Control of Snow Melting by Insulation

Abstract

Storage of snow and ice has been carried out from ancient times. In 19 centuries ice was transported in world wide. Storage house for ice was built in America, London, Livapoor and others. In Japan, ice was stored in underground already 700 A.D. In Meiji to Shyowa epoch, many storage houses of ice and snow, Himuro were built in Hokuriku and Tohoku Districts. In Nagaoka the snow of 7000 m3 in volume was collected that was named 'Yuki-nio'. In recent year, snow was noticed again as natural energy. Vegetables and grains were stored in snow. It is start to use snow for. air-conditioning as cooling heat sources.The control of snow melting was experimentally examined. Five kind of snow mound in the volume 120 m3, were built on open ground and.the surface was covered by soil, chaff, chaff in bag, glass-wool, and foam and then covered with plastic sheet. The process of melting was examined. Snow vanished in August in the case of the cover with soil, September with glass-wool, and remained untill next January with chaff. The average air temperature was 10°C in April and 25°C in August.