Therm-O-Bench Presented by Team 4:Cassian Whitehurst, Damon Grosso, and Suyoung Choi
Park Benches NowO Heat up in sunO Uncomfortable to sit on heated metalO With continuous sunlight, users can run the risk of burn on bare legs
Therm-O-BenchO Button on bench arm triggers cooling mechanism to cool the userO Five minutes of continuous cold air project from the bench surfacesO Keeps user cool and refreshed on a hot summer day
How will this work?O A refrigerant in vapor form is sent into a compressor hidden in housingO The compressed vapor has a higher temperature (because of the inverse relationship between pressure and temperature of gases)O The hotter vapor is passed into a condenser and expansion valve (also hidden)O The resultant liquid refrigerant is passed into tubes inside and directly outside the bench cooling the bench and its user.
Bench ConstructionO The bench will be constructed from steel alloyO Steel maintains a high thermal resistance with a low costO Titanium would be more ideal because of its higher thermal resistance, but is very expensive if many benches were to be produced.
Bench LogicO This is the basic system logic that will allow the cooling system to communicate with the user input (button)
Marketability?O The bench will primarily be marketed to parks and recreation departments of major urban citiesO Cities will have a greater need for a larger quantity of benchesO The will also be beneficial around recreational areas so they can cool down hard working athletes
Technologies We NeedO An easily cooled metal that is not heat conductant from which the bench frame will be constructedO A small vapor compression refrigeration system that will attach to the seat and back rest of the bench to pump cold air through the bench to the user
Energy EfficiencyO The cooling mechanism will run for 5 minutes continuously to prevent constant cooling without a userO If the user is sitting for longer than 5 minutes, they can simply repress the buttonO Benches will be not operational during cold seasons to further conserve energy