scholarly journals CONFORTO TÉRMICO E DESEMPENHO DE LEITÕES CRIADOS EM GAIOLAS ENRIQUECIDAS COM PISO DE RESÍDUOS DE EVA (ETILENO-ACETATO DE VINILA)

2019 ◽  
Vol 34 (2) ◽  
pp. 230-240 ◽  
Author(s):  
Silvia Noelly Ramos de Araújo ◽  
José Pinheiro Lopes Neto ◽  
José Wallace Barbosa do Nascimento ◽  
Fernanda Fernandes de Melo Lopes ◽  
Maria Luíza de Souza Rezende
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Productive Performance ◽  
Weaned Piglets ◽  
Alternative Material ◽  
Globe Temperature ◽  
And Performance ◽  
Comfort Indices ◽  
Black Globe Temperature

CONFORTO TÉRMICO E DESEMPENHO DE LEITÕES CRIADOS EM GAIOLAS ENRIQUECIDAS COM PISO DE RESÍDUOS DE EVA (ETILENO-ACETATO DE VINILA)   SILVIA NOELLY RAMOS DE ARAÚJO1, JOSÉ PINHEIRO LOPES NETO2, JOSÉ WALLACE BARBOSA DO NASCIMENTO3, FERNANDA FERNANDES DE MELO LOPES4, MARIA LUIZA DE SOUZA REZENDE5   Engenharia Agrícola, Universidade Federal de Campina Grande, Rua Aprígio Veloso, 882 – Universitário, 58429-900, Campina Grande, Paraíba, Brasil, [email protected]; [email protected]; [email protected]; [email protected]; [email protected].   RESUMO: Objetivou-se analisar o conforto térmico de leitões na fase de creche, mantidos em instalações com piso de placas de resíduos EVA, utilizadas para reduzir a transferência de calor dos animais para a superfície de contato, utilizando-se 24 leitões desmamados, com idade média de 23 + 2 dias, distribuídos em 8 baias, utilizando-se dois tipos de pisos: tratamento 1- Placas de EVA + piso plástico vazado e o tratamento 2- piso plástico vazado. O delineamento experimental foi inteiramente casualizado (DIC) e a comparação entre as médias através do teste de Tukey (P<0,05). A caracterização do ambiente térmico foi realizada por meio do registro da temperatura do ar, umidade relativa, temperatura de globo negro, luminosidade e velocidade do vento. Para a análise do conforto térmico proporcionado pelos pisos utilizou-se os índices de conforto térmico (temperatura de globo negro e umidade e a carga térmica de radiação), o mapeamento térmico superficial (pisos e leitões) e o desempenho produtivo dos animais. Os resultados indicaram que, as placas sobre o piso mostraram ser eficiente na redução da transferência de calor sensível entre o piso-leitão, o que tornou o aquecimento mais eficaz para os animais.   Palavras-chaves: conforto térmico, creche suína, material alternativo, piso plástico.   THERMAL COMFORT AND PERFORMANCE OF PIGLETS CREATED IN ENRICHED CAGES WITH EVA WASTE FLOOR (VINYL ETHYLENE ACETATE)   ABSTRACT: The aim of this study was to analyze the thermal comfort of piglets in nursery phase, maintained in systems with EVA waste plates floor, used to reduce the animal heat transfer to the contact surface, using 24 weaned piglets, average age 23 + 2 days, distributed in 8 bays, using two types of floors: treatment 1: EVA plates + leaked plastic floor and treatment 2: leaked plastic floor. The experimental design was completely randomized (CRD) and the means were compared using Tukey's test (P<0.05). The characterization of the thermal environment was performed by recording the air temperature, relative humidity, black globe temperature, luminosity and wind speed. Thermal comfort indices (black globe temperature and humidity and thermal radiation load), thermal thermal mapping (floors and piglets) and the productive performance of animals were used to analyze the thermal comfort provided by the floors. The results indicated that the boards on the floor were shown to be efficient in reducing the transfer of sensible heat between the floor-piglet, which made heating more effective for the animals.   Keywords: thermal comfort, nursery, alternative material, plastic floor.

