Using meteorological data to determine the risk of heat stress

A mathematical model of thermodynamic changes in the moist air inside a stable was designed using a computer program called MathCAD. Calculations of air temperature and humidity were carried out in poultry houses with layer hens. They were based on outdoor air characteristics and hens' biologic...

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Vydané v:	Research in Agricultural Engineering (Praha) Ročník 52; číslo 2; s. 39 - 47
Hlavní autori:	Sleger, V.(Ceska Zemedelska Univ., Prague (Czech Republic). Technicka Fakulta) E-mail:sleger@tf. czu.cz, Neuberger, P.(Ceska Zemedelska Univ., Prague (Czech Republic). Technicka Fakulta)
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Prague Czech Academy of Agricultural Sciences (CAAS) 01.06.2006 Czech Academy of Agricultural Sciences
Predmet:	ACONDICIONAMIENTO DE AIRE air AIR CONDITIONING Air cooling air humidity AIR TEMPERATURE ALOJAMIENTO PARA AVES Animal production Animals biological production Climatic conditions CLIMATISATION Computation CONTROL AMBIENTAL CONTROLE DU MILIEU COOLING Cooling systems DESEMPENO EN LA POSTURA Egg laying eggs ENFRIAMIENTO ENVIRONMENTAL CONTROL ESTRES TERMICO EVAPORACION EVAPORATION evaporation cooling Evaporative cooling GALLINA PONEDORA GALLINAS Graphs HEAT STRESS Heat tolerance HENS HUMEDAD RELATIVA HUMIDITE RELATIVE humidity LAYER CHICKENS laying hens LAYING PERFORMANCE LOGEMENT DES VOLAILLES MATHEMATICAL MODELS Meteorological data MODELE MATHEMATIQUE MODELOS MATEMATICOS PERFORMANCE DE PONTE POULE PONDEUSE POULETTE POULTRY HOUSING REFROIDISSEMENT RELATIVE HUMIDITY risk STRESS THERMIQUE TEMPERATURA DEL AIRE TEMPERATURE DE L'AIR temperature-humidity index VENTILACION VENTILATION
ISSN:	1212-9151, 1805-9376
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Popis
Shrnutí:	A mathematical model of thermodynamic changes in the moist air inside a stable was designed using a computer program called MathCAD. Calculations of air temperature and humidity were carried out in poultry houses with layer hens. They were based on outdoor air characteristics and hens' biological production. Meteorological data were monitored hourly from May to August during the years 2000 to 2002. The calculated values were used to assess the potential of evaporation cooling in mild climatic conditions. The model may also be used to calculate the time the animals spend at a certain temperature before it is lowered by cooling. For example, in June 2002, the time the animals were exposed to 27 deg C was reduced from 39 to 22 h, and in July, it was from 33 to 4 h.
Bibliografia:	2006000555 L74 N10 http://www.cazv.cz/UserFiles/File/ZT%2052_39-47.pdf ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	1212-9151 1805-9376
DOI:	10.17221/4878-RAE