DOI: 10.36347/sjet.2018.v06i08.001

Pages: 246-249

The transient heat transfer of a thermo-flask container is presented using the lumped capacitance method with the assumption that there is no temperature gradient between the container’s wall and the fluid. The thermos-flask is considered partially filled. The fluid in the flask is reduced due to venting of the fluid. The mass of the vented fluid can be evaluated by considering the heat transfer from the container to the surrounding. It is found that the partially filled thermos-flask influenced the transient temperature characteristics of the thermo-flask.