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This Week's Progress
Project Objectives
Project Objectives
Primary Objectives
Reach a target temperature difference of 8.3°C (15°F)
Operate for a duration of at least 1.5 hours
Maximize the Coefficient of Performance (COP)
Secondary Objectives
Avoid cooling loss to environment
WOW Design Solution
Reach target temperature within 300 seconds
Functional Requirements and Constraints
Operating temperature
Maximum ambient temperature ~38°C (100°F)
Weight must be kept at an acceptable comfort level
Target 2.72kg (6lbs)
Ergonomics
User must maintain full range of motion
Power supply requirements
Limited by battery power and size
Water-loop designs must be watertight
Thermoelectric Cooling (Peltier) Device
A thermoelectric cooling device (TEC) operates as a heat-pump and transfers heat from cold side to hot side
Pros:
Solid-state heat pump (no moving parts)
Small form factor
On-demand cooling
Cons:
Low efficiency
High electric power demands
Risk Reduction Strategy
Risk analyses were performed in order to make design decisions on how to cool the body and dissipate heat from Peltier devices.
Components analyzed
Tubing
Copper plating
Heat sink
Radiator
Intermediate Milestones
Kickoff Meeting (11/19)
Preliminary Research (Peltier devices, materials, etc.) completed (11/23)
Problem Definition(11/24)
Determined Project Objectives & Risk Reduction Objectives
Initial heat flux analyses, materials research, Peltier efficiency (12/1)
BoM/Parts list completed & reviewed w/ sponsor (12/4)
Identified vapor tubes as option for increased efficiency in heat sink (12/8)
Completed individual component analyses (12/15)
Completed Risk Reduction (12/15)
Identified optimal design solution to begin prototyping
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