螺旋折流板换热器的开发与研究Ⅱ

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2024-09-11 21:32 | 0 | 0 | 页数: 3 | 大小: 90 KB

1 8   3       V o l . 1 8   N o . 3 1 9 9 8 9 J O U R N A L   O F   F U S H U N   P E T R O L E U M   I N S T I T U T E     S e p . 1 9 9 8 ( )           ( , 1 1 3 0 0 1 )     , , , , , , 2 . 4 , , , 广   ;   ;     T Q 0 5 1 . 5 1   , [ 4 ] , , , 线 2   2 . 1   5 . 4 6 m 3 / h , , : 7 0 ;   ρ = 9 7 7 . 8 k g / m 3 ;   C p = 4 . 1 7 8 k J / ( k g · K ) ; λ = 6 6 . 7 6 × 1 0 - 2 W / ( m · K ) ;   μ = 0 . 4 0 6 1 × 1 0 - 3 P a · s ;   P r = 2 . 5 4 :     R e = d u ρ μ = 4 × 9 7 7 . 8 × 1 0 3 × 5 . 4 6 π × 5 × 3 6 0 0 × 0 . 4 0 6 1 × 0 . 0 1 5 = 6 2 0 2 6 : α i = 0 . 0 2 3 λ d i R e 0 . 8 P r 0 . 3 = 0 . 0 2 3 × 6 6 . 7 6 × 1 0 - 2 0 . 0 1 5 ( 6 2 0 2 6 ) 0 . 8 ( 2 . 5 4 ) 0 . 3 = 9 2 3 9 . 8 W / ( m 2 · K ) : 3 0 ;   ρ = 9 9 5 . 7 k g / m 3 ;   C p = = 4 . 1 7 4 k J / ( k g · K ) ; λ = 6 1 . 7 6 × 1 0 - 2 W / ( m · K ) ;   μ = 0 . 8 0 0 7 × 1 0 - 3 P a · s ;   P r = 5 . 4 2 R e H f 稿 : 1 9 9 8 - 0 4 - 0 1 : , 4 1 , , © 1994-2006 China Academic Journal Electronic Publishing House. All rights reserved. http://www.cnki.net
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        R e 1 = d 1 u 1 ρ μ = 0 . 0 5 4 × 9 9 5 . 1 0 . 8 0 0 7 × 1 0 - 3 u 1 = 6 7 1 5 1 u 1     R e 2 = d 2 u 2 ρ μ = 0 . 0 6 5 × 9 9 5 . 7 0 . 8 0 0 7 × 1 0 - 3 u 2 = 8 0 8 3 0 u 2     h f 1 = λ 1 × 2 . 7 0 . 0 5 4 × u 2 1 2 × 9 9 5 . 7 = 2 4 8 9 2 . 5 λ 1 u 2 1     h f 2 = λ 2 × 3 . 7 0 . 0 6 5 × u 2 2 2 × 9 9 5 . 7 = 2 8 3 3 9 λ 1 u 2 2     ε / d 0 . 0 0 4 , λ     Q = V 3 6 0 0 ρ C p Δ t     K = Q / A Δ t m   ( A = 0 . 9 m 2 )   1 K 1 α 0 + 1 α i 2 . 2   , , 1 2 3 1   2 α 0 2 Δ Ρ             2   2 Δ Ρ 2 υ 3   , , 使 沿 , , , , , 4 3   2 α 0 2 υ             4   7 3 3                     . ( ) © 1994-2006 China Academic Journal Electronic Publishing House. All rights reserved. http://www.cnki.net
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