MEASURING EQUIPMENT OF RATE OF HEAT DOFFUSION FOR FLUID

摘要

PURPOSE:To measure the rate of heat diffusion by analyzing the temperature rise in the lower plate when the heat flux is added to the sample fluid from the upper plate, where the sample fluid is filled up in the space between the upper plate with heater and the lower plate with temperature measuring device. CONSTITUTION:The heater 1 is composed of the basic plate 1a the lower part of which is metallized by platinum 1b at constant thickness, where the layer of platinum is covered by the electric insulator of alumina in order to insulate from the sample fluid. The temperature measuring device 3 is composed of the basic plate 3a the upper part of which is metallized by the temperature measuring device of platinum 3b, where the layer of platinum is covered by the electric insulator of alumina. The space 6 is composed of the heater 1 and the temperature measuring device 3 intervened by the side spacer 2. The sample fluid is filled up in the space 6 from the hole 7. After maintaining the whole of the equipment at constant temperature by the external heaters, the step functional electric current is applied to the metallized layer of the heater 1. The rate of heat diffusion is measured by recording and analyzing the temperature rise in the sample fluid by the temperature measuring resistance.