Our Energy Storage Solutions
Discover our range of innovative energy storage products designed to meet diverse needs and applications.
- All
- Energy Cabinet
- Communication site
- Outdoor site
The effect of the wind conditions on the thermal performance of …
The paper presents a theoretical analysis performed for unglazed liquid solar thermal collectors (USTCs) to demonstrate the magnitude of the thermal …
Influence of Ambient Temperature, Wind Speed, Emissivity
This article presents the results of computational experiments aimed at determining the influence of the ambient temperature ( $${{t}_{a}}$$ ), wind speed (v), …
Effect of dust on the transparent cover of solar collectors
Here, we provide the groundwork for discussing the influence of dust on the transmittance of 3 mm thick glass used commonly in solar collectors. 100 mm × 100 mm size samples of glass were cut and installed over a wooden frame in eight different orientations (north, northeast, east, southeast, south, southwest, west and northwest) …
Wind loading on tracking and field-mounted solar collectors
Tn developl.ne sn1.a~ coliectors, wind loading is the major structural design consideration. Wind loading investigations have focused on,establishing safe limits for steady state loading and verifying rational, but initial and conservative, design approaches for the various solar collector concepts. As such, the effort has been very success- ful, and has contributed …
Experimental evaluation of a stationary parabolic trough solar ...
For a collector operating under constant conditions (solar radiation, wind speed, temperature, among others), the F R and U L factors are practically constant (Kalogirou, 2014). The experiments performed to determine the thermal efficiency (η t ) of the PTC were performed for the maximum optical response condition, i.e. when the …
PERFORMANCE OF SOLAR COLLECTORS UNDER LOW …
take into account the solar irradiance, the air convection effect and the temperature dependence of the heat loss. As a result, solar heat gains and wind speed have the most important influence on the collector''s output power while other parameters such as relative air humidity or long-wave radiation bear no significant impact. 0 0.2 0.4 0.6 ...
Temperature Dependent Photovoltaic (PV) Efficiency and Its …
Solar Energy 2007;81:1132-43. [34] Tonui JK, Tripanagnostopoulos Y. Improved PV/T solar collectors with heat extraction by forced or natural air circulation. Renewable Energy 2007a;32:623-37. [35] Tonui JK, Tripanagnostopoulos Y. Air-cooled PV/T solar collectors with low cost performance improvements. Solar Energy 2007b;81:498-511. [36]
Wind effects on the performance of solar collectors on roofs
The main objective of this paper is to address the thermal performance-related effects of wind on solar collectors placed on the roofs of buildings. It is typical in the analysis of …
WIND SPEED EFFECTS IN SOLAR COLLECTOR TESTING
768 Session 2.4. WIND SPEED EFFECTS IN SOLAR COLLECTOR TESTING Ashley A. Green Departamento de Energias RenovâVeis L.N.E.T.I., Estrada do Paco do Lumiarr 22 1699 LISBOA Codex Portugal ABSTRACT Empirical efficiency data obtained for flat plate solar collectors exposed to artificial winds of various speeds in …
Measurement of wind speed distributions across a solar collector
Semantic Scholar extracted view of "Measurement of wind speed distributions across a solar collector" by M. Oliphant. Semantic Scholar extracted view of "Measurement of wind speed distributions across a solar collector" by M. Oliphant. ... The influence of wind and module tilt on the operating temperature of single-axis trackers.
Experimental research on the convective heat transfer coefficient …
Furthermore, we measured the convective heat transfer characteristics of the PV panel surface under dust accumulation conditions. In the experiment, the control wind speed is constant as w = 1.5 m/s.The wind speed does not reach the starting wind speed of the sand particles, so the sand& dust cannot be blown up [71], so it is …
Wind forces on structures supporting solar collectors
The experiments performed in the Boundary Layer Wind Tunnel Laboratory of the Civil Engineering Department in Iassy started in 1983 and focused on parallel rows of plate solar collectors standing on building flat roofs.The first results and the expe- rimental conditions were already presented (ref.5).Shelter effects,due to the supporting ...
