... First-class feed quality - a key building block in your success!
... Increase your effectiveness during the hay harvest
... Good hay even in changeable weather
... How a hay ventilation system from Auer increases your yields
...Auer provides you with professional assistance
Our expertise is underlined by our many years of experience of intensive, in-house development work in close cooperation with people in the field and satisfied customers
Information on cold and hot-air ventilation
Cold-air ventilation
The intake humidity of the feed for cold-air ventilation should be between 30% and maximum 40%.
For hot-air ventilation, feed with a humidity up to 50% can be taken in.
If material taken in for cold-air ventilation is drier than this, it is only possible to reduce re-humidification in the field overnight from dew or fog by swathing, which increases the labour involved while also reducing the hay quality. Success is primarily a function of temperature and the humidity of the outside air.
In extended periods of bad weather, there is a risk of the feed spoiling.
Leafy grasses such as clover, alfalfa and juicy herbs dry less well. Aftermath generally dries very well.
Hot-air ventilation
Solar heating: The heated air is extracted from the roof or from roof spaces. In practice average temperature increases of 5°C - in exceptional cases up to 10°C - are achieved. This ensures the low air humidity of 40-60%, which is absolutely vital for the final drying phase.
Air heating with a heater: This mainly relies on oil or gas-fired fan heaters or wood chip heaters with heat exchangers. To ensure rapid drying, the increase in temperature should be at least 15°C.
Performance of the system | Heating output (net) in kW to heat the air by |
m³/h | 1°C (1K) |
20.000 | 7,00 |
25.000 | 8,75 |
30.000 | 10,50 |
35.000 | 12,25 |
40.000 | 14,00 |
45.000 | 15,75 |
50.000 | 17,50 |
This table can be used to estimate the required heating output, if you are thinking of getting a warm ventilation system. An average wood chip heater with a heating output of 40 - 60 kW can cause a temperature increase of approx. 3.8°C - 5.7°C, when used with a fan with an air output of 30,000 m³/h.
... Some honest advice for achieving optimum results for round bale drying
Air preheating (= hot-air ventilation) is necessary
... We have no interest in telling tall tales - we only want you to achieve the objective of first-class feed quality!
More and more farmers are opting to purchase hay drying systems, because hay ventilation technology keeps labour, risks from weather, leaf loss, and loss of aroma and nutrients to a minimum. Studies and day-to-day experience show that quality hay can not only increase milk production, but also protein levels in the milk and the health of the animals.
Auer is a specialist in the area of hay drying. With Auer as a partner, customers can rely on many years of experience, intelligent high-performance fans, and the best possible advice; the wide variety of intelligent, high-performance fans from 4 kW to 22 kW, with the capacity to handle air volumes well in excess of 100,000m³ make it clear that hay drying requires a great deal of experience to produce quality hay while keeping operating costs low. Auer guarantees to use an appropriately dimensioned system for every requirement, be it haystack ventilation, box drying, or round bale ventilation.
For information, contact:
Auer Landmaschinenbau GmbH
Tel. ++43 (0)7215 22 74 0
auer@auerlmb.at