P11451 Week 3

Cook Stove Test Stand Group

Agenda

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

Customer Needs-UpdatedRevision #: 2

Customer Need #

Importance Description Comments/Status

CN1 1

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.

CN2 1

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.

CN3 1Measure efficiency and it's uncertainity

Measure the efficiency of the thermal versus chemical energy used.

CN4 1Safety Test stand should be safe to operate for untrained users.

CN5 1

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

CN6 1 Quantify emissions Greenhouse gases such as CO and CO2.

CN7 2Quantify particulate matter

Any solid matter output from the stove into the surrounding environment.

CN8 2Durable

Test stand should be durable and able to withstand years of testing

CN9 2

Ease of useTest stand should be ergonomic and easily used by one user. Also testing should be easily performed by any user.

Engineering Specifications-UpdatedRevision #: 2

Engr. Spec. #

Importance Source Specification (description)Unit of

MeasureMarginal

ValueIdeal Value Comments/Status

ES1 1CN1, CN2,

CN5

Repeatable time to boilStandard 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

ES2 1CN1, CN2,

CN5Repeatable 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.

ES3 1CN1, CN2, CN3, CN5

Repeatable thermal efficiency of stoveCoefficient 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.

ES4 1CN1, CN2,

CN5

Repeatable fuel rate consumptionStandard 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.

ES5 1CN1, CN2,

CN5

Repeatable firepowerStandard 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.

ES6 1CN1, CN2, CN5, CN6

Accurate emission measurements g (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.

ES7 1 CN4Number of accidents # Accidents 0 0

Accidents relating to burns, cuts, and shock should be zero for maximum safety. This test stand must be safe for general use.

ES8 1 CN2, CN8User manual ease # Questions <3 0

Through documentation, any user should be able to read and set up the test stand and perform testing without any questions.

ES9 2CN1, CN2, CN5, CN7

Accurate particulate measurements mg <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.

ES10 2 CN8

Set up time minutes <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.

System Level Work

System Specifications(Size, Fan, etc.)

Noise Factors

System

OutcomesPositives

a)EfficiencyNegatives

a)Emissionsb)Particulate Matter

System Level Work

InputsTest Standards

a)Charcoalb)Stove (Any Kind)c)Test Type (Short, Relevant, WBT)d)Lighting Technique

SYSTEM

Outputsa)Emissionsb)Solid Wastesc)Test Timed)Efficiencye)Statistical Accuracy

System Level Work

Improvement Assessment

Change in Design Waste Management

Impact Assessment

Ecological Health

Inventory

Quantify:Raw Material,Energy,Waste Perform the Test

Goal

Project Scope

Risk List-Version 1ID Risk Item Effect Cause

Likelihoo

d

Severit

y

Importanc

eAction to Minimize Risk Owner

# 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?

1Metrics could be

inaccurate or changing. (Charcoal Mass, Volume

Water, etc.)

Bad test, data neglected-repeatability decreases.

Bad test standards, poor measurement devices. 1 2 2

Solid repeatable procedure with proven measurement devices (i.e.

beakers, scale, etc.)Whole group

2 Ventilation FailureEmission data unknown,

test will need to be redone.

Fan won’t start, chimney breaks, or won’t attach

properly.2 3 6 Install dependable fan. Whole group

3Emission 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.2 2 4 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.3 1 3

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 stream 3 1 3 Try to plan around Rochester’s

Sporadic weatherDr. Bill Destler

6Changing fuel type (hard/soft charcoal,

wood, vines, and combinations)

More variables, less repeatability, and more

test runs needed.Changing brands of charcoal 2 2 4 Use one repeatable fuel type Whole group

7Data acquisition

hardware failure/breakdown

Cost of new equipment, extra test needed.

Hotter fire from wood, general ware. 1 3 3

Careful handling of test equipment and solid repeatable

procedure.Whole group

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.

Questions?

Supporting Slides 1

CO Emission

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Simple Stoves Rocket Stoves Gasifiers Forced Air Charcoal Liquid/Gas

Supporting Slides 2

PM Emissions

0500

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2. G

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PM

Em

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To

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lete

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T (

mg

)

NOTE: Only 1 PM measurement for 9 stoves

Simple Stoves Rocket Stoves Gasifiers Forced Air Charcoal Liquid/Gas