Products  |  Thermodynamics, Heating and Sanitary Systems  |  Fundamentals of Thermodynamics  |  WL 377
WL 377 Natural Convection and Radiation Apparatus Show data sheet (pdf file)
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.
Learning Objectives / Experiments
· Heat transfer by convection at atmospheric pressure
· Heat transfer by convection at raised pressures (pabove atm. max. 1bar)
· Heat transfer by radiation at low pressures (vacuum)
· Heat transfer by radiation and convection at intermediate pressure
Features
Heat transfer by convection and radiation in gases
2 pressure measurement ranges for higher resolution
Variable adjustment of the heater power
Heat transport in gases at different pressures
Specification
[1] Apparatus on heat transfer by convection and radiation in gases
[2] Adjustable heater
[3] Vacuum pump 370W, nominal suction capacity 5m³/h
[4] Thermocouples type K
[5] Pressure measurement using Pirani manometer
[6] Pressure measured by pressure transmitter
[7] Digital displays for temperature, pressure, voltage, and current
[8] Operation with different gases possible
[9] lxwxh 1100x650x1400mm, 70kg
[10] 230V, 50/60Hz, 1 ph. or 120V, 60Hz, 1 ph.
Technical Data
Heater: 10W
Radiation surfaces: heater sleeve: 55cm², vacuum vessel, inner sleeve: 0,2m²
Vacuum pump: 370W, nominal suction capacity: 5m³/h
Pressure range: 10-5...2bar absolute
Measuring ranges:
- pressure below atmospheric: 5x10-4...1bar
- pressure: -1...1.5bar rel.
Dimensions and Weight
l x w h : 1100 x 650 x 1400 mm
Weight : approx. 70 kg
Connections
230V, 50/60Hz, 1 ph. or 120V, 60Hz, 1 ph.
Compressed air: 1.5bar
Scope of Delivery
1 apparatus, 1 instruction manual
Order Details
060.37700 WL 377 Natural Convection and Radiation Apparatus
© 2005 G.U.N.T. Gerätebau GmbH