Abstract
Boiling and condensation is the most widely used heat transfer form and is used in various industrial equipment such as boilers of thermal power plants and heat pipes. Liquid industrial plant piping including boiler causes intense blowout in the pipe immediately after saturated boiling due to difference in tube diameter. Due to this phenomenon, there is a possibility that the liquid splashes out of the equipment and the equipment is damaged by water hammer Phenomenon. In our laboratory, we introduced a working fluid into a device composed of a boiling vessel and a glass tube simulating industrial piping and heat it directly. Then, we investigated the jetting condition and jetting cycle of working fluid experimentally. In addition, we changed the input power and the initial water level and conducted the experiment. We focused on the pressure fluctuation during subcooled boiling during the eruption. First, the temperature rise per second was investigated for each experimental condition. It was found that it increases as the input power and the sub plenum temperature increase. Next, the difference between the maximum value and the average value of the pressure ΔP∗max was obtained. It was compared with the temperature rise per second. As a result, it was found that ΔP∗max increased with increasing temperature rise per second.
