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How to calculate the number of ventilation times in industrial production workshops

How to calculate the number of ventilation times in industrial production workshops(necessary for selecting new wind cabinets)

Reference to the number of ventilation times in industrial production workshops:

1. Definition of the number of ventilation times: The number of ventilation times(times / hours) = the total indoor air supply(m/ H) (indoor area(M2) × indoor height(M));

2. The general environment requires a change of wind of 25 to 30 hours/hour;

3. In densely populated public places, the amount of wind required is 30 to 40 / hour;

4. There are densely populated and high-temperature places or production workshops, requiring a change of wind of 40 to 50 / hour;

5. High temperature and severely contaminated production workshops require 50 to 60 air exchange hours;

6. In the humid South, the number of ventilation should be increased appropriately, while in the hot and dry North, the number of ventilation can be reduced appropriately.

Regarding clean room workshop air change times should also refer to clean room grade reference table.

The calculation method of the number of new wind cabinets:

1. The number of units used = the volume of the site × the number of times of air exchange and the actual air supply of the unit;

2. The post wind should be selected according to the actual situation, and the total wind volume can be appropriately reduced;

3. The indoor air supply pipeline must match the type of air conditioner and design a suitable air supply pipeline according to the actual installation environment and the number of air outlets.

4. Definition of the number of ventilation times: Number of ventilation times(times / hours) = total indoor air supply(M3 / H) /(indoor area(M2) * indoor height(M)

Number of units used =(site volume * number of ventilation times) / actual wind volume of unit

The post wind should be selected according to the actual situation, and the total wind volume can be appropriately reduced.

工业厂房换气次数参考表:

Type of building

Breathing times per hour

Sick room

2---4

Office.

2---5

Spinning Factory

3---7

Teaching Room

3---8

Dining Room

3---8

Warehouse

3---8

Food Factory

3---8

Take the waiting room.

4---12

Garage.

4---10

Sports Museum

4---15

Mechanics

4---15

Collections

5---10

Food room

5---10

Washing room

5---10

Shipyard.

5---10

Public toilets

5---15

Photo library

6---10

Rest room.

6---10


Type of building

Breathing times per hour

Smoke class

6---12

Chemical Laboratory

6---15

A kitchen

7---15

Dyeing whole factory

8---15

Disinfecting room.

8---15

Paper Factory

8---15

bus

8---20

Dry plant

10---20

Repair factory

10---20

Generator room

10---20

Forging Factory

10---30

A Foundry

10---30

Washing Factory

10---30

Paint Factory

10---40

Electroplating plant+

12---20

Boiler Factory

15---30

Enchantment Room

15---40

Glass Factory

20---40



Example of the calculation of the number of new winds:

A computer room area S = 60(M2), net height H = 3(M), person N = 10(person)

1. If calculated according to the amount of new wind required per person, the new wind volume Q1 = n.q = 10 * 70 = 700(M3 / H). (Take the new wind quantity Q = 70(M3 / H) per person);

2. If the number of new air changes in the room is calculated, the number of new air changes in the room P = 5(sub/h), the new air volume Q2 = q.n = 5 * 60 * 3 = 900(M3 / H).

Due to Q2 &;; Gt; Q1, so Q2 is taken as the basis for setting options.

Ventilation times of residential and public buildings:

Room Name

Number of ventilation times(times / H)

Room Name

Number of ventilation times(times / H)

Residential, dormitory bedroom

General hotel, hotel bedroom

A fine hotel, a hotel bedroom.

Residential kitchen

Shop Office

File Library

Waiting room

1.0

0.5 1.0

1.0

3

1.5

0.51

3

Nursery Activity Room

School classrooms

Library, Reading Room

student dormitory

Library Reporting Hall

Library Library

Underground parking garage

1.5
3
1
2.5
2
13
56


CONTACT US

Contact: manager.zhan

Phone: 15928853231

Tel: 028-87849573

Email: 2541565040@qq.com

Add: Chengdu Gaoxin West District Science and Technology Park

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