scholarly journals Analyzing the Effect of Water Body on the Thermal Environment and Comfort at Indoor and Outdoor Spaces in Tropical University Campus

2021 ◽  
Vol 12 (10) ◽  
pp. 282-288
Author(s):  
Farhadur Reza ◽  
◽  
Shoichi Kojima ◽  
Wataru Ando
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Outdoor Thermal Comfort ◽  
University Campus ◽  
Clothing Insulation ◽  
Comfort Index ◽  
Outdoor Spaces ◽  
Globe Temperature ◽  
And Performance ◽  
University Spaces

Water bodies play a significant role in its surrounding thermal environment. Thermal comfort in university spaces is critical that affects the students’ health and performance as well as the staffs. This study investigated thermal environment and comfort near lakeside and non-lakeside tropical university spaces. Standard Effective Temperature (SET*) have been calculated using recorded air temperature, relative humidity, globe temperature, air velocity, clothing insulation and metabolic rate to evaluate the thermal comfort in outdoor and indoor spaces. The effects of weather parameters have been clearly visible on the comfort index. The calculated SET* values indicate that the outdoor thermal comfort near a lake is much closer to the standard comfort zone than non-lakeside outdoor space. In the case of indoor thermal comfort, however, slightly a different scenario has been observed. To achieve the desirable indoor thermal environment, some design considerations are recommended based on findings.

scholarly journals Thermal comfort indices in individual shelters for dairy calves with different types of roofs

2011 ◽  
Vol 31 (6) ◽  
pp. 1044-1051 ◽  
Author(s):  
Patrícia C. de F Fonseca ◽  
Eduardo A. de Almeida ◽  
Roberta Passini
Keyword(s):  
Thermal Comfort ◽  
Building Materials ◽  
Statistical Difference ◽  
Thermal Environment ◽  
Dairy Calves ◽  
Asbestos Cement ◽  
Humidity Index ◽  
Globe Temperature ◽  
Materials Used ◽  
Comfort Indices

Among the building materials used in rural facilities, roofs are noteworthy for being largely responsible for thermal comfort, influencing the thermal balance within the shelter. This study aimed to evaluate the influence of roof on the Enthalpy (H), Thermal Load of Radiation (TLR), and Black Globe Temperature and Humidity Index (BGHI) in individual shelters for dairy calves. The design was completely randomized with three treatments: Z - zinc tile, AC - asbestos-cement tile and ACW - asbestos-cement tile painted white on the upper side. The averages were compared by the Scott Knott test at 1% probability. The results showed no statistical difference between treatments (P<0.01) and the external environment for H. For TLR, there was statistical difference among all treatments, where ACW showed the lowest TLR, 489.28 W m-2, followed by AC with 506.72 W m-2 and Z with the highest TLR, 523.55 W m-2. For BGHI, the lowest values were observed for ACW (76.8) and AC (77.4), differing significantly from Z, which obtained the highest value (81.6). The tiles with white paint on the upper side promoted the lowest TLR and the lowest BGHI, favoring the thermal environment in the shelter.

MAPEAMENTO DE CONTORNO BIOCLIMÁTICO EM AVIÁRIO DE REGIÃO TROPICAL NA CIDADE DE DRACENA/SP

2018 ◽  
Vol 33 (1) ◽  
pp. 52
Author(s):  
Robert Guaracy Aparecido Cardoso Araujo ◽  
Leda Gobbo de Freitas Bueno ◽  
Silvia Regina Lucas de Souza
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Tropical Region ◽  
Poultry Production ◽  
Poultry Facilities ◽  
Relative Air Humidity ◽  
Bioclimatic Variables ◽  
Different Seasons ◽  
Globe Temperature ◽  
Equidistant Points

