memoria calculos inst. sanitarias

7/30/2019 Memoria Calculos Inst. Sanitarias

1/11

II. MEMORIA DE CALCULOS

2.1. CALCULO MAXIMA DEMANDA SIMULTANEA

A ). METODO DE HUNTER

PISO APARATOS CANTIDAD U.H. TOTAL

Inodoro 3 3 9.00Lavatorio 3 1 3.00

Ducha 2 2 4.00

Lavadero 2 3 6.00

Grifo jardin 3 0.75 2.25

24.25

Inodoro 3 3 9.00

Lavatorio 3 1 3.00

Ducha 2 2 4.00

16.00

Inodoro 3 3 9.00

Lavatorio 3 1 3.00Ducha 2 2 4.00

16.00

Inodoro 3 3 9.00

Lavatorio 3 1 3.00

Ducha 2 2 4.00

16.00

Inodoro 1 3 3.00

Lavatorio 1 1 1.00

Ducha 1 2 2.00

Lavadero 1 3 3.00

9.00

81.25

De la tabla N 3, se tiene que la Mxima Demanda Simultnea es:

M.D.S. = 1.46 lt/seg

B) . METODO DE DOTACION PERCAPITA

DATOS:

Dotacin por Persona = 150 lt/hab/da

N de Habitaciones = 19 und.

N personas x habitacin 2 und.

M.D.S. = (N Hab * N PersoxHab.)*(Dotacin)


C). CALCULO DE VOLUMEN DE CONSUMO DIARIOComparando los resultados de M.D.S. de ambos metodos escogemos el mayor


Volumen de Consumo Diario (Vcd)

M.D.S. = Vcd

2.5 horas

IPISO

SUB TOTAL U.H.

2PISO

SUB TOTAL U.H.

3PIS

O

SUB TOTAL U.H.

4PISO

SUB TOTAL U.H.

AZOTEA

SUB TOTAL U.H.

TOTAL U.H.

2.5 horas


2/11

Vcd = 13140.00 lt

2.2. DISEO DE TUBERIA DE ALIMENTACION

Datos :

PM = 15.00 m.c.a. PM = Presin en la MatrizHT = 0.80 m HT = Desnivel entre la red matriz y el medidor

L = 4.00 m. L = Longitud de la red Matriz al Medidor

Ps = 2.00 m.c.a. Ps = Presin mnima de salida (RNE)

A) . CALCULO DEL VOLUMEN DE LA CISTERNA Y DEL TANQUE ELEVADO

Vcisterna = 9.86 m3

Vtanque elevado= 1/3 Vcd

V T.E. = 4.38 m3

Q cisterna = Vcisterna / T 4 h < T < 6 h

Qcisterna = 0.55 lt/seg

B) . CALCULO DE PERDIDAS DE CARGA POR FRICCION (Hf )

PM = HT + Hf + Ps

Hf = 12.20 m.c.a.

C). CALCULO DEL DIAMETRO DEL MEDIDOR

Hfm = 0.5 Hf

Hfm = 6.10 m.c.a.

Q = 0.55 lt/seg

Q = 0.55 * 15.8 = 8.65 gpm

Hf = 8.723 psi

Hfm segn tabla :

Diametro

5/8" 5.5 psi

3/4" 1.8 psi

Luego elegimos D=5/8" cuyo Hfm segn tabla es de = 5.5 psi = 3.85 m.c.a

Luego tendremos que el dimetro del medidor ser:

fm = 5/8 "Luego la perdida de carga ser:

Hf = 12.2 m - 3.85 m

Vcisterna = 3/4 Vcd

Hfm

Hf = PM - HT - Hs


3/11

Hf = 8.35 m.c.a.

D) CALCULO DEL DIAMETRO DE LA TUBERIA DE ALIMENTACION

Asumimos:

f = 3/4 "

Qcisterna = 0.55 lt/segC H = 140.00

Perdidas locales:

- 02 Valvula Compuerta = 0.30

- 01 Codo de 45 = 0.30

L eq = 0.60 m.Lt = L + Leq

Lt = 10.60 m.

