AN EXPERIMENTAL DESIGN FOR MEASURING THERMAL CONDUCTIVITY OF ICE BASED ON PASCO SYSTEM

In response to the difficulty of measuring the thermal conductivity of low-temperature objects using traditional steady-state methods, a thermal conductivity measurement device based on the Pasco system has been designed, which can obtain the law of the thermal conductivity of ice changing with its own temperature. A plane heat source with constant power is used to perturb one side of the temperature stable ice block. When heat is conducted in the medium, it is found that the temperature change of the ice surface at a certain depth from the disturbed surface meets the boundary conditions related to thermal conductivity. Based on this characteristic, a constant power heating plate is used to heat the central plane of the temperature stable ice block. The Pasco system is used to detect the variation of the heating plate plane and the temperature of the ice surface at a certain depth with heating time. The relationship curve between the thermal conductivity and the ice block temperature is obtained through the first integration of the Gaussian error compensation function, and a new experimental scheme for studying the thermal conductivity of ice is proposed. The COMSOL simulation results show that this method has accurate real-time measurement data, high reliability, and good experimental promotion and application value.