Abstract
We report on a direct contact airflow type snowmelt system using exhaust heat, which flows air quasi-uniformly from the surface of the water-and-air permeable concrete block or surface. Two different types of the system have been verified as a reliable snowmelt system through experimental study. One is unit block type, and the other is construction site deposit type. The unit block type has hollow plastic cubic structure under the water-and-air permeable concrete block. The heat source is residential exhausted heat and delivered to the snowmelt site by electric fan. The construction site deposit type has perforated tube under the water-and-air permeable concrete surface. The heat source is taken from sewer manhole inflow which hot spring waste water comes in. Both of the system showed capable performances as snowmelt system at the test site installed in Hokkaido district.
