first PBA finals appearance00:50Trending Articles00:50Trending Articles02:42PH underwater hockey team aims to make waves in SEA Games01:44Philippines marks anniversary of massacre with calls for justice01:19Fire erupts in Barangay Tatalon in Quezon City01:07Trump talks impeachment while meeting NCAA athletes02:49World-class track facilities installed at NCC for SEA Games02:11Trump awards medals to Jon Voight, Alison Krauss MOST READcenter_img Two-day strike in Bicol fails to cripple transport Don’t miss out on the latest news and information. Sports Related Videospowered by AdSparcRead Next ‘Rebel attack’ no cause for concern-PNP, AFP [email protected] guard Collin Sexton watching @thesmbeermen and @M_Hotshots battle for the Philippine Cup. #PBAFinals @sonrdINQ pic.twitter.com/LIFXlHYVRs— INQUIRER Sports (@INQUIRERSports) May 15, 2019MANILA, Philippines—Collin Sexton, the Cleveland Cavaliers’ rising star, was among the packed crowd in Game 7 of the PBA Philippine Cup Finals between San Miguel Beer and Magnolia at Araneta Coliseum Wednesday night.FEATURED STORIESSPORTSPrivate companies step in to help SEA Games hostingSPORTSPalace wants Cayetano’s PHISGOC Foundation probed over corruption chargesSPORTSSingapore latest to raise issue on SEA Games food, logisticsSexton, who was the eighth pick by the Cavaliers in the 2018 NBA Draft, is in Manila for the Jr. NBA Philippines national training camp.ADVERTISEMENT LATEST STORIES Duterte wants probe of SEA Games mess View commentslast_img read more

first_imgWeightlifting, wrestling and shooting continue to be India’s best medal bets at the upcoming Asian Games. But of its 550-plus contingent, there will be a few representing sports that barely get sponsorships or noticed by fans.Sport climbingSport climbing gets its first Asian Games break. Three climbers have been chosen for,Weightlifting, wrestling and shooting continue to be India’s best medal bets at the upcoming Asian Games. But of its 550-plus contingent, there will be a few representing sports that barely get sponsorships or noticed by fans.Sport climbingSport climbing gets its first Asian Games break. Three climbers have been chosen for the event, including 18-year-old Bharath Pereira from Bangalore, a six-time junior champion and defending senior one. There will be three events speed, speed relay and a category that combines lead, speed and bouldering. Climbing. (Photo: Cameron Spencer/ Getty Images)WushuThis Chinese form of martial arts is a combination of kicks, punches, stances, jumps, balances and more. India won five medals, including a gold, at the 2017 World Wushu Championships held in Kazan, Russia. One of the winners will be part of the 13-member squad sports Game for Fame. Wushu. (Photo: Richard Heathcote/Getty Images)KurashThe traditional martial art of Uzbekistan makes its debut. Two combatants try to score points by throwing their opponent to the ground. The Indian Olympic Association is sending a 12-member team.Dragon boat race Thank the Delhi High Court for three rowers winning an appeal against the IOA, which did not include them in the Olympics team even though they won a medal at the fifth Asian Dragon Boat Championships. Dragon boat race. (Photo courtesy: DBFI)Sepak Takraw Popular in South East Asia. Players hit a woven ball over a high net without using hands or arms. As in volleyball, the ball should not touch the ground. India will send a mens and womens team.advertisement Sepak Takraw. (Photo: Jung Yeon-Je/AFP)last_img read more

first_imgFor the first quarter of 2018, tourist arrivals were at record levels, says Tourism Minister, Hon Edmund Bartlett.Making his contribution to the 2018/19 Sectoral Debate in the House of Representatives on May 8, the Minister informed that for the period, total arrivals were 1,298,674, an increase of 6.6 per cent, including 625,002 stopovers, up by 6.8 per cent; and 673,672 cruise passengers, up by 6.5 per cent.The Minister said this means that Jamaica recorded 80,000 more visitors for January to March, 2018, compared with the same period last year.“We earned, in the process, US$825.3 million, representing an increase of 8.5 per cent in the first quarter of the year,” Mr. Bartlett told the House.The Minister noted that the month of March also recorded a whopping 11.3 per cent increase in stopover arrivals over the similar month last year.Mr. Bartlett said that Jamaica’s tourism sector is poised to exceed its projected growth targets.last_img read more

first_imgNew Delhi: The Supreme Court on Thursday closed a contempt case against an 88-year old retired public servant for writing objectionable letters to senior advocate Rajeev Dhavan for appearing for Muslim parties in the Ram Janmabhoomi-Babri Masjid land dispute matter. A five-judge bench headed by Chief Justice Ranjan Gogoi said the man had expressed regret for using such objectionable words in his communication to Dhavan. The bench also comprising justices S A Bobde, D Y Chandrachud, Ashok Bhushan and S Abdul Nazeer said there should not be a repetition of such acts again. Also Read – India gets first tranche of Swiss bank a/c details Senior advocate Kapil Sibal, appearing for Dhavan, said he does want any punishment for the retired public servant but a message should be sent to all in the country that there should not be any intimidation of any counsel appearing for any party. The counsel appearing for N Shanmugam said he was expressing his regret for using such words in the letter to Dhavan. The court had on September 3 issued notice to Shanmugam on Dhavan’s contempt plea for allegedly threatening him in a letter, saying physical disabilities will befall him for taking up the case on behalf of Muslim parties against the deity ‘Ram Lalla’.last_img read more

first_imgDarjeeling: With the bipartite talks between the management and tea trade unions ending in a deadlock, the unions have demanded the immediate intervention of the state government in the next round of talks to be tripartite in nature. The trade unions have also lined up a series of agitation programmes to add more muscle to their demand, including blockade on the dispatch of tea.Incidentally, five rounds of bipartite talks between the management and trade unions ended in a stalemate with the workers demanding 20 percent bonus and the management unwilling to pay more than 10.50 percent. Also Read – Bengal family worships Muslim girl as Goddess Durga in Kumari PujaA rally was organized by all the operation tea gardens united in Darjeeling town on Wednesday with tea garden workers participating. The rally culminated in a public meeting at the Darjeeling Motor stand. An indoor meeting was also held, attended by representatives of all trade unions. “The bipartite talks have failed. We demand immediate intervention of the State Government. Tripartite talks will have to be held to break the stalemate,” said Amar Lama, representing the Jan Andolan Party (JAP.) Also Read – Bengal civic volunteer dies in road mishap on national highwayThe trade unions have decided to stop the dispatch of tea from the tea gardens starting from Thursday. “Along with this the workers will observe “go slow” from 8am to 9:30am every day. During this time the staff and sub staff working in the tea garden offices will observe pen down,” added Lama. The tea trade unions have made an appeal to the entire Hills to express solidarity with the tea garden workers. “Tea is the economic mainstay of this region. Not only 60,000 odd workers but more than 2 and a half lakh people (workers and their dependents) are looking forward to the bonus. They contribute a major share to the local economy starting from vehicles, garment shops and eateries are all dependent on them. The entire hill market is waiting for the bonus, so all should come forward to express solidarity with the workers,” Lama said. In a symbolic gesture, the trade unions have appealed to all the shops throughout the hills to down their shutters halfway from 1 pm to 3pm on Friday. “We also appeal to all the political parties and public representatives to support the cause of the workers,” said Lama. Anit Thapa, Chairman, GTA has expressed solidarity with the workers. “After the 104 day bandh in 2017, the tea gardens have not faced a single day bandh hence. I have written to the Chief Minister and the Darjeeling Tea Association that the workers should be given 20% bonus,” stated Thapa.last_img read more