Erik CatesME 3322

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

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

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

No moving parts

Doesn’t require electricity

Quiet

Makes use of excess heat

No HCFC’s – harmful to environment

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