Numerical analysis of mechanical ventilation solar air collector with internal baffles

Hu, Jianjun; Sun, Xiaofeng; Xu, Jinliang; Li, Zhixian

doi:10.1016/j.enbuild.2013.03.015

Cited by 60 publications

(16 citation statements)

References 19 publications

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“…However, similar to any other optimization method, the CFD approach has several limitations and challenges -in particular the selection of the proper turbulence model (A. S. Yadav, 2013). Hu et al [97] used CFD software for the simulation and analysis of a solar air collector with internal baffles. The number of baffles, the thickness of the air gap, the number of glass covers, and environmental conditions were used as independent variables for this study.…”

Section: Solar Energymentioning

confidence: 99%

“…However, air trapping in some regions results in a temperature rise and an increase of heat loss. In this specific case, the optimum solution was to have three internal baffles and an air flow rate in the range of 20 -40 m 3 /(m 2 h) [97]. In a study by Yadav et al [100] twodimensional CFD model was used to investigate the thermal and hydraulic performance of a solar-air-heater with differently configured absorber plate.…”

Section: Solar Energymentioning

confidence: 99%

See 1 more Smart Citation

Solutions for Energy Efficient and Sustainable Heating of Ventilation Air: A Review

Žandeckis¹,

Kļaviņa²,

Dzikēvičs³

et al. 2015

JESTR

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A high energy efficiency and sustainability standards defined by modern society and legislation requires solutions in the form of complex integrated systems. The scope of this work is to provide a review on technologies and methods for the heating of ventilation air as a key aspect for high energy and environmental performance of buildings located in a cold climate. The results of this work are more relevant in the buildings where space heating consumes a significant part of the energy balance of a building, and air exchange is arranged in an organized manner. A proper design and control strategy, heat recovery, the use of renewable energy sources, and waste heat are the main aspects which must be considered for efficient and sustainable ventilation. This work focuses on these aspects. Air conditioning is not in the scope of this study.

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Section: Solar Energymentioning

confidence: 99%

Section: Solar Energymentioning

confidence: 99%

Solutions for Energy Efficient and Sustainable Heating of Ventilation Air: A Review

Žandeckis¹,

Kļaviņa²,

Dzikēvičs³

et al. 2015

JESTR

View full text Add to dashboard Cite

show abstract

“…Because of lower thermal efficiencies of general flat plate SACs, research has been done to improve thermal performances of SACs. In order to enhance the convective heat transfer between the flowing air and the absorber plate, various types of absorber plates are used in the studies, such as roughness elements [1], crosscorrugated plates [2,3], v-groove absorber plate [4], or using fins attached over and under the absorber plate to provide extended surfaces [5,6]. Besides, double pass is another way to enhance air-side heat transfer of SACs, by inserting the absorber plate into the air conduit to divide it into two channels so as to extend heat transfer area [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of a Single-pass Flat Plate Solar air Collector with Severe Dust Deposition on the Transparent Glass Cover

Yang

Wang

2015

Energy Procedia

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The present study analyzes the thermal performance of a single-pass flat plate solar air collector (SAC) in the case of severe dust deposition surface. Experiments of the SAC with both severe dust deposition surface and clean cover surface are conducted using the steady-state test (SST) method, in order to show a contrast. The mathematical relation between the combined standard uncertainty of the predicted thermal efficiency and the uncertainties of the experimental results is presented. And the collector characteristic parameters, such as the collector heat removal factor, the collector flow efficiency factor, the total heat loss coefficients, etc. are obtained. The results show that, the predicted thermal efficiency in the case of severe dust deposition surface is decreased by 10.7% -21.0% when the normalized temperature difference ranges from 0 to 0.04. And the optical efficiency of the SAC with severe dust deposition surface is decreased by 8.39% in contrast with the case of clean cover surface.

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“…CFD modelling techniques were used to assess the effects of inclination angle, double glazing, and low-emissivity finishes on the induced ventilation rate [19]. Hu et al [20] investigated a simple-structure mechanical ventilation solar air collector (MV-SAC) with internal baffles. A numerical model was developed in the present study to predict solar air collector internal flow and heat transfer characteristics.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Application of a Solar Storage Wall Combined with the Low-Temperature Organic Rankine Cycle

Hung

Lee

Lin³

2014

International Journal of Photoenergy

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The objective of this study is to collect energy on the waste heat from air produced by solar ventilation systems. This heat used for electricity generation by an organic Rankine cycle (ORC) system was implemented. The advantages of this method include the use of existing building’s wall, and it also provides the region of energy scarcity for reference. This is also an innovative method, and the results will contribute to the efforts made toward improving the design of solar ventilation in the field of solar thermal engineering. In addition, ORC system would help generate electricity and build a low-carbon building. This study considered several critical parameters such as length of the airflow channel, intensity of solar radiation, pattern of the absorber plate, stagnant air layer, and operating conditions. The simulation results show that the highest outlet temperature and heat collecting efficiency of solar ventilation system are about 120°C and 60%, respectively. The measured ORC efficiency of the system was 6.2%. The proposed method is feasible for the waste heat from air produced by ventilation systems.

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Numerical analysis of mechanical ventilation solar air collector with internal baffles

Cited by 60 publications

References 19 publications

Solutions for Energy Efficient and Sustainable Heating of Ventilation Air: A Review

Solutions for Energy Efficient and Sustainable Heating of Ventilation Air: A Review

Experimental Study of a Single-pass Flat Plate Solar air Collector with Severe Dust Deposition on the Transparent Glass Cover

An Innovative Application of a Solar Storage Wall Combined with the Low-Temperature Organic Rankine Cycle

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