Analysis of Selective Absorber Coatings on Thermal Performance of the Solar Flat-Plate Collector

2013 ◽  
Vol 690-693 ◽  
pp. 2093-2097
Author(s):  
Xiao Dong Han ◽  
Shi Wei Zhang ◽  
Chuan Chen ◽  
Yong Tang
Keyword(s):  
Flat Plate ◽  
Thermal Performance ◽  
Test System ◽  
Chromium Coating ◽  
Experimental Results ◽  
The Other ◽  
Thermal Loss ◽  
Anodic Coating ◽  
Relative Absorption ◽  
Flat Plate Collector

In this work, a solar flat-plate collector test system is developed. The solar flat-plate collectors with anodic coating, chromium coating and blue core coating are tested. The experimental results indicate that the relative absorption ration α/ε of blue core coating is up to 19. The efficiency of collector with blue core coating is 78.66%, which is 5% higher than collectors with the other two types of coatings. In addition, collector with blue core coating has smaller total thermal loss coefficient. The blue core coating can effectively improve the performance of solar flat-plate collectors.

ENHANCEMENT OF THERMAL PERFORMANCE OF SOLAR FLAT PLATE COLLECTOR USING SiO2 NANOFLUID

2017 ◽  
Vol 12 (4) ◽  
pp. 33 ◽  
Author(s):  
DALWADI M.D. ◽  
NAIK H.K. ◽  
PADHIAR R.D. ◽  
RANA S.S. ◽  
CHAVDA N.K. ◽  
...  
Keyword(s):  
Flat Plate ◽  
Thermal Performance ◽  
Flat Plate Collector

Thermal performance augmentation of a solar flat plate collector using the shot peening technique

2019 ◽  
Vol 26 (3) ◽  
pp. 437-445 ◽  
Author(s):  
Ganesh Kumar Poongavanam ◽  
D. Sakthivadivel ◽  
M. Meikandan ◽  
K. Balaji ◽  
V. S. Vigneswaran
Keyword(s):  
Flat Plate ◽  
Thermal Performance ◽  
Shot Peening ◽  
Flat Plate Collector

The Efficiency of New Solar Flat-Plate Collector

2011 ◽  
Vol 347-353 ◽  
pp. 1337-1341
Author(s):  
Rui Duan
Keyword(s):  
Flat Plate ◽  
The Other ◽  
Absorber Plate ◽  
Specific Calculation ◽  
Glass Model ◽  
Collector Efficiency ◽  
Preliminary Study ◽  
Flat Plate Collector ◽  
Highly Porous ◽  
Highly Porous Material

Aerogel is a highly porous material. It has the best thermal insulation properties in all solid-state materials. This paper carried out a preliminary study to see the influence on efficiency of flat-plate collector used aerogel. Keeping the other parts of flat-plate collector unchange, the aerogel layer is placed between the transparent cover and absorber plate. Through specific calculation, analysed thermal efficiency of this model of flat-plate collector, and compared with the ordinary glass model. The results show that aerogel can greatly improve collector efficiency , as table 1 show the efficiency of aerogel model is 1.66 times higher than ordinary model.

scholarly journals Multi-thermal performance optimization of semi-circular heat pipes integrated with various solar collector profiles

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Mohammed Yunus ◽  
Mohammad S. Alsoufi
Keyword(s):  
Thermal Resistance ◽  
Flat Plate ◽  
Thermal Performance ◽  
Performance Optimization ◽  
Solar Collector ◽  
Desirability Function ◽  
Heat Output ◽  
Correlation Models ◽  
Overall Efficiency ◽  
Flat Plate Collector

AbstractSolar collector (SC) technology has proved promising applications in heating, desalination, refrigeration of water, etc. Thermal performance (TP) of Heat Pipe (HP) improves by combining the various profiled absorber plate with a flat-plate collector. The objective is to study HP attributes' effect (heat inputs, pipe inclinations, and mass flow rates of water) with various profiles of absorber plates in a flat-plate SC on the TP. Semi-circular HP combining with the flat, V-grooved, and V-troughed absorber plates in a flat-plate collector improved TP. They are heat output, thermal resistance, and overall efficiency explored experimentally by adapting the response surface method's (RSM) central composite design. A major impacting applicant factor was heat input for improving TPs, and correlation models were generated from ANOVA. The optimal input attributes are obtained to minimize thermal resistance and maximize heat output and overall efficiency from RSM and desirability function. Confirmation test was conducted using optimal settings and their corresponding estimated values of the TP attributes to compare with the experimental results shown very close agreement between them established.

Designing a laser-cut panel for light collection for daylighting using a generalised mathematical model

2020 ◽  
pp. 147715352093262
Author(s):  
S Singh ◽  
DS Bisht ◽  
H Garg
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Flat Plate ◽  
Light Output ◽  
The Other ◽  
Light Collection ◽  
Light Pipe ◽  
Current Design ◽  
Complex Mechanisms ◽  
Flat Plate Collector

The current daylighting requirements require a system that can maintain a uniform light output throughout the day while enabling deep and controlled penetration of sunlight. If such a system is simple to manufacture, inexpensive and incorporates no moving parts and maintenance, it can easily fulfil all the daylighting needs. This paper focuses on the development of such a system using laser-cut panels. Mathematical models for determining the dimensions of a laser-cut panel and its efficiency were developed. A laser-cut panel collector was designed based on these models and simulated. The results showed enhanced light output at light pipe end by up to 47 times and 32 times as compared to a flat plate collector in the month of June and December, respectively and up to nine times for a dome collector for the designed range of sun altitudes. For this range, the ratio of pipe output to input was up to 4.5 times higher than the other collectors. The light at diffuser side was more distributed for the laser-cut panel collector. The current design, however, did not provide appropriate reduction in illuminance at peak hours in June. This approach can easily be used for light collection without involving any complex mechanisms.

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