Schimb de Căldură În Regim Staționar
3
Schimb de căldură în regim staționar. Determinarea coefcienților globali de transer termic schimbătoare de căldură tubulare (țeavă în țeavă) Gm1 (kg/s) Gm2 (kg/s) t2 (int rece) ⁰C t2 ⁰C t2 ⁰C t2 ⁰C t2 ⁰C t2 ⁰C t2 (ies rece) ⁰C t1 (int c)⁰C t1 (ies c) ⁰C 0.0058 0.00 ! " # $$ $5 $5 $# % %& &$ %& 0.00#" % 0.00 ! " #.5 $ $! $" %$ %5.5 %!.5 &% %& 0.0$ 8 0.00 ! " $0 $ .5 $" $8 %% %" %".5 & %& Re Nu alfa 1 Q rece w dt Re Nu alfa2 k teor 8$0.$5 8 5.55$ %8"."& 5 $$5.$#% 0.00% !5 $5 $0%.!% #5 $$.% 8! $58."0 % #!.5#! $ !&.& 5" !.8$& 5 .!& & $ 0.55$ $" $0 .0&% $#5!.5 !# ".8&% &0".5 " $ &. #$ $".5 $0".$"$ d t med (⁰C) k exp c k exp r Q cald t w (m/s) $5.#"#$& &#% 5$#.$& 5# %88. 5 !% &$&."" 5& %.5 0.05$5 "5 $&.##&&& %8 #"!.! 8! &8.%! 5% " %.%0 "! 0.085# 8" $&." "%" #! $&8#.$ 58 !&."! &% $0#". 0" .5 0.$%%0 8$ ' 0.05 D ech$ $% Dech% &% S 0.000$$ s% 0.00$ 8& "& m 0.0%&$%%5"5 0.0&05%5&%5 0.0&""# 5
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Transcript of Schimb de Căldură În Regim Staționar
Schimb de cldur n regim staionar.Determinarea coeficienilor globali de transfer termic in schimbtoare de cldur tubulare (eav n eav)
Gm1 (kg/s)Gm2 (kg/s)t2 (int rece)Ct2 Ct2 Ct2 Ct2 Ct2 Ct2 (ies rece)Ct1 (int c)Ct1 (ies c) C
0.005830.0036791115151923244124
0.009720.003679.51316172125.526.54224
0.01380.003671013.51718222727.54324
d t med (C)k exp ck exp rQ caldDtw (m/s)
15.97914492519.1459288.3562414.775432.50.051575
14.9944428976.6386348.2652732.2076330.085987
14.737279361489.158364.76421097.30733.50.122081
ReNualfa 1Q recewdtReNualfa2k teor
810.1585.551287.745115.1920.0026515102.629511.286158.70296.596
1364.4576.814353.644130.55117103.042
1956.5697.842407.537134.39117.5107.171
A=0.05
D ech112
Dech242
S0.00011
s20.00138474
m
-0.024122575
-0.040525425
-0.0477935
tM1 CA [m2]dtm1 Ct1 CtM2 Cdtm2 Ct2 CtM3 Cdtm3 Ct3 C
170.04998719.099798728.09979915.519.0983117328.5983115.520.0225530.02255
180.04510919.994774930.99477516.519.9204806932.920481620.1584633.65846
220.03994524.145791539.1457922124.8124143940.812412125.7673842.76738
260.03633128.296664843.2966652529.0961075646.096112530.1128748.11287
260.02855927.788881746.7888822629.2935406850.293542630.0952552.09525
300.02114531.514980654.5149812931.6773957457.177429.532.8742259.87422
321.55E-0233.176748157.17674832.534.673388661.173393335.7265563.22655
