The thermosyphon was designed using a resitance network calculation. The working fluids identified were air, water, n-triacontane-water emulsion (PCM aqueous emulsion) and FC-72 (fluorinert). Thermocouples were attached in the fabrication stage at the locations shown in the following figure.
Each fluid was tested for various power levels, starting from a low of 5W till the temperature of the heater reached ~95 degC. The experimental parameters are shown in the following table.
The thermocouples were hooked on to a National Instruments data acquisition system. The data acquisition system was ice calibrated to give an accuracy of about 0.1 deg C. The data acquisition system was interfaced with a PC which stores the data.
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