Performance assessment of a hybrid solar-wind-rain eco-roof system for buildings

Chong, Wen Tong; Wang, Xiao Hang; Wong, Kok Hoe; Mojumder, Juwel Chandra; Poh, Sin Chew; Saw, Lip Huat; Hin, Lai Sai

doi:10.1016/j.enbuild.2016.06.065

Cited by 29 publications

(12 citation statements)

References 31 publications

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“…The inclination angles of the VRGV and the gable roof is 19.5 • and 15 • , respectively. A value of 19.5 • is the optimum tilt angle for the VRGV to augment the wind speed as wind passes through the wind turbine between two-layers of the roof structure [47]. Furthermore, 15 • is the optimum roof inclination angle for solar PV panels obtaining the most solar radiation in Malaysia [45].…”

Section: Prototype Fabricationmentioning

confidence: 99%

“…Table 5 shows the monthly solar radiation from 2012 to 2014 in Subang city. 69.4% Influential factor of surface inclination and direction on power output, ε PV [65] 0.95 Energy conversion efficiency, η ps [65] 15% Influential factor of surface inclination and direction on performance ratio, PR [65,66] 71.8% Module size 1956 × 992 × 50 mm Area of solar PV cells [47] 1.94 m 2 Estimated percentage of cell active area [65] 75% Cell active area of a module, A cells 1.455 m 2 Number of solar PV panels [47] 108 Total active area of solar PV panels, A s 157.14 m 2 Annual cash flow of solar photovoltaic power generation is given as:…”

Section: Cost-effectiveness Of Solar Photovoltaic Systemmentioning

confidence: 99%

“…Annual power generation of the solar photovoltaic system installed on the two layers of roof structures (VRGV and double slope gable roof), G solar (kWh/year) * [47,65,66] 20,432.52…”

Section: Item Valuementioning

confidence: 99%

“…PV panels [47] $27,000.00 VRGV [39] $2500.00 Inverter * per unit $900.00 Hybrid controller * per unit $250.00 Estimated initial installation [47] $1500.00 Estimated initial cost $32,150.00 PV operation and maintenance cost per day [68][69][70] $0.056 PV operation and maintenance cost per kWh [69,71] $0.001 * Inverter and hybrid controller are replaced every five years.…”

Section: Item Valuementioning

confidence: 99%

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Preliminary Performance Tests and Simulation of a V-Shape Roof Guide Vane Mounted on an Eco-Roof System

et al. 2018

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The technical and economic features of a patented V-shape roof guide vane (VRGV) with a solar and wind power generation system mounted on an eco-roof system are presented in this paper. Moreover, this innovative VRGV was investigated on for the purpose of improving the performance of a vertical axis wind turbine (VAWT), which was installed on an eco-roof system to solve the low-efficiency power generation problem of the wind turbines under the condition of a low wind speed. This paper proposes a preliminary study for the performance of the VAWT with the VRGV on a building. This research used a mock-up building with a double slope roof, where a five straight-bladed VAWT was mounted and tested under two conditions, with and without the VRGV. From the comparative experiments, the self-starting performance and rotational speed of the VAWT mounted above a double slope roof with the VRGV have been significantly improved compared to the VAWT without the VRGV. Further, the power coefficient (Cp) of the VAWT can be augmented to about 71.2% increment due to the VRGV design. In addition, numerical simulations by computational fluid dynamics (CFD) were proposed to verify the augmented effect of the Cp of the VAWT under the influence of the VRGV in the experiment. Besides, economic estimation of the VRGV was conducted.

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Section: Prototype Fabricationmentioning

confidence: 99%

Section: Cost-effectiveness Of Solar Photovoltaic Systemmentioning

confidence: 99%

“…Annual power generation of the solar photovoltaic system installed on the two layers of roof structures (VRGV and double slope gable roof), G solar (kWh/year) * [47,65,66] 20,432.52…”

Section: Item Valuementioning

confidence: 99%

Section: Item Valuementioning

confidence: 99%

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Preliminary Performance Tests and Simulation of a V-Shape Roof Guide Vane Mounted on an Eco-Roof System

et al. 2018

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“…As a typical type of Darrieus VAWT, H-rotor Darrieus VAWT shows a rising 2 of 14 development recently. It has been installed not only in off-shore areas [9], but also on the ground or on the rooftop of buildings in remote and urban areas [10,11]. However, the aerodynamic characteristics of H-rotor Darrieus VAWT need to be further improved.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Airfoil Leading Edge Radius on the Aerodynamic Performance of H-Rotor Darrieus Vertical Axis Wind Turbine

Song

Zhu

et al. 2019

Energies

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This paper numerically investigates the effects of airfoil leading edge radius on the aerodynamic characteristics of H-rotor Darrieus vertical axis wind turbine (VAWT). 10 modified airfoils are generated by changing the leading edge radius of the base NACA 0015 airfoil from 1%c to 9%c, respectively. A 2D unsteady Computational Fluid Dynamics (CFD) model is established and validated with the previously published experimental data. The power, torque, and flow field characteristics of the rotors are analyzed. The results indicate that the maximum and minimum power coefficient at the optimum tip speed ratio (TSR) are obtained for the LE-5%c and LE-1%c model, respectively. The best aerodynamic characteristics are determined by the LE-5%c model below the optimum TSR and the LE-3%c model beyond the optimum TSR. The torque characteristics and pressure distribution for the single blades with different airfoil leading edge radius show an obvious difference in the upwind region and a very small difference in the downwind region. Moreover, the airfoil leading edge radius influences the strength, region, and diffusion rate of the vortices, being the main reason for the observed differences in instantaneous torque coefficient and power coefficient. The vortices of the LE-1%c model are stronger, larger, and diffuse slower than those of the LE-2%c and LE-5%c model at the optimum TSR.

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Study on Aerodynamic Characteristics of Darrieus Vertical Axis Wind Turbines with Different Airfoil Maximum Thicknesses Through Computational Fluid Dynamics

Song

Zhu

et al. 2019

Arab J Sci Eng

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Performance assessment of a hybrid solar-wind-rain eco-roof system for buildings

Cited by 29 publications

References 31 publications

Preliminary Performance Tests and Simulation of a V-Shape Roof Guide Vane Mounted on an Eco-Roof System

Preliminary Performance Tests and Simulation of a V-Shape Roof Guide Vane Mounted on an Eco-Roof System

Numerical Investigation on the Effects of Airfoil Leading Edge Radius on the Aerodynamic Performance of H-Rotor Darrieus Vertical Axis Wind Turbine

Study on Aerodynamic Characteristics of Darrieus Vertical Axis Wind Turbines with Different Airfoil Maximum Thicknesses Through Computational Fluid Dynamics

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