Calorimetry/CofluxTM

Click here to see the Coflux Calorimeter

Calorimetry is a valuable tool for the process chemist.  Unfortunately, current techniques have many drawbacks.  In simple terms, as shown in the table below, existing techniques are either accurate but difficult to use, or easy to use but inaccurate.

If a calorimeter could achieve the three goals of accuracy, repeatability, and usability, then it would have a host of applications in Process Analytical technology (PAT), as well as wider use in day-to-day laboratory work.

Now, Coflux^TM technology offers this capability in a low cost package.

	Temperature Control	Measurement Repeatability	Usability*
Adiabatic/pseudo adiabatic
Power compensation
Heat Flow
Heat Balance
CofluxTM
	* Usability Calibration Stability of calibration under changing process conditions Speed of measurement Interference with process (heating elements, process delay)

Coflux^TM is a new approach to Heat Balance calorimetry

q = mC_p(T_out-T_in)

Where:
q = Heat added or removed
m = Mass flow of heat transfer fluid
C_p = Specific heat capacity of heat transfer fluid
T_in = Temperature of  heat transfer fluid entering
T_out = Temperature of heat transfer fluid returning

Existing calorimetry techniques:

Heat Balance	Heat Flow	Power Compensation
q = mCp( Tin- Tout )	q = U.A.LMTD	q = i – io
Very simple to use Calibration is linked to a material of constant property (the HT fluid) Very poor sensitivity A large fixed heat transfer area which limits sensitivity Large HTF flow limits turndown Heat measurement conflicts with temperature control Temperature controller has to be locked to prevent large enthalpy disturbances associated with temperature control	Difficult and time consuming to use Calibration is linked to process conditions which often change. Patience, skill and training to use (multi calibrations are often required) Impacts on process operation Calibration delays and/or heater affects process operation Poor repeatability Calibration is process specific and very unstable Poor scale up characteristics Non uniform U values

Click here to find out how Coflux^TM works

Click here to find out why you should use Coflux^TM

For more information see the Coflux^TM product section, FAQs or contact us.