1. P11451 Week 3 Cook Stove Test Stand Group

2. Agenda Customer Needs-updated Engineering Specs-updated System Level Work Risk List- version 1 Plans for week 4

3. Customer Needs-Updated Revision #:2 Customer Need # ImportanceDescriptionComments/Status CN11 Accurate Statistical Results: Repeatable results, minimize variability and quantify uncertainity Main customer need, by minimizing variability we can achieve repeatable results and quantify our uncertainity. CN21 Document three standardized stove tests (User Manual) A water boil test (WBT), a quick stove test for teams to test under a range of scenerios with instant feedback, and a test that characterizes traditional Haitian cooking styles. Each test should have documentation and a user manual. CN31 Measure efficiency and it's uncertainity Measure the efficiency of the thermal versus chemical energy used. CN41 SafetyTest stand should be safe to operate for untrained users. CN51 Benchmark against other stoves Test and compare our stove versus rebar stove or another kind of stove under same test conditions. This will allow comparison of results such as fuel usage, emissions, and time to boil CN61 Quantify emissionsGreenhouse gases such as CO and CO2. CN72 Quantify particulate matter Any solid matter output from the stove into the surrounding environment. CN82 Durable Test stand should be durable and able to withstand years of testing CN92 Ease of use Test stand should be ergonomic and easily used by one user. Also testing should be easily performed by any user.

4. Engineering Specifications-Updated Revision #:2 Engr. Spec. # ImportanceSource Specification (description) Unit of Measure Marginal Value Ideal ValueComments/Status ES11 CN1, CN2, CN5 Repeatable time to boil Standard deviation (%) <20%<10% Boiling time (mins) is an output of the WBT and customer need is to have these results be repeatable and to minimize variability ES21 CN1, CN2, CN5 Repeatable specific fuel consumption Standard deviation (%) <20%<10% Ratio of total amount of wood used to the amount of water (grams fuel/ grams of water) from WBT, this a specification that can be used in benchmarking. ES31 CN1, CN2, CN3, CN5 Repeatable thermal efficiency of stove Coefficient of Variation (%) <20%<10% Ratio of the work done by heating and evaporting water to the energy consumed by the fuel source. The thermal efficiency should be repeatable to ensure validity of testing. ES41 CN1, CN2, CN5 Repeatable fuel rate consumption Standard deviation (%) <10%<5% Fuel rate consumption (g/min), by obtaining repeatable results, we can observe the differences in setting up the fuel source and lighting procedure to help us determine the best method and which is conserve fuel the best. ES51 CN1, CN2, CN5 Repeatable firepower Standard deviation (%) <10%<5% Firepower is the rate of fuel energy consumed by the stove per minute which can give us the power output of the stove in watts. This can be calculated from WBT data and could also be useful benchmarking. ES61 CN1, CN2, CN5, CN6 Accurate emission measurementsg (grams)<20 grams< 10 grams Based on Aprovecho WBT emission performance testing, cookstoves should emit less than 20 grams of CO and most forced air stoves emit less than 10 grams. CO2 emissions are unknown. ES71CN4 Number of accidents# Accidents00 Accidents relating to burns, cuts, and shock should be zero for maximum safety. This test stand must be safe for general use. ES81CN2, CN8 User manual ease# Questions<30 Through documentation, any user should be able to read and set up the test stand and perform testing without any questions. ES92 CN1, CN2, CN5, CN7 Accurate particulate measurementsmg<1500 mg<500 mg Based on Aprovecho WBT emission performance testing, cookstoves should emit less than 1500 grams of particulate matter and it seems that most forced air stoves emit less than 500 mg. ES102CN8 Set up timeminutes<20< 10 Related to ease of use, set up time for any user should not take longer than 20 minutes. Goal would be 10 minutes from transporting stand and equipment to loading fuel and lighting fuel.

5. System Level Work System Specifications (Size, Fan, etc.) Noise Factors System Outcomes Positives a)Efficiency Negatives a)Emissions b)Particulate Matter

6. System Level Work Inputs Test Standards a)Charcoal b)Stove (Any Kind) c)Test Type (Short, Relevant, WBT) d)Lighting Technique SYSTEMSYSTEM Outputs a)Emissions b)Solid Wastes c)Test Time d)Efficiency e)Statistical Accuracy

7. System Level Work Improvement Assessment Change in DesignWaste Management Impact Assessment EcologicalHealth Inventory Quantify:Raw Material,Energy,WastePerform the Test Goal Project Scope

8. Risk List-Version 1 IDRisk ItemEffectCause Likelihood Severity Importance Action to Minimize RiskOwner # Short description of project risk. What is the effect on any or all of the project deliverables if the cause actually happens? What are the possible cause(s) of this risk? L*S What action(s) will you take (and by when) to prevent, reduce the impact of, or transfer the risk of this occurring? Who is responsible for following through on mitigation? 1 Metrics could be inaccurate or changing. (Charcoal Mass, Volume Water, etc.) Bad test, data neglected-repeatability decreases. Bad test standards, poor measurement devices. 122 Solid repeatable procedure with proven measurement devices (i.e. beakers, scale, etc.) Whole group 2Ventilation Failure Emission data unknown, test will need to be redone. Fan won’t start, chimney breaks, or won’t attach properly. 236Install dependable fan.Whole group 3 Emission data inaccurate or immeasurable Emission data unknown, or could add noise to the system output. Emission sensor maxed out or not capable of reading highly concentrated emissions. 224 Install researched and proven Emission measurement device Whole group 4 Test difficult to assemble or run. Time lost in experiment, and likely require more than 1 person to run Test stand difficult to push, multiple pieces to assemble, difficult to hook up wires. 313 Minimize number of pieces in assembly, and increase mobility of stand. Whole group 5 Changing weather or atmospheric conditions Noise added to experimental efficiency, etc. Lake Ontario/Jet stream313 Try to plan around Rochester’s Sporadic weather Dr. Bill Destler 6 Changing fuel type (hard/soft charcoal, wood, vines, and combinations) More variables, less repeatability, and more test runs needed. Changing brands of charcoal224Use one repeatable fuel typeWhole group 7 Data acquisition hardware failure/breakdown Cost of new equipment, extra test needed. Hotter fire from wood, general ware. 133 Careful handling of test equipment and solid repeatable procedure. Whole group

9. Plans for Week 4 Create System Level Review – Dry run to prepare for major milepost in week 5. Do assigned homework from lecture. Update EDGE – Download Tortoise SVN – Upload presentations, and deliverables Receive feedback and continue to iterate project deliverables.

10. Questions?

11. Supporting Slides 1

12. Supporting Slides 2