FacebookTwitterLinkedInEmailPrint分享Abby Kessler for E&E:According to a report published by the Department of Energy, reservation lands have the potential to produce about 6 percent of the nation’s renewable energy, although reservations make up just 2 percent of total U.S. land.And despite the potential, Bob Gough, secretary of the Intertribal Council on Utility Policy, or ICOUP, said “next to nothing” is being harnessed.The resources aren’t being tapped due to many factors, including hefty upfront investments required, lack of knowledge about how to plan for such a project and connectivity issues to the nation’s power grid in rural areas.During a DOE presentation last month, John Steward, acting manager for the transmission business unit at the Western Area Power Administration, estimated a feasibility study for implementing renewables would cost an estimated $10,000. A system impact study and environmental assessment would also have to be conducted, preliminary steps that would push the price of potential projects even higher.Sean Esterly, project lead at the National Renewable Energy Laboratory, said funding is “definitely the biggest issue” tribes face when transitioning to renewable energy.Various financing programs are available for federally recognized tribes that provide funds and assistance to nations interested in assessing the potential for renewables on their land. DOE said that between 2002 and 2014, the agency invested $48 million in 183 tribal clean energy projects valued at about $93 million.But, Gough said, the government’s investment in renewables on tribal land is markedly smaller when dispersed among more than 500 federally recognized tribes.Funding shortages may be a concern, but Esterly said connecting tribes to those grants is an important step that is frequently overlooked. He said the tribes aren’t always aware that grant dollars are available to invest in such projects.“Unfortunately, due to capacity of some of the tribes and lack of knowledge of which of the resources they can take advantage, a lot of the opportunities are falling through the cracks,” he said.Another issue is access to the grid. Reservations typically are not well connected to the power grid, making transportation of generated energy an expensive endeavor.U.S. utilities “are operating off of 19th-century organization, 20th-century technology and 21st-century needs,” Gough said of the nation’s grid, noting the aging infrastructure is stymying the entire country’s conversion to cleaner power sources.He said the Great Plains region offers immense wind potential, while the Southwest offers ample possibilities for solar.A recent study from the National Oceanic and Atmospheric Administration and the University of Colorado, Boulder, said wind and sunshine could power most of the United States by 2030. Over large geographic regions, weather trends tend to average out, meaning spreading renewables over swaths of land could smooth highs and lows in electricity output (ClimateWire, Jan. 26).The issue is not intermittency, Gough said, rather the nation’s utility infrastructure.Full article: Renewables offer glimmer of hope for isolated reservations Vast Renewable-Energy Potential Across U.S. Tribal Lands
Barcelona, Bayern Munich and Manchester City are all ready to test Arsenal’s resolve to keep hold of Hector Bellerin this summer.The defender has been in fine form this season and has cemented his position as Arsene Wenger’s first-choice right-back.Bellerin came through the ranks at Barcelona and has long been linked with a return to the Nou Camp.But, according to El Confidencial, Bayern Munich and Manchester City are also keen to try snap up the 21-year-old this summer.The pair, along with Barcelona, believe Arsenal could be tempted into selling the Spaniard if they received a mega offer.Bellerin, however, signed a new long-term contract last summer and is settled in north London. Hector Bellerin [right] in action for Arsenal 1
OAKLAND — Khris Davis fought the railing, and the railing won.Davis bruised his hip and oblique after colliding with a railing at PNC Park in Pittsburgh back on May 5. This happened as the slugger — playing left field at the National League park — was chasing a fly ball.That bruise had barked enough since: Davis was finally placed on the 10-day IL retroactive to May 22.“Never really got better, never really got worse,” A’s manager Bob Melvin said of the injury prior to Friday’s series opener …
Share Facebook Twitter Google + LinkedIn Pinterest By Matt ReeseAs trade talks between the United States and China ramp up, China announced the long-awaited approval of five genetically modified crops. This is the first GM crop approval by China for import since July of 2017.The approved products include two canola products, DowDuPont Inc’s DP4114 corn and DAS-44406-6 soybean, and the SYHT0H2 soybean from Bayer CropScience and Syngenta, but now owned by BASF. The Chinese approval of these GM crops is viewed by many as a positive sign in the ongoing trade war between China and the United States.“The traits approval is a surprise. The talks in China involve a lot of people — it is not just one guy from each side sitting at the table. I think it is more than political posturing. That is what we have seen for months by both sides,” said Doug Tenney, with Leist Mercantile. “I expect that we will see an announcement of a trade deal sooner, not later.”Tenney said U.S. Commerce Secretary Wilbur Ross indicated that a trade deal “we can live with” could be reached.“Here is the irony — with the government shutdown we are not getting the Thursday 8:30 a.m. weekly grain export sales report. Nor are we getting the daily 9 a.m. flash report of grain export sales. The trade now thinks that a Chinese government buying agency has purchased 5 million tons of U.S. soybeans,” Tenney said. “Imagine the excitement that farmers will share with each other when the government reopens and announces China bought 5 million tons of soybeans. We are in unchartered territory — I’m not sure how USDA will report this after the fact.”
We intended to follow the commissioning process described in a Canadian ventilation standard: CSA-F326, “Residential Mechanical Ventilation Systems.”In Canada, ventilation systems can be designed to meet the building code or as an alternative to comply with CSA-F326 (the case for this meticulously designed mechanical system).CSA-F326 requires the installer to certify that the ventilation system installation complies with the standard by filling out “Form A,” which in turn can be considered by building officials as a performance certificate. Our first job was to figure out the Total Ventilation Capacity (TVC), and then to balance the room-by-room air flows. The standard is very forgiving in that it allows for ±15% on the TCV measurement and ±25% on room-by-room air flow rates when compared to design values (1).Few designers or installers of residential ventilation systems plan for commissioning. Typically the HRV or ERV is tucked high into a corner of the basement mechanical room, with flex-duct contorted and crammed on all four stations.Image credit: AHRIThe Air-Conditioning, Heating, and Refrigeration Institute (AHRI) labels the HRV port for entering outdoor air as Station 1; the port conveying fresh supply air to the house is referred to as Station 2; the port bringing stale air to the HRV or ERV is referred to as Station 3; and the port that conveys stale air destined to be exhausted to the exterior is referred to as Station 4.The Heating, Refrigeration and Air Conditioning Institute of Canada (HRAI) suggests that the best place for flow collar placement is on the warm side (at Stations 2 and 3), before any branches. When it comes to accurate measurements of air flow, doing a transverse with a Pitot tube comes in third. The second-best approach is to use the more convenient insert-type linear flow measuring station. Of course, the best method is to install a four-quadrant flow measuring station, despite the labor involved.The house in question didn’t have ideal places to install our four-quadrant flow sensors. Having recently invested in a pressure-compensated balometer which I hoped would earn its keep, I decided to measure at Stations 1 and 4. RELATED ARTICLES Residential CommissioningCommissioning Our Heat-Recovery Ventilator Cutting the Gordion Knot of HVAC System Commissioning Designing a Good Ventilation System BY GREG LABBE Air Leaks in Homes Insulated With Spray FoamOrigami-Inspired HomesPastiche ArchitectureNew LED Lights on the Scene What’s going on?Because of constrained access to Stations 2 and 3, the flow collars wouldn’t have made sense, so we had to use a Pitot tube, and the numbers were not reliable. So we took apart the ductwork to check whether the inline dampers were OK. There were no adjustable air flow dampers for this ERV.Then we dove into the manufacturer’s manual to change jumpers on the mother board to offset one of the two fan motors. Still the flow rates were impossible. We were getting in some cases over 100 cfm more exhaust air (at Station 4) than outdoor air (at Station 1), and no HRAI ventilation course could have prepared us for what we went through.The technical literature suggested that it was common for an ERV with a heat transfer wheel to mix in extra “purge” air to combat cross contamination — which might explain our difficulties. In this case, the heat transfer wheel was cut into pie-shaped pieces that fit in walled slots that aim to reduce the cross contamination. It should be noted this particular brand of ERV is quite common in high-performance homes in Ontario, and those who have them love them. We’ve had a previous experience commissioning the same model without such a large spread. Deriving the Total Ventilation CapacityIn the end, we derived TVC by adjusting flows room by room, and then simply ensuring the house pressure was neutral at TVC (see Image #7, below.) Having witnessed the build at the bare duct stage, we knew duct leakage wasn’t an issue, though we could have tested for it.The lessons learned included:Ensure that the mechanical designer selects an HVI-certified or AHRI-certified model; andEnsure that the heat exchanger core uses an airtight membrane that prevents cross-contamination. Greg Labbé is co-owner of BlueGreen Consulting Group, a high-performance home consulting firm that works with architects, builders, and homeowners to optimize the energy performance of new and existing homes through detailed energy modeling and site testing. Following a standard for commissioning the systemFortunately, none of the appliances in the home were susceptible to combustion spillage: there were no CO2 sources (wood or fossil fuel appliances) and there were no exhaust-only appliances that depressurized the house (i.e., no bath exhaust fans and no range hood exhaust fan; the clothes dryer was condensing). A defective control boardIn the end, common sense prevailed. Using a watt meter, we diagnosed that something was the matter with the control board. The board was replaced and in the end, flows in and out were within CSA’s spec for the TVC.By design, this meant that air flow at Station 1 wouldn’t equal air flow at Station 4. The ratio between those two air flows is called the Outdoor Air Correction Factor (OACF), which ideally should stay as close to 1.0 as possible.There’s another cross-contamination measurement called the Exhaust Air Transfer Ratio (EATR), which is the ratio of the exhaust air transfer to the supply flow rate. The ERV in question was laboratory tested in general accordance with CAN/CSA-C439-00, “Standard Methods of Test for Rating the Performance of Heat Recovery Ventilators.”The ERV wasn’t listed as HVI-certified (or AHRI-certified if a commercial unit). The OAFC wasn’t available, but the EATR was calculated at 0.09 by the manufacturer, which translates to about 3% of the exhaust air being transferred into the fresh air stream. In other words, if we wanted 100 cfm of fresh air delivered, we’d have to bump it up to 103 cfm; but that wasn’t consistent with our measured findings in the field. This might work in the lab, but not in the field — where we were getting differences of 100 cfm, possibly due to a large OACF, or possibly due to the home’s unique custom ductwork or the added resistance of a pre-heater (see Image #3, below). Footnote1. Discussing the topic of excellence, Aristotle suggested that “It is the mark of an instructed mind to rest satisfied with the degree of precision which the nature of the subject admits and not to seek exactness when only an approximation of the truth is possible.” This observation is useful when considering whether to use the garbage bag test or a Flowfinder. It also makes sense to work with the designer to ensure that the flow measuring stations (Stations 2 and 3) are specified in the design and are clear of turbulent features, and to communicate that requirement to the installer (see Image #1 at the top of the page). Though it probably applies more to commercial systems, Venmar suggests, “If OACF is ignored in the selection process, then the prescribed amount of fresh air will not be supplied to the space and poor indoor air quality may result — in addition to creating numerous potential issues with balancing and commissioning.”For a thorough treatment of the calculations and more explanation of the jargon used above, see AHRI’s “How ERVs Work” section; it is brilliant. I’d also recommend downloading and reading NRC’s pdf for insights into the testing process: “Evaluation of IAQ Impact of Balanced Residential Ventilation devices that incorporate HRV and ERV.” What’s the error range?When I spoke with the top scientist at ACIN Instrumenten (the manufacturer of the balometer) in the Netherlands about our proposed method using the FlowFinder Mk II, the scientist suggested that the error of the method could be a bit higher than 3%. Given the alternative, that sounded acceptable and well within CSA-F326 10.2.1â€²s suggested ±15% for a quick and painless “no-tin-snip and tape” commissioning. This was progress!Stations 1 and 4 were the same shape. We taped the cardboard flange to the perimeter of the vent in order to get a reasonably good seal with our balometer. The backdraft dampers were not in the hood, but in the duct. Three sequential measurements were taken to account for potential errors due to wind.Armed with flow-measuring stations, Pitot tubes, and our new balometer, we started measuring to find where our TVC might be on the variable-speed control board. This would then allow us to adjust flows room by room — except that the flows in and out of the house were off. Way off. We were recently called to commission a fully ducted energy-recovery ventilation (ERV) system in a newly constructed, “near passive” house.Commissioning an ERV usually involves dialing in the specific ventilation rate on the variable control knob, and then adjusting air flows room by room according to the intended mechanical design. We also needed to ensure that the system didn’t change the pressure in the house with respect to the outdoors. At risk of stating the obvious, mechanical ventilation systems will either pressurize or depressurize a home if not commissioned properly. (See Image #2 at the bottom of the page.)What we thought was going to be a straightforward job turned into a multi-day time-gobbler that taught us a few lessons.
Begum Hamida Habibullah, a former Rajya Sabha member and a pioneer in women empowerment, died here on Tuesday.She was the daughter of Nawab Nazir Yar Jung Bahadur, Chief Justice Of Hyderabad High Court and wife of Major General Enaith Habibullah, who went on to become the first Commandant of the National Defence Academy.Her grandson Saif Habibullah announced the news of her demise through his Facebook account.Born on November 20, 1916, Hamida was 30 when India achieved independence and was a witness to modern India’s political history, stretching from the British rule to the bloody partition. She witnessed the building of new nation, glory days of the Congress Party and its subsequent decline to the present domination by the BJP.Her son, Wajahat Habibullah, was India’s first Chief Information Commissioner of India and former Chairman, National Minority Commission.Ms. Habibullah was known for working on women issues. She worked with SEWA (Self Employed Women’s Association), which promoted self employment for women and the art of Lucknow’s famous chikankari ( thread embroidery).She joined politics with the Congress after her husband returned from the army in 1965 and went on to become an MLA from UP’s Haidergarh seat in Barabanki from 1969 to 1974. From 1971 to 1973, she was a Minister of State in the U.P. government and a Rajya Sabha member from 1976 to 1982.She held the Social and Harijan Welfare, National Integration & Civil Defence, and Tourism ministries.Hamida passed senior Cambridge with Distinction in 5-Subjects before going on to get a gold medal in B.A. from Osmania University.
Pittsburgh and Dallas have met three times. Pittsburgh won the first rematch, a 35-31 thriller in Super Bowl 13. Then, 17 years later, Dallas defeated the Steelers 27-17.Other rematches:FEATURED STORIESSPORTSPrivate companies step in to help SEA Games hostingSPORTSUrgent reply from Philippine football chiefSPORTSPalace wants Cayetano’s PHISGOC Foundation probed over corruption charges—Redskins 27, Dolphins 17 in Super Bowl 17; a rematch of Miami’s perfection-capping victory in Super Bowl 7.—Giants 21, Patriots 17 in Super Bowl 46; a rematch of New York’s win, which spoiled New England’s run at an undefeated season, four years earlier. US judge bars Trump’s health insurance rule for immigrants —Cowboys 30, Bills 13 in Super Bowl 38; a rematch of Dallas’ crushing of the Bills the previous year.—Eagles 41, Patriots 33 in Super Bowl 52; a rematch of New England’s win in Super Bowl 39.Sports Related Videospowered by AdSparcRead Next SEA Games hosting troubles anger Duterte PH underwater hockey team aims to make waves in SEA Games PLAY LIST 02:42PH 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 Come together: Super Bowl Sunday, the last stand of live TV Los Angeles Rams quarterback Jared Goff (16) stretches during practice for the NFL Super Bowl 53 football game against the New England Patriots, Friday, Feb. 1, 2019, in Flowery Branch, Ga. (AP Photo/John Bazemore)Today’s game between the Rams and Patriots marks the eighth rematch in Super Bowl history.Good news for the Patriots: The team that won the previous matchup is 4-3. New England defeated the Rams, then in St. Louis, 20-17 back in 2002.ADVERTISEMENT Oil plant explodes in Pampanga town Grace Poe files bill to protect govt teachers from malicious accusations View comments MOST READ Private companies step in to help SEA Games hosting ‘We are too hospitable,’ says Sotto amid SEA Games woes LATEST STORIES PDEA chief backs Robredo in revealing ‘discoveries’ on drug war Don’t miss out on the latest news and information. ‘We are too hospitable,’ says Sotto amid SEA Games woes
Marko Mitrovic insists no regrets over time with Chelseaby Paul Vegas25 days agoSend to a friendShare the loveMarko Mitrovic has no regrets over his time with Chelsea.The Swedish striker joined the Blues as a 16 year-old from Malmo and spent five years with the giants before moving onto Brescia.He recalled to Fotbollskanalen: “It was a wonderful period. I scored a lot of goals during my years there and won the FA Youth Cup with the team. It was real elite football, the training sessions were top-notch. “Every session with players like Drogba, Terry and Lampard taught me a lot.”I had a good relationship with coach Carlo Ancelotti, won the reserve league and the FA Youth Cup, and thought I would reach the A team.” About the authorPaul VegasShare the loveHave your say
07Mar Rep. Glenn announces local office hours Categories: Annette Glenn News State Rep. Annette Glenn announced her in-district office hours for the month of March. The representative will be available at the following times and locations:Friday, March 15o 4:45 to 5:45 p.m. at H&H Bakery and Restaurant, 200 S. Mable St. in Pinconning. Monday, March 18o 8:30 to 9:30 a.m. at Tropical Smoothie, 985 S. Saginaw Road in Midland.“Holding regular office hours is a great way to connect and hear from members of the community,” Glenn said. “I look forward to receiving your input on the important issues facing our state.”No appointments are necessary to attend office hours. Those unable to attend may contact Rep. Glenn’s office at (517) 373-1791 or AnnetteGlenn@house.mi.gov.
Bouygues TelecomThe acquisition of Bouygues Telecom by Numericable-SFR, which is widely expected by investors in France, could be less attractive than anticipated, according to analysts at Exane BNP Paribas.In a note reported in the French press, Exane BNP Paribas has downgraded its rating of Numericable-SFR from neutral to underperform on the basis that an acquisition of Bouygues’ telecom unit would likely be conditional on it divesting part of its mobile subscriber base, most likely to the benefit of rival Free.While the acquisition is expected to generate synergies of around €6 billion and additional value from a recovery of the overall market to the tune of around €2 billion, Exane BNP Paribas estimates that a loss of around 5% of the subscriber base as a result of regulatory conditions would reduce the value of the combination by about €2 billion.Exane BNP Paribas also downgraded its recommendation on Bouygues from overperform to neutral.