Formulas y ejercicios Flashcards

1
Q

Renouard Cuadatica (Perdida carga de gas) y NAG

A

P1 Cuad - p2 cuad = 48,6 x dens rel x Largo eq x caudal a la 1,82 x Diametro int a la -4,82
Menor a 20%

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2
Q

Corriente de carga

A

POT = Raiz de 3 x U X I x cos fi

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3
Q

I adm

A

= I tabla x correccion temp x correccion de agrup

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4
Q

Caida de tension

A

Delta U = k I L (0,85 R + 0,53 X)

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5
Q

Seccion minima

A

= Icc Raiz(tiempo cc) / C (115 gralmente)

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6
Q

DBO

A

= Conc DBO X Superficie X Caudal

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7
Q

Caudal para incendio

A

Q = gpm / pie cuadrado (de tabla) X Superficie

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8
Q

Nro de rociadores

A

Q / gpm por rociador

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9
Q

Q total agua incendio

A

Q cacl + Q gabinetes (250)

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10
Q

Volumen tanque incendio

A

V= Qtot x (3,785 L/min gpm) x t

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11
Q

Tiempo de proteccion catodica

A

t = peso / (K x I)

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12
Q

Caudal de gas

A

=Capacidad calorifica por hora / Poder calorifico del gas

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13
Q

Dint

A

= Dext - 2 x espesor

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14
Q

Perdida de carga liquidos

A

Hf = f L/D v^2/2g

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15
Q

Reynolds y rug rel

A
Re= ro x v x D / Mu
e = E/D
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16
Q

Caudal AC

A

Q=SUMA Qi * 0,8

17
Q

Volumen de pulmon AC

A

V = (Q x t) / (Pmax - Pmin)

18
Q

Espesor ideal de cañeria

A

t = (P X D) / (2 X S X E + P X Y) + A

19
Q

Pasos dimensionamiento y alimentadores

A
1- Sacar Iadm
2- Seleccionar cable
3 - Corregir por temp y agrupamiento
4 - Verificar sino verifica volver a 2
5 - Controlar que la seccion sea mayor a la minima para CC
6- Calcular la caida de tension
20
Q

Carga dinamica total de bomba

A

CDT = Delta H + Delta P + Delta Hfriccion

21
Q

Corrosion ejercicio

A
Pot natural: Vnat
Pot de proteccion: Von
Pot de polarizacion: Voff
Drenaje de corriente: I
Crieterios de proteccion catodica:
Voff < -850mV
Vnat - Voff > 100 mV
Von < -850 Solo aplicable si se conoce la caida IR