UNIVERSIDAD DE COLIMA

FACULTAD DE INGENIERA MECNICA Y ELCTRICA

Profesor:

Pauries Pineda Urbina

Alumnos:

Vctor Hugo Viveros Suarez

Calculo de Cmara de Refrigeracin

Coquimatln, Colima, 7 de mayo del 2015

Planteamiento

Se calculara la capacidad de un sistema de refrigeracin para almacen de

frutas y verduras diversas, ubicado en Cancun, con una temperatura promedio

en el medio ambiente de 22.5 C (72.5 F), las dimensiones y temperaturas

requeridas en las cmaras de refrigeracin se muestran en la imagen 1.

Imagen 1

Se comienza el clculo de las cargas en las paredes.

CAMARA 1

= (645.84) (0.66) (72.5 37.4) = 14,961.53

= (1,297.062) (0.045) (72.5 37.4) = 2,048,71

= (645.84) (0.047) (68 37.4) = 928.84

= (1,297.062) (0.047) (37.4 37.4) = 0

= (10,410) (0.036) (72.5 37.4) = 13,154.076

= 31,093.156

CAMARA 2

= (775.008) (0.047) (68 41) = 983.48

= (1,556.47) (0.045) (72.5 41) = 2,206.30

= (775.008) (0.66) (72.5 41) = 16,112.41

= (1,556.47) (0.047) (37.4 37.4) = 0

= (11,187) (0.036) (72.5 41) = 12,868.06

= 32,170.25

CAMARA 3

= (645.84) (0.66) (72.5 37.4) = 14,961.52

= (1,297.062) (0.047) (37.4 37.4) = 0

= (645.84) (0.047) (68 37.4) = 928.84

= (1,297.062) (0.045) (68 37.4) = 1,786.05

= (10,410) (0.036) (72.5 37.4) = 13,154.076

= 30,830.486

CAMARA 4

0 = (775.008) (0.045) (68 41) = 941.63

= (1,556.47) (0.047) (41 41) = 0

= (775.008) (0.66) (72.5 41) = 16,112.42

= (1,556.47) (0.047) (41 41) = 0

= (11,187) (0.036) (72.5 41) = 12,868.06

= 29,922.11

CAMARA 5

0 = (775.008) (0.047) (72.5 37.4) = 1,278.53

= (1,556.47) (0.047) (41 41) = 0

= (775.008) (0.66) (72.5 41) = 16,112.41

= (1,556.47) (0.045) (68 41) = 1,891.11

= (11,187) (0.036) (72.5 41) = 12,868.06

= 32,150.11

CAMARA 6

0 = (645.85) (0.66) (72.5 37.4) = 14,961.76

= (1,297.062) (0.043) (68 37.4) = 1,706.67

= (645.85) (0.047) (68 37.4) = 928.86

= (1,297.062) (0.047) (37.4 37.4) = 0

= (10,410) (0.036) (72.5 37.4) = 13,154.076

= 30751.366

CAMARA 7

0 = (645.85) (0.66) (72.5 37.4) = 14,961.76

= (1,297.062) (0.047) (37.4 37.4) = 0

= (645.85) (0.045) (68 37.4) = 928.86

= (1,297.062) (0.043) (37.4 37.4) = 0

= (10,410) (0.036) (72.5 37.4) = 13,154.076

= 29,044.696

CAMARA 8

0 = (645.85) (0.66) (72.5 37.4) = 14,961.76

= (1,297.062) (0.047) (37.4 37.4) = 0

= (645.85) (0.043) (68 37.4) = 849.81

= (1,297.062) (0.047) (72.5 37.4) = 2,139.76

= (10,410) (0.036) (72.5 37.4) = 13,154.076

= 31,105.406

CAMARA 9

0 = (397.19) (0.047) (68 32) = 672.04

= (196.98) (0.045) (68 32) = 319.11

= (397.19) (0.047) (32 32) = 0

= (196.98) (0.045) (41 32) = 79.77

= (3,985.1) (0.036) (72.5 32) = 5,810.27

= 6,881.19

CAMARA 10

0 = (397.19) (0.047) (32 32) = 0

= (196.98) (0.045) (68 32) = 319.11

= (397.19) (0.045) (41 32) = 79.77

= (196.98) (0.047) (32 32) = 0

= (3,985.1) (0.036) (72.5 32) = 5,810.27

= 6,208.49

CAMARA 11

0 = (397.19) (0.047) (32 32) = 0

= (196.98) (0.045) (68 32) = 319.11

= (397.19) (0.045) (41 32) = 79.77

= (196.98) (0.047) (32 32) = 0

= (3,985.1) (0.036) (72.5 32) = 5,810.27

= 6,208.49

CAMARA 12

0 = (397.19) (0.047) (32 32) = 0

= (196.98) (0.043) (68 32) = 304.92

= (397.19) (0.045) (72.5 32) = 723.87

= (196.98) (0.045) (41 32) = 79.77

= (3,985.1) (0.036) (72.5 32) = 5,810.27

= 6,918.83

CAMARA 13

0 = (794.38) (0.047) (68 41) = 1,008.06

= (1,575.84) (0.045) (41 32) = 638.21

= (794.38) (0.047) (72.5 41) = 1,176.08

= (1,575.84) (0.047) (41 41) = 0

= (11,187) (0.036) (72.5 41) = 12,868.06

= 15,690.41

CAMARA 14

0 = (794.38) (0.047) (68 41) = 1,008.06

= (1,575.84) (0.047) (41 41) = 0

= (794.38) (0.045) (72.5 41) = 1,126.03

= (1,575.84) (0.045) (72.5 41) = 2,233.75

= (11,187) (0.036) (72.5 41) = 12,868.06

= 17,235.9

Para obtener la carga total del sistema de refrigeracin se suman las

cargas totales de toda la bodega, obteniendo el siguiente resultado.

= 362,210.89 BTU

Se calcula la capacidad necesaria para que el sistema de refrigeracin

opere solo 15 horas en el da.

= 362,210.89

15 = 24,147.3926

Con esta especificacin se requiere un equipo 3 toneladas para tener un

factor de seguridad de 1.5.