Massive benefit for semen production
This is particularly interesting for Boar semen production, where the air volumes we need to manage are smaller, but the returns in terms of quality semen production and benefits for improved farrowing are massive. Hopefully explaining how we calculate the requirements to achieve ‘optimal air’ will clarify why doing it this way is so important. The real culprit at the end of the day is air energy, frequently ignored when wet cooling is used.
So how do we calculate the amount of cooling required for a group of pigs? Well first, you will require some basic information about the climate you expect to manage. For instance, the amount of air required for the animals concerned. You will also need to have a good idea about the quality of the air that the system will have to deal with. A climate that produces air with high energy or enthalpy will require more cooling than one where the air energy content is lower.
How much air?
One of the first things to think about is how much air you will need to condition. Most closed house systems will have already worked this out when designing the climate system. This is typically the amount of air required per pig at peak time, multiplied by the number of pigs.
By way of example – 50 boars in Myanmar
- ventilation rate with cooling of the incoming air: 200 m3/hour/boar
- Total max. ventilation: 50 x 200 = 10,000 m3/hour