Abstract
The existence of transient phenomena in the nucleate boiling is one of the important problems for the utilization of nucleate boiling heat transfer, because the transient points (i.e. incipient boiling point and burn out point) spread through a wide region aimlessly. In order to investigate the transient phenomena from the statistical viewpoint experimentally, an automatic experimental system for saturated pool boiling on an electrically heated wire has been developed. This system is based on a distributed multi-processer system. A master mode computer administers repetition of the experiments, obtains and calculates the data of temperature and the heat flux of the test wire. A slave mode computer controls electric current to the test wire at various operating conditions. By this system, the experiments can be repeated with high reproducibility. A number of boiling curves and the distributions of the transient points can be obtained. In this paper, the detail presentation of this experimental system is informed. The errors in the obtained data and the reproducibility of repetition in current control system are discussed. To check this system, the boiling experiment in low heat flux region has been repeated 500 runs in the case of Pt-wire immersed in n-Pentane, and those results are also enclosed.
