dr. naeem tahir

ByDr. Naeem TahirArea Sales Manager Jadeed Farms (Pvt) ltd.Faisalabad.

Fan / Pad Selection Criteria And Their Impact On Working Of House

Poultry Housing

Early Poultry Production • Prior to the second world war most

chickens were produced in open yards or dirt floor sheds.

• With the breeds and feeds available: back yard producers could produce a 3.5 lb bird in about 16 weeks.

• Poultry markets were local as the birds had to be transported live and process close to the end user.

Early Poultry Production

Early production systems were not specialized, flocks produced meat and eggs which the producer could utilize or sell. Many rural and even urban families raised chickens to supplement their income. Note the dirt floor, litter and waste were removed by hand. While most of these early chicken houses were naturally ventilated.

Poultry 1940 - 1960• Advances in breeding/genetics and feeds

and nutrition improved feed conversion and cut production time for a 3.5 lb bird from 16 to 5 weeks.

• Advances in refrigeration expanded distribution of processed birds and eggs and enlarged the market.

• The dynamic of the poultry market and the industry had changed.

Poultry 1940 - 1960• The scale of

production increased

• Large flocks in houses or open yards became the norm

• The price of chicken dropped

• Demand for poultry products grew in response

Modern Poultry Production • Today large scale chicken production is

done in total confinement facilities. – Weather – Predators/parasites – Pathogens – Automation – Intensive production schedules – Control of waste runoff

Modern Poultry Production

Poultry Production • Modern poultry operators tend to specialize in one type

of production. • Poultry housing must be geared toward each individual

operation. • Houses for various production enterprises may differ

greatly in size, appearance, and arrangement of facilities.

• However, they also have some similar requirements. – A good location, with a good water source and a well-insulated

building, equipped with a proper ventilation, heating, lighting, feeding and watering system are important in all types of poultry housing.

Separation by Age Class & Product

• Poultry producers are separating birds by species age class and product. – Brooding – chicks & poults – Breeding – hens & roosters/toms – Laying – egg production– Broilers – meat production

• Age segregation: – Customize environment to optimize productivity – Prevent the spread of pathogens

• Younger birds more susceptible than older birds.

Brooding • early period of growth

when supplemental heat or cold must be provided, due to the birds’ inability to generate enough body heat.

• Start at 95° F and reduced by 5° each week.

Brooding

• Brooding rings are used to keep chicks and poults near food, water and heat, critical for their survival

Broiler/Grow-out Facilities

• Broilers need consistent temperatures and constant access to food and water to grow efficiently.

Integrator poultry systems• Typically a farmer in an integrated system

will receive hatched chicks from the integrator.

• The chicks are raised in a brooding facility until they are large enough to be moved into broiler grow-out housing

• The broilers are fed until they reach market weight and are shipped out live for processing.

Broiler & Breeding Environments

• Integrated company programs vary but consistent temperatures of 70 - 72° F produce the best performance in mature birds.

• Maintaining temperature consistency and uniformity throughout the house is as important as the temperature itself.

Warm Weather Ventilation

• The 72° F optimum temperature is the effective temperature the bird feels.

• in warm weather ventilation alone will not reduce the temperature enough.

• The wind chill effect of tunnel ventilation and evaporative cooling pads help to lower the effective temperature.

Tunnel Ventilation

Ventilation

Cooling pads

Cooling Pad System

Fan System

Blade Freq. Amp 400 V HP RPM Noise (db). Air Flow m3/hr

50″ Box Fan

1220 50hz 2.1 1.5 1440 less than/equal to 62

44250

50″ Cone Fan

1270 50hz 2.8 1.5 1440 less than/equal to 64

51020

Box Fan vs Cone Fan

Box Fan

Outside Frame Galvanised Sheet

Fan Ducting Fibre Glass / Galvanised

Blade Material Aluminium / Stainless Steel

Hub Aluminium with gun metal busing

Motor IP 55, 230/440V 50hz

Shutter Galvanised Sheet

Structure of Fan

Cone Fan

Hanging – Axial Fan

Size 36″ dia – 3 blade

Motor H.P 1/2 hp, Direct Drive

R.P.M. 960 RPM, 230 V AC. 50hz

Throw 60ft.minimum.

Body & Grill Galvanised

Blade Powder Coated, Aluminum Blade

Hanging – Axial Fan for Air Circulation

Selection of Fan and Pad

Selection of fan and pad depends on the area requirements like

Area vise temperature and humidity

Air velocity

Shed cross section area

Capacity of the shed in term of bird population

To obtain desired air exchange rate exhaust fan capacity must be determined at a minimum static pressure of 0.10” (25 Pa).

Energy efficient `Desired energy efficiency rating ` Should have an energy efficiency of at least 20 cfm/watt @0.10”

Not only we want a fan that is energy efficient, we want a powerful fan as well.

A fan with a high air flow ratio is less affected by the wind.

Selection of evaporative cooling pads should involve consideration of product effectiveness useful lifemaintenance requirements dealer support and service

in addition to initial cost. The least expensive pad materials may not be very cost-effective, since they are generally less effective at cooling. The evaporative cooling efficiency is a good indicator of pad performance.

Pad selection, sizing and placement

Sizing of pad systems is based on preventing excessively high air velocities through the pad.

High velocities can cause high static pressure drops and blow water off the pads both of which reduce system effectiveness.

ventilation system design

Air inlets

To avoid dead-air space near the end

wall.

Flute angle of the pads

Placement of Pads Depends

PADS CHARACTERISTICS

CELdek® 7090-15: Flute angles: 30° and

60°

Pad thickness: 10cm

Flute height: 7mm

Nr of sheets in 60cm:

85

4040

Flute angles: 40° and

40°

Pad thickness: 10cm

Flute height: 7,3mm

Nr of sheets in 60cm:

82

Gigola & Riccardi 70-90

Distance between flutes

2.5 cm

2 cm

Gigola

CELdek

VISUAL TEST

Gigola Star Cool 70-90: Some corrugated sheets

are shorter than the others

The surface is not plane

CELdek 7090 and 7060:The corrugated sheets

have the same lengthThe surface is plane

Performance table for CELdek 7090Pad thickness: 100mm / Air speed: 1.5m/s / Altitude: 0m above sea level

Thank you