상변화물질PCM을 이용한 소방배관의 동파방지에 관한 연구

Abstract

Freeze accidents are frequently occurring due to low outside temperatures in winter. In particular, if the fire piping is frozen, it is exposed to the risk of fire during the maintenance period. Various methods are used to solve this problem, but there is a risk of fire or installation costs are expensive. Therefore, in this study, PCM is used to prevent freezing or to reduce power consumption of heating wires. First, a numerical analysis model was created by using a finite difference method in the Matlab program. After that, the numerical analysis model was verified by comparing it with the actual measurement experiment results. Through numerical analysis simulation, it was confirmed that when PCM was used, the freezing time was delayed and freeze was prevented compared to general insulation fire piping. In the case of fire piping with heating wires, it was confirmed that the use of PCM reduced the operation rate of heating wires, thereby reducing power consumption. Finally, in this study, information on whether PCM selection and heating wire installation are necessary is required for proper design of fire piping. Therefore, a regression equation was proposed to predict the freezing time through linear regression analysis of freezing time data according to various regions, latent heat, melting point, and PCM volume.