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Gas Absorption Refrigeration

Gas Absorption Refrigeration. Erik Cates ME 3322. What is it???. Uses a heat source(gas or propane) to run a cooling process Cooling is caused by heat absorption by refrigerant as it is evaporated, which removes it from the system

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Gas Absorption Refrigeration

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  1. Gas Absorption Refrigeration Erik Cates ME 3322

  2. What is it??? • Uses a heat source(gas or propane) to run a cooling process • Cooling is caused by heat absorption by refrigerant as it is evaporated, which removes it from the system • Refrigerant gas is then converted back to liquid form to repeat cycle • Most commonly used refrigerant is Ammonia

  3. What it Looks Like

  4. The Parts • Generator- receives heat from source, produces ammonia gas • Separator- separates ammonia gas from water • Condenser- hot ammonia gas is cooled, condensed to liquid form • Evaporator- evaporates ammonia liquid, creates cold effect inside refrigerator • Absorber- absorbs ammonia gas into water

  5. Relevance? • Dalton’s Law- the total pressure from gas mixture is sum of all partial pressures • Hydrogen doesn’t react with ammonia- hydrogen simply takes up space • In evaporator- hydrogen/ammonia mixture causes the partial pressure of ammonia to be lowered, which lowers the boiling point of the ammonia to below room temperature

  6. Advantages • No moving parts • Doesn’t require electricity • Quiet • Makes use of excess heat • No HCFC’s – harmful to environment

  7. Applications

  8. Works Cited • http://en.wikipedia.org/wiki/Absorption_refrigerator • http://home.howstuffworks.com/refrigerator5.htm • http://www.solarmirror.com/cgi-bin/faq.cgi?_recurse=1&file=17 • http://www.martinsburgrv.com/images/featured/21_62.jpg

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