Water Temperature Control Bench Hydrotherm

Water Temperature Control Bench Hydrotherm

Teaching Objectives of Water Temperature Control Bench Hydrotherm

The bench is designed to be self-contained and only need an electrical power supply.

It allows to study an important number of subjects:

Temperature Sensor

• Sensor performance (answer time, linearity, hysteresis).
• Justification about to use a continuous current power generator.
• Justification of the wiring with 3 wires.

Energy Modulation

• Functioning principle of the modulators.
• Problem of peak intensity during the starting.
• Modulators performance: Static power unit, Wave train dimmer.
• Functioning cycle, life time

Determination Of The Heating Power

• Calculation of the heating power.
• Observation of the temperature influence when bringing a cold piece.
• Experimental determination of the heat loss coefficient.
• Temperature distribution in the bench.
• Influence of the water level
• Temperature Control.
• Automatic control methods.
• Adjustment by discontinuous actions.
• Controller P.
• Controller PI.
• Controller PID.
• Controller PID self adaptative.
• Process answer.
• Temporal analysis.
• Influence of the setting, the mass of water, the disturbance.

Technical specifications

Operative Part:

The bench is made out of an aluminium frame on castors including:

• A 25 litres tank.
• An immersed electrical heater.
• A temperature sensor.
• A ” low level” sensor.
• A security thermostat.
• A stainless steel body centrifugal circulation pump.

OPTION: Data acquisition system

The data acquisition system is proposed in option. It is made out of a data acquisition card to place into a PC computer and a software functioning under Windows®. This software allow to visualize the sizes in real time and to record them. The card is linked to the bench by the help of a plug on the front side of the electrical cabinet door.

Control Part:

An electric cabinet including:

• The power supply and safety devices of the installation: circuit breaker, contactor, fuses, transformer.
• The heating controller: 1 power unit by train of waves.
• A dimmer (in option) can be connected on the side of the cabinet (the use of another dimmer that the one proposed in option is possible on special enquiry).
• A converter for the Pt 100 probe.
• The control components.
• A PID controller auto adaptive.
• A thermostat.
• The controller and the thermostat are integrated in a synoptic on the front side of the cabinet. The synoptic, also include various measuring points permitting the study of the control loop.

Dimensions and weight

• 1150 x 670 x 1470 mm – 98 kg

Essential requirements

• Electrical power supply: single phase 230 V+T 16A