Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 12, 2016 - November 13, 2016
Natural circulation of supercritical and liquid two-phase CO2 was investigated. The experimental solar water heater is installed at 30 ° and 90 ° of tilt angle. In the present study basic characteristic of energy transfer are focused on thermo-fluid behavior due to gravity force in two conditions of collector tilt angle (30 ° and 90 °). From the experimental results, it is found that the mass flow rate of CO2 is increased, when the collector tilt angle is at 30 °, because of a large difference in density and the collector head. In addition heat transfer characteristics were increased with the increase of the Reynolds number and the Prandtl number.
