J.of Soc of Agri Struc, Japan.
Vol.27,No.1 June 1996,11-20
Original:
Language: Japanese

    A snow melting method using warm exhaust air from livestock buildings was developed. Results are summarized below:

1. Experiments were done at the two mechanical ventilated swine buildings in Takikawa city in the winter of 1990 to 1991. The inside air temperatures of the two buildings were about 20 centigrade and 10 centigrade, respectively. Exhaust air from the fans was led to ducts installed on the ground and discharged to snow on the eaves. The exhaust air melted enough of the snow on both buildings with the minimum ventilating rate in cold weather that there was no need to remove snow from the eaves.
2. The ducts made of concrete bricks used for discharging exhaust air showed a higher effective heat utilization ratio than that of polyethylene tubes and plastic drain pipes.
3. Based on experimental results, changes in the depth of snow accumulating on the eaves were estimated for the swine buildings in Iwamizawa city using a simulation of the snow melting method. Even if the inside air temperature was 10 centigrade, there was little need to remove snow from the eaves of the buildings in a year of normal snow fall.
4. Additional experiments investigated the influence of air humidity on melting snow. Results demonstrated that air with higher relative humidity melted more snow.

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