Half-time: Wigan 0 Chelsea 2

first_imgChelsea – and new signing Eden Hazard in particular – made a blistering start to their Premier League campaign.The European Champions were 2-0 up after only seven minutes, with Belgian starlet Hazard involved in both goals.He skipped away from his man and threaded through a perfect pass for Branislav Ivanovic, who fired in the opener.Frank Lampard then netted from the penalty spot after Hazard had been brought down by Ivan Ramis.Hazard was handed his league debut for the Blues and fellow new arrival Oscar is among the substitutes.Ryan Bertrand was given a starting place ahead of Daniel Sturridge, while Ramires is out because of illness.Chelsea transfer target Victor Moses was included in Wigan’s starting line-up.Click here for the Wigan v Chelsea quizFollow West London Sport on TwitterFind us on Facebooklast_img read more

Wedoist Introduces Real-Time Contemporary Project Management

first_imgAmir Salihefendic, the mastermind of Todoist and Plurk, has introduced another -ism with Wedoist. Wedoist is a real-time project management tool – think along Basecamp lines. Amir has folded into the system a number of tech trends, hoping to point the product into the future. Wedoist offers the following features. Real-time updates on everythingStatus updatesTask managerGroup chat “I think one of the most interesting things about Wedoist is the technology stack, which uses Comet for all updates, said Wedoist’s developer Amir Salihefendic. “This means that each change gets broad-casted to everyone in a team instantly.” In tackling online project management, Amir and friends are entering a crowded field. Aside from Basecamp, there is the well-established Zoho, PBWorks, LiquidPlanner, Huddle, Clarizen and ActiveCollab.Perhaps the real-time features will keep it in the field, but will they allow it to stand out? Top Reasons to Go With Managed WordPress Hosting curt hopkins A Web Developer’s New Best Friend is the AI Wai… Tags:#enterprise#web Why Tech Companies Need Simpler Terms of Servic… Related Posts 8 Best WordPress Hosting Solutions on the Marketlast_img read more

Drainwater Heat Recovery Comes of Age

first_imgThe EcoDrain is a wastewater heat recovery device that replaces a section of horizontal drain pipe. The devices enables heat from water flowing down the drain to be transferred to cold water flowing toward a shower valve.David Velan of EcoDrain paid us a visit here at South Mountain so my colleague Brice Delhougne and I could see his product firsthand. A few years ago David got interested in capturing the waste heat in shower water and other hot waste water. Others have done that (PowerPipe) but they have been limited to applications where the vertical heat exchanger, usually 4 to 6 feet long, can fit, and still be higher than the wastewater outlet from the building.EcoDrain’s innovation is a wastewater heat exchanger that can be mounted horizontally.In the photo above, you can see the inlet and outlet, which are 2-inch-diameter PVC, and the side taps for the inlet and outlet for the potable water. The unit is about 56 inches long. The flow is countercurrent: the wastewater on top flows one way, and the potable water below flows in the opposite direction and picks up heat across the copper interface. Depending on the relative flow rates, and the pitch of the unit, the EcoDrain recovers 30-45% of the energy in the wastewater.David went through many evolutions before arriving at his product. It has a double-wall heat exchanger configuration that should satisfy codes (the product has a UPC acceptance) and square section tubes on the potable water side to maximize heat exchange contact area. The upper portion of the unit is PVC and is smooth to minimize any buildup of solids. The photo at left shows a cross section. Let’s do some Marc’s Sloppy Math. Say a family uses 30 gallons/day of shower water and 1/3 of that energy is recovered. That’s about 625 kWh/year. At $0.20/kWh (Massachusetts residents are about to see a 30-35% rise in the supply portion of their electric bills due to last winter’s natural gas price squeeze!), that’s $125 per year. The unit costs $440, and let’s say it ends up at an installed cost of $1,000. There’s a simple 8 year payback. With natural gas this will be worse.To get 625 kWh/year from PV would take about 500 watts of panel, which costs more than the EcoDrain installed.One application David related to me is using the EcoDrain in cases where people are running out of hot water. Recovering drainwater heat effectively stretches the storage capacity of a water heater.David kindly left us with one and we’re looking for a good application, so we can monitor its performance in an actual situation. We were impressed with the iterative thoughtful engineering embodied in the product, its rugged construction, the testing EcoDrain has done to show energy recovered, and its clog-free performance. One of the EcoDrain innovations is seen in each square tube: a plastic insert designed to keep the flow highly turbulent to increase heat transfer.The bottom of the unit has a drain hole so that any leaks become obvious quickly.The unit is designed to work with very slight pitch, like a typical plumbing waste line, but it can be pitched at more severe slopes, and the increased velocity of the wastewater increases heat recovery.The unit can be plumbed so that the preheated water flows to the cold side of the shower, or to both the shower and the cold inlet of the water heater. The latter equal flow configuration will harvest the most BTUs. RELATED ARTICLES BLOGS BY MARC ROSENBAUM What We Started WithSolving Our Design ProblemsMoving to a New HouseMinisplit Heat Pumps and Zero-Net-Energy HomesPractical Design Advice for Zero-Net-Energy Homes Drainline Heat ExchangersDrain-Water Heat RecoveryRobert Dumont’s Superinsulated House in SaskatoonDrain Water Heat Recovery Gets a Boost in Ontario 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.last_img read more