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r9$ws2FK67"J]:VFa* EhV***C\ pXA5[!Nu(7sQ()5:VFiEhV***Cbj,\ pFD*5AK7quF :  rBsx)tshD!3J]&":VFa <iEhV***Cbj,\ >%hDj.*+ p=!I-./ K7!(u c V rU  &sV$"F!S!4J ]:VFa-EhV***Ct pIPuv sXt V r9>ws2FK67"J]:VFa* EhV***C\ pXA5[!Nu(:H5sQ()&":VFiEhV***Cbj,\  pFD*5AK7!(uF c  r>sx)tshD!3J]&": VFa<iEhV***Cbj,\ %',*-'.*+/0-1*'-23*45*-62*+:';*<(=*+ =!I1-./ K7qu M!N!Z5!S#3=*#=!I3(3++,1-./ 5"57 J,EpU  &cD !.75'=!ICu  :  rU  & =!I+,15(1OSK7!(!Z5C6E÷  &!A7 5'=!I1-./ K7!(u ,  r  &  hDi hDa.*+ - : V k l m - :  k l m  :  kno/ m (p*++9T - , V k l m - ,  k l m  c  kno/m (p*++9T UU U B (7 U  > (:H5   '()*+> e[qrbsturv !"#$%&'()&*! \75'3456#,758555,I-D5[75(1+-./ )7#u ;u5Y#C\5]5A,7C-u :J.E(H!&6L!#?S! -uC-b7(1L55()* cu B  = δ X=)*17!<=uy  r0Bf57Cx    & X=)*=u &f57Cx0B   = λ -uC-N5-<(/.b7L55()* cu   = δ  X=)*=u &f57Cx0   = λ -UuC-b7(1L155()* cu B U = δ X=)*17!<=uy  rf57Cx    & X=)*=u &f57Cx$  U = λ  &T7)<,SL3456#C5T7,z3+5A)5H,z{-5A55()* Cu c B δ = X=)*=u &f57Cx$B  = λ U&T75+u5T7{-55()*)7#  cu  δ = X=)*=u &f57CxB  = λ &T7u3456#C5T7,z3+5A)5H,z{-5A55()*Cu c B δ = X=)*=u &f57Cx$B  = λ Bg58uC(55()*3n#DCu cu 9= δ X=)*P=u &f57CxB  = λ B  $SuC\75'CCNS3(55=55C-DC=#!L51;757 S17CC-)7#u :J.E=!% U !+',! %1*'-F*-'B-*'9G-^CD?@-ABC4D2A'E% ;<6?#7E3456#,758u m TE  rf| ∆ s357Cxt ;1!Au fuX=)*1#S=?#73456#,758s357Cx    &t ;   f αλ δ α +∑+ =    ; α u=)*17!<=L,15[7 ; α r0B357Cx    &   α u=)*17!<=L,5[7  α r357Cx    &   δ u!I3456#R%st   λ u=)*P=5[73456#Rs357Cx  &t  ∆ u5C=5=!I,1,sF Ψ rt Ψ−=∆ ts , V , ,  wpUr00 Ψ−=∆ ts : V : :  wU}UUr %3Aj_*''G/0-6CVx**'9G-AUD?@-ABC4D2A'E% C cG cGU cG  cG  -.&/0,(12,&3)$%&'()&*! ; ; ;3456# &(R5+f ;   f αλ δ α +∑+ =   f4?#G [ADRon > %'% l   ; B  = δ &f57Cx0B   = λ   = δ &f57Cx0   = λ B U = δ  &f57Cx$  U = λ   $ B 0  0B B B0   f ; ++++ = 9U  &T7)<            B δ =  &f57Cx$B  = λ   $B B B0   f &k ++ = BUB U &T75+   = δ  &f57CxB  = λ   B  B0   f && ++ = BBU  &T7            B δ =  &f57Cx$B  = λ &g  f  B  0B $B  = + + BUB B g58  9 = δ  &f57CxB  = λ   B 9 B0   f g ++ = BB $ S pcG ;17,G  pcG ;17,G  pcGU ;17,G  pcG ;17,G $ >%9G*-1A'AUD?@-ABC4D2A'E 45,&$%&'()&*! ;; ;3456# &(R5+ f4  ?#G s  t * [...]... Trang 18 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí q (kcal/h người): lượng nhiệt hiện do một người toả vào không khí trong phòng trong 1 giờ Tra bảng 2-1 TG và kĩ thuật xử lí khí thải Nguyễn Duy Động) 1,7 là hệ số điều chỉnh người Mùa đông (220C): q = 98 Kcal/h Mùa hè (34.10C): q = 6 Kcal/h Bảng 14 - Tính toán toả nhiệt do người TT Mùa 1.7 q (Kcal/h) n (người) 1 2 Đông Hè 1.7 1.7 98 9... 6 - Tính toán chiều dài khe cửa mà gió lọt qua Loai cửa Cửa mái Cửa sổ Cửa chính Chiều dài khe cửa mà gio lọt qua (m) Hướng Đông Hướng Bắc Hướng Tây 0,00 75,6 0,00 102 153 136 13,4 13 0,00 Trang 14 Hướng Nam 75,6 68 13 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí Hình 4 – Hình vẽ thể hiện hướng tác dụng của gió về mùa Đông: Đông - Bắc Lấy 65% tổng chiều dài khe cửa Bảng 7 - Tính toán tổn thất... 11 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí 3 Tổn thất nhiệt qua kết cấu : a Tổn thất nhiệt qua kết cấu bao che về mùa Đông Công thức tính toán: KC Q TT (D) = K × F × ∆t tt (Kcal/h) Trong o: K:hằng số truyền nhiệt F:Diện tích kết cấu (m2) D D ∆t tt = (t T – t N )ψ ψ : Số hiệu chỉnh kể đến kết cấu bao che, ψ = 1 => ∆t tt = (22-14,3)x 1=7,7 Trong công thức tính toán này, đối với các... phẳng bị bức xa tai thời điểm tính toán Tra bảng lúc 7h sáng vào tháng 7 theo bảng B.2.20 QCVN 02:2009 (Hà Nội) Bảng 17 - Tính toán thu nhiệt bức xạ qua kính Hướng τ 1 τ 2 τ 3 τ 4 Fcs (m2) Fcm (m2) ∑ F (m2) Đông Tây 0,541 0,541 27,3 36,4 0 0 27,3 36,4 Trang 30 qbx (kcal/m2.h) 585,23 0 kinh Q BX (kcal/h) 8643,44 0 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí Nam Bắc 0,541 0,541 18,2 40,5 19,6... thông gio – Trần Ngọc Chấn) Trong đo: γ 1 : trọng lượng riêng của không khí ở nhiệt độ 33,1 oC 33,4º C 30,4ºC γ1 = 1,15 ( kg/m3) C: tỉ nhiệt của không khí, C= 0,24 (Kcal/kgoC) tt(H) tv = t N = 33,10C tR = tvlv + .(H - 2) = 34,1+ 1,5.(11,5-2)= 48,35 0C ( CT 2-11 trang 53 sách Kĩ thuật thông gio – Trần Ngọc Chấn) Trang 35 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí β: hệ số kể đến sự tăng... bên: A = 0,35 Trang 34 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí + b, l: Bề rộng và bề dài của bể, b = 0,5 (m), l = 1 (m) + g: Gia tốc trọng trường, g = 9,81 m/s2 + Txq: Nhiệt độ tuyệt đối trong phòng, 0K Txq=273+34,1=307,1 0K + Tn: Nhiệt độ tuyệt đối của bể, 0K 3π + ϕ : Goc mở rộng của luồng không khí bị hút Đối với bể đứng độc lập, ϕ = 2 Tính toán lưu lượng hút bể ma Bảng 20 -... 6998,55 = 253038,39(Kcal/h) Trang 31 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí Chương 5: TÍNH HÚT CỤC BỘ Bao gồm: - Hút khí và nhiệt tai các lò + 1 lò nấu thép + 1 lò đúc thép - Hút bụi kim loai tai + 2 máy mài tròn + 2 máy mài phẳng + 4 máy mài sắc + 4 tang đánh bong - Hút hơi dầu tai 2 bể dầu, rửa Hút cục bộ tức là hút không khí bị ô nhiễm ngay tai nguồn phát sinh ra chúng.Công... chụp kín, ngoài mục đích hút bụi còn bảo vệ công nhân tránh các chấn thương do bụi dính vào mắt Trang 33 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí Chụp hút bụi đặt tai vị trí không ảnh hưởng đến quá trình công nghệ và thao tác của công nhân Cấu tao của chụp phải tháo lắp được dễ dàng sửa chữa thay thế Lh=n 2500.d2 m3/h Trong đo : d - đường kính đá mài, với mỗi loai máy mài thì... bên ngoài công trình III Đô i với các bể mạ: Nếu trong xưởng co nguồn tỏa chất độc hai thì ta dùng bộ phận hút trên thành để hút khí co hai tránh khí phân tán ra toàn xưởng Hút trên thành người ta bố trí dọc theo chiều dài của bể chứa rãnh hút khí co chiều cao h = 50-100 mm cách bề mặt nước một khoảng H để tránh nước trong bể bị hút vào H = (0,8: 0,10.b nhưng không nhỏ hơn 150mm Giải... đánh bong 2 4 8 14 Máy cắt tấm N475 10 2 20 15 Máy khoan để bàn 0,5 1 0,5 Tổng cộng 174,26 dc ⇒ Q TN = 0,25.860 174,26= 37465,9 (Kcal/h) Trang 17 Thuyết minh: Đô Án Kiểm Soát Môi Trường Không Khí III Tỏa nhiệt từ bề mặt thoáng bể mạ Q = n.(5,7 + 4,07.v).( tm- txq).F (W) (theo CT 2.52 sách Thiết kế thông gio công nghiệp –Hoàng Thị Hiền ) Trong đo: n - Số lượng bể ma n = 8 (bể) v – Vận tốc không