Скачать презентацию Working environment 1 Influence of microclimate on the Скачать презентацию Working environment 1 Influence of microclimate on the

Lecture_6_Working_environment.pptx

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Working environment 1) Influence of microclimate on the body and their rationing; 2) protection Working environment 1) Influence of microclimate on the body and their rationing; 2) protection from harmful substances in working area; 3) ventilation systems and their application.

Forming of heat At rest • 4 – 6 kj/min At heavy • 33 Forming of heat At rest • 4 – 6 kj/min At heavy • 33 - 42 kj/min work

Heat transfer Normal microclimate condition (20 °C) 20 – 25% Evaporation 45% Radiation Heat Heat transfer Normal microclimate condition (20 °C) 20 – 25% Evaporation 45% Radiation Heat transfer 25 – 30 %

Indicators at deviation of microclimate At evaporation of 1 g water In normal condition Indicators at deviation of microclimate At evaporation of 1 g water In normal condition in day by sweat • 2. 5 kjoule • 0. 6 gramm of liquid At temperature • 10 -12 30 °C liters

Indicators of normal microclimate Relative hamidity Movement of air • 40 – 60% • Indicators of normal microclimate Relative hamidity Movement of air • 40 – 60% • 0. 1– 0. 3 m/sec

Classes of danger substances First class Second class Ext. dangerous ≤ 0. 1 mg/m³ Classes of danger substances First class Second class Ext. dangerous ≤ 0. 1 mg/m³ High degree From 0. 1 to 1 mg/ m³ Third class Forth class Low dangerous Few dangerous From 1 to 10 mg/m³ More 10 mg/m³

MPC of some substances Code 0330 Sulfur dioxide 3 0. 5 0333 Hydrogen sulfide MPC of some substances Code 0330 Sulfur dioxide 3 0. 5 0333 Hydrogen sulfide 2 0. 008 - 0334 Carbon bisulphate 2 0. 03 0. 003 0301 Nitrogen dioxide 2 0. 085 0. 04 0328 Carbon black 3 0. 15 0. 05 Contaminant substances Class of danger MPC, mg/m 3 Max of Averag one-off e daily 0. 05

Measures on redusing of harmful substances Changing of harmful substances by less Harmful substances Measures on redusing of harmful substances Changing of harmful substances by less Harmful substances Rationalization of tech – nological processes Mechanisation and automatisation Decreacing of harmful substances System of ventilation Moisturaturization of equipment Personal protection means

Ventilation Aeration ventilation Mechanical ventilation Organised Air intake Unorganised Exhaust Ventilation Aeration ventilation Mechanical ventilation Organised Air intake Unorganised Exhaust

Mechanical ventilation Mechanical ventilation