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Measurements of Air Ventilation Rates in Naturally Ventilated Dairy Cattle Buildings
| Content Provider | Semantic Scholar |
|---|---|
| Author | Berg, Werner Fiedler, Merike Kiwan, Alaa Brunsch, Reiner |
| Copyright Year | 2010 |
| Abstract | Animal husbandry is a major source of methane as well as ammonia. The quantification of emissions from livestock buildings with natural ventilation is a particularly difficult task and it is associated with uncertainties which are largely unknown. The main issue is the determination of the ventilation rate. Therefore, air volume streams were determined simultaneously by two different methods and compared with each other. Five field studies each lasting approximately four weeks during three different seasons have been conducted to study the air volume streams from a naturally ventilated building for dairy cattle in Northern Germany. The air volume streams were determined on the basis of the carbon dioxide (CO2) balance method and by the decay of the radioactive tracer Krypton-85. During each field campaign continuous measurements of gas concentrations within and around the building and two to six tracer gas experiments were carried out. Both methods delivered high ventilation rates about 1,000,000 m³ h -1 as an overall average. These high air volume streams were driven by complete open sidewalls and openings at the gable walls of the investigated building. The CO2 balance method is a quasi-continuously estimation of the ventilation rate whereas the Krypton-85 tracer gas measurements are discontinuous. However, both methods showed large scatter for the single measurement periods and should be further developed. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.csbe-scgab.ca/docs/meetings/2010/CSBE100762.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
