P11462: Thermoelectric and Fan System for Cook Stove
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Establish Target Specifications

Given the customer needs, awareness of the marketplace, and resource limitations of the current project, preliminary engineering specifications were generated. The nominal and/or target value of each specification is set to provide guidance to the team on the ideal value or direction that the team should strive for once the nominal target values have been realized.

List of Engineering Specifications
Engineering Spec. Description Importance Relates to Customer Need(s) Units Marginal value Ideal Value Comment/Status
1 Flow rate of air into stove 9 1, 6, 13 kg/min 0.3 - 0.7 0.2 - 0.8 STP conditions
2 Flow control settings 3 6, 13 # 2 3 Evenly distribute across the flow range
3 Unit price 9 3 $ 27.50 12.50 Material cost only
4 Coupling time with no tools 1 2, 7, 12 Minutes 10 5
5 Removal time with no tools 1 2, 7, 12, 15 Minutes 10 5
6 Product life span 3 4, 9 Years 3 5 Assume 2 hr/use and 3 uses/day
7 Replaceable component life span 3 4, 9 Years 1 2 Rod, fan, battery
8 Auxiliary Charging 3 11,16 Wh 4 Being able to charge ~2 cell phones/day
9 Battery size 3 11,13,16 Ah 2 Energy required for 5 product startup cylces/Provide 2Ah @ 1.2V per battery cell
10 Weight 1 7, 8, 12, 15 kg 2.5 2
11 Volume 1 7, 8, 12, 15 cm^3 3000 1000
12 Time to reach peak performance 1 13, 16 Minutes 15 10 Within 90% of SS assuming charcoal ignites instantanly
13 User actions during operational cycle 3 6, 7, 13 # 6 4
14 User actions to protect system 3 5, 7 # 1 0
15 Maximum temperature inside enclosure 3 1, 4, 9, 14 degC 60 50
16 Maximum external temperature of housing 3 7, 8, 14 degC 54 45
17 Maximum temperature of hot side of TEG 9 9, 16 degC 275 300

Importance Scale: 1 - Low Importance, 3 - Moderate Importance, 9 - High Importance


Identify Customer Needs | Establish Target Specifications | Identify Risks | Generate Product Concepts | Select Product Concept(s) | Proposed Product Concept | Project Interfaces | Concept Design Review Documents | Concept Design Review Action Items

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