A SOLAR-POWERED BOILER

Written by Science Knowledge on 8:24 AM

HEATING YOUR HOME’S WATER SUPPLY WITHOUT USING GAS OR OIL

Why use natural gas or oil to heat your home’s water supply when the sun can do it for free? The big boiler in the sky lays down 100 watts of power across a single square foot. The simple solar-powered hotwater system that I’ve built from scratch will put these free watts to work on the rooftop of my new eco-conscious home. Once I get it installed, it will generate about 450 gallons of hot water a day, plenty for my family of four, while consuming half the amount of energy of a conventional hot-water system. Plus, it will fuel my home’s radiant heating system, a series of polyethylene pipes built into the floor that use hot water to warm the house. The first step is to build two 150- square-foot solar collectors—tidy sandwiches of glass, copper tubes, aluminum sheets and foam insulation held together by a pair of aluminum frames. I’ll position the panels at 65 degrees to the plane of the roof, facing south, like my house, to catch as much sun as possible to heat up the fluid (the antifreeze glycol) flowing through the copper tubes. Next I’ll install a pair of insulated 158-gallon storage tanks in the basement to hold my supply of municipal water. To heat it up, a pump will circulate hot glycol from the collectors through a heat exchanger inside each tank. When sensors in the roof-mounted panels hit about 60°F, a controller automatically turns a valve to start circulating the glycol. One tank distributes water for showers and dishes while the other services the radiant floors. What happens during the winter when the sun’s intensity wanes? That’s where heat from my newly drilled geothermal well comes in. More on that project next month.—JOHN B. CARNETT

Source of Information : Popular Science July 2009

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  1. 2 comments: Responses to “ A SOLAR-POWERED BOILER ”

  2. By Solar Las Vegas on May 18, 2017 at 4:16 PM

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  3. By Solar Albuquerque on May 18, 2017 at 4:17 PM

    Thank you for sharing valuable information. Nice post. I enjoyed reading this post.


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In its broadest sense, science (from the Latin scientia, meaning "knowledge") refers to any systematic knowledge or practice. In its more usual restricted sense, science refers to a system of acquiring knowledge based on scientific method, as well as to the organized body of knowledge gained through such research.

Fields of science are commonly classified along two major lines: natural sciences, which study natural phenomena (including biological life), and social sciences, which study human behavior and societies. These groupings are empirical sciences, which means the knowledge must be based on observable phenomena and capable of being experimented for its validity by other researchers working under the same conditions.


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