Numerical simulation of wind flow around a parabolic trough solar collector
The predominant trend in PTC design is toward larger troughs (e.g., trough apertures have increased from 2.5 meters in the 1980s to 7.5 meters in the 2010s [11,12]), which significantly increases ...
A concise review on performance improvement of solar stills
The speed of wind flowing over the glass plate also has a significant effect on the performance of solar still. As the wind speed increases, convective heat transfer from the top of the glass surface reduces its temperature. ... water depth. Rajamanickam and Ragupathy investigated the influence of water depth on solar stills …
Thermal characteristics of a flat plate solar collector: Influence of ...
The experimental system considered for the present study is composed of a flat plate solar collector with an inclination angle of 28° and is integrated to a drying chamber, as shown in Fig. 1 (a). The solar collector has the dimensions of 110 cm length and 55 cm in width having a surface area of 0.605 m 2.The solar collector consisted of …
25 Years of Science in the Solar Wind
The solar wind experiment uses a Faraday cup — a charge-collecting plate — to measure the speed, density, and temperature of hydrogen and helium in the solar wind. While studying the solar wind over 10 years with over 2.5 million measurements, scientists noticed the solar wind never traveled slower than 161 miles …
Study of the Project Parameters Influence in the Performance of Solar …
In this figure, one can observe that the instantaneous efficiency decreases in the order of 7.80 % on the increase in wind speed from 0.0 to 8.5 m/s. The influence of wind speed on the useful energy presents the same behavior, which represents a …
Flat-plate solar collector thermal performance assessment via …
The productivity of solar thermal collectors is largely influence by internal irreversibility that occur within the collector. Minimizing the useful energy wasted in solar collectors would provide the most efficient utilization of the available energy. ... β is the flat plate collector inclination angle and V is the wind speed blowing over the ...
Wind energy potential assessment based on wind speed, its …
where v is wind speed, η is the scale parameter (m/s), η > 0, β represents the shape parameter, β > 0, and γ is the position parameter, γ ≤ 0.When γ = 0, three-parameter Weibull ...
The Impact of Climatic Conditions on PV/PVT Outcomes
The influence of wind forces on photovoltaic cells varies according to the location ... The researchers used wind speed data with solar cell temperature data as models for weather forecasting instead of practical measurements of spot wind speed. ... A. Radu, E. Axinte, Wind forces on structures supporting solar collectors. J. Wind Eng. …
Soiling effect in solar energy conversion systems: A review
This topic was first studied in non-concentrating solar heating and cooling (SHC) systems, specifically solar thermal collectors, in the 1940''s, since it was the primary commercial solar technology. Hottel and Woertz reported a 4.7% performance reduction of solar-thermal collectors located in Boston in 1942 [3].
Wind heat transfer coefficient in solar collectors in outdoor ...
The estimated wind heat transfer coefficient has been correlated against wind speed by linear regression and power regression. ... from the upper outermost surface of a solar collector. This wind induced convective heat transfer has greater influence on upward heat losses in case of single glazed collectors than double-glazed collectors …
Computational prediction of dust deposition on solar panels
This research is concerned with performing computational fluid dynamics (CFD) simulations to investigate the air flow and dust deposition behavior around a ground-mounted solar PV panel. The discrete phase model (DPM) is adopted to model the gas-solid flow. The influence of the wind speed, the dust particle size, and the dust material …
Wind speed effect on the flow field and heat transfer around a ...
In order to analyse the influence of the wind speed in the heat transfer of the HCE, the numerical model has first been used on a circular cylinder in cross-flow. ... 2012), wind speed (Hachicha, Rodríguez, & Oliva, 2014) and other uncertain meteorological parameters. Solar collectors and auxiliary heater need to be jointly …
Measurement of wind speed distributions across a solar collector
Wind direction from the North-West. Free mean wind speed -~ 5.3 ms-1. Technical Note 405 Z--/i Fig. 4. Wind speed contours across the solar collector plates. Wind direction from the West. J''I J S 2.5__ms''l t.3 ms"~ I / f f Fig, 5. Wind speed contours across the solar collector plates. Wind direction from the South. Free mean wind …
Impact of dust on solar photovoltaic (PV) performance: Research status ...
