THERMOELECTRIC TOTAL ENTHALPY FLOW CALORIMETER.
Conference Paper
Overview
Overview
abstract
A flow calorimeter for measuring the total enthalpy of fluids over a wide temperature and pressure range is described. Energy is removed from the calorimeter at a constant rate by a current-regulated thermoelectric cooling device. Prior to introducing a flowing fluid, the energy removed is matched by the addition of electrical energy so as to maintain the temperature of the calorimeter constant. Test measurements with water, toluene, and two chloro-fluoromethanes were made from 230 and 473 K at pressures up to 12 MPa. The results were within plus or minus 0. 5% of literature values, the main source of error being the flow rate of the high pressure pump.