O ambiente dentro dos galpões avícolas é um dos fatores primordiais para se conseguir bons índices zootécnicos e retornos financeiros. Assim, o objetivo deste estudo foi avaliar o ambiente térmico no interior do galpão de aves poedeiras em diferentes estações do ano na tentativa de proporcionar uma melhor relação ao bem-estar das aves. O estudo foi realizado no galpão de aves poedeiras na UNESP - campus de Dracena/SP. Foram distribuídos e aferidos em doze pontos equidistantes as principais variáveis bioclimáticas, como temperatura de globo negro, temperatura do ar, temperatura de bulbo seco, temperatura de bulbo úmido, temperatura de superfície de telhado, umidade relativa do ar e velocidade do vento. As medições foram feitas nas transições entre as estações do inverno e primavera, primavera e verão e verão e outono, com o intuito de observar qual é a melhor estação do ano em que as aves apresentam um melhor conforto térmico dentro das instalações avícolas. As médias das variáveis bioclimáticas foram comparadas utilizando o teste estatístico Tukey (95%) através do software Statigrafics Centurion, e o software de superfície SURFER para o mapeamento do aviário. Os resultados indicaram que a transição entre inverno e primavera apresentou melhores valores com relação ao conforto térmico dentro do galpão, possibilitando um melhor bem-estar das aves e consequentemente melhor desempenho e retorno financeiro.PALAVRAS-CHAVES: Ambiência, Aquecimento Global, Ondas De Calor, Zootecnia De Precisão. MAPPING BIOCLIMATIC CONTOUR OF A POULTRY SHED IN A TROPICAL REGION IN THE CITY OF DRACENA/SPABSTRACT: The environment inside poultry houses is one of the main factors to achieve good zootechnical indexes and financial returns. Thus, the objective of this study was to evaluate the thermal environment inside the shed of laying hens in different seasons of the year in an attempt to provide a better relation to the welfare of birds. The study was carried out in the poultry shed at UNESP campus in Dracena / SP. The main bioclimatic variables, such as black globe temperature, air temperature, dry bulb temperature, wet bulb temperature, roof surface temperature, relative air humidity and wind speed were distributed and measured at twelve equidistant points. The measurements were taken at the transition between the seasons of winter and spring, spring and summer and summer and fall, in order to obtain the best season of the year in which the birds can obtain better thermal comfort inside the poultry facilities. The averages of the bioclimatic variables were compared using the Tukey statistical test (95%) using the Statigrafics Centurion software, where the SURFER surface software was used to map the aviary. The results indicated that the transition between winter and spring presented better values with respect to thermal comfort inside the shed, allowing a better welfare of the birds and consequently better performance and financial return.KEYWORDS: Environment, Global Warming, Heatwaves, Precision Poultry Production.

scholarly journals CONFORTO TÉRMICO E DESEMPENHO DE POEDEIRAS NA FASE INICIAL

2020 ◽  
Vol 35 (3) ◽  
pp. 388-394
Author(s):  
Fabiana Terezinha Leal de Morais ◽  
José Pinheiro Lopes Neto ◽  
Adriana Maria dos Santos ◽  
Patrício Gomes Leite ◽  
Raissa Gonçalves Cavalcanti
Keyword(s):  
Weight Gain ◽  
Thermal Comfort ◽  
Initial Phase ◽  
Thermal Conditions ◽  
The Third ◽  
Humidity Index ◽  
Globe Temperature ◽  
Black Globe Temperature ◽  
Poultry Farming

