Humidification 436e2h

Welcome PRESENTATION ON HUMIDIFICATION PLANT

Luwa Textile Air Engineering

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WHAT IS HUMIDITY ? Relative humidity is a term used to describe the amount of watervapor

in a mixture of air and water vapor.

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WHAT IS HUMIDIFICATION PLANT? Comfort cooling

- For application without dust pollution

Humidification

- Standard system for Textile Industry in India

- e.g for Process house

Conditions (for example): Outside temp:

42 ºC

Supply air temp: 26 ºC (at WBT 25 ºC)

Air Conditioning Humidification

- For special production processes, or for lower Room temperatures

Conditions:

Conditions:

Room temperature: depending on Outside WBT

Room temperature: Setpoint ± 1.0 ºC

Room humidity: rh

Setpoint ± 2.5

Room humidity: Setpoint ± 2.5 rh

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WHY IS IT NEEDED ?

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WHY IS IT NEEDED ? Rel. Humidity [%]

Absolute Humidity [g/kg]

Temperature [°C] 5

•Role of Temperature and Humidity is very vital to

achieve desired output from the spinning mills • •Effect of moisture on Cotton fibre properties -Dimensions, weight, tensile strength, elastic recovery, electrical resistance, rigidity etc.. • •If a dry textile material is placed in a room with a particular set of ambient conditions, it absorbs moisture and in course of time, attains equilibrium. • 6

• Strength of COTTON goes up when R.H.% goes up •· Strength of VISCOSE goes down when R.H.% goes up •· Elongation %ge goes up with increased R.H.% for most textile

fibres •· the tendency for generation of static electricity due to friction decreases as RH goes up •· At higher levels of RH , there is also a tendency of the fibres to stick together •Temparature alone does not have a great effect on the fibres. However the temperature dictates the amount of moisture the air will hold in suspension and , therefore, temperature and humidity must be considered together. • • 7

Important conditions in Textile Processes Influence of rel. humidity on breaking force of yarns Influence of the relative humidity on the breaking force of yarns

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Deviation of the force [%]

15 10 5 0 -5 -10 -15 -20 -25 -30 40

45 Cotton

50

55

Wool / Silk

60 Acetate

65 Viscose

70

75 Linen

80 Polyamide

85

90

RH%

Polyester

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Sources of dust and fiber fly Re-directing

Roving

Design of supply air Converting system  low induction diffs  uniform Importance of climatic conditions Ringspinning conditions in the textile production processes  sufficient air changes

Winding

Warping

Weaving and Knitting

Fill feeding

Design of return air system  uniform suction

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Important conditions in Textile Processes Influence of fiber fly missing humidity

Humidification

+

electro static

Pneumafil Suction

+

air change rates

+ fiber fly

+

+

+

imperfections

+ Ends down

Machinery maintenance Machinery handling

Deposits on the yarn

+ +

Fiber deposits on machineries

+

Traveling cleaner

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Products and Systems Example: Auto Control type Humidification plant

Typical outside condition

Required room conditions ± 2.5 % rh

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Products and Systems Example: Control system (2/3)

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AXIAL FLOW FAN

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AIR CONTROLING LUWARS

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V FILTERS

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ROTARY DRUM FILTER

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ELEMINATORS

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SPRAY NOZILES

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LINEAR DIFFS

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