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Natural Convection and Radiation Apparatus- Engineering Lab Training Systems.
Technical Description
This
unit enables a broad range of experiments to be performed on the
transfer of heat in gases. At raised pressures the energy is primarily
transported by convection, while at low pressures the energy is
transferred by radiation. An electrically heated metal cylinder is
fitted inside a pressure vessel that can be evacuated. Low pressures
down to 1 Pa absolute are generated using the vacuum pump fitted. Gauge
pressures up to 1 bar can be obtained by using an external compressed
air connection. It is also possible to investigate heat transfer in
other gases, e.g. nitrogen, helium or carbon dioxide. The heater power
is adjustable and is measured via the voltage and current. The surface
temperatures of the heating element and the vessel wall are displayed.
The pressure measurement is made using a piezoelectric pressure sensor.
At very low pressures a Pirani manometer is used.
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