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= Cooling =

 * Normal
   * A: Using compressor
   * B: absorption refrigerator - e.g. Ammonia Absorption
   * C: The Peltier effect uses electricity to pump heat directly

 * Magnetic Refrigeration
   * http://en.wikipedia.org/wiki/Magnetic_refrigeration

 * Thermoacoustic refrigeration - using a standing sound wave.
   * http://en.wikipedia.org/wiki/Thermoacoustic_refrigeration

 * Storing cold in ice.
   * [[attachment:CALMACFrequentlyAskedQuestionsAboutThermalEnergyStorage.pdf]]
   * PCM (Phase Change Materials)  http://www.pcmproducts.net

 * Absorption refrigeration
   * http://lionheart.net/fridge/descript.htm

 * Conversions - btu / kW(kilowWatt)
   * 1 kw = 3412 Btu/hr = 0.28 tons of cooling

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