Experimental Study of Energy Loss in Solar Energy Collectors With Wind Fences

2004 ◽  
Vol 126 (4) ◽  
pp. 1101-1104 ◽  
Author(s):  
Dalmo G. Gomes ◽  
Nide G. C. R. Fico,
Keyword(s):  
Experimental Study ◽  
Solar Energy ◽  
Energy Loss ◽  
Flat Plate ◽  
Flow Pattern ◽  
Solar Collector ◽  
Initial Phase ◽  
Separated Flow ◽  
Loss Reduction ◽  
Wind Barrier

This work presents a new way of minimize the losses on a flat plate solar energy collector. A wind barrier is added along the collector perimeter in order to modify the flow pattern over it. This barrier creates a region of recirculating separated flow on top of the collector. This is an initial phase of the work and only winds aligned with the solar collector are investigated. In other words no influence of lateral winds is accounted for. The first experimental results proved very encouraging. It was observed a 12% heat-loss reduction in comparison with the traditional double glazing solution.

scholarly journals Solar Energy Absorbed Thermosyphon Flat Plate Collector Analysis Using Cu/H2O Nanofluid – An Experimental Study

2021 ◽  
pp. 100028
Author(s):  
L. Syam Sundar ◽  
V. Punnaiah ◽  
Manoj K. Singh ◽  
António M.B. Pereira ◽  
António C.M. Sousa
Keyword(s):  
Experimental Study ◽  
Solar Energy ◽  
Flat Plate ◽  
Flat Plate Collector

Effects of Aspect Ratios on Average Daily Solar Energy Collection for Different Flat-Plate Collector Arrays in Winter Months

2013 ◽  
Vol 368-370 ◽  
pp. 1228-1231
Author(s):  
Fen E Hu ◽  
Sheng Xian Wei ◽  
Neng Bang Hou
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Aspect Ratio ◽  
Flat Plate ◽  
Solar Collector ◽  
Radiation Model ◽  
Aspect Ratios ◽  
Solar Radiation Model ◽  
Flat Plate Collector

A solar radiation model to determine solar energy collection on solar collector array with different aspect ratios has been developed. The relations between the aspect ratio and the average daily solar radiation collection on the collector array have been deeply studied. The results show that there is an optimum aspect ratio to maximize the solar energy collection on the collector arrays. The optimum aspect ratios of the 1000 m2 collector array for Haikou, Kunming, Lhasa and Beijing are 10/1, 1/3, 5/1 and 10/1.The optimum aspect ratios of 1000 m2, 500 m2, 200 m2 and 100 m2 collector arrays for Kunming are 1/3, 3/1, 7/1 and 1/5, respectively.

scholarly journals Investigation of Performance of Solar Flat and Curved Plate Collectors through Numerical Simulations

2021 ◽  
Vol 40 (1) ◽  
pp. 66-74
Author(s):  
Luqman Ahmed Pirzada ◽  
Xiaoli Wu . ◽  
Qaiser Ali ◽  
Asif Khateeb .
Keyword(s):  
Solar Energy ◽  
Flat Plate ◽  
Solar Collector ◽  
Numerical Study ◽  
Hot Water ◽  
Working Fluid ◽  
Solar Panels ◽  
Modeling Tools ◽  
Design Work ◽  
Flat Plate Collector

Solar energy is radiant light as a form of thermal heat energy which can be obtained and used by means of a variety of solar apparatus. As apparatus the flat and curved plate solar collector is specifically designed for assembling solar energy as a solar water heater system. The designing potency of this collector lone can generate medium level hot water from radiant sunlight source via absorbed plates. Standard type flat and curved plates solar collector plates are mostly used in remote coldest regions of the world where hot water is consumed for commercial and domestic purposes. These types of solar collector Plates can cheaply be manufactured compared to other solar panels like solar Shingles, Polycrystalline Solar Panels, Mono-crystalline Solar Panels, and Thin Film Solar Panels. For future work, this proposed pre-design is recommended for fabrication. A numerical study was carried-out on eight city locations in China by tracing their horizontal and vertical longitudinal, latitudinal lines noting the date, time and sunlight feeding of temperatures in the Celsius scale with the help of simulation and modeling tools like CFD, ANSYS FLUENT software, mesh geometry tools, and by using the Navier-Stokes and Continuity equations by fluid flow discharge rate, mass flow, water temperature and dropping of temperature, radiation working mechanisms, dimensions of water flowing tubes and absorber plates, density, the velocity of water as the working fluid, the viscosity of water in a cold and hot state as a process of Pre-design. Work also focuses on the comparison between flat plate collector and curved plate collector radiant sunlight absorption, As end result it is found the Curved plate collector produces 22% more elevated heat of outgoing water than flat plate collector.

Optimization of Stationary Flat-Plate Solar Collectors

2015 ◽  
Author(s):  
Singiresu S. Rao
Keyword(s):  
Game Theory ◽  
Solar Energy ◽  
Flat Plate ◽  
Solar Collector ◽  
Probabilistic Approach ◽  
Design Parameters ◽  
Theory Approach ◽  
Solar Collectors ◽  
Beam Radiation ◽  
The Game Theory

The optimum design of stationary flat-plate solar collectors is considered using the game theory approach for multiple objectives. The clear day solar beam radiation and diffuse radiation at the location of the solar collector are estimated. Three objectives are considered in the optimization problem formulation: maximization of the annual average incident solar energy, maximization of the lowest month incident solar energy and minimization of the cost. The game theory solution represents the best compromise in terms of the supercriterion selected. Because some design parameters such as solar constant, altitude, typical day of each month and most of the design variables are not precisely known, a probabilistic approach is also proposed in this work. The results obtained by the determinist and probabilistic approaches are compared. It is found that the absolute value of each objective function decreases with an increase in either the probability of constraint satisfaction or the coefficient of variation of the random variables. This work represents the first work aimed at the application of multi-objective optimization strategy, particularly the game theory approach, for the solution of the solar collector design problem.

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