Single flow temperature control

$1 475.00

Versatile flow through heating & cooling unit for controlling temperature of liquids and cells. Can be operated by

heating on a lab heating plate
heat cartridges (not included) inserted into the unit
cooling and heating water/liquid
can heat only one electrolyte stream

Liquid is in contact with high temperature and chemically resistant PEEK, PTFE and polymer fittings only.

Read more about the product

Isolation Tube 2 meter × 2

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About the product

Shown in the figure below, the PEEK flow body is placed on top of an aluminium block. The aluminium block is protected by a thin PTFE sheet to prevent corrosion of the aluminium. The lower aluminium block is placed on a heating plate that is used for controlling the temperature of the liquid flowing through the PEEK flow body.

As an alternative to using a heating plate, the aluminium block can be heated/cooled by circulating heating/cooling water through the aluminium block. This configuration can also be operated with heat cartridges.

This PEEK flow body only has one channel and can only heat one electrolyte. For this reason it can be used for e.g. alkaline water electrolysis where the electrolyte in some cases is shared between the two sides or for higher power operation where each electrolyte has its own heating.

PEEK flow body 100 mm x 100 mm x 18mm

2 x Swagelok fittings for 1/8’’ OD tubes – 1/8 NPT thread – for other tube diameters please make an inquiry

Aluminium block 100 mm x 100 mm x 21 mm

4 x Threads for 1/8’’ BSPP fittings – for heating cooling water
2 x Through hole for 1/8’’ for heat cartridges (1 to 4 cartridges) – heat cartridges not included
Different holes for thermometer (3.5 mm)
Holes for mounting the heat cartridges with screws to prevent it from falling out during operation

All bolts and washers are included

Assembly manual (to be updated)

Performance data

Due to the many configuration of this unit all options have not been tested. Nonetheless the data below shows the general performance of the unit.

Heat transfer coefficient
Graph below shows the heat transfer coefficient between the aluminum block and the liquid. It is measured by heating about 500 mL of water in a bottle (without an electrochemical cell) by placing the heating unit on a heating plate where the aluminum block temperature is fixed and the temperature in the bottle is monitored.

The heat transfer coefficient is in the range 1 W/K to 5 W/K and dependent on the flow rate. We term the coefficient ‘apparent’ as it is does not strictly follow the definition of the ‘overall heat transfer coefficients’. Nonetheless, the coefficients can be used for estimating the heat transfer power between the unit and the liquid. I.e. if there is a 40 K temperature difference between the aluminum block and the liquid and the flow rate is 100 mL/min it can be expected that 100 W of heat is transferred.

Bottle heating
Graph below shows a configuration where the unit is placed on a heating plate and connected to a pump and a bottle with 500 mL of water (i.e. an electrochemical cell is not included in the circuit). The heating plate has maximum 600 W heating power and PID control, where the input for the control is an external thermometer, which in this case is placed in bottle. In addition to this thermometer, one is also placed inside the aluminum block. In this test, the water temperature set-point in the bottle was set at 75°C. It is seen that the water reaches 75°C within 15 minutes and stability is reached within about 35 minutes. Better control strategies can shorten time before stability.

Cell & Bottle heating
Graph below shows a configuration where the unit is placed on a heating plate and connected to a pump. The heating unit is placed after the pump and followed by an electrochemical cell and a bottle. The total water volume is 500 mL. The heating plate has maximum 600 W heating power and PID control, where the input for the control is an external thermometer. In the case the control thermometer is placed inside the cell (in close vicinity to the current collector). It is seen that temperature stability is reached within about 35-45 minutes. More aggressive temperature control strategies where temperature over shooting is allowed will decrease time to reach the temperature set-point.

Support & Inquiry

Do you have specific questions or would you like help in selection and configuration of our product:

Single flow temperature control

You are very welcome to contact us in the form here. We are ready to support you in selecting the best solutions for your R&D.

Always include as much information as you can about your project, what type of chemistry you are planning to use, what is the purpose of the equipment you are interested in. That will make it much easier for us to guide you towards the best solution for your project.