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THERMAL CHARACTERISTICS OF A HOOP STRUCTURE FOR SWINE PRODUCTION
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Transactions of the ASAE. VOL. 40(4):1171-1177. (doi: 10.13031/2013.21338) @1997
Authors: A. Tanaka, H. Xin
Keywords: Low-cost swine building, Thermal environment, Air distribution
The thermal performance of a low-cost, hoop-type swine building (3.55 × 5.7 × 10.3 m) was evaluated under
the winter weather conditions of Central Japan. The hoop building had two curved roofs made from 2.5 cm diameter
tubular steel pipes each covered with a reflective film. There was a 20 cm air space between the inner and outer covers
through which the exhaust air flowed. A positive-pressure ventilation fan and an air distribution duct were used to supply
the fresh air. The evaluation was conducted for three opening configurations of the air distribution duct (one, two, or four
holes on a cross-section of the duct) and presence or absence of an internal curtain. Furthermore, the effect of replacing
the reflective film with a PVC film for the east side cover on solar transmission and thus the internal temperature rise was
quantified. The building was simulated to house 30 pigs at a body weight of 70 kg. Resistive heating wire was used to
simulate the sensible heat generation of the pigs at 131.5 W/pig at 10°C temperature.