TAILIEUCHUNG - FURNACES Carroll Cone Toledo, Ohio P2

A new and increasing responsibility of furnace designers and operators is to provide controls for toxic, combustible, or particulate materials in furnace flue gases, to meet federal or local standards for air quality. | FLUID FLOW 1485 Fig. Gas radiation Hr and convection Ho coefficients for flue gas inside radiant perature. The gas radiation factor depends on temperature and inside diameter. The effect of flame luminosity has not been considered. FLUID FLOW Fluid flow problems of interest to the furnace engineer include the resistance to flow of air or flue gas over a range of temperatures and densities through furnace ductwork stacks and flues or recuperators and regenerators. Flow of combustion air and fuel gas through distribution piping and burners will also be considered. Liquid flow of water and fuel oil must also be evaluated in some furnace designs but will not be treated in this chapter. To avoid errors resulting from gas density at temperature velocities will be expressed as mass velocities in units of G Ib hr ft2. Because the low pressure differentials in systems for flow of air or flue gas are usually measured with a manometer in units of inches of water column in. H2O that will be the unit used in the following discussion. The relation of velocity head hv in in. H2O to mass velocity G is shown for a range of temperatures in Fig. . Pressure drops as multiples of hv are shown for some configurations used in furnace design in Figs. and . The loss for flow across tube banks in multiples of the velocity head is shown in Fig. as a function of the Reynolds number. The Reynolds number Re is a dimensionless factor in fluid flow defined as Re DG p. where D is inside diameter or equivalent dimension in feet G is mass velocity as defined above and p is viscosity as shown in Fig. . Values for Re for air or flue gas in the range of interest are shown in Fig. . Pressure drop for flow through long tubes is shown in Fig. for a range of Reynolds numbers and equivalent diameters. Preferred Velocities Mass velocities used in contemporary furnace design are intended to provide an optimum balance between construction .

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.