TAILIEUCHUNG - Fans and Blowers

This session is intended to discuss the following:Types and working principle of fans and blowers, applications of various fans and blowers, pressure rise flow coefficient and efficiency Pressure rise, flow coefficient and efficiency, velocity triangles, performance characteristics, fan laws | PEMP RMD 2501 Fans and Blowers Session delivered by: Prof. Q H Prof . Nagpurwala 06a © . Ramaiah School of Advanced Studies 1 Session Objectives PEMP RMD 2501 This session is intended to discuss the following: • Types and working principle of fans and blowers • Applications of various fans and blowers • Pressure rise flow coefficient and efficiency rise, • Velocity triangles • Performance characteristics • Fan laws 06a © . Ramaiah School of Advanced Studies 2 What is a Fan? PEMP RMD 2501 Any device that produces a current of air by the movement of broad surfaces can be called a fan. Fans fall under the general classification of “turbomachinery” turbomachinery and have a rotating impeller at least partially encased in a stationary housing. Fans are similar in many respects to pumps. Both are turbomachines that transfer energy to a flowing fluid. It is easy to distinguish between fans and pumps: pumps handle liquids; fans handle gasses. Broadly speaking, the function of a fan is to propel, displace, or move air or gas. 06a © © . Ramaiah School of Advanced Studies M. S. Ramaiah School of Advanced Studies, Bangalore 3 Fans, Blowers and Compressors PEMP RMD 2501 Fans, bl F blowers and compressors are diff d differentiated b the method used to i d by h h d d move the air, and by the system pressure they must operate against. Difference Between Fans, Blower and Compressors Difference Between Fans Blower and Compressors Equipment Specific Ratio Pressure Rise (mmWC) Fans Up to Up to 1 11 1136 Blowers to 1136 to 2066 Compressors More than More than As per American Society of Mechanical Engineers (ASME) the specific ratio – the ratio of the discharge pressure to the suction pressure – is used for defining the fans and blowers 06a © © . Ramaiah School of Advanced Studies M. S. Ramaiah School of Advanced Studies, Bangalore 4 Components of Fan/Blower System PEMP RMD 2501 Turning Vanes (typically

• Năng lượng
• Fans and Blowers
• Blowers and Compressors
• Components of Fan
• Parts of a Fan
• Centrifugal Fans