Heat transfer performance and flow characteristics of solar air heaters with inclined trapezoidal vortex generators

Xiao, Hui; Dong, Zhimin; Liu, Zhichun; Liu, Wei

doi:10.1016/j.applthermaleng.2020.115484

Cited by 55 publications

(4 citation statements)

References 42 publications

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“…Xiao et al [9] investigated flow parameters and heat transmission performance in SAHs configured with Inclined Trapezoidal Vortex Generators (ITVGs). The findings indicated a remarkable increase in energy and exergy efficiency, by 24% and 31%, respectively, compared to flat SAHs.…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation of a plane solar air heater

Nath,

Dabi,

Teyi

2023

E3S Web Conf.

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This study focuses on evaluating the thermal performance of a flat plate solar air heater (SAH) as a key component for harnessing solar thermal energy. The SAH operates by capturing solar energy and utilizing it to heat the air, making it an economically viable, environmentally friendly, and straightforward renewable energy system. MATLAB software is utilized to analyze various performance parameters, such as thermal efficiency, absorber plate area, convective heat transfer coefficient, mass flow rate, insulation thickness, side loss and bottom loss coefficients, and collector efficiency. A specific dimensional model is used for analysis. The influence of these performance parameters on the efficiency of the SAH is explored. Finally, it concludes with some final remarks and proposes work for future advancements for continued study on solar air heaters.

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Section: Introductionmentioning

confidence: 99%

A numerical investigation of a plane solar air heater

Nath,

Dabi,

Teyi

2023

E3S Web Conf.

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“…The heatexchanging parts of SAHs can be constructed with pipes or tubes (Afshari et al, 2020) but rectangular ducts or channels, as shown in Fig. 1(b), have often been used in solar -energy harvesting systems owing to the larger areas of their solar-energy absorbers Thianpong et al, 2009;Xiao et al, 2020). A conventional rectangular-duct -type heat exchanger generally consists of four walls .One of them is the solar -energy absorber, so -called absorber plate, as illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Winglet Vortex Generator Position in Rectangular-Duct-Type Solar Air Heaters

Lertnuwat¹

2022

Frontiers in Heat and Mass Transfer

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The aim of this work is to numerically investigate the effect of mounting winglet vortex generators on different positions in rectangular-duct-type air heaters. The two investigated positions were the absorber plate and the insulation plate, opposite to the absorber plate. Four shapes of winglet vortex generator, i.e. perforated rectangular winglet vortex generators (P-RWVG), rectangular winglet vortex generators (RWVG), perforated trapezoidal winglet vortex generators (P-TWVG) and trapezoidal winglet vortex generators (TWVG), were used. Results showed that heat-transfer capability would be better if the winglet vortex generators were mounted on the opposite insulation plate in the cases of P-RWVG, RWVG and P-TWVG.

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“…For example, the solar air collector can be deployed on the sun-facing façade (also named as "Trombe wall" in some cases [17]) and roof to increase the indoor air temperature on cold sunny days. 3 Typically, a solar thermal collector is equipped with a solar selective absorbing coating on the solar absorber to maximize the thermal efficiency.…”

Section: Introductionmentioning

confidence: 99%