An improvement in health is expected as regards to lung problems and autumn abortions. Higher fertilization rates of sows in warmer periods due to the possibility of cooling the incoming air.
At the moment we are using an amount of air that later is cooled down by water. In the future it probably will be wiser and cheaper to ventilate with less air that has been cooled. If the pig farmer produces energy by the using solar collectors, he will be producing the most energy when the pig barns are the hottest – specifically on warm and sunny days. When the most energy is needed, the most energy will be produced.
The climate of the pig quarters will be independent of the weather conditions. Because you have made a variable in the production process stable, specifically the climate, the pig farmer can structurally optimise the production process. Also the company’s reliability will increase. How much we really can reduce the amount of ventilated air only the future can tell.
Ventilated air is waste. The mixture contains odorous substances (e.g. ammonia and pit fumes), dust, CO2, heat and water. The system provides a possibility to reduce the waste production and to increase the separation of waste. Ammonia and pit fumes: as there is no airflow formation in the quarters, the air in the pit is nearly still. The possibility arises to install shunts from the pit to the central extraction canal. This way in a small amount of air with a high concentration of pit fumes and ammonia ,these gasses are transported away (waste separation).
During the trial it became clear that there was a lot less dust deposition in the animal quarters. Dust has been dissipated more efficiently.
As there exists a possibility to grow some plants above the air intake channel (a similar system is used in greenhouses), CO2 can be transformed to oxygen. This would mean a reduction of CO2 output. Furthermore, less O2 needs to be provided. It is essential though to use illuminating roofing materials (skylights). Plants need manure and can generate extra income (waste reduction).
Heat production will remain, but the heat will be dissipated in a more efficient manner. As the air in the intake channel is cooler than the air in the animal quarters (especially during colder periods), there will be condensation forming at the bottom of the air inlet. This condensation is transported away via a gutter, hanging below the air inlet. This water does not need to be ventilated and can be collected and used (waste separation).
The question is whether or not there will be less or more energy use with this system. Energy reduction will occur due to more efficient use of ventilation (in fact 100% of the air that enters is distributed) and making use of the rising air propelled by the body heat of the pigs. At the moment farmers use a ceiling ventilation system that works against this natural energy force.