2012年12月29日星期六

The Power of a HotLoad

The Power of a HotLoad the precious minerals into your mining truck and be careful not to drive too fast with your heavy foot. Body

As I waited with a throng of Parisians in the Rambuteau Metro station on a blustery day, my frozen toes finally began to thaw. Alone we may have shivered, but together we brewed so much body heat that people began unbuttoning their coats. We might have been penguins crowding for warmth in Antarctica’s icy torment of winds. Idly mingling, a human body radiates about 100 watts of excess heat, which can add up fast in confined spaces.

Heat also loomed from the friction of trains on the tracks, and seeped from the deep maze of tunnels, raising the platform temperature to around 70 degrees, almost a geothermal spa. As people clambered on and off trains, and trickled up and down the staircases to Rue Beaubourg, their haste kept the communal den toasty.

Geothermal warmth may abound in volcanic Iceland, but it’s not easy to come by in downtown Paris. So why waste it? Savvy architects from Paris Habitat decided to borrow the surplus energy from so many human bodies and use it to supply radiant under-floor heating for 17 apartments in a nearby public housing project, which happens to share an unused stairwell with the metro station. Otherwise the free heat would be lost by the end of the morning’s rush hour.

Appealing as the design may be, it isn’t quite feasible throughout Paris without retrofitting buildings and Metro stops, which would be costly. But it is proving successful elsewhere. There’s Minnesota’s monument to capitalism, the four-million-square-foot Mall of America, where even on subzero winter days the indoor temperature skirts 70 from combined body heat, light fixtures and sunlight cascading through ceiling windows.

Or consider Stockholm’s busy hub, Central Station, where engineers harness the body heat issuing from 250,000 railway travelers to warm the 13-story Kungsbrohuset office building about 100 yards away. Under the voluminous roof of the station, people donate their 100 watts of surplus natural heat, but many are also bustling around the shops and buying meals, drinks, books, flowers, cosmetics and such, emitting even more energy.

This ultra green, almost chartreuse, body-heat design works especially well in Sweden, a land of soaring fuel costs,Find detailed product information for howo spare parts and other products. legendary hard winters, and ecologically minded citizens. First, the station’s ventilation system captures the commuters’ body heat, which it uses to warm water in underground tanks.Find detailed product information for howo spare parts and other products. From there, the hot water is pumped to Kungsbrohuset’s heating pipes, which ends up saving about 25 percent on energy bills.

Kungsbrohuset’s design has other sustainable elements as well. The windows are angled to let sunlight flood in, but not heat in the summer. Fiber optics relay daylight from the roof to stairwells and other non-window spaces that in conventional buildings would cost money to heat. In summer, the building is cooled by water from a nearby lake.

It’s hard not to admire the Swedes’ resolve. During the 1970s, Sweden suffered from pollution, dead forests, lack of clean water and a nasty oil habit. In the past decade, through the use of wind and solar power, recycling of wastewater throughout eco-suburbs, linking up urban infrastructure in synergistic ways, and imposing stringent building codes, Swedes have cut their oil dependency and drastically reduced their sulfur and CO2 emissions.

Part of the appeal of heating buildings with body heat is the delicious simplicity of finding a new way to use old technology (just pipes,High quality stone mosaic tiles. pumps and water). Hands down, it’s my favorite form of renewable energy.

What could be cozier than keeping friends and strangers warm? Or knowing that by walking briskly or mousing around the shops, you’re stoking a furnace to heat someone’s chilly kitchen?

How about the reciprocity of a whole society, everyone keeping each other warm?

Widening their vision to embrace neighborhoods, engineers from Jernhusen, the state-owned railroad station developer, are hoping to find a way to capture excess body heat on a scale large enough to warm homes and office buildings in a perpetual cycle of mutual generosity. Heat generated by people at home at night would be piped to office buildings first thing in the morning, and then heat shed in the offices during the day would flow to the residences in the late afternoon. Nature is full of life-giving cycles; why not add this human one?

Alas, I don’t see body-heat sharing sweeping the United States anytime soon. Retrofitting city buildings would be costly at a time when our lawmakers are squabbling over every penny. Also, the buildings can’t be more than 100 to 200 feet apart, or the heat is lost in transit. The essential ingredient is a reliable flux of people every day to provide the heat.

Managing Director. Shinn served as the executive assistant to Acting Mayor Caldwell in 2010. She has over twenty years of experience practicing law in California where she represented public and private entities in public law and employment litigation. She served as General Counsel for Oakland Unified School District and the Peralta Community College District. Shinn returned home to Hawaii in 2001, retired from the practice of law,Whether you are installing a floor tiles or a shower wall, and worked for the State House of Representatives as staff attorney for the Judiciary Committee and as special assistant and Chief of Staff for the Speaker of the House.

Deputy Managing Director. Deemer served as the Director of Communications for the House of Representatives, where she worked with Caldwell when he was the House Majority Leader. She served for 15 years as the State of Hawaii Film Commissioner under the Ariyoshi, Waihee and Cayetano administrations where she developed working relationships with city, state and federal agencies for film permitting for local, national and international production. She oversaw the design, construction and management of the Hawaii Film Studio at Diamond Head. In addition to her duties as Deputy Managing Director, she will oversee and unify the City's broad communications efforts across all agencies, elevating the importance of communications in the Caldwell administration.

Director of Transportation Services. Formby served as the Interim Director of Transportation under the Lingle administration, where he oversaw the management of the Airports, Harbors and Highways Divisions. Prior to that, he was the Deputy Director of the Harbors Division. At the DOT state level, he worked extensively on project planning and implementation, and with the state's environmental assessment and environmental impact statement process. Formby is an attorney; he has been a litigator for the past 20 years, and has taught at the William S. Richardson School of Law and Hawaii Pacific University. He supports Mayor Caldwell's vision for rail and other transportation issues.

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