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Show 12 Table 2. Specifications of the C A G C T research furnace Feature 1. Furnace chamber (a) Overall cavity dimensions (b) Front (blind) endwall (c) Burner (left) sidewall (d) Blind (right) sidewal (e) Rear (exhaust) endwall (0 Combustion chamber coordinates, (x, y, z) (g) Combustion chamber modification 2. Burners (a) Three sidewall burners (B1, B2, B3) (b) Burner Bl (c) Burner B2 (d) Burner B3 (e) Nine roof burners (B4-B12) 3. Heat sink (furnace load) (a) Available cold sink (b) Screened sink 4. Refractories (a) Roof, front endwall & sidewalls (b) Rear endwall (c) Floor 5. Recuperators 6. Fixed diagnostics (a) Flow and temperature of combustion air and natural gas (b) Flame detection (c) Sink heat fluxes (d) Refractory surface temperatures (e) Static pressure at wall (f) Sight ports (windows) (g) Data acquisition 7. Access for probing (a) Spot ports (transversely non-traversable) (b) Nearfield port (transversely traversable) 8. Stack 9. Housing Specifications 1 m high x 3 m wide x 4.5 m long 1 m high x 3 m wide 1 m high x 4.5 m long 1 m high x 4.5 m long 1 m high x 3 m wide (x, y, z) = (0, 0, 0) at front, bottom, left corner, with x normal to sidewalls, y normal to endwalls, z normal to floor Internal refractory brick walls can be erected, creating, for example, a tunnel combustion chamber for burner Bl Maximum size ca. 0.5 M W each Axis through (x,y, z) = (0, 0.75 m, 0.5 m) Axis through (x,y, z) = (0, 1.75 m, 0.5 m) Axis through (x, y, z) = (0, 2.75 m, 0.5 m) Maximum size ca. 0.25 M W each. Not used in present work Combustion chamber floor consists of 34 water-cooled, instrumented sink panels, most 0.5 m x 1 m, some 0.5 m x 0.5 m, totalling 32.1 % of the cavity surface Any selection of sink panels may be insulated; see item 4(c) 305 m m thick, of mineral-fiber folded-blanket blocks, 128 kg/m3 113 m m thick, of brick, 2110 kg/m3, with 24 uniformly spaced 76.4 m m x 115 m m openings for passage of exhaust gas to plenum chamber and on to stack In present work, 25 m m thick mineral-fibre blanket, 96 kg/m3, laid over as many sink panels as desired 3 units in parallel (ceramic-block, cross-flow heat exchangers), partly or wholly by-passable Orifice meters, thermocouples, pressure transducers, integrated into combustion control and monitoring system u.v. flame detectors, two per burner (one for the pilot and one for the main flame) Flow meters and thermocouples measuring cooling-water flows through sink panels and input/output temperatures 44 thermocouples (23 in roof, 3 in burner sidewall, 18 in blind sidewall) 4 static pressure taps (one at each corner of roof) Can also measure static pressure at any probe port (34 available) 4; one in blind sidewall opposite each burner, one at center-right of front endwall, looking across furnace Data acquisition board, with several hundred channels, and a dedicated PC computer 34; 22 in roof, 12 in blind sidewall The left half of the front endwall can be opened and a traverse system deployed which provides a seal (and insulation as required). The region x = 0-1.5 m, v = 0-1.5 m, and z = 0-1 m can then be probed, comprising the greater part or all of the combustion zone of burner Bl (or burner B4). Air-jet driven ejector ("venturi") stack, allowing operation of furnace at positive or negative draft Installed in a dedicated building, the C A G C T Furnace Research Laboratory (FRL) 31 |