Perdida de carga real

Hf real =

Hf real = 2.60 m.c.a

Hfreal < Hf

2.6


4/11

Hfi = (perdida carga tub. impulsin)

Hfi = 1.47 m

Hft = 1.49 m.

HDT = 19.49 m.

P = 0.26 HP

Luego la bomba sera de una potencia de: 1/2 HP

2.5. CALCULO DIMENSIONES DE LA CISTERNA Y TANQUE ELEVADO

Cisterna

Relacion entre a y b:

a/L = 2/3

3a =2L

Hu < 2.00 m.

Vc = 9.86 m3

Vc = a*L*Hu

Vc= 2/3(L2)Hu

Para:

L = 2.85 m.

Tendremos:

Hu= 1.82 m.a = 1.90 m.

Hl = 0.45 m.

Tanque Elevado

Recomendacin la seccion debe ser cuadrada.

Vte= a*a*Hu

Vte= 4.38 m3

Para:

a = 2.00 m.

Tendremos:

Hu= 1.10 m.a = 2.00 m.

Hl = 0.45 m.

107

x (1.25*S) x Q1.85

5.813*(CH)1.85

x(D)4.87

Hl

Hu

a

L

a

a

Hu

Hl


5/11

2.6. CALCULO TUBERIAS DE ALIMENTACION

DATOS:

Q = 1.46 lt/segPs = 2.00 m.c.a.

Punto Mas desfavorable "C":

Smax = (Hc - Ps)/Le

Hc = 2.6+3.6+0.10= 6.3

Le = 5.5+2.6+1.70= 9.8

S max = 0.37 m/m

A. CALCULO TUBERIAS DE ALIMENTACION

TRAMO ABCH = 140 pie /seg H = 4.3 m

Q = 1.46 lt/segf = 1 1/2 "S = hf = S x L

S = 0.05 m/m

hf = 0.27

PRESION EN B:

PB = 4.03 > 2.00 m.c.a. OK!PB = H - hf

107

x Q1.85

5.813*(CH)1.85

x(D)4.87

Q

R

1.6

0

2.6

0

2.6

0

2.7

5

2.6

0

2.6

0

24 U.H

18 U.H

12 U.H

6 U.H

6 U.H

6 U.H

6 U.H

6 U.H

81.25 U.H

57.2

5

U.H

38.25 U.H

32.25 U.H

26.25 U.H

20.25 U.H

14.25 U.H

19 U.H

16 U.H

12 U.H

8 U.H

4 U.H

3.75 3.48 2.40 3.25 2.35 3.20

6 U.H

3 U.H

4 U.H

4 U.H

4 U.H

6 U.H

4 U.H

6 U.H

6 U.H

0.75 U.H13.50 U.H P

O

N

M

L

K

J

I

H

G

F

E

D

C B

A


6/11

TRAMO BQ

CH = 140 pie /seg PB = 4.03 m

Q = 1.22 lt/segf = 1 1/2 "L = 0.98HfBQ = 10 x S x Q

.S = 0.98 * 1.2 * 0.001

S = 0.001176

HfBQ = 0.04 m

PRESION EN Q:

PQ = PB - HfBQ

PQ = 3.99 > 2.00 m.c.a. OK!

TRAMO QC

CH = 140 pie /seg PQ = 3.99 m

Q = 0.52 lt/segf = 1 "L = 5.85

HfQC = 10 x S x Q.

S= 5.85 * 1.2 * 0.001

S = 0.00702

HfQC = 0.39 m

PRESION EN C:

PC = PQ - HfQC

PC = 3.61 > 2.00 m.c.a. OK!

TRAMO CD

CH = 140 pie /seg PC = 3.61 m

Q = 0.46 lt/segf = 3/4 "S = 2.60 * 1.2 * 0.001

HfCD = S = 0.00312

H piso = 2.60 m

HfCD = 0.55 m

PRESION EN D:

PD = PC + H piso - HfCD

PD = 5.65 > 2.00 m.c.a. OK!