CONFORTO TÉRMICO E DESEMPENHO DE POEDEIRAS NA FASE INICIAL   FABIANA TEREZINHA LEAL DE MORAIS1, JOSÉ PINHEIRO LOPES NETO2, ADRIANA MARIA DOS SANTOS3, PATRÍCIO GOMES LEITE4, RAISSA GONÇALVES CAVALCANTI5   1Doutoranda em Engenharia Agrícola: Lacra, UFCG, Avenida Assis Chateaubriand, 101, Liberdade,58414-060, Campina Grande, Paraíba, Brasil. [email protected]. 2 Doutor em Engenharia Agrícola: Lacra, UFCG, R. Aprígio Veloso, 882 - Universitário, 58428-830, Campina Grande, Paraíba, [email protected]. 3 Mestra em Engenharia Agrícola: Lacra, UFCG, R. Alencar Pires de almeida, 07 – Centro, 58748-000, Água Branca, Paraíba, [email protected]. 4 Doutor em Engenharia Agrícola: Lacra, UFCG, R. Aprígio Veloso, 882 - Universitário, 58428-830, Campina Grande, Paraíba, [email protected] 5 Mestra em Engenharia Agrícola: Lacra, UFCG, R. Aprígio Veloso, 882 - Universitário, 58428-830, Campina Grande, Paraíba, [email protected].   RESUMO: Tendo em vista a importância do conforto térmico na avicultura de postura no Brasil, o objetivo geral destapesquisa foi avaliar o conforto térmico no galpão (pinteiro), localizado em uma granja comercial no município de Cuité (PB). A avaliação foi realizada com base nos dados de Índice da Temperatura do Globo Negro e Umidade (ITGU), avaliando o desempenho das pintainhas relacionado ao ganho de peso e as coletas de dados foram realizadas diariamente.Foi utilizado um galpão destinado para a fase de cria para aves da linhagem Lohmann LSL no período da terceira semana para desenvolvimento das aves, avaliando os valores de ITGU e comparando àqueles indicados pela literatura. Como resultados, observamos que foi possível manter as faixas de conforto térmicas bem próximas ao recomendado, e o ganho de peso mantiveram-se abaixo do indicado pelo manual da linhagem, os animais submetidos a condições térmicas adversas apresentaram menor ganho de peso.   Palavras-chave: ambiência, conforto térmico, ganho de peso.   THERMAL COMFORT AND POISER PERFORMANCE IN THE INITIAL PHASE (CRIA)   ABSTRACT: Considering the importance of thermal comfort in poultry farming in Brazil. The aim of this research was to evaluate the thermal comfort in the shed (pestle), located in a commercial farm in the municipality of Cuité - PB. The evaluation was performed based on the data of air temperature (ºC), relative humidity of the air (%), the black globe temperature for determination of the Black Globe Temperature and Humidity Index (ITGU). Weight gain on chicks and data collection were performed daily. The shed for the breeding phase of the Lohmann LSL line was used in the third week for bird development, evaluating the ITGU values and comparing to those indicated in the literature, we observed that it was possible to keep the thermal comfort bands very close to the recommended one, and the weight gain remained distant to that indicated by the lineage manual, the animals submitted to adverse thermal conditions showed less weight gain.   Keywords: ambience, thermal comfort, weight gain.

scholarly journals Development and assessment of a low-cost embedded system for evaluation of animal thermal comfort

2021 ◽  
Vol 14 (3) ◽  
pp. 5-13
Author(s):  
M. V. S. Chaves ◽  
W. G. Vale ◽  
M. M. Cunha ◽  
P. A. C. B. Vale ◽  
A. M. Enes ◽  
...  
Keyword(s):  
Embedded System ◽  
Thermal Comfort ◽  
Production Cost ◽  
Low Cost ◽  
Well Being ◽  
Animal Production ◽  
Productive Potential ◽  
Controlled Environments ◽  
Globe Temperature ◽  
Black Globe Temperature

Technologically advanced animal production requires more controlled environments, aiming to maximize animal performance and, consequently, the profitability of the activity. To do that, it is necessary to instrument, evaluate and diagnose the various rearing environments. Hence, Precision Animal Production is inserted in this context and aims to effectively meet the general needs of the animal, so that it reach its full productive potential, correcting the divergences between the environment and its well-being to guarantee its comfort. Since Brazil is a country with tropical climate, which is a major obstacle, the proposal of this project is to develop a prototype for embedded system of thermal comfort analysis at low cost. Using sensors and the microcontroller Arduino to manage data, this work fulfilled its objective, with a prototype device (WGV-1c) capable of measuring dry bulb temperature, wet bulb temperature, black globe temperature, relative humidity, BGHI and THI with production cost below that proposed by the market.

scholarly journals Microclimate and thermal comfort indices in silvopastoral systems under different planting directions and seasons

2020 ◽  
Vol 24 (4) ◽  
pp. 266-273
Author(s):  
Rafael P. de Carvalho ◽  
Debora M. Heid ◽  
Livia M. C. Davide ◽  
Ligia M. M. da S. Piletti ◽  
Fernanda L. F. de Jesus ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Block Design ◽  
Thermal Conditions ◽  
Radiant Heat ◽  
Control Treatment ◽  
Silvopastoral Systems ◽  
Randomized Block Design ◽  
Globe Temperature ◽  
East West ◽  
Comfort Indices

