Abstract
The technology of snow-utilization is consisted with (i)gathering snow and transportation, (ii) storing and (iii) snow using such as cold heat source. In the field of the gathering and the transportation of the snow(i) , the heavy equipment machine such as the rotary type snowplow that have already used it in the snow-removal work is diverted and used. Because energy density of snow to be low, and, therefore, it has low economical value. Even if it is not too big power, the snow is easily transformed into a clod. Therefore, the use of transportation snow with air (solid-air two-phase flow) has been limited to the minimum in the popular snow machines of such as the rotary type snowplow. Therefore, there is few case to use the solid-air two-phase flow in the field of the gathering and transporting the snow (i) and (ii). However, the multi-phase flow plays an important role in the use of the snow like the extraction of cold heat from the snow in the fields of (iii). It is because a lot of movements of vapor and droplets of water are used at the same time in the heat exchanging between the snow and air. In this paper, the author described an introduction of the snow utilization technology necessary to talk about the multi-phase flow related to the snow utilization, the example of the multi-phase flow in the field of the snow utilization, and described the views of them.
