Seminar

1- Phase Change Process in a Zigzag Plate Latent Heat Storage System during Melting and Solidification. (Published Paper)

Abstract: Applying a well-performing heat exchanger is an efficient way to fortify the relatively low thermal response of phase-change materials (PCMs), which have broad application prospects in the fields of thermal management and energy storage. In this study, an improved PCM melting and solidification in corrugated (zigzag) plate heat exchanger are numerically examined compared with smooth (flat) plate heat exchanger in both horizontal and vertical positions. The effects of the channel width (0.5 W, W, and 2 W) and the airflow temperature (318 K, 323 K, and 328 K) are exclusively studied and reported. The results reveal the much better performance of the horizontal corrugated configuration compared with the smooth channel during both melting and solidification modes.

2- Thermal behaviour of the flow boiling of a complex nanofluid in a rectangular channel: An experimental and numerical study. (Published Paper)

Abstract: The evaluation of the nanofluid flow boiling heat performance for VARs was stated experimentally and numerically in a rectangular tube. The nanofluid is composed of a salt solution (acetone‑zinc bromide) with graphene nanoparticles in suspension operating sub-level waste heat. Computational fluid dynamic (CFD) simulations were achieved to evaluate a numerical demonstration under the effects of different nanoparticle loadings and boiler temperature, which represent the experimental cases under the same boundary conditions. The experimental data showed that the base-fluid density affects the stability of the solution.

3- Effect of airflow channel arrangement on the discharge of a composite metal foam-phase change material heat exchanger. (Published Paper)

Abstract: The effect of various arrangements of airflow channel in a proposed storage heater based on copper foam soaked in a phase change material (PCM) is investigated. Different configurations of the air channel using a serpentine channel, as well as numbers of the air channels, are examined in a representative three-dimensional computer-based model (Ansys Fluent). Evaluation is performed by PCM discharging rate and output air temperature of the unit. The goal is to improve both uniformity and value of air temperature. Changing the airflow arrangement using serpentine configuration to increase heat exchange surface area reduces solidification time and increases output maximum air temperature as well as pressure drop; conversely, exit air achieves lower temperature uniformity.