Team P12242 Marissa Blockus, Brandon Harbridge, …edge.rit.edu/edge/P12442/public/Week_4_Presentation.pdf · Next Generation Charcoal Stove for Haiti Team P12242 Marissa Blockus,

Next Generation Charcoal Stove for Haiti

Team P12242

Marissa Blockus, Brandon Harbridge, Sam Huynh, Brianna Stephenson-Vallot, Dustin Tyler

Team Members

• Brandon Harbridge (IE) – Team Lead

• Samantha Huynh (ME) – Lead Engineer

• Marissa Blockus (ME) – Team Facilitator

• Brianna Stephenson-Vallot (ME) – Team Engineer

• Dustin Tyler (ME) – Team Engineer

Customer Needs Need Importance Description Notes

1 9 Affordable (initial cost <$10 at high production)

2 9 Requires less fuel for same cooking tasks

3 9 Reduced CO emissions

4 3 Reduced PM emissions

5 3 Easy to operate (little user interaction and intuitive processes)

6 9 Same or improved cooking controls

7 9 Obtain rapid boil quickly and then bring to simmer

8 9 Able to be fabricated and assembled using Haitian artisan practices

9 3 Transportable (able to be moved by a single Haitian adult 500 m)

10 3 Rugged (can handle being dropped and withstand harsh conditions)

11 9 Durable - lifetime of five or more years Used twice a day

12 3 Have simple, cheap and easily replaceable parts

13 9 Thermoelectric module will not fail due to high termperature and gradients

14 9 Safe to operate

15 9 Maintain appropriate temperature gradient across thermoelectric module

16 9 Achieve Desired temperature gradient quickly

Importance Scale: 1 - low importance, 3 moderate importance, 9 high importance

Engineering Specifications Eng Spec

Description Importance Units Marginal

Value Ideal Value

Relates to Cust Needs

Notes

1 Cost 9 $ <$10 <$10 1

2 Assembly time 3 min < 3 < 3 12,8

3 Fuel reduction 9 kg 50% >50% 2,3

4 CO reduction 9 g 25% >50% 3

5 PM reduction 3 g 25% >55% 4

6 Time to boil time reduction

9 min 25% >25% 7

7 Maximum Surface Temperature

1 °C < °50 C < °40 C 14

8 Time to boil for Modified WBT

3 min < 15 < 8 7,6

9 Range of heat output 3 kW 1 - 6 .8 - 6.2 7

10 Capable pot diameters

3 cm 20 - 60 15 - 65 5,6

11 Withstand pot mass 9 kg 25 30 5,6

12 Five or less tasks to maintain fire

3 tasks 5 < 5 5,6

13 Replacement: Part cost

3 $ 3 < 3 12

Engineering Specifications Cont’d Eng Spec

Description Importance Units Marginal

Value Ideal Value

Relates to Cust Needs

Notes

14 Replacement: Time req’d 1 min 60 < 60 8,12

15 Replacement: Tools req’d 3 - - - 8 Simple Haitian hand tools

16 Stove overall mass 3 kg 8 8 1

17 Stove volume 1 m^3 0.2 < 0.2 1

18 Stove construction 9 - - - 8 Simple Haitian hand tools

19 Survive 20 x 2m drop tests 3 drop tests 20 20 10,11

20 Ergonomics metrics 3 - - - 8,9,10,14

21 Minimum temperature gradient across TE

9 °C 200 200 15 Under peak conditions

22 Quickly reach temp gradient

9 min 20 15 16

23 Stove electrical consump. 9 W .6 - 1 <.9 13

24 Max thermoelectric temperature on hot side

9 °C 380 (400) 380 15 380°C continuously and 400°C intermittently

25 Max TE temp on cold side 9 °C 200 200 15

26

TE module is mechanically loaded evenly & does not exceed module failure limit

9 - - - 15

System Energy Flow

Morphological Chart Functions Possible Solutions

Maintain Temperature Difference

Heat Sink

Forced Air

Damper System

Remain Under Specified Temperature Reduced Air Speed

Transfer Energy from TE Heat Sink

Liquid Cooling

Convert Heat into Electricity Thermoelectric

Regulate Rate of Fuel Burn Forced Air

Control Amount of Directed Heat Forced Air

Sleeve Surrounding Pot

Mount and Locate TE Stove Body Modification - Partition

Associated Risks

System, Materials and Manufacturing, TEG, Fan and Conducting Rod Risks

TEG Testing Results

Tests Completed on 1/11/11

Future Plans

• The arm mounting the thermoelectric will be shortened and have a taper to regulate temperature gradient.

• Raise the location of the extended surface to decrease time lapse for thermoelectric temperature requirement.

• Reposition wiring location for thermoelectric data acquisition.

• Change geometry of stove for better heat distribution, introduction of partition.

Questions?