The data for the first three CFP tests came from a four day test in which the two tanks and thermosyphon were left outside and their temperatures were recorded. These tests show how the thermosyphon enhances the heat transfer from the water tank to the surroundings.
The fourth and fifth tests were performed to determine the amount of unwanted heat that is being transfered into the water from the surroundings through the thermosyphon. These tests show that the thermosyphon conducts 0.1 W/K into the tank compared to 1.22 W/K out of the tank.
A week long test was performed to measure the amount of ice buildup on the thermosyphon during cold weather. Another purpose of this test was to observe the effect of ice buildup on the overall heat transfer rate of the system.