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Design Constraints
The biggest design contraint given by Dr. Draper was cost. Current systems make use of the large heat transfer coefficients of metals, such as copper and aluminum. Since the price of these metals has increased drastically, a new transfer medium must be found.
Dr. Draper also required the use of a compressor to drive the system. The compressor was chosen for its ability to make use of the compressibility of air. Increasing the pressure of the air will in turn increase the temperature as well. This will allow the system to work during off-peak hours.
The system must be capable of heating 50 gallons of water to 120 degrees in a day. This will provide for the hot water needs of an entire family each day. The system must also use less power than a conventional water heater.
If these requirements can be met, the design will be considered a success.
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