Roof pitch and exposure and different roofing materials in reduced models of animal production facilities in the fall and winter

MELO, Thiago Vasconcelos; FURLAN, Renato Luís; MILANI, Adhemar Pitelli; BUZANSKAS, Marcos Eli; MOURA, Adolpho Marlon Antoniol de; MOTA, Diego Azevedo

doi:10.1590/S1519-99402015000300016

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Revista Brasileira de Saúde e Produção Animal

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Sumário

Produção Animal e Ambiente • Rev. bras. saúde prod. anim. 16 (3) • Sept 2015 • https://doi.org/10.1590/S1519-99402015000300016 copy

Roof pitch and exposure and different roofing materials in reduced models of animal production facilities in the fall and winter

Inclinação e exposição de telhado e diferentes materiais de cobertura em modelos reduzidos de instalação zootécnica no outono e inverno

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective was to verify the influence of roof pitch, exposure and roofing material on the internal temperature of reduced models of animal production facilities. For the development of the research, 48 reduced models with dimensions 1.00 × 1.00 × 0.50m were used. The roof was shed-type, and models faced the North or South directions, with 24 models for each side of exposure. Ceramic, galvanized-steel and fibro tiles were used to build the roofs. Pitches varied between 20; 30; 40 and 50% for the ceramic tile and 10; 30; 40 and 50% for the other two. Inside the model, temperature readings were performed at every hour, for 12 months. The results were evaluated in a general linear model in a nested 3 × 4 × 2 factorial arrangement. As the roof pitch increased, the internal temperature within the model dropped, so utilizing sharper pitches (50%) for ceramic and fibro roofs with a larger area facing the South can provide lower temperatures within the animal production facilities. In regions where the cold is more stressful than the heat, having animal production facilities with larger roof exposure to the North may minimize the losses caused by cold stress.

ambience; aviculture; heat; shed

Estimated radiation (cal/cm²/day)
Station	10N	10S	20N	20S	30N	30S	40N	40S	50N	50S
Fall	503.8	413.8	541.3	365.2	572.5	315.9	597.4	267.6	616.3	221.5
Winter	495.9	422.8	524.8	380.9	547.8	337.4	565.2	293.9	577.3	251.6

Fall
	Ceramic		Fibro		Galvanized steel
	North	South	North	South	North		South
10%	-	-	31.29^a	31.47^a	32.93^a		32.93^a
20%	32.13^a	31.46^a	-	-	-		-

30%	32.34^ab	31.12^bc	31.56^bc	30.23^c	32.92^a		32.78^ab
40%	32.32^a	30.42^bc	31.92^ab	30.28^c	33.42^a		32.51^a
50%	32.55^ab	29.17^c	31.58^b	29.50^c	33.91^a		32.55^ab
Winter
	Ceramic		Fibro		Galvanized steel

	North	South	North	South	North	South

10%	-	-	32.68^a	32.58^a	34.39^a	34.00^a
20%	33.58^a	32.67^a	-	-	-	-
30%	33.70^ab	32.28^bc	33.03^ab	31.35^c	34.05^a	33.66^ab
40%	33.86^a	31.72^bc	33.64^ab	31.59^c	34.96^a	33.73^a
50%	34.33^a	30.26^b	33.33^a	30.73^b	34.55^a	33.63^a

Materials	Fall		Winter
Materials	North	South	North	South
Ceramic	32.34^aB	30.54^bB	33.87^aAB	31.73^bB
Fibro	31.59^aB	30.37^bB	33.17^aB	31.56^bB
Galvanized steel	33.30^aA	32.69^aA	34.49^aA	33.76^aA

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[1] *Endereço para correspondência:thiago.melo@ufvjm.edu.br