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Context of 'September 27, 1816: Scottish Inventor Patents Solar ‘Heat Engine’'

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Robert Stirling applies for a patent for his “Economiser” at the Chancery in Edinburgh, Scotland. Stirling, a minister in the Church of England, is an amateur scientist and inventor. His “Economiser” is a “heat engine” that uses the sun’s thermal energy to produce small amounts of power. Lord Kelvin later uses one of Stirling’s working models to demonstrate the value of solar power in his university classes. The “Economiser” is later used as part of the design of the “Dish/Stirling System,” a solar thermal electric technology that concentrates solar energy to produce power. [US Department of Energy, 2002 pdf file]

Entity Tags: Robert Stirling

Timeline Tags: US Solar Industry

Inventor Clarence Kemp of Baltimore patents the first commercial solar water heater. Kemp, who sells cutting-edge home heating equipment, combines the older practice of exposing metal tanks to sunlight with the scientific principle of the “hot box” (see September 27, 1816), thus increasing the tanks’ capability of collecting and retaining heat. He calls his invention the “Climax.” He first markets it to Eastern “gentlemen” whose wives have gone on holiday for the summer, leaving them to their own devices. Kemp sells his heaters by claiming that they will reduce the effort needed to perform housekeeping duties, especially for men unaccustomed to lighting the gas furnace or stove to heat water. Later, Kemp will find a brisk market for his Climax heaters in warmer states such as California. By 1897, a third of the households in Pasadena will use the Climax to heat water in their homes. [California Solar Center, 2001; US Department of Energy, 2002 pdf file]

Entity Tags: Clarence Kemp

Timeline Tags: US Solar Industry

Despite the initial success of the “Climax” solar water heater (see 1891), consumers are dissatisfied with a major drawback of the heater: its inability to keep the water it heats hot for more than a few hours. Inventor William J. Bailey of the Carnegie Steel Company separates the solar heater into two components: a heating element exposed to the sun and an insulated storage unit kept inside the home. Bailey’s invention allows families to have solar-heated water day and night, and even into the next morning. The device keeps water in narrow pipes instead of a large tank, allowing the water to retain its heat longer and for less water needing to be exposed to the sun at any given time. Bailey calls his invention the Day and Night, and by 1918 sells over 4,000 of the heaters. [California Solar Center, 2001; US Department of Energy, 2002 pdf file]

Entity Tags: William J. Bailey

Timeline Tags: US Solar Industry

1916: Scientist Proves Photovoltaic Effect

Scientist Robert Millikan provides experimental proof of the photoelectric effect. [US Department of Energy, 2002 pdf file]

Entity Tags: Robert Millikan

Timeline Tags: US Solar Industry

By the 1930s, the solar water heater industry is essentially killed off in California by discoveries of huge natural gas reserves in the Los Angeles basin. William Bailey, who has grown rich selling his solar-powered water heaters (see 1909-1918), adapts his design for a thermostatically-controlled gas water heater. His Day and Night Solar Water Heater does quite well in Florida, where a building boom has brought in an influx of new residents, many of whom have to pay high rates for hot water. Florida’s semi-tropical climate and its housing boom creates an excellent selling environment for Bailey’s “hybrid” water heater. By 1941, over half of Florida residents heat their water with solar or solar-gas heaters. However, declining energy rates after World War II combined with an aggressive effort by Florida Power and Light to increase electrical consumption by offering electric water heaters at bargain prices brings the state’s solar water heater industry to its knees. [California Solar Center, 2001]

Entity Tags: William J. Bailey

Timeline Tags: US Solar Industry

October 18, 1992: EPA Hires Ombudsman

The EPA hires Robert J. Martin as the agency’s National Ombudsman (see November 24, 1984). [US Congress, 6/25/2002]

Entity Tags: Robert J. Martin, Environmental Protection Agency

Timeline Tags: Environmental Impact of 9/11

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