Health hazards

The fan user must consider the effects of the gas and its solid content, on the health of the operators and employees. Most countries have legislation limiting the exposure of employees to substances judged to be hazardous. If the gas to be handled is

Dry-bulb temperature / eC

Ic’Miaan

Ar, i:M>i>;

■mum. iiiaiisni ainiif 4ii IIIIIFilll

Mi’ll-:.

■■"..nan

Ht’.auiin

•.iliilin

Iiiamair

Aaaaaaaan

Aiiitiir. ii

IliRir»:.

R.;«nnairai

Aaaiaitanai

■■«■iraaiii

Aiiii’iiiiu

IIII’.IIBO;.

?H’*;«aiiar

:«<aaiiaair«

Aaaaiоt-вaia

Liiiira^ii

Aana. ia»-.

Aii»rj;iaaiik’

Aaaaaauiiaa

Eai«;,<aaiia

IaaaiiiiBiiar

IiraaifniM

Ipaiiinii’.ai

’••■ii^aaaiiiF<iiaai"iaaaaiiMB*S

Jiiii^iia’^tiiaiiitraiiiiirtfaiaaa’.aiaiia’a!’"’!

II ililllill

[ООПSЬПf^ ******* <*п***afjiai,%r4aiiiai! iaaaiifii

Iaiiiii»4iiiiiivi|i||||r4′,IRaii|||Bi|ri|ni|..aa

«•i>i^aiiaii»iiic’.’iauiiп^ьia!!>S! SS2!S is;; j ■ * *■

Ii<a«iirkiiaaai’.iia*:.riaaiiar<iaaia’aiii<iiiiii

Ij’;.’aiiimi

Lll’iillllfllir

Ii. aiiittmii

LiiitiliiliNi

(iiiuiliir«’;

IiiiSii. iinii

■aaaaniiaaaaa

Lllfiillllllll

Laajaaatia*:;..

LiaMЬilllii

Fii>’*:.iaiui

Iiinaiiaii. i

Iiiaiuiiii. il

Maaaaiirjaaa

Laaaaiaiuaaaa

IiiiuaM«!!;)!

(i.5>|.pt)/ rtdjemue sypeds

 

Health hazards
Health hazards
подпись: dry-bulb temperature / ec

_C

U

U

Eu

U

To

Q_

 

M

Ыы

U

 

Health hazards Health hazards Health hazards Health hazards Health hazards

Figure 2.2 Psychrometric chart

Courtesy of CIBSE (Chartered Institution of Building Services Engineers) — Reproduced from CIBSE Guide C: Reference data

Listed in local regulations the fan manufacturer must be in­formed. The type of health hazard must be specified.

Another health hazard, sometimes not recognised as such, is noise. Some countries have regulations stipulating the accept­able noise levels and exposure times. It must be remembered that the fan duty will largely determine the fan noise. High pres­sure fans will be noisier than low pressure fans. System resis­tance should therefore be kept as low as possible.

Some fan types are inherently noisy. Large equipment, in gen­eral, is noisy. Noise levels can be attenuated by fitting acoustic enclosures. However, these tend to drastically diminish the maintainability of the equipment by hindering access. In some instances, costly acoustic enclosures have been removed at site and scrapped in order to achieve acceptable access. One easy solution to this hazard is to declare certain areas “Ear Protection Zones”.

Posted in Fans Ventilation A Practical Guide


Добавить комментарий

Ваш e-mail не будет опубликован. Обязательные поля помечены *