Peter van der Voorstin esitys Huittisissa 15.2.2012

1. Climate control in
Finnish Pig farms
v.d. Voorst Klimaatbeheersing
ing. Peter van der Voorst
15-02-2012

2. A pig can live without:
 Feed: for 3 weeks
 Water: for 3 days
 Air: for 3 minutes
Therefore a good climate is very
important

3. 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

5. Too cold
Room temperature below set temperature
 Too much ventilation
 Heating system doesn’t work well
 Insulation too less
 Wrong place of the temperature sensor
 Measuring fan doesn’t work well
 Air-inlet too big (wind influence)
 Wrong air movement
 Wrong installed climate curve

7. Too warm
Room temperature depends on outside
temperature
 Too less ventilation
 Heating system doesn’t work well
 No insulated roof
 Wrong place of the temperature sensor
 Air-inlet too small
 Wrong air movement
 Wrong installed climate curve

10. Draught
 Too much ventilation
 Wrong air movement
 Air leaks
 Wrong installed ventilation system

11. Air quality
 Too less ventilation
 Very dirty pens
 Air movement in the slurry pit
 Humidity: 60 – 80%
 Ammonia: < 20 ppm
 Carbon dioxide: 2000 – 3000 ppm

12. Climate control
What can be controlled?
 Air- inlet from outside
 Air- inlet system inside
 Temperature sensor
 NH3
 CO2
 Measuring fan
 Rotations per minute of the ventilator
 The air movement of the incoming fresh air.
 Air leaks and bad insulation with infrared
camera

21. 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!!

25. 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.

32. 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

34. The best inlet system for
Finnish circumstances
Animal System 1 System 2
group
Nursery Diffuse ceiling
Farrowing Combi diffuse Ground
ceiling channel
Gestation/ Combi diffuse Inlet valves
insemination ceiling
Fatteners/ Combi diffuse Inlet valves
rearing gilts ceiling

35. 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.

41. 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.

48. 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

52. Climate computer
Settings
 Temperature set point
 Heating set point
 Minimum ventilation
 Maximum ventilation
 Bandwidth
 Climate curve

53. Avoid mistakes in climate control
 Choose 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

54. Laying behavior

57. Thank you for your
attention
Peter v.d. Voorst
peter@vdvoorst.nl
www.voorstklimaatbeheersing.nl