TRAMO DE

CH = 140 pie /seg PD = 5.65 m

Q = 0.38 lt/segf = 3/4 "S=2.60*1.2*0.001

HfDE = S = 0.00312

H piso = 2.60 m

HfDE = 0.39 m

5.813*(CH)1.85

x(D)4.87

5.813*(CH)1.85

x(D)4.87

107x S x Q

1.85

5.813*(CH)1.85

x(D)4.87

107x S x Q

1.85

5.813*(CH)1.85

x(D)4.87


7/11

PRESION EN E:

PE = PD + H piso - HfDE

PE = 7.86 > 2.00 m.c.a. OK!

TRAMO EF

CH = 140 pie /seg PE = 7.86 m

Q = 0.29 lt/segf = 3/4 "S=2.60*1.2*0.001

HfEF = S = 0.00312

H piso = 2.60 m

HfEF = 0.24 m

PRESION EN F:

PF = PE + H piso - HfEF

PF = 10.22 > 2.00 m.c.a. OK!

TRAMO FG

CH = 140 pie /seg PF = 10.22 m

Q = 0.18 lt/segf = 1/2 "S=2.75*1.2*0.001

HfFG = S = 0.0033

H piso = 2.75 m

HfFG = 0.74 m

PRESION EN G:

PG = PF + H piso - HfFG

PG = 12.23 > 2.00 m.c.a. OK!

TRAMO QR

CH = 140 pie /seg PQ = 3.99 m

Q = 0.99 lt/segf = 1 "L = 0.14

S=0.14*1.2*0.001

HfQR = S = 0.000168

HfQR = 0.03 m

PRESION EN R:

PR = PQ - HfQR

PR = 3.96 > 2.00 m.c.a. OK!

5.813*(CH)1.85

x(D)4.87

107

x S x Q1.85

5.813*(CH)1.85x(D)4.87

107

x S x Q1.85

5.813*(CH)1.85

x(D)4.87

107

x S x Q1.85


8/11

TRAMO RH

CH = 140 pie /seg PR = 3.96 m

Q = 0.79 lt/segf = 1 "S=2.60*1.2*0.001

HfRH = S = 0.00312

H piso = 2.60 m

HfRH = 0.37 m

PRESION EN H:

PH = PR + H piso - HfRH

PH = 6.19 > 2.00 m.c.a. OK!

TRAMO HI

CH = 140 pie /seg PH = 6.19 m

Q = 0.68 lt/segf = 1 "S=2.60*1.2*0.001

HfHI = S = 0.00312

H piso = 2.60 m

HfHI = 0.28 m

PRESION EN I:

PI = PH + H piso - HfHI

PI = 8.51 > 2.00 m.c.a. OK!

TRAMO IJ

CH = 140 pie /seg PI = 8.51 m

Q = 0.54 lt/segf = 3/4 "S=2.60*1.2*0.001

HfIJ = S = 0.00312

H piso = 2.60 m

HfIJ = 0.75 m

PRESION EN J:

PJ = PH + H piso - HfIJ

PJ = 10.36 > 2.00 m.c.a. OK!

TRAMO JK

CH = 140 pie /seg PJ = 10.36 m

Q = 0.42 lt/segf = 3/4 "S = 2.75 * 1.2 * 0.001

5.813*(CH)1.85

x(D)4.87

107

x S x Q1.85

5.813*(CH)1.85

x(D)4.87

107

x S x Q1.85

5.813*(CH)1.85

x(D)4.87

107

x S x Q1.85


9/11

HfJK = S = 0.0033

H piso = 2.75 m

HfJK = 0.50 m

PRESION EN K:

PK = PJ + H piso - HfJK

PK = 12.62 > 2.00 m.c.a. OK!

TRAMO BL

CH = 140 pie /seg PB = 4.03 m

Q = 0.61 lt/segf = 1 "L = 6.14

HfBL = S = 0.0072

HfBL = 0.53 m

PRESION EN L:

PL = PB - HfBL

PL = 3.50 > 2.00 m.c.a. OK!

