presentation finland
DESCRIPTION
Peter van der Voorstin esitys Huittisissa 15.2.2012TRANSCRIPT
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Climate control in Finnish Pig farms
v.d. Voorst Klimaatbeheersing ing. Peter van der Voorst
15-02-2012
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A pig can live without:
Feed: for 3 weeksWater: for 3 daysAir: for 3 minutes
Therefore a good climate is very important
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Ventilation in pig houses
Ventilation in a pig house is based on five important principals: The 5 A’s
-Air-inlet outside-Air-inlet inside-Air-movement-Air-quality-Air-outlet
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Too coldRoom temperature below set temperature
Too much ventilationHeating system doesn’t work wellInsulation too lessWrong place of the temperature sensorMeasuring fan doesn’t work wellAir-inlet too big (wind influence)Wrong air movementWrong installed climate curve
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Too warmRoom temperature depends on outside temperature
Too less ventilationHeating system doesn’t work wellNo insulated roofWrong place of the temperature sensorAir-inlet too smallWrong air movementWrong installed climate curve
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Draught
Too much ventilationWrong air movementAir leaksWrong installed ventilation system
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Air quality
Too less ventilationVery dirty pensAir movement in the slurry pit
Humidity: 60 – 80%Ammonia: < 20 ppmCarbon dioxide: 2000 – 3000 ppm
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Climate control
What can be controlled?Air- inlet from outsideAir- inlet system inside Temperature sensorNH3CO2Measuring fan Rotations per minute of the ventilatorThe air movement of the incoming fresh air.Air leaks and bad insulation with infrared camera
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Windinfluence is very bad
The air-inlet must be calculated with 1,5 cm²/m3 maximum ventilation.
We need this max. opening for about 2 weeks a year (high temperature + max. weight pigs)
Very important: The air-inlet must be automatically regulated!!
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The inlet valve system:
Problems with the inlet valves:The openings of the inlet valves within one
room are not the same.Installation settings are quite difficult.
Many mistakes are made.Motors get broken.Cables get broken.Wrong place in the room.
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Recommendations for existing farms:
Beware of good installation settings.Beware of that all the inlets within one
room has the same opening.For example 10% opening must be the
same for all the same rooms.Extra air inlet above the corridor
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The best inlet system for Finnish circumstances
Animal group
System 1 System 2
Nursery Diffuse ceiling
Farrowing Combi diffuse ceiling
Ground channel
Gestation/ insemination
Combi diffuse ceiling
Inlet valves
Fatteners/ rearing gilts
Combi diffuse ceiling
Inlet valves
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Diffuse Air-inlet system
Diffuse ceiling on 2.80 m. ± 1/3 of the ceiling must be closed and
insulated. Opening in ceiling panels: 0,8 cm²/m3 Two layers of 6 cm. special glass wool. Install strips of plastic bubble foil (20 cm.)
between the perforated plates and beams to prevent air leaks and “cold bridges”. Solid floor in the corridor.
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Combi-diffuse Air-inletsystem
Above the corridor an opening of 2 cm. made of a hollow pvc-panel.
20 cm above the insulation and 40 cm below the ceiling.
Pvc panel exactly in the middle of the corridor.
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Groundchannel-ventilation
- Air comes from an air-channel under the walkway through a slatted floor.
- The temperature cools down in summer (3-4 °C) - The temperature warms up in winter - 25 % less ventilation
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Climate computer
SettingsTemperature set pointHeating set pointMinimum ventilationMaximum ventilationBandwidthClimate curve
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Avoid mistakes in climate controlChoose the inlet system depending on the
animals.After that make the drawings and
calculations depending on that inlet system.Ask for 2 or 3 offers and choose not the
cheapest but the best company to make the ventilation system.Install the right settings. Very important are
the settings for 100% ventilation
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Laying behavior
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