Soil Thermal Conductivity Study in Western Coastal Zone of Taiwan

摘要

The thermal conductivity which governs the flow of heat through the soil is defined as the quantity of heat that flows through a unit area in a unit time under a unit temperature gradient. This characteristic of soil is usually concerned by power cable designer because of copper resistance during power transitions in both underground and submarine circumstance.rnThe study employed field needle shaped probe to measure 4 points on the beach in Penghuo Island of Taiwan and conduct 12 laboratory tests to measure the thermal conductivity. The soil of beach was categorized to be middle-fine sand with coral skeleton. For simulating the situation of water content of soil on beach varied with the tidal level and the run up of wave, the needle probe instead of micro variation to measure the average thermal conductivity. The results of filed investigation varied from 0.8W/mK to 1.17W/mK, under 27 degree Celsius of circumstance and being similar to Nidal's measurement of sand ranged from 0.58 to 1.94.