P11462: Thermoelectric and Fan System for Cook Stove

Flow Rate Variation Test

Through research into fan sizing and our stove pressure drop test we realized that providing the initial required airflow (1.2 kg/min) would be difficult. We were interested in specifying a lower flow rate. A water boil test was performed to better understand the added effect of the forced air. The time for 2 Liters of water to boil was recorded at 3 different flow rates: 20, 30, and 40 CFM. Before the tests were run the stove was run for 20 minutes to allow it to reach a thermal steady state.

Flow Rate Considerations
Starting Water Temp (degF) Flow Rate (CFM) Time to boil (min)
51.1 20 3:54
48.6 30 3:15
50.9 40 3:13

Based on these results we determined that the flow rate could be scaled back to about half of our initial specification.

Overall Heat Transfer Coefficient Test | Stove Pressure Drop Test | Flow Rate Variation Test | Beam Sizing Memo | Heat Sink Sizing Memo | Additional Mechanical Considerations | Proposed Design Screenshots | Thermoelectric I-V and Power Curves | Battery Sizing | Mechanical Detailed Drawings | Electrical Schematics | Bill of Materials | Preliminary Test Plans | Detailed Design Review Documents | Detailed Design Review Action Items | Managerial Design Review Presentation