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Temperature regulation bench for a circulating liquid


Dimensions : 1200 mm x 800 mm x 1300 mm
Poids : 90kg

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Description :

This bench highlights the fundamentals of temperature regulation of a circulating liquid
 

Operation


A centrifugal pump (3 flow) recycles water from a main tank through a heater / cooler. A regulator
installed in an electrical cabinet, regulates the temperature of the liquid according to one of the 3 modes chosen by the student:
power dosage
Manual adjustment of P.I.D.
Automatic setting of P.I.D. (Self-adapting).
The information "temperature" may come, depending on the handling, a probe placed on the main tank or another located at the outlet of the heater / cooler.
The control of the electric heater is carried out by adjustable period wave trains (approximately 2 seconds) through a 40 amp static unit. The control of the water cooler is carried out by adjustable period wave trains (approximately 16 seconds) through a solenoid valve.
A secondary tank can discharge its contents into the suction circuit of the pump by opening a tap. It makes it possible to study the influence of a disturbance in the control loop. It is equipped with a needle thermometer.
 

descriptive

The bench consists of a frame on which are fixed the essential components of a temperature control process for circulating liquid :

  •     Electric heater / water cooler
  • Variable flow pump
  • Tanks and pipelines
  • Electromechanical equipment
  • Level sensor
  • Temperature probes
  • Temperature regulator
  • Static power unit
  •  Digital indicator
  • Valves and solenoid valve

    It is provided :

    Horizontal plane allowing the installation of measuring or recording devices
    A storage drawer for tools and documents
    Vertical plane with DIN rails for the subsequent attachment of electrical devices
    Two 230V mono power outlets for powering the measuring devices.
    It is mounted on wheels (including 2 fixed and 2 adjustable) to facilitate its possible movement.

Objectifs Pédagogiques :
  • Electric heating of a circulating liquid.
  • Implementation of a temperature controller.
  • Basic principles of a regulation loop.
  • Mixing two liquids of different temperatures.
  • Power control by static unit with wave trains.
  • In addition to the overall study of the system or its functional subsystems, this bench is designed to facilitate the assembly and use of prototypes made by students.
Spécifications techniques :
  • Polyethylene main tank with lid, temperature sensor, low level sensor and visual level
  • Polyethylene secondary tank with thermometer and visual level
  • 230 V mono centrifugal pump with 3 flow rates
  • Mono heat exchanger / heat sink with thermal cut-off at 110 ° C.
  • Hydraulic connection on the mains water network, by quick couplings supplied
  • PVC drain valve and pipes
  • Power supply on terminal block inside the cabinet 2 P + T in 230 VAC / 40A max.
  • Power outlets 230VAC + T / 6A max
  • Digital temperature display, LEDs and control switches on the front panel
  • Mechanically welded and painted chassis
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