ABSTRACT The orientation of tree-rows in a silvopastoral system associated with different seasons of the year allows more or less sunlight penetration, resulting in deliberate modification of the microclimate composition and thermal conditions provided to animals. In this sense, the aims of this study were to evaluate microclimatic variables and thermal comfort indices for east-west and north-south oriented silvopastoral systems, compared to unshaded systems during summer and winter. The study was conducted at the Modelo II Farm (21° 08’ S 53° 17’ W) at an altitude of 354 m. A randomized block design in scheme of split-split plots with five repetitions was adopted. Two planting directions and a control treatment (unshaded) were evaluated in the plots. Collection times were evaluated in sub-plots, and the distance from eucalyptus trees was evaluated in sub-sub-plots. Changes in the east-west and north-south planting directions did not promote changes in climate variables, nor did they change the thermal comfort indices during summer. There were differences, however, in temperature and relative humidity of the air, black globe temperature, and radiant heat load during winter. Silvopastoral systems provide improvements in the environment and, concomitantly, to the thermal comfort of animals, when compared to unshaded systems. However, thermal stress situations occur despite the presence of trees, depending on the time of the day and the distance from the rows of eucalyptus trees.

scholarly journals Summer sleep quality and change of bedroom thermal environment – from the beginning to the end of sleep

2019 ◽  
Vol 111 ◽  
pp. 06054
Author(s):  
Noriko Umemiya ◽  
Kurumi Yamagata ◽  
Tomohiro Kobayashi
Keyword(s):  
Sleep Quality ◽  
Thermal Comfort ◽  
Thermal Environment ◽  
Subjective Sleep Quality ◽  
Wet Bulb Globe Temperature ◽  
Subjective Sleep ◽  
Environment Changes ◽  
Globe Temperature

Relations between bedroom thermal environment changes and subjective sleep quality and thermal comfort were surveyed for 63 apartment occupants during midsummer in Osaka. Changes of Wet Bulb Globe Temperature (WBGT) of 123 air-conditioned and 41 naturally ventilated nights were compared. 1) For air-conditioned bedrooms, sleep quality was better for smaller changes of WBGT from the beginning of sleep and for faster changes of WBGT to constant from the beginning of sleep. 2) For naturally ventilated bedrooms, a) WBGT increased from the beginning of sleep and decreased toward the end of sleep for higher sleep quality nights. However, WBGT decreased from the beginning of sleep and increased toward the end of sleep for lower sleep quality nights. b) The WBGT change was smaller for thermally comfortable nights.

scholarly journals Effects of Supply Angle on Thermal Environment of Residential Space with Hybrid Desiccant Cooling System for Multi-Room Control

2020 ◽  
Vol 10 (20) ◽  
pp. 7271
Author(s):  
Joon Ahn ◽  
Ho Yup Choi
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Cooling System ◽  
Living Room ◽  
Comfort Zone ◽  
Computational Fluid Dynamics Cfd ◽  
Dining Room ◽  
Typical Summer ◽  
Globe Temperature ◽  
American Society

In this study, local measurement and computational fluid dynamics (CFD) were employed to evaluate the thermal comfort in a residential environment where desiccant cooling is performed in an outdoor air condition, which is the typical summer weather in Korea. The desiccant cooling system in the present study has been developed for multi-room control with a hybrid air distribution, whereby mixing and displacement ventilation occur simultaneously. Due to this distribution of air flow, the thermal comfort was changed, and the thermal comfort indicators conflicted. The evaluation indicators included the ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) comfort zone, predicted mean vote (PMV), and effective draft temperature (EDT). The dry-bulb temperature displayed a distribution of 26.2–26.8 °C in the cooling spaces, i.e., living room, kitchen, and dining room. When determined based on the standard ASHRAE comfort zone, the space where desiccant cooling takes place entered the comfort zone for summer. Due to the influence of solar radiation, the globe temperature was more than 2 °C higher than the dry-bulb temperature at the window. A difference of up to 6% in humidity was observed locally in the cooling space. In the dining room located along the outlet of the desiccant cooling device, the PMV entered the comfort zone, but was slightly above 1 in the rest of the space. Conversely, as for the EDT, its value was lower than −1.7 in the dining room, but was included in the comfort zone in the rest of the space. By adjusting the discharge angle upward, the PMV and EDT were expected to be more uniform in the cooling space. In particular, the optimum discharge angle obtained was 40° upward from the discharge surface.

