Mikroklima mastali pre dojnice s prirodzenym vetranim v letnom obdobi.
1995
Sottnik J. | Flak P.
Parameters of microclimate and functions of natural aeration are analysed in production halls with prefabricated and walled peripheral walls and insulated roof for 200 dairy cows with loose housing in boxes with litter. The originally projected dimensions of the roof ventilation slot without efficiency regulation appeared to be oversized in winter, the buildings became overcooled and slots were partially covered in the stable 1. The main task was to find out whether the reduction suitable for winter period will be convenient also for summer. Supplementary equipment, doors into runs were used for natural aeration in the summer temperature extreme. Air temperature in the buildings was lower than outside, they kept up with daily periodicity of outer temperatures in course of time. Relative air humidity was shifted in time compared with outer values. The air flow and cooling values were 0.68 m s** (-1) and 345 W m** (-2), respectively, in building 1; these values were lower in building 2, on average 0.38 m s** (-1) and 204 W.m** (-2), respectively. Content of carbon dioxide, the direct indicator of air exchange was within the norm in both systems. The resulting average concentration was 0.127 % in the building 1 with 40 cubic m per cow used space, and only 0.049 % in the building 2 with 50 cubic m per 1 dairy cow used space. It is possible to reduce the functional section of the ventilating slot in the building 1 by 40-45 % (to approx. 0.12 square m per one dairy cow), and in the building 2 by 30-33 % (to approx. 0.11 square m per one dairy cow).
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