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Teaching suggested applications*

-          Study of a concentric tubes exchanger

-          Comparison of a co-current circulation or counter-current

-          Temperatures and flow rates measurements

-          Thermal power calculation

-          Calculation of the exchange coefficient

-          Study of the influence of hot and cold water flow rates

-          Demonstration of the laminar and turbulent regimes

Description

The BET 040 bench allows to study a concentric tubes exchanger system. The hot water produced in the stainless steel tank is heated by a heating resistor, it is then sent to the exchanger thanks to a centrifugal pump. Cold water comes from the water supply network. The instrumentation allows the user to follow what happens in the exchanger. They can measure the water flows and temperatures. All of the valves will allow to change the direction of the water inside the exchanger and allow operation in co-current or counter-current.

After a stabilization period, students must record the operating parameters (temperature, flow rate) in order to calculate the different values required in the practical works.

The robust design of this equipment makes it perfectly suited for use in schools.

Its anodized aluminum structure on multidirectional wheels with brakes makes it extremely robust as well as great flexibility of integration into your premises. The manufacturing of this equipment meets the European machine directive

1. A heat exchanger with concentric tubes

     Equipped with several temperature measurements

2. Stainless steel tank of hot water

    Tank capacity 70 L

    3 kW electrical resistance for heating water

    Low level probe

    Safety thermostat

    Temperature probe, thermocouple of type T

3. Centrifugal pump with magnetic drive

     Maximum flow rate of 570 L/h

4. Hot water flowmeters with needle control valveand selector valve of the flowmeter used. Scales: 0.2-3 L/min and   1-10 L/min

5. Cold water flowmeters with needle control valveand selector valve of the flowmeter used. Scales: 0.2-3 L/min and   1-10 L/min

6. 6 thermocouples of type Tfor measuring the temperature of the hot water and the cold water inlet, at the middle and at the outlet of the exchanger

7. 4 Selector valves of co-current mode or counter-current

8. Filling valve of the hot water tank

9. Drain valve of the hot water tank

10. Inlet valve of cold water to connect to the network

11. By-pass valve

• Power supply: 230 VAC – 50 Hz – 32 A
• Power supply Type: 1-Phase + Neutral + Earth
• Cold Water supply: 20 L/min – 2 bars
• Cold water drainage: at ground level
• Volume hot water tank: 70 L