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 user

O Five minutes of continuous cold air project from the bench surfaces

O 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 cities

O Cities will have a greater need for a larger quantity of benches

O 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 constructed

O 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 user

O If the user is sitting for longer than 5 minutes, they can simply repress the button

O Benches will be not operational during cold seasons to further conserve energy

Basic CAD Drawings

Basic CAD Drawings

The End

Thank you for your time.