Investigations on Boiling Heat Transfer during Flow in Mini-Channels: Error Analysis with the Use of Monte Carlo Method | Chapter 7 | Current Perspective to Physical Science Research Vol. 1

 Numerous uses for compact mini-channel heat exchangers have existed broadened in current years, particularly in applications with aspect change. The advantages of utilizing such instruments are that they allow individual to remove big heat fluxes, retaining limited dimensions of the heat exchange system and specify effectiveness of abating or thermoregulation. The authors of this phase described current research that aims to establish heat transfer predictions of flow boiling in tiny-channels. The model mini-channel heat exchanger was proposed as the test division with five parallel tiny-channels 1 mm deep, asymmetrically warmed. The working fluid was Fluorinert FC-770 that laminarly issued in the circulation loop. The hotness of the common warmed wall of the mini-channels was calculated by infrared thermography while fluid hotness at the inlet and release to the test section was regulated due to K-type thermoelements. Investigations of heat transfer had connection with the subcooled boiling domain. The main objective was to determine local heat transfer coefficients on the contact surface middle from two points the working fluid and the angry wall from the Robin bound condition. The mathematical model named by the heat equating in the mini-channel obstruction and by the Fourier-Kirchhoff equation in a gushing fluid leads to an inverse heat transfer question. This problem was answered using the FEM accompanying the Trefftz-type basis functions. As hotness measurement is critical during heat transfer research, an additional experiment was attended for the estimation of the hotness measurement changeableness. During such an experiment, hotness measurement was acted with the use of K-type thermoelements and an shade resembling such a color camera in two mini-channels together. Since the uncertainty elements are not approximately the alike magnitude, the Monte Carlo means was indicated to estimate the doubt of the surface temperature calculation. The results obtained from this simulation procedure were compared accompanying the results of the computation had connection with the uncertainty procreation method. Both plans of temperature were raise to be consistent. The estimate of the hotness uncertainty calculations included in the ending results of the heat transfer coefficient.

Author(s) Details:

Magdalena Piasecka,
Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, 25-314 Kielce, Poland.

Beata Maciejewska,
Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland.

Artur Piasecki,
Contractor of Grant No. PM/SP/0031/2021/1, Kielce, Poland.

Please see the link here: https://stm.bookpi.org/CPPSR-V1/article/view/11936