Considerations:

For cool feeling generation: It is noticed that to generate a cool feeling, a few degrees lower compared with ambient temperature would do the job.

1. For shoe modification: There were many similar shoe projects, which involve shoe modification. In this project, I hope the whole device could be transferred to a new shoe in a short period of time. Therefore, the shoe is decided not to be damaged.
2.  For the cooling insole: The heat from the feet should be dissipated as soon as possible and the contact surface with the insole should be large. Therefore, a conductive insole should be designed/ modified.
3.  For time management: As the project was started on 19 July 22, the lead time of the purchasing parts should be considered as well.

Requirement:

Therefore, the design requirement was setup as below:

• Temperature decrease: <10 deg
• Conductive insole
• Large contact surface
• The shoe should not be modified

The process flow is quite straightforward.

1. The warm/ room temp water is cooled down with a thermoelectric cooler.
2. The cool water is pumped into the insole
3. The heat from the feet is dissipated by the cooling insole
4. Repeat 1. until equilibrium

The following is the conceptual design