Carlos Augusto de Paiva Sampaio

Avaliação do ambiente térmico em instalação para crescimento e terminação de suínos utilizando os índices de conforto térmico nas condições tropicais

The objective of this study was to evaluate the thermal environment in growing and finishing swine housing and by using the temperature and humidity index (THI) and black globe temperature and humidity index (BGHI), under tropical conditions. The dry bulb temperature, relative humidity, wind velocity, THI, BGHI and the radiant thermal load index (RTL) were measured inside and outside the housing. The mean of BGHI inside the housing during summer and winter station had values between 68.9 to 74.8 and 55.3 to 61.2 and the results showed that during the hottest periods of the day the housing provided lower BGHI (P<0.05). The THI was not accurate for determining thermal comfort under tropical conditions. The RTL was reduced up to 35% inside the housing due to the shade effect.

Avaliação do nível de ruído em instalações para suínos

This research was carried out with in growing and finishing facilities of swine housing with the objective to evaluate and compare the noise level emitted by the animals mainly during feeding and noise level from other sources, and estimate the occupational risk exposition of workers. The evaluation was made using noise level equipment and measurement as indicated in NR-15 norm located at 1.50 m of height, corresponding to the mean height of the workers ear. Four swine housings were evaluated. The statistical analysis was done using fatorial design and mean test. The results indicated significant differences at 1% probability level among the four housings. The mean noise level was 65 dB(A) and 70 dB(A) for growing and finished housing respectively, within the limits allowed in the NR15 norm (85 dB(A)) for a daily working of 8 h. Considering the peak noise level observed during feeding and other task schedule mainly finishing swine housing ear protection is recommended. There was also a tendency for the noise level to increase as thermal conditions became more unconfortable.

Temperaturas superficiais de telhas e sua relação com o ambiente térmico

The objective of this study was the analysis of temperatures of clay tiles, galvanized steel tiles and fiber-cement tiles with white painting on the roof and his relation with the thermal environment, in winter and summer conditions. The experiment was carried out in models of constructions quantifying the internal and extern temperatures from the tiles (TS), Temperature and humidity index (THI), Black Globe and Humidity (BGHI) and Thermal Load of Radiation (TLR) were employed for the characterization of the thermal environmental. The measured were performed inside and outside the housing. The results showed that the ceramic tiles and the fiber-cement tiles presented similar thermal behaviors and the choice of fiber-cement tiles of 5 mm with white painting on the roof is economically advantageous. The metal tiles were the ones that most heated up surpassing 53oC in his surface and the worst regarding to the thermal comfort compared with the other tiles. The THI was not accurate for determining thermal comfort under tropical conditions. There was significant reduction of RTL by the tiles to the not shaded area.

Avaliação de poluentes aéreos em instalações de creche e terminação de suínos

This research was developed in two swine housings in the phases of nursery and finishing: in two pens each, in two farms located at Salto County, SP, with the objective to evaluate ammonia and concentrations, and fungi presence besides estimating the occupational risk of exposure to these environmental agents. The evaluations were done according to recommended by the norms NR-15, NIOSH e ACGIH. Results indicated significant difference in ammonia concentration in relation to the hour, the housing and to the day period. They also indicate negligence to sanitary ventilation matter in nursery housing with consequent higher level of ammonia; which are linked to the air circulation inside housing, the manure and curtain management, housing typology, and to local climate conditions; besides swine crowd and density. Total dust concentration was higher in nursery buildings (0.84-9.16mg.m-3) than in finishing (0.84-3.34mg m-3), while inhale dust was higher in the nursery, however lower than 3.67mg m-3, and within the labor welfare limits. There were found fungi from genus Aspergillus, Penicillium and Neurospora in suspension in the internal environmental of the studied housings.

Generation of intensity duration frequency curves and intensity temporal variability pattern of intense rainfall for Lages/SC

The objective of this work was to analyze the frequency distribution and intensity temporal variability of intense rainfall for Lages/SC from diary pluviograph data. Data on annual series of maximum rainfalls from rain gauges of the CAV-UDESC Weather Station in Lages/SC were used from 2000 to 2009. Gumbel statistic distribution was applied in order to obtain the rainfall height and intensity in the following return periods: 2, 5, 10, 15 and 20 years. Results showed intensity-duration-frequency curves (I-D-F) for those return periods, as well as I-D-F equations: i=2050.Tr0,20.(t+30)-0,89, where i was the intensity, Tr was the rainfall return periods and t was the rainfall duration. For the intensity of temporal variability pattern along of the rainfall duration time, the convective, or advanced pattern was the predominant, with larger precipitate rainfalls in the first half of the duration. The same pattern presented larger occurrences in the spring and summer stations.