Most studies had overlooked the influence of prevalent wind movements (speed and direction) and the solar-collector orientation characteristics on their impact on dust accumulation. Both factors critically determine the extent of dust accumulation at any site. ... Goossens et al. [15] studied the influence of wind velocity and orientation ...
On the influence of wind on cavity receivers for solar power …
A correlation between the heat losses, due to the wind, and the wind speed was experimentally estimated in form of the Q ̇ loss, wind = 59.545 × V wind + 76.724. The correlation was obtained for the investigated hemispherical cavity receiver with R 2 = 0.9477 for the side wall direction of the wind.
Performance analysis and comparison of glazed and unglazed …
The effect of five parameters (wind speed, mass flow rate of air, absorber tube diameter, length of glass tube and ambient temperature) is investigated by …
Effects of the Solar Wind
The wind speed of a devastating Category 5 hurricane can top over 150 miles per hour (241km/hour.) Now imagine another kind of wind with an average speed of 0.87 million miles per hour (1.4 million km/hour.) Welcome to the wind that begins in our Sun and doesn''t stop until after it reaches the edge of the heliosphere: the solar wind.
PERFORMANCE OF SOLAR COLLECTORS UNDER LOW …
As a result, solar heat gains and wind speed have the most important influence on the collector''s output power while other parameters such as relative air humidity or long …
Effect Of Roof Profiles On Wind Heat Loss Coefficient For Roof …
A correlation for convective coefficient due to wind speed on a flat surface is given in McAdam, 1954. Suresh and Mullick, 2010 developed a linear equation for wind heat transfer over solar collectors with a flat surface.
Measurement of wind speed distributions across a solar collector
We measure the module temperature $T_{m}$ in 1P and 2P single-axis trackers, analyzing how $T_{m}$ depends on wind speed and direction, as well as on irradiance, ambient …
Data Article Measurement data from real operation of a hybrid ...
Refining the influence of wind, infrared and solar resource, depending on the available measurement information could be interesting. 1. ... To measure the wind speed and direction in the collector plane, yellow boards have been installed around the collector to extend the plane. This homogenises the convection fluxes around the …
Effect Of Roof Profiles On Wind Heat Loss Coefficient …
A correlation for convective coefficient due to wind speed on a flat surface is given in McAdam, 1954. Suresh and Mullick, 2010 developed a linear equation for wind heat transfer over solar collectors with a flat surface.
Solar and wind induced external coefficients
An examination is conducted of the wind coefficient commonly adopted for evaluations of the external heat transfer from the cover glasses of solar collectors subjected to a range of windspeeds.
Wind speed effect on the flow field and heat transfer around a ...
The effects of wind speed and pitch angle on the averaged and instantaneous flow are assessed. The aerodynamic coefficients are calculated around …
Performance analysis and comparison of glazed and unglazed solar …
4.1 Comparison of GGTSAC and UGGTSAC on the basis of wind speed. Figures 7 and 8 present the influence of wind speed on the outlet air temperature difference and thermal efficiency of GGTSAC and UGGTSAC by keeping all other parameters constant. Outlet air temperature difference of GGTSAC and UGGTSAC was …
Employing a fan to improve the wintery heating performance of solar …
The fan enhanced the outlet wind speed obviously and the outlet wind speed was increased from 0.8 m/s-1.55 m/s to 2.15 m/s-2.3 m/s, which make the collector maintain a stable working condition. (2) The fan facilitated easier heat output from SAC-PCM, resulting in an average increase of 4.18 °C in the outlet air temperature throughout …
Experimental study on the influence of wind-sand two-phase …
Due to the different sand carrying capacities, there are significant differences in the wind-sand two-phase flow at different heights, resulting in different erosion effects impacts on the output power of photovoltaic modules.At 10m/s wind speed, the relative loss rate of PV modules with tilt angle of 15 ° reaches 5.84 %.
Influence of Ambient Temperature, Wind Speed, Emissivity, …
APPLIED SOLAR ENERGY Vol. 55 No. 1 2019 INFLUENCE OF AMBIENT TEMPERATURE, WIND SPEED, EMISSIVITY31 (i.e., ) depends on the tilt (α) and thickness ( ) of the considered DAS and also