| OCR Text |
Show , , , ~I t 0.' \ O.S .a...:.. 0.4 I :lI" It =. 0.2 .a...:. . I . ) .. ~"t. , '-'~~.-!'-I- / r,~ ~-0.5J5 ,. (Hl8~4) / I'~ R .. ~riii - 1.42 (Vr'" _ I-- .. I I OVB>j 'Fleld of Operation 0.1 1 S • 10 20 40 SO WB Case a) NUB = O.535ReB··· • ~r··f (5) NUB = h<>.t~ B Case b) (HJ··.. NUB = 1.42ReB ..... Pr··" B (6) Fig. 16 Convection Heat Transfer of Impingement ~O~---------------------------' • PolDt M Combuatlon &at 15)(1 Offal /hr' Bumer B- 325mm I Cu. a) I ! 1.0J.--.~--~.....:1~Fe::":::::~""""o-------1 ~ ~~r':-~:~ ~ /1' .~.- -: r/ /.- ----.I-..- .-.'.- '_--Tw.--.-. .-.. .,-... ~ o~ ____ '~I~: __ ~~o~----~lft°ft°~t~--t4 \ 1.0 V-o.12 6 toO't ; 0 1000t ~ V 1100t -: I Cu. b) I <> 1200 t :i L-_'_~~A~_~_~-~--' ~~~ __~ ~~--~ 1.0 0-'- .sr.. ~ g v" .. ",...,.... .~ 3 o Fig.ll . I I 50 100 150 0.1:.11. p,.heaUDI TIID. (IDID) Comparion of 'Mea~ured Heat Flux and Calculated Heat Flux Slab Region <D Heat Balance Water-cooled Roller High Temperature Aadlallon H.at ~ana'.r Cony.cllon H •• , ~.n.l.r Low Temperature Radiation Heat Transfer Qr (keal/hr) Qr = 4.88~1j {( 2;t6TJ )4_ (2~b1/1)4} AI (]) ( I, I-Aame and Gas, Slab, ) Furnace body Roller #II ; VIew Fec111f (-) Coiwection Heat ltansfer Qc (keal/hr) TI, TI ; Temp.ratura rC) Qc =.h.( Tf- TI) • AI ( I""Slab ) (4) AI; Heallnt Surf.ca Alaa (",.) T,: Tempera ... a 01 ~ (,e) " ; c:-...eUon H .. I nenat.r Coelflc:lent (keal/",' .... -C) Fig.14 Heat Transfer Model in GEH I Wall Jet Region I Slab Impingement Region -m Burner Qcv= hcv • (Tf - Ts) • As Fig. 1 ~ hcv: Convection Heat Transfer Coefficient (kca.2/ rrlhr·C) Tf ; Temperature of Flame rC} Ts; Temperature of Slab Surface (,C) As; Heating Surface Area (rrl) Convection Heat Transfer Model |
