Stabilization of Joule Heating in the Electropyroelectric Method

Differential microthermometry enables high-throughput calorimetry

“…20 The conventional approach is the differential scanning calorimetry (DSC), where the heat given to the substances is measured by heat flux sensors or calculated by measuring the temperature difference along a conduction pathway via Fourier's law. The measurement accuracy relies on the minimization of uncontrolled modes of heat gain (e.g., Joule heating from sensors) 21 or heat loss (e.g., through the sample container or sensor wires). 22,23 As a result, C p measured by different instruments can vary by up to B7% for the same compound.…”

“…20,44 Despite the potential for high throughput calorimetry, the challenge of thermal management at small scales has limited the field. 21,22 Here, we propose an alternative method to measure the specific heat capacity of fluids which is independent of heat flux quantification. The approach is to assess the advective temperature bias introduced by a sample fluid vs. a reference fluid, flowing in parallel symmetric microchannels under similar heat transfer conditions.…”

“…The measurement accuracy relies on the minimization of uncontrolled modes of heat gain ( e.g. , Joule heating from sensors) 21 or heat loss ( e.g. , through the sample container or sensor wires).…”

“…20,44 Despite the potential for high throughput calorimetry, the challenge of thermal management at small scales has limited the field. 21,22…”