City of heat

• Autores: Chelsea Wald
• Localización: New scientist, ISSN 0262-4079, Nº. 2912, 2013, págs. 30-33
• Idioma: inglés
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• Resumen

  • Wald talks about escaped heat, which cost people's money and messes with the climate. Throughout the energy system--from electricity generation in a power plant to boiling a kettle, using boilers to warm houses to powering a car--more than 50% of the energy people use leaks into the surroundings as wasted heat. Waste heat is an enormous problem. A report in 2008 by the US Department of Energy found that the energy lost as heat each year by US industry is equal to the annual energy use of 5 million Americans. The alternative is to just move the heat directly to where it is needed. That is what cogeneration plants do. These are power plants that capture some or all of their waste heat and send it--as steam or hot water--through a network of pipes to nearby cities