EFFICACY OF DIFFERENT LEVELS OF ALUMINIUM CHLORIDE TREATMENT ON THREE TYPES OF LITTER MATERIALS WITH VARYING THICKNESS ON THE PERFORMANCE OF BROILER THROUGH FOUR SEASONS OF PAKISTAN

Ventilation Management in ECH Dr. Rashid Sohail

VentilationVentilation is

Moving FRESH AIR INTO a house and moving STALE AIR OUT of the house;

Sending UNWANTED heat, EXCESS moisture, ammonia, OUT of the house; and

AIR MIXING to get heat, moisture, ammonia INTO THE AIR that leaves the house.

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ObjectivesProvide a suitable environment to facilitates

Maximum livability

To take maximum growth rate

To take better feed conversion

WHAT IS STATIC PRESSUREDefinitionStatic pressure is the difference between the inside and outside atmospheric pressureUnits; expressed in units of inches of water colum (WC) and pascals1 w c = 250 pascalsWhen ext. fan runs, it creates negative pressure in the house.Inside and outside pressure difference (static pressure) rises and allows to move the air into the house

EXH.FAN VS STATIC PRESSURE

MANOMETER

MEASURING INSTRUMENT OFSTATICPRESSURE

WHY IT IS NECESSARYTo maintain the maximum level of freshness in a house.To remove stale air containing excess amount of waste gases(ammonia,co2,co)To maintain optimum level of Temperature and RH according to the need of bird.

COMPARISON (AIR PATTERN)

Insufficient staticpressure.Proper static pressureStatic pressure too high.

STATIC PRESSURE VS TEMP. DIFFERENCE

Air QualityRelative humidity (RH) 45-65%Dust less than 3.4 mg/m3Oxygen(O2) more than 19.6%Carbon Dioxide(CO2)less than 0.3%Carbon Monoxide(CO) less than 10 PPMAmmonia(NH3)less than 10 PPM

The bird!

Where is the most heat coming from?

BODY HEAT PRODUCTIONOF POULTRYA 2-kilogram (4.4 lbs.) bird with a daily weight gain of 65 grams (14.3 lbs/100) takes in about 500 kcal daily.Of this, 130 kcal are used for growth, the remaining 370 kcal must be excreted in one form or another.

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Methods of heat loss:

Ventilation goals:Proper temperature

Optimum humidity

Adequate fresh air

No noxious gases

Types of ventilationsNatural Ventilation

Forced Ventilation

Types of Forced VentilationMinimum ventilation

Transitional ventilation

Tunnel ventilation

Conti.Natural Ventilation: Only Minimum ventilation is available but no mechanical vent.Minimum Ventilation: Low air velocity but long air exchange during brooding and cold weather.Transition Ventilation: Low air velocity, better air exchange rate. Summer Ventilation: Temperature control, high air speed to reduce effective temperature.

VENTILATION PARAMETERS:

Tunnel fans capacity.Cooling pads.Minimum ventilation fans.Air inlets.Climate controller.Insulation.

Volume of air in a houseLength x Width x Average height Example: Length = 328 feetWidth = 46 feetAverage height = = = 10 feet

Volume = 328 x 46 x 10 = 150,880 feet3

Tunnel fan capacity:

Depends upon

House area

Bird target wt.

On the basis of cross sectional area of house and desired velocity:

Cross Section = W x H = 46 X 9Desired Velocity = 600 ft./min.

CONE FANS: 600 x 46 x 9/26000CFM =10 BOX FANS: 600 x 46 x 9/20000CFM =12

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On the basis of body wt.:Cone fans:25000 birds x1.9kg. x 4cfm/kg. body wt./ 26000(cfm) = 8Box fans:

25000 birds x1.9kg. x 4cfm/kg. body wt./ 20000(cfm) = 10

CONE FAN>>

26000 CFM