TRAMO LM

CH = 140 pie /seg PL = 3.50 m

Q = 0.61 lt/segf = 1 "S=2.60*1.2*0.001

HfLM = S = 0.00312

H piso = 2.60 m

HfLM = 0.23 m

PRESION EN M:

PM = PL + H piso - HfLM

PM = 5.87 > 2.00 m.c.a. OK!

TRAMO MN

CH = 140 pie /seg PM = 5.87 m

Q = 0.5 lt/segf = 3/4 "S=2.60*1.2*0.001

HfMN = S = 0.00312

H piso = 2.60 m

HfMN = 0.65 m

PRESION EN N:

S=6.14*1.2*0.001

107x S x Q

1.85

5.813*(CH)1.85

x(D)4.87

107x S x Q

1.85

5.813*(CH)1.85

x(D)4.87

10 7 x S x Q 1.85

5.813*(CH)1.85

x(D)4.87

107x S x Q

1.85

5.813*(CH)1.85

x(D)4.87


10/11

PN = PM + H piso - HfMN

PN = 7.83 > 2.00 m.c.a. OK!

TRAMO NO

CH = 140 pie /seg PN = 7.83 m

Q = 0.38 lt/segf = 3/4 "S=2.60*1.2*0.001

HfNO = S = 0.00312

H piso = 2.60 m

HfNO = 0.39 m

PRESION EN O:

PO = PN + H piso - HfNO

PO = 10.04 > 2.00 m.c.a. OK!

TRAMO OP

CH = 140 pie /seg PO = 10.04 m

Q = 0.25 lt/segf = 3/4 "S=2.60*1.2*0.001

HfOP = S = 0.0033

H piso = 2.75 m

HfOP = 0.19 m

PRESION EN P:

PP = PO + H piso - HfOP

PP = 12.60 > 2.00 m.c.a. OK!

B. CUADRO DE RESUMEN

RANGO DE LA VELOCIDAD

V min = 0.6 m/s

V lmite:

f (") V lmite

1/2 1.900

3/4 2.3001 2.480

1 1/4 2.850

1 1/2 3.050

TRAMO LONG. L.equi U.H. Q (lt/seg) f (") Hf Presin Velocidad

5.813*(CH)1.85

x(D)4.87

107

x S x Q1.85

5.813*(CH)1.85

x(D)4.87

107

x S x Q1.85


11/11

AB 4.3 5.16 81.25 1.46 1 1/2 0.27 4.03 1.28

BQ 0.98 1.18 57.25 1.22 1 1/2 0.04 3.99 1.07

QC 5.85 7.02 19.00 0.52 1 0.39 3.61 1.03

CD 2.60 3.12 16.00 0.46 3/4 0.55 5.65 1.61

DE 2.60 3.12 12.00 0.38 3/4 0.39 7.86 1.33

EF 2.60 3.12 8.00 0.29 3/4 0.24 10.22 1.02

FG 2.75 3.30 4.00 0.18 1/2 0.74 12.23 1.42

QR 0.14 0.17 38.25 0.99 1 0.03 3.96 1.95

RH 2.60 3.12 32.25 0.79 1 0.37 6.19 1.56

HI 2.60 3.12 26.25 0.68 1 0.28 8.51 1.34

IJ 2.60 3.12 20.25 0.54 3/4 0.75 10.36 1.89

JK 2.75 3.30 14.25 0.42 3/4 0.50 12.62 1.47

BL 6.14 7.37 24.00 0.61 1 0.53 3.50 1.20

LM 2.60 3.12 24.00 0.61 1 0.23 5.87 1.20

MN 2.60 3.12 18.00 0.50 3/4 0.65 7.83 1.75

NO 2.60 3.12 12.00 0.38 3/4 0.39 10.04 1.33

OP 2.75 3.30 6.00 0.25 3/4 0.19 12.60 0.88

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