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PRACTICA Nº47
TURBOMAQUINAS CONSUMIDORAS DE ENERGIA MECANICA
UNIDAD : Bombas Centrífugas
FECHA :
CONDICIONES AMBIENTALES DEL LABORATORIO
-Temperatura: ºC
-Presión: mm Hg
ELEMENTOS MECANICOS DE LA UNIDAD
-Cuenta vueltas
-Dinamómetro
-Cronómetro
DESCRIPCIÓN DEL DESARROLLO
Calcularemos la Potencia Efectiva (exterior en el eje o al freno) de una bomba centrífuga para unas determinadas r.p.m. y caudal concreto.
Una vez obtengamos el régimen permanente, accionaremos el freno (freno Prony) con el objeto de equilibrar el par motor con lo que tomamos la lectura del dinamómetro que es de 11 N. Nos ayudaremos del cronómetro y del cuenta vueltas con el fin de determinar el número de r.p.m. con las que gira la bomba, obteniendo de esta manera 667 rev. los 15 seg. Siendo n = 2668 r.p.m.
CALCULOS
Potencia efectiva :
Pe = 2 ∏ · F · L · n / 60 = 2 ∏ · 11 · 0.179 · 2668 / 60 = 550.1 W
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Enviado por: Angel Idioma: castellanoPaís: España