scholarly journals Thermal comfort findings: Scenario at Malaysian automotive industry

2013 ◽  
Vol 17 (2) ◽  
pp. 387-396 ◽  
Author(s):  
Ahmad Ismail ◽  
Kumar Karagaratnan ◽  
Kumaran Kadirgama
Keyword(s):  
Thermal Comfort ◽  
Automotive Industry ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Human Subjects ◽  
Demographic Data ◽  
Working Environment ◽  
Paint Shop ◽  
Wet Bulb Globe Temperature ◽  
Globe Temperature

This paper discusses the findings of thermal comfort assessment at Malaysian automotive industry. Nine critical workstations were chosen as subjects for the study in order to determine the thermal comfort among workers at Malaysian automotive industry. The human subjects for the study comprises of the operators from tire receiving, dashboard assembly, drum tester, body assembly, seat assembly, door check assembly, stamping workstation, engine sub assembly and paint shop of the factory. The environmental factors such as Wet Bulb Globe Temperature (WBGT), relative humidity, air velocity, illuminance were measured using BABUC A apparatus and Thermal Comfort Measurement equipment. Through questionnaire survey, the demographic data of subjects and their perceptions on thermal comfort at each workstation were assessed based on ISO Standard 7730 and thermal sensation scale using Predicted Mean Vote (PMV). Then, Predicted Percentage of Dissatisfied (PPD) is used to estimate the thermal satisfaction of occupants. The results indicated that most of the workstations of the automotive industry are considered as uncomfortable. Tire receiving station is considered having better working environment compared to other stations with lowest PMV index of 1.09 to 1.41 and PPD of 46%. Meanwhile, the engine sub assembly station and paint shop of assembly are considered the worst thermal environment with the PMV index values ranging between 2.1 to 2.9 and PPD values of 81% to 99%. Therefore, these two workstations are considered not comfortable because the thermal sensation scale is warm and almost hot.

scholarly journals Effects of air temperature on physiology and productive performance of pigs during growing and finishing phases

1970 ◽  
Vol 48 (4) ◽  
pp. 627-635
Author(s):  
R.F. Oliveira ◽  
R.H.R. Moreira ◽  
M.L.T. Abreu ◽  
M.P. Gionbelli ◽  
A.O. Teixeira ◽  
...  
Keyword(s):  
Heat Stress ◽  
Thermal Comfort ◽  
Thermal Environment ◽  
Block Design ◽  
Carcass Composition ◽  
Experimental Unit ◽  
Productive Performance ◽  
Negative Effects ◽  
Randomized Block Design ◽  
Final Weight

Thirty-six castrated male pigs were used to determine the influence of thermal environment and reduction of consumption on performance and carcass composition. Animals were housed in two climate chambers. In one, animals were in thermal comfort (TN) (22 °C), and in the other, pigs were under heat stress (HS) (34 °C). Animals were distributed in a randomized block design, making three treatments (TN, HS and animals in thermal comfort with food consumption paired with that observed in HS (PFTN)), with six replicates and two animals per experimental unit. Data were obtained on performance and carcass composition. The weight gains of HS and PFTN animals were reduced by 40.5% and 34.7%, respectively, reflecting a reduction of 13.2% in the final weight of PFTN animals. Triiodothyronine concentration was not affected by heat, but there was an increase in lymphocyte numbers in PFTN animals. The HS and PFTN animals showed lower hot carcass weight. However, there were no effects on hot carcass yield and relative weights of heart, lung and spleen. Heat stress compromised performance. The negative effects of high temperature on pigs include reduction in feed intake and changes in physiology.Keywords: Environment, heat stress, pair feed, pig growth, pig production

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