· web viewthe lid is of course for cooking, the pipe protruding slightly through the near side is...

Test 141 TZ 1 FLDD with Hopper 2011-03-25

Stove Emissions and Efficiency Testing LaboratoryUlaanbaatar, Mongolia

Contact: Prof Lodoysamba, [email protected]

STOVE TEST REPORT

Test Number______141______ Date___2011-03-25___ Test requested by: __Owner______________

1. PRODUCT DESCRIPTION

Stove Name _TV 1_ Stove manufacturer __ Temuun Ulzii ____ Stove provided by ___Producer______

Notes about stove: The End-lit crossdraft Round stove (ELCD Round) is a prototype. It arrived needing a couple of design changes which were implemented immediately. The has a fire that is ignited on the right hand side of a rectangular combustion chamber which sits astride the stove, running from left to right. There is a 65mm diameter steel flame tube welded into the right side of the back wall of the combustion chamber. It has primary and secondary air controllers and preheated secondary air. To a certain extent the primary air is also preheated under the grate. There is a sliding door near the ignition point which allows access to the fuel for lighting.

Combustion type _____Front-lit Downdraft_ Intended application for the stove _____Heating/cooking_ (updraft/ cross draft/ downdraft/ gasifier) (heating/cooking/low pressure boiler/wall stove)

Fuels specified for use in this product __Nalaikh raw coal broken to about 25/35 mm_____

Lighting method suggested by the manufacturer:

A wood and paper fire was ignited on a small portion of coal. It proved difficult to initiate the downdraft and several attempts were made over a period of time. This was the second day of testing. The previous attempt had also failed to create a thriving fire. The stove was allowed to burn for two hours until about 50% of the fuel had been burned, then the test was stopped.

2. FUEL DESCRIPTION

2.1. Name ____Nalaikh raw coal_________________

2.2. Source ____On the street____________________

2.3. Analysis performed by __C Pemberton-Pigott sent it to a gov’t lab_

2.4. Heating Value: Lower Heating Value (LHV)__17.12__ MJ/kg and As Received __11.97__MJ/kg

2.5. Analysis As Received (AR)Moisture 26.1 %Ash 5.90 %Sulphur 0.43 %Hydrogen 3.90 %Carbon 52.47 %Oxygen 10.20 %Nitrogen 1.17 %


PHOTOGRAPHS OF THE STOVE

Side View of the TZ 1

The lid is of course for cooking, The pipe protruding slightly through the near side is an air entry pipe. The long strip of metal with a handle is a central fuel hopper.

The flames travel through the grate under the fuel hopper the pass into the small heat exchanger at the back (right side of photo). From there they go up the chimney.

The holes on the right wall provide secondary air. The left wall serves as a divider between the hopper and the combustion chamber.

The grate is very large for a downdraft stove of this power so it is expected that it will only work well at a high burning rate, and that the CO will jump up as soon as the high power phase has needed.

Is it not clear from the photograph what the purpose of the two pipes on the left side of the fuel hopper are used for.

3. TEST DESCRIPTION

Stove operated by ____Lodoysamba______________ Data recorded by ___ Lodoy+Staff_________

Test Protocol used __Standard burn, >5.7 kg without refuelling_

Starting time _11:21 AM__ Ending time __15:33 PM___

Lighting procedure used __As above______________________________________________________


Notes about the environment during the test:

PM 2.5 about 125 microgrammes per cubic metre in the laboratory air, steady during the day___________________________________________________________________________________

4. TEST RESULTS, SUMMARY

4.1. Data analysis sheet version number used _ _2.59.4_____

4.2. Summary results

4.2.1. Fuel loaded during first burn, g _ 5785_____

4.2.2. Burn time, minutes_______________251_____

4.2.3. Fuel loaded during refuelling, g__ N/A ____

4.2.4. Refuelling burn time (minutes) _ __N/A _____

4.2.5. Percentage of fuel burned when analysis of the test ended ___50.0%______

4.2.6. kW (average) during whole burn __ _________2.30__ kW

4.2.7. PM2.5 per Net MegaJoule of heat produced 2349 milligrammes

4.2.8. CO emitted per Net MegaJoule of heat produced 27.61 grams

4.2.9. Notes about summary results:

Particulate Matter was emitted continuously. The CO/CO2 ratio is very high low immediately after the fire is lit and remains there. The ratio only dropped during the brief times flames were present and intervention was made. For practical purposes the stove cannot cook.

4.2.10. Notes about the operation of the stove during the test:

Ignition fuel was loaded and lit. The fire developed poorly. Several attempts were made with wood and paper to get the downdraft working but it was not very successful.

________________________________________________________________________


5. DETAILED RESULTS AND CHARTS

5.1. POWER and FUEL CONSUMPTION

5.2. COMBUSTION EFFICIENCY AND GAS EMISSIONS


5.3. THERMAL EFFICIENCY OF HEATING AND COOKING


5.4. PARTICLE EMISSIONS

5.5.


5.6. PERFORMANCE


5.7. TEST INFO

5.8.

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5.8.5.8. WATER BOILING


6. DISCUSSION

6.1. The Test Info indicates that the stove burned only 50% of the fuel. As this was the second day of testing it was assumed that the stove has some fundamental problems related to the long flame path under the hopper. Another attempt was not attempted.

6.2. The stove appears well made. It was welded completely all round and well-sealed. There is a secondary air controller on the right hand side which opens a large diameter pipe (approx. 75 mm in diameter).

6.3. Like most downdraft stoves, cook can only start when there is a well-developed fire in the firebox that has coked most of the coal so as to provide radiant heat to the pot.

6.4. The thermal efficiency is less than 54% indicating a high excess air ratio carrying away much of the heat in the form of warm air.

6.5. The top of the stove is rectangular with a round hole in it. There is only one hole size, meaning that there is no set of nested rings for different pot sizes.

6.6. The stove will not qualify for support as it is.

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