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The aim of this study was to investigate the changes of lying time and other behaviour manifestations of dairy cows during usage of different cooling systems of animals. Alternative hypothesis was presumption, that the lying time of cows in lying cubicles with applied two different cooling systems are indifferent. The sprinkling system was used to animal cooling in group S in summer time. In group SV was disposable sprinkling system and diagonally rotated ventilators. Activities and the rest of animals were evaluated in 10 minute intervals using a camera system for 24 hours. Data obtained was tested by nonparametric Kruskal-Wallis one-way ANOVA and multiple comparison test for detecting of significant differences in the behaviors between groups of cows. There was found positive effect of animal enhanced cooling using sprinkling system with increased air movement by ventilators. It reflected in significant prolongation of whole lying time and shortening of time, when animals were standing. It resulted from final values of investigated behaviour manifestations of dairy cattle within 24 hour period that animals in group SV with sprinklers and ventilators lay in stalls longer than in group S with sprinklers, but without ventilators (10.76 h*d -1

A paper dealing with prevailing floor construction types from a thermo-technical point of view. The accent was put on lying cubicles for cows, the floors must be soft, dry, warm and flexible. Attention was paid to analysis of the thermal resistance and thermal absorptive capacity of selected types of flooring. The greatest thermal comfort depends upon the design of floor structured coating materials. A biological floor accretion layer has a positive thermal influence and softens thermal comfort during the animals lying period. A calculation, estimating values of thermal absorptive capacity, shows that the quality and thickness of the structured layer on a covered floor is very important, underlying layers are only affected with thinner designs of a calculated boundary value. There were three concrete cubicles with excrements completely removed and carefully cleaned. The second part of the barn was created of concrete elevated cubicles covered with 65 mm earthenware tiled floor and straw bedding 1 kg/cow/day on the one barn side and with concrete cubicles with straw bedding on the other side of the barn. This observation was carried out with a group of 18 dairy cattle, too.The sixth type of the flooring was tested in Zuberec farm. There were the similar concrete cubicles with mattresses as in Nitra, but the filling material was crushed rubber-foam.Thermal measuring was applied using a thermovision camera AGA 570 DEMO and a non-contact thermometer RAYTEK ST 60. For winter observation, we used a non-contact thermometer to measure the surface temperatures (internal air temperatures were +5°C). An experiment was carried out using a circular method handled according to analysis of an accurate thermovision trial from previous experiments . We selected the most repeated characteristics of the thermal area from drawing camera shooting mostly situated in the back of the recorded thermal shadow-frame. For comparability we carried out all experiments at the same interior temperature, +5°C. The same was done with the specific circle aid, made as one internal file together with 16 lying parts situated between two concentric circles (∆ r = 70 mm). The lying time was noted directly after dairy departure from the cubicle and this template was grounded to the rear part of the leaving warm shadow. Then a temperature resulted, measured in all 17 parts. The average temperature values were evaluated on various lying longitudes from 20 to 60 minutes.The floor surface temperature may be considered as resultant reaction on structure cubicle floor material defined by the thermal resistance and the thermal absorptive capacity values of equivalent single and double-layer structure technique. The calculating methods corresponded to STN 73 0540-4, part 4: Calculating technique. The calculating of an equivalent three-layer structured technique occurs only sporadically with lying cubicle structures. Thermal insulation lying on lower structured layers -under concrete or ceramic -does not affect the improvement of the thermal comfort o...

Pogran Š., Reichstadterová T., Lendelová J., Páleš D., Bieda W., Bošanský M., 2013. Verifi cation of agroproduction building structures aff ecting the quality of indoor environment in the summer season. Res. Agr. Eng., 59 (Special Issue): S54-S59.Th is contribution focuses on the evaluation of the eff ect of aerated concrete external wall of a hall falling within the category of special-purpose agricultural buildings in terms of the phase shift of temperature oscillation. Th e assessment was performed by precise and approximate calculation procedures and was then compared with the results obtained from the values actually measured under the operating conditions. Th e building energy balance is aff ected by diff erent thermo-physical phenomena generated by the interaction between solar radiation and diff erent parts of the building envelope. Th ese components should be closely linked with a unifi ed aim to provide an improvement on the energy balance of the building (Fuliotto et al. 2010). Internal air temperature is infl uenced by variations in outdoor conditions such as temperature, solar radiation or meteorological situation. Other important parameters are wall overall heat transfer coeffi cient, internal heat gains or losses caused by devices such as lighting, occupancy, etc. Many articles related to this topic are focused on energy storage using heat accumulation in purpose-designed structures (Khudhair, Farid 2004;Heim 2010). At the present time, the phase shift of temperature oscillation is a lack in understanding thermal characteristic of buildings, which can present the semblance of a considerable infl uence on the thermal comfort of interior users during the summer period. Th e surface of the building envelope is heated by exposure to the increased external air temperature or direct sunlight, and at the same time the increased temperature from the surface is gradually spread towards the interior. Heat conduction occurs due to the exchange of energy Vol. 59, 2013 (Special Issue): S54-S59 Res. Agr. Eng.