A provision crane is installed on the stern deck of the ship to load or unload ship supplies. In this study, a ventilation hole capable of circulating internal flow was installed to reduce dew condensation by reducing the temperature difference between the inside and outside of the cylindrical column supporting the provision crane installed at the stern of the training ship. In order to reduce the temperature difference between the inside and the outside, an anti-sweat covering work was carried out by adding insulation material. By reducing dew condensation, we aim to improve the insulation of the electric motor installed inside the cylindrical column and improve the usability of the provision crane

In this study, two ventilation holes were considered to prevent condensation in the circular column supporting the provision crane on a training ship(Saenuri) for Mokpo National Maritime University. The ventilation holes could be understood as the most simple and inexpensive way to prevent condensation because it was formed only by drilling. If sufficient ventilation is provided, the insulation and corrosion of an electric motor can be improved, and a comfortable state can be ensured in the circular column. The circular column had an electric motor for driving the provision crane so that the basic principle was to utilize the kinetic energy for the flow field from a cooling fan in the circular column. The ventilation holes attenuated the low-velocity area in the circular column and contributed to internal flow circulation with updrafts. The results were discussed through numerical analysis based on computational fluid dynamics.