Refrigerator - The Secret Life of Machines - Video/DVD

Refrigerator - 25 minutes The program starts with early machines such as the earthenware cooler. Then demonstrates cooling effect of CO2 gas expanding. Archive of early century natural ice industry - ice boxes. Australian invents first true fridge. Commercial ice production using ammonia fridges shown. In 1935 first domestic fridge. TV advertising archive. Light inside demo. Model demonstrates expansion & contraction. Fluorocarbon used as refrigerant. What is inside electric motor & compressor. How it works (See pic - still from compressor animation). Use of compressed air demo. Thermostat to control temperature. Fridge cut in half shows insulation in walls. Early fridge box strength - demo. Use of magnetic seal today on doors. Special notes

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	The Secret Life of Machines has been on TV around the world - USA, Australia, UK, Britain.... These award winning television programmes show how machines work. Using analogies, illustrations, working models and extraordinary experiments, Tim Hunkin 'lifts the bonnet' on the machines we take for granted. His enthusiasm for his subject is infectious. Excellent education and technology resources.
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