Optimum number of internal fins in parabolic trough collectors

2018 ◽  
Vol 137 ◽  
pp. 669-677 ◽  
Author(s):  
Evangelos Bellos ◽  
Christos Tzivanidis ◽  
Dimitrios Tsimpoukis
Keyword(s):  
Optimum Number ◽  
Parabolic Trough ◽  
Internal Fins

Parabolic Trough Collector with Internal Fractal Fins in Receiver to Increase Thermal Performance in Working Fluid

2020 ◽  
Author(s):  
Angelica Palacios ◽  
Dario Amaya ◽  
Olga Ramos
Keyword(s):  
Thermal Performance ◽  
Flow Simulation ◽  
Simulation Software ◽  
Working Fluid ◽  
Concentrated Solar Power ◽  
Parabolic Trough ◽  
Parabolic Trough Collector ◽  
Internal Fins ◽  
Parabolic Collