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MH370: Another piece of wreckage confirmed

first_imgAir safety investigators have confirmed that it is “highly likely” a piece of wreckage found off the coast of Tanzania, Africa, is from missing Malaysia Airlines flight MH370.Australian Transport Minister Darren Chester  Minister confirmed late Friday that an analysis of the wing part, believed to be part of a flap, by theAustralian Transport Safety Bureau had established the link.  Flaps are moveable panels extended when a plane lands to increase the wing surface area.“The experts will continue to analyse this piece to assess what information can be determined from it,” Mr Chester.The latest finding brings the tally of parts from the wreckage to six. A flaperon – another type of moveable wing surface that combines the attributes of an aileron and a flap – found on Reunion Island a year ago was confirmed by French officials as coming from the plane.The ATSB  has also determined a segment of engine cowling found on a beach in South Africa and a piece of interior panel found in Mauritius are almost certainly from the plane. It made this same finding for two pieces of debris found in Mozambique and thought to be part of the horizontal stabiliser.Mr Chester said in his statement that the debris  pieces were located in areas consistent with drift modelling performed by Australia’s Commonwealth Scientific and Industrial Research Organisation and affirmed  the focus of search efforts in the southern Indian Ocean.He said the underwater search, continuing about 2600kms west of Perth in the  120,000 sq. km priority search, was expected to be finalised by December.“We remain hopeful that the aircraft will be located in the remaining search area,” he  said. “As agreed by Ministers from Malaysia and the People’s Republic of China and Australia at the tripartite meeting on July 22, in the event that the aircraft is not located in the current area, the search for MH370 will be suspended on the completion of the 120,000 square kilometre high priority search area unless credible new evidence about the specific location of the aircraft emerges.’’A European drift study published this week also confirmed  the Indian Ocean as the  impact  zone but  suggested that the plane could be as far as 500kms north of the current search area.The study by Euro-Mediterranean Center on Climate Change looked at five of the pieces of debris found so far and attempted to model how they had travelled and their origin.The study’s simulation defined an area which overlapped the northern half of the zone the ATSB is currently searching.”However, our simulation shows that the debris could also have originated up to around 500 km further to the north,” said centre researcher and lead author of the study, Eric Jansen.  “If nothing is found in the current search area, it may be worth extending the search in this direction.”last_img read more

‘Invest in South African infrastructure and ICT’ – Ramaphosa at WEF Africa

first_img13 May 2016Positive returns on investment are almost guaranteed in the infrastructure and ICT sectors in South Africa, and elsewhere on the continent, Deputy President Cyril Ramaphosa told potential investors at the World Economic Forum on Africa in Kigali, Rwanda.Ramaphosa was speaking at a session on how innovative partnerships can bridge financing gaps for economic and social infrastructure. He is leading Team South Africa – made up of government, business and civil society leaders – at WEF Africa, which this year is being held under the theme “Connecting Africa’s resources through digital transformation”.Ramaphosa and his delegation reassured investors at the forum that South Africa is a preferred investment destination, and open for business.“Infrastructure has been a key economic driver in South Africa and in the region,” Ramaphosa said during the session on Thursday 12 May. In South Africa, he added, the coordination of infrastructure development through the Presidential Infrastructure Coordinating Commission had “paid great dividends”.“Investment in infrastructure has stimulated economic activity. Therefore, there are returns to be made for investors in infrastructure in South Africa and Africa.“Infrastructure is better done when approached at a regional level, because our countries are inter-linked through the movement of people and trade.”Watch Deputy President Cyril Ramaphosa discussing infrastructure at WEF Africa:Ramaphosa added that South Africa had found innovative ways of partnering with the private sector, especially in energy. This had opened new opportunities for private sector investment.He also encouraged investment in connectivity through technology and digital solutions, saying that this should be a priority for African economies.Watch the full Investing in Infrastructure session at WEF Africa:On the final day of WEF Africa, Friday 13 May, Ramaphosa is to take part in a high-level breakfast on the Internet for All Initiative, a project to develop new scalable and replicable models of public-private collaboration in order to accelerate internet access globally.In this session, leaders from governments and multilateral organisations and business will discuss the progress of the first country pilot programme in the Northern Corridor, and set out the next steps.Team South Africa includes Ministers Pravin Gordhan, Rob Davies, Siyabonga Cwele, Ebrahim Patel and Jeff Radebe. The business delegation includes Eskom, the Industrial Development Corporation, Old Mutual, ArcelorMittal and Business Unity South Africa.last_img read more

Minisplit Heat Pumps and Blizzards

first_imgHere’s the same condenser after the defrost cycle: RELATED ARTICLES A blizzard (a severe snowstorm and sustained winds of over 35 mph) is a challenging weather condition for a minisplit heat pump. Recall how an air-source heat pump works: the outdoor unit has a compressor and a fan that blows air across a coil with refrigerant. In heating mode, the coil is colder than the outdoor air. As air is drawn through the coil, it gives up heat to the coil and leaves the other side colder. The more humid the air (and remember: the warmer the air is, the more moisture it can hold), the more condensation occurring on the coil. At temperatures at or below freezing, that condensation may freeze on the coil, reducing air flow through the coil and heat transfer to the refrigerant. GBA Encyclopedia: Ductless Minisplit Heat PumpsJust Two Minisplits Heat and Cool the Whole House Will Minisplits Replace Forced-Air Heating and Cooling Systems?Two Years With a Minisplit Heat PumpReport on Our Ductless Minisplit Heat PumpLooking for the Best Minisplit OptionMinisplit Heat Pumps and Zero-Net-Energy HomesHeating a Tight, Well-Insulated HouseNew Englanders Love Heat PumpsLoving My MinisplitsAre Seven Heads Better Than Three? Defrost cycles prevent freeze-upsHeat pumps are designed to sense this type of condition, and periodically operate a defrost cycle, in which the heat pump reverses and uses some energy to melt the frost off the coils. Below is a photo of a Fujitsu condenser with frost building up: Here’s a Daikin condenser that I think has a faulty defrost cycle. (The photo below was taken at a house at which South Mountain has installed a solar electric system.) The frost has built up considerably: BLOGS BY MARC ROSENBAUM Drainwater Heat Recovery Comes of AgeMinisplit Heat Pumps and Zero-Net-Energy HomesPractical Design Advice for Zero-Net-Energy HomesDuctless Minisplit Performance During Cold WeatherInstalling a Ductless Minisplit System Marc Rosenbaum is director of engineering at South Mountain Company on the island of Martha’s Vineyard in Massachusetts. He writes a blog called Thriving on Low Carbon. Marc teaches a 10-week online Zero Net Energy Home Design course as part of NESEA’s Building Energy Master Series. You can test drive his class for free. Through about 2:00 p.m., the outdoor temperatures were in the mid-to-upper 20Fs, and the defrost cycles, marked by the dips in power draw, occurred roughly every 4 hours, lasted 4-5 minutes, and drew under 250 watts. Once the storm starts up, outdoor temperatures are right around freezing, and the fine snow is being whipsawed around by the strong winds, which can drive the snow into the coil, coating it and triggering the defrost cycle.The blizzard becomes a moisture delivery system. The defrost cycles are much more frequent, slightly over once per hour. And the duration rises to 15 minutes or so, with a power draw of 500 watts. Note also that after the defrost cycle the heat pump power draw jumps up to 900 watts or so, whereas before the storm it was running at 450 watts for much of the time.It appears that the firmware drives the heat pump up to the higher power draw for a certain amount of time after every defrost cycle, and when the cycles are frequent, it never drops down to the “cruising” power draw. So both efficiency and capacity are reduced, because the energy going into defrost isn’t going into the house. You can tell when the defrost cycle occurs because the indoor fan shuts off — otherwise it would be blowing cold air.The condenser needs clearance beneath it, because the melt from the defrost cycle is going to freeze once it drips down off the condenser, and in the worst case it freezes under the condenser and crushes the lowest row of the coil and the unit is ruined. So it makes sense to raise the condenser above the snow line and keep it under an overhang or roof.This all becomes more severe if the condenser is actually buried in snow. In the worst case, the heat pump shuts down, and we saw this at a couple of houses here. My own unit is up off the ground, and under a small roof, but the January 26-27 storm came from the northeast and still packed the gap between the house and condenser 40-50% full of snow. We’re considering doing more wall-mounted installations, getting them at least 2 feet off the ground — but architects don’t want to see the condenser(s), so the inclination is to install them low to the ground and behind screening. But this usually makes them more vulnerable.Here’s a neat wall-mounted installation: We’ve been pleased that these seem not to impart vibration to the house, the units must be very well-balanced.Does this mean that houses heated by minisplit heat pumps, with no back-up heating system, are more vulnerable in bad storms than houses heated by modern fossil fuel burning equipment? Not necessarily — those fuel-burning units have their own issues in storms. Sealed-combustion sidewall vents can be plugged by ice or wind-driven snow, and wind gusts can cause the pressure-sensing switch to shut the units down.So modern heating systems in general are more twitchy in severe weather than the old atmospherically vented boiler venting into a interior masonry chimney, with a barometric damper. Do we want to go back to that? For a number of reasons, I’d say no. Houses that need that big boiler or furnace are much more likely to freeze up when that unit goes down (say, in a power outage) than a small superinsulated house with a minisplit.My sense is, get ’em up off the ground, and check them in a bad storm. So, the above photo excepted, we’ve been talking about normal conditions, not a blizzard. Image #2 (at the bottom of this article) is a graph showing the power input to the Fujitsu at our house on January 26, 2015, as outdoor temperatures rose and the blizzard began.last_img read more

Is IPL a sports or commercial activity: Bombay HC asks MCA

first_imgMumbai, Jun 30 (PTI) The Bombay High Court today asked if the Indian Premier League (IPL) cricket tournament was a sports or a commercial activity and if the Mumbai Cricket Association (MCA) had taken water from the BMC for ground and pitch maintenance during the IPL this year.A bench of justices A S Oka and Vibha Kankanwadi posed the query while hearing a petition filed by civil society Loksatta Movement in 2016 raising concerns over water usage for ground management during the IPL when the state was reeling under drought.In April 2016, the high court had directed the Board of Control for Cricket in India (BCCI) to shift all the IPL matches to be held in Maharashtra after April 30 outside the state due to the severe drought conditions.The bench today sought to know from the MCA, which manages the Wankhede stadium in south Mumbai, if it had taken water from the Brihanmumbai Municipal Corporation (BMC) to maintain ground and pitch during the IPL matches this year.”We would also like to know from the MCA if the IPL is considered as a sports activity or a commercial activity,” Justice Oka said.The query was made after it was pointed out to the court that as per the government policy, water supply is divided on priority basis into four categories. As per the policy, supply of water for drinking purposes comes first and supply of water for events such as shahi snan (royal bath) falls in the last category.”Category C in the policy says water supply for industrial and commercial purposes. So does IPL fall under this category? Is it a commercial activity?” Justice Oka asked.advertisementThe court directed the MCA to file an affidavit also detailing which other activities are held at the Wankhede stadium and if they are sports or commercial activities.The court has posted the petition for further hearing on August 14. PTI SP NP RAXlast_img read more

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