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The Baltimore Harbor Light, officially Baltimore Light and historically Baltimore Harbor Lighthouse is a privately owned caisson lighthouse in the Chesapeake Bay in Maryland. [ 2 ] [ 3 ] [ 4 ] First lit in 1908, it sits at the mouth of the Magothy River , marking the channel which leads northwest to the opening of the Patapsco River , which ...
Dover Sun House was one of the world's first solar-heated houses. It was designed by architect Eleanor Raymond and had a heating system developed by physicist Mária Telkes . In 1948, Mária Telkes and architect Eleanor Raymond began working on the Dover Sun House. [ 2 ]
Sloan then built a number of passive solar houses, and his publicity efforts contributed to a significant "solar house" movement in the 1940s. [8] Frank Lloyd Wright used passive solar principles in some of his designs, most notably in the Jacobs House, built in 1944 in Wisconsin, which was also known as the "Solar Hemicycle" or "Solar Hemicyclo."
A heat pump might use 1 J for every 4 J it delivers giving a COP of 4. A system that only uses a 30 W fan to more-evenly distribute 10 kW of solar heat through an entire house would have a COP of 300. Passive solar building design is often a foundational element of a cost-effective zero energy building.
In 1979, President Jimmy Carter installed solar panels on the roof of the White House. Amid an energy crisis, Carter hoped to reduce the country's dependence on foreign oil.
A Fresnel lens can also capture more oblique light from a light source, thus allowing the light from a lighthouse equipped with one to be visible over greater distances. The first Fresnel lens was used in 1823 in the Cordouan lighthouse at the mouth of the Gironde estuary ; its light could be seen from more than 20 miles (32 km) out. [ 18 ]
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