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- Title
Absorber Type Optimization for Night-Shift Operation of Solar Air Heater.
- Authors
Rasul, Hardi A. M.; Hamakhan, Idress A.; Ibrahim, Ali M.
- Abstract
In the current study, the effect of using heat storage materials aimed at the night shift operation was studied by simulation tools. The Finite Volume Method (FVM) is used as a method to discretize the governing equations in the 2-D domain, and the RNG K- turbulence model is applied for simulation. The effect of absorption type based on five different materials such as Aluminum, Water, Asphalt, Graphite, and Sand on the performance of solar air heaters (SAH) is carried out thermally. The results show that the optimum material to obtain the maximum difference in temperature (38.32 K) between the absorber and the surrounding occurs once the asphalt is used, while the sand is the worst case, which is (31.71 K). Following, the focus is on the best absorber for night time operation. The Lumped Parameter Analysis is applied to the time required to dissipate the heat energy from the storage layer to reduce it to the assumed final temperature of a 5-degree difference (higher) than the ambient. After solving the transient equation, it is found that water can operate the system for a longer period (4.31 hrs.) as well as Graphite can operate the system for a shorter period (0.46 hrs.). Then ten different velocities in the entry section are used to consider the influences on the system performance. The results show that the velocity has a significant effect on the outlet temperature and operation period for night time.
- Subjects
SOLAR air heaters; FINITE volume method; HEAT storage; ENERGY storage; NIGHT work
- Publication
Journal of Engineering Research (2307-1877), 2021, Vol 9, p1
- ISSN
2307-1877
- Publication type
Article
- DOI
10.36909/jer.v9iICRIE.11673