ML19339C492
| ML19339C492 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/10/1980 |
| From: | Dalzell W, Gillis J EMVWALKF, KIDDE, INC. (FORMERLY WALTER KIDDE & CO., INC.) |
| To: | |
| Shared Package | |
| ML19339C488 | List: |
| References | |
| PSR-914, NUDOCS 8011180477 | |
| Download: ML19339C492 (11) | |
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, DETERMINATION OF IGNITION PERFORMANCC CHARACTERISTICS OF GLOW PLUG HYDROGEN IGNITOR FOR WESTINGHOUSE ELECTRIC CORPORATION PITTSBURGH, PENNSYLVANIA REPORT NO. PSR-914 Issued: November 10, 1980 Prepared by: // h er[.// N/
Warner G. Daldell ! Test Engineering Supervisor Protection Systems Division Approved by: . . //,' f osepp . Gillis Manage -Explosion Protection Systems Protection Systems Division FENWAL INCORFC RATED : ASHLAND, MASSACHUSETTS Dev.s.on of Wetter Kidde & Company, Inc. 8 011180 Q7
. l l
l Report No. PS R-914 Page 1
SUMMARY
A series of tests have been conducted to ascertain the ignition capablity of a special glow plub ignitor in various mixtures of hydrogen, air and steam. Comparison of the test results, e.g. pressure and temperature transients due to com-bustion of hydrogen, with previously published information has shown good agreement. The performance of the glow plug ignitor - in igniting hydrogen mixtures has been consistent with the lit-erature and satisfactory in all respects. e l i 4 4 FENWAL INCORPORATED : ASHLAND, MASSACHUSETTS . D vis.on of Walter Kidde & Cepany, Inc.
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9 l - Report No. PSR-914 Page 2 RESULTS Test 'H Steam V 6 P, 2 No. (%) Added (Ft/S ec) (PS I) 1 12 No 0 53.00 2 8 No 0 33.00 3 8 No 0 3.00 4 12 Yes 0 66.00 ~ 5 8 Yes 0 22.60 6 12 Yes 0 72.00 7 8 Yes 0 16.25 8 12 Yes 5 67.50 9 12 Yes 10 65.00 10 10 Yes 10 53.70 11 10 Yes 5 52.70
- 12 12 Yes 10 58.75 13 12 Yes 0 60.00 14 8 Yes 0 30.00 H
2 Hydrogen Test Concentration (%) HO2 - Steam Added (Yes - No) V - Air Velocity at Glow Plug (Ft/5ecf O P- - Maximum Pressure Increase (PSI)
~ Detailed Results are Shown in Table No. 1.
l l FENWAL INCORPORATED : ASHLAND, MASSACHUSETTS I Diss.on of Walter Kidde & Cornpeny, Inc.
Report No.
, PS R-914 Page 3 I l
l i j APPARATUS 1 Tests were. conducted in a 1000 gallon tpherical test vessel ) having a pressure rating of 500 psig with the capau'lity o'f being heated to-350 F. The vessel is constructed of carbon steel with
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'a stainless steel liner.
The outside surface of the vessel was insulated with 3 inch thick fiberglass insulation. :This insulation had an aluminum foil face which-oriented away from vessel.
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I Mixing of the various gaseous components was accomplished l by means of a small shaded pole electric motor fan. This fan
! . had a 4 inch diameter blade with an air moving capacity of 200 j CFM. -
Steam was supplied to the test vessel from aa electrically heated boiler which was.self-regulated to maintain a pressure 1 of 40-50 psig.. A manually operated ball valve was positioned
!' between the boiler and the test vessel.
The temperature of the test vessel was controlled by a thermocouple controller which had its sensing element in a well i inside the vessel and approximately 18 inches from the vessel wall. The temperature of the test vessel was' sensed and recorded from a thermocouple which was approximately 12 inches below the geometric center of the vessel. ! FENWAL INCORPORATED : ASHl.AND, MASSACHUSETTS Dev.s,on of Walter K,dde & Corapeay,1% i I f-
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Report No. PS R-914 ' Page 4 r APPARATUS (Cont'd) The temperature of the test vessel wall was sensed and re-corded from a thermocouple which was silver soldered to th'e ves-
- sel inside wall at a point-approximately 12 inches below the equator.
Transient pressures were monitored by means of two strain , guage-type pressure transducers, the output of which are fed to a Consolidated Electrodynamics Corporation recording oscil-lograph. Timing markers were electronically superimposed on the oscillograph chart, providing a time base to facilitate the determination of the rate of pressure rise. One transducer was calibrated to read relatively low pressures resulting from margin-
, al pressure transients and the other was calibrated to read higher pressures _resulting from more complete combustion.
A mercury manometer was used to measure pressures during the loading of gaseous components by the partial pressure method. 1 Samples for gas chromatograph analysis were taken from the test vessel, through a cooling / condensing chamber into a 500 ML glass sample bulb. A vacuum pump and various valves were used so as to be able to draw the sample first into thc ccoling/ condensing chamber and then into the glass sample bulb.
* , 4 Air flow across the glow plug (when specified) was provided by a small shaded pole motor electric fan placed on an adjustable horizontal mount.
9 FENWAL INCORPORATED : ASHLAND, MASSACHUSETTS Dividon of Walter Kidde & Cornpeny, Ir.c. i
Report No. PSR-914 Page 5 APPARATUS (Cont'd) , Precise positioning of the fan was done each time air flow was specified by measuring the air flow at the glow plug with an Alnor Series 6000-P Velometer and moving the fan accord'ingly. This fan had a 4 inch diameter blade with an air moving capacity of 200 CFM. The temperature of the outside wall of the glow plug box , was sensed and recorded from a tbccmocouple silver soldered - centrally'on one of the vertical box walls.
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The temperature that might be experienced by the glow plug transformer was sensed and recorded from a thermocouple which was silver soldered to a bracket which was similar to the trans-
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former bracket and mountad inside the glow plug box in a similar ~ location. (Used in tests No. 1 and No. 2). The gas temperature of the interior of the glow plug box was sensed and recorded from a thermocouple suspended inside the box.' (Used in tests No. 3 through No. 14). All thermocouples were 24 gauge' iron constantan welded
' junction with teflon insulation.
This apparatus is shown diagramatically in Figure No. 1. e. l, FENWAL INCORPCRATED : ASHLAND, MASSACHUSETTS Dwesion of Walter Kedde & Company, Inc.
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l Report No. 4 PS R-914 Page 6 h I PROCEDURE Vessel temperature was stabilized at the specified test temperature. Barometric pressure, relative humidity and ambient temper-ature.were read and recorded. . Air, hydrogen and' steam (when specified) were added accord-ing to the appropriate partial pressure. The vessel contents were mixed for approximately five min-utes. . The gas sampling apparatus was evacuated and the pre-burn i gas sample was drawn into the cooling / condensing changer and held for 2-3 minutes. The gas sample was then transferred to the glass sample bulb. The mixing fan was stopped for approximately two minutes. The glow plug was energized. The post-burn gas was sampled in the same manner as pre-
- viously' described. ..'4 I
The pre-burn.and post-burn gas samples were analized by 4
. laboratories having gas chromotography capability. Gases from i
4 S \ FENWAL INCORPORATED : ASHLAND. MASSACHUSETTS D.v;s.on of Wetter EdJe & Compeny, Inc.
Report No. PS R-914 Page 7 PROCEDURE (Cont'd) tests No. 1 through test No. 5 were analized by: Arnold Green Testing Labs Inc.
- 6 Huron Drive Natick, Massachusetts Gases from tests No. 6 through test No. 14 were analized by: -
Dynatech R/D Company 99 Erie Street Cambridge, Massachusetts
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l i FENWAL INCORPORATED : ASHLAND, NASSACHUSETTS Dev s.on of Wal*er Kidde & Company. lac.
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. s Report No. PS R-914 Page 9 Legend for Table No. l
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Hydr gen Test Concentration (%) 2 TV - Vessel Test Temperature t F) V - Air Velocity At Glow Pub (Pt/S ec) Baro - Larometric Pressure (mmHg) R/H - Relative Humidity (%) T amb - Ambient Temperature ( F) P air - Partial Pressure (mmHg) Of Air Loaded
. _ _ PH 2 Partial Pressure (mmHg) of Hydrogen Loaded PHO2 -
Partial Pressure (mmHg) of Steam Loaded Ty - Glow Plug Box External Wall Maximum Temperature ( F)
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T 2 Vessel Internal Wall Maximum Temperature (OF) T 3 Glow Plug Box Internal Maximum Temperature (OF) T - Vessel Air Maximum Temperature ( F) 4 Tign - Time From Energizing Glow Plug to Ignition (Sec) Tp - Time From Ignition to Maximum Pressure (Sec)
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Maximum Pressure Increase (psi) Hp - Pre-burn Hydrogen Concentration (%) Np - Pre-burn Nitrogen Concentration (%) Op - Pre-burn Oxygen Concentration (%) Ha - Post-burn Hydrogen Concentration (%) Na - Post-burn Hitrogen Concentration (%) Oa - Post-burn Oxygen Concentration (%) , Su - Burning Velocity (Cm/Sec) s FENWAt. INCORPORATED : ASHLAND, MASSACHUSETTS D.wis.on of Walter K,.kie & Comp.ny, Inc.
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