Fans – Lecture 2propeller fancentrifugalPowerPoint PresentationSlide 5Fan CurvesTotal pressure, total efficiency, static efficiency1Dr. C. L. JonesBiosystems and Ag. EngineeringFans – Lecture 2•Fan testing:2Dr. C. L. JonesBiosystems and Ag. Engineeringpropeller fantube-axial fan vane-axial fanAxial flow fans3Dr. C. L. JonesBiosystems and Ag. EngineeringcentrifugalRadial flow fansSukup literature4Dr. C. L. JonesBiosystems and Ag. Engineeringcross-flow (tangential) fans5Dr. C. L. JonesBiosystems and Ag. Engineeringmixed-flow tubular cent. fans6Dr. C. L. JonesBiosystems and Ag. EngineeringFan Curves•AMCA Handout7Dr. C. L. JonesBiosystems and Ag. EngineeringTotal pressure, total efficiency, static efficiency•Total Pressure: eqn. 5.1, pg 127•Find v: eqn. 5.2•Conversions: –1 “H2O = 249 Pa–1 ft/min = .00508 m/sec–1 lb/in^3 = 27679.9 kg/m^3–1 ft^3/min = .000471947 m^3/sec–1 HP = 745.7 Watts•Total efficiency eqn. 5.3•Static efficiency eqn. 5.4•Assume 1750 rpm•Outlet of 10” x 12”•Q = 12030 cfm•Static pressure = 2”•50 hp•Density = 3.9E-5
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