Comprehensive analysis of the performance of the coaxial heat exchanger with turbulators

Turgut, Emre; Yardımcı, Uğurcan

doi:10.1016/j.ijthermalsci.2022.107502

Cited by 16 publications

(2 citation statements)

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“…Energy consumption has become highly dependent on fossil fuels since the industrial revolution. The need for renewable energy sources is ever increasing due to the rapid increase in the world's population and air pollution and the limited availability and depletion of existing fossil fuels 1–3 . Solar energy is a free and clean renewable energy source that can be used as an alternative to fossil fuels for space heating, electricity generation, desalination, and air conditioning applications 4–6 .…”

Section: Introductionmentioning

confidence: 99%

“…lution and the limited availability and depletion of existing fossil fuels. [1][2][3] Solar energy is a free and clean renewable energy source that can be used as an alternative to fossil fuels for space heating, electricity generation, desalination, and air conditioning applications. [4][5][6] This energy can be converted into thermal energy via solar collectors.…”

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confidence: 99%

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Numerical investigation of the effect of using louver baffles on thermal performance in solar air collectors

Tuğan

Işik

2023

Env Prog and Sustain Energy

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Conventional flat plate solar air collectors have advantages such as low cost and simple design. However, their thermal efficiency is lower than that of other designs. The thermal efficiency of these collectors can be increased by detailed examination of parameters such as the shape, size, arrangement and material of the air duct. In this study, it is aimed to improve the thermal efficiency of solar air collectors. The effect of louver baffles, which were not previously used in solar air collectors, on thermal efficiency was investigated numerically via computational fluid dynamics. Three different solar air collectors with flat plates, segmented baffles, and louver baffles were compared in terms of thermal efficiency. In addition, pressure drops in solar air collectors were investigated. The mass flow rate of the air in all collectors is assumed to be 0.04 kg/s. Analyzes were carried out between 09:00 and 16:00. The thermal efficiency values obtained during the day for solar air collectors with flat plate, segmented baffles and louver baffles are 27.66%–56.35%, 29.57%–58.82% and 30.09%–59.47%, respectively. The daily thermal efficiency values obtained for solar air collectors with flat plate, segmented baffles and louver baffles are 46.98%, 49.18% and 49.87%, respectively. The pressure drop for solar air collectors with flat plate, segmented baffles and louver baffles were found to be 4.62, 18.82 and 5.96 Pa, respectively. Based on the data obtained from this study, louver baffles are recommended for use in solar heating applications due to their high thermal efficiency and low pressure drop.

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Section: Introductionmentioning

confidence: 99%