Wind loads on residential and large-scale solar collector models

Chung, Kung Ming; Chang, Keh‐Chin; Chou, Chin Cheng

doi:10.1016/j.jweia.2010.10.008

Cited by 35 publications

(15 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A symmetric pressure distribution, with reference to the centerline of the inclined solar collector, is observed. Chung et al [5] found that the separation region on the upper surface of an inclined solar collector appears near the front edge and that there are vortices near the side edges, which results in a relatively larger negative mean surface pressure coefficient. After the pressure coefficient decreases gradually toward downstream from the leading edge, a minimum of 1.0 at / = 0.15 is observed.…”

Section: Mean Pressure Distributionsmentioning

confidence: 99%

“…Reynolds number independence was also noted. For a large-scale SWH (inclined solar collector or flat plate only), Chung et al [5,6] indicated that there is a higher suction force on the lower surface over the first half of the inclined solar collector and a stronger positive mean longitudinal differential pressure coefficient is observed. Kopp et al [7] further pointed that the presence of the building changed the aerodynamic loads substantially compared to ground-mounted systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wind Loads of Solar Water Heaters: Wind Incidence Effect

Chou

Chung

Chang

2014

Journal of Aerodynamics

Self Cite

View full text Add to dashboard Cite

For applications of solar thermal energy, solar water heaters (SWHs) are becoming common. In this study, the effect of a crosswind on the aerodynamic characteristics of residential (an inclined flat plate with a horizontal cylinder) and large-scale SWHs (an inclined flat plate only) is experimentally investigated. The tests are conducted in a low speed wind tunnel and the relative wind direction with respect to the test model, , ranges from 0 to 135 deg. Measurements of the mean and fluctuating pressures are presented. These results demonstrate that higher suction and fluctuating pressure are observed near the upwind corner, particularly for the test case of = 30 deg.

show abstract

Section: Mean Pressure Distributionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wind Loads of Solar Water Heaters: Wind Incidence Effect

Chou

Chung

Chang

2014

Journal of Aerodynamics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The flat-plate solar collectors with glass covers are widely used in Taiwan. Chung et al [29,30] reported that the localized loads of a glazed flat-plate solar collector were higher near the front edge. The wind uplift of a solar collector considerably increased with the tilt angle (β) of the collector for both residential (a tilt solar collector with a horizontal cylinder as water storage tank) and large-scale (tilt solar collectors only) SWHs (Figure 8).…”

Section: Wind Loadsmentioning

confidence: 99%

Sustainable Development for Solar Heating Systems in Taiwan

2015

Self Cite

View full text Add to dashboard Cite

Abstract:In response to the impact of the United Nations Framework Convention on Climate Change, developing and using renewable energy sources and technologies have become vital for managing energy supply and demand in Taiwan. The long-term subsidy programs (1986-1991, 2000-present) for solar water heaters (SWHs) launched by the Taiwanese government constitute the main driving force for market expansion. By the end of 2013, the cumulative area of installed solar collectors was 2.27 million m 2 . Approximately 0.3 million systems (or 1.545 million m 2 ) are in operation. This corresponds to an annual collector yield of 0.92 TWh, which is equivalent to savings of 98.7 thousand tons of oil and 319 thousand tons of CO2,eq. The market-driven mechanism is associated with cost-to-benefit ratios, construction businesses, types of building architecture, degree of urbanization and household composition. The strong wind load of typhoons is another major concern. For sustaining the solar thermal industry in Taiwan, the dominant factor for disseminating SWHs in metropolitan areas involves developing building-integrated solar thermal systems. Alternative financial incentives are required for industrial heating processes in the commercial sector.

show abstract

“…Solar water heaters or photovoltaic systems, which are typically installed on the roofs of low-rise buildings, have been employed worldwide . Wind loads on inclined flat plates (or solar panels) have been reported (Wood et al, 2011;Kopp et al, 2002;Chung et al, 2008Chung et al, , 2011Chung et al, , 2013aChung et al, , 2013b. In particular, shifting reattachment points were observed on the upper surface at different tilt angles, imposing a considerable challenge on any correction scheme.…”

Section: Introductionmentioning

confidence: 99%

Effect of High Blockage Ratios on Surface Pressures of an Inclined Flat Plate

Chung¹,

Chen²

2016

JEA

Self Cite

View full text Add to dashboard Cite

The walls of the wind tunnel test section affect severely the flow characteristics around bluff bodies. In this study, the blockage effect was experimentally investigated in two lowspeed wind tunnels (23.029.7 m/s). An inclined flat plate, representing blockage ratio of 2.11%17.64%, was installed on the wind tunnel floor. The mean surface pressures on the upper and lower surfaces in a smooth flow were measured. Compared with the data in the lowblockage tunnel, the effect of the magnitude of blockage ratio on the separated flow over the inclined flat plate was more sustainable. A procedure developed from the dynamic pressure increment around the model was employed. It is observed that the effect of blockage ratio on sectional lift and drag coefficients on the centerline of an inclined flat plate can be corrected through the application of a conventional blockage formula.

show abstract

Wind loads on residential and large-scale solar collector models

Cited by 35 publications

References 12 publications

Wind Loads of Solar Water Heaters: Wind Incidence Effect

Wind Loads of Solar Water Heaters: Wind Incidence Effect

Sustainable Development for Solar Heating Systems in Taiwan

Effect of High Blockage Ratios on Surface Pressures of an Inclined Flat Plate

Contact Info

Product

Resources

About