CIGR Working Group No 13
Climatization and Environmental Control in Animal Housing

1st Report:

Aerial Environment in Animal Housing

Climatization of Animal Houses

Summary

The First Report was to provide facts to calculate barn climate (temperature, humidity and CO2) under different conditions such as type of animal, production level, insulation of the structure and outside climate.

The Working Group presented its First Report at the 10th CIGR Congress in Budapest, Hungary, 1984. The report was published by and can be ordered from
The Centre for Rural Building
Scottish Agricultural College
Craibstone, Bucksburn
Aberdeen, AB2 9TR Scotland.

Content of the first report

The First Report on Climatization of Animal Houses consists of following chapters:

Fundamentals
Comparisons of expressions for total anomal heat prouctions used in different countries. Equations for lower critical temperature for cattle and pigs and CO2 production.

Practical values
CIGR-equations for total heat animal production for cattle, sheep and goats, swine, horses, poultry (layers and broilers) and rabbits. Euqtion for the proportion between sensible and latent heat (non sensible) dissipation inside a livestock building at function of inside temperature.

CIGR recommendations for maximum concetrations of noxious gases in animal houses Recommendations are given for NH3, CO2, H2S and CO.

Outside temperature and relative humidity. Climatology statistics with porbabilities for low and high temperatures from following European countries are presented; A, B, CH, D, DK, F, I, N, NL, S, UK.

Heat losses through the structure. Values for inside and outside surface resistance for different building parts in idfferent countries. Method of calculating heat loss through the florr. General expression for heat losses through the structure.

Ventilation caluclation methods. Physical properties of air and CO2 Formjulas to determine air flow based on enthalpy-, heat-, CO2- and moisture balance respectively. Examples from pig and broiler houses.

Adaptation of the CIGR recommendations into national standard or recommendations and updating of basic equations.

In the working group the representative for a certain country has no official authority to approve or disapprove the proposed standard. The utilisation of the CIGR- Standard is a matter for the responsible board or authrity in each country. In many countries (Austria, Denmark, Sweden, Norway) an in the DIN-Norm (Germany) the CIGR standard has been adopted to a very large extent. The report has also been translated into French.

The updating of equitions and data in the First Report will be done, it is hoped, in a special revised version of the First Report.