This equipment enables to determine temperature distribution and heat flow for solid shapes of simple geometry suddenly dipped into a fluid at constant temperature. Monitoring the temperature at the centre of the object enables to analyze the heat flow. Another thermocouple will measure the temperature of the water adjacent to the same shape and supply an accurate data item for measuring the time of immersion in hot water. The equipment consists of a bath of heated water and of a set of solid shapes: a rectangular slab, a long cylinder and a sphere. Each shape includes a thermocouple to measure the temperature at the centre of the shape and is made of materials with different thermal conductivity (brass and stainless steel). The large volume of water in the bath ensures that any change in water temperature is negligible when measurements are carried out.
A water flow output by a circulation pump ensures that the modes of heat transfer are constant and the water surrounding the shape is kept at constant temperature. A thermocouple available in water bath enables to check water temperature and to adjust it to the right value before the shape is immersed. A thermocouple mounted on the shape holder comes into contact with the hot water at the same instant as the solid shape, thus ensuring an accurate data item for measurement of temperature versus time.
TRAINING PROGRAM
This unit enables to develop and analyze the following issues:
• Heat transfer for bodies of different material and shape, in unsteady-state conditions
• Analyzing the results on charts of temperature / heat flow
• Using the results to determine the conductivity of a similar shape of different material.
TECHNICAL CHARACTERISTICS:
• Thermal bath of 30 litres with approx. 3kW electric resistor, thermostat and circulation pump
• Set of solid shapes of brass including thermocouple: rectangular slab, cylinder and sphere
• Set of solid shapes of steel including thermocouple: rectangular slab, cylinder and sphere
• K-type thermocouple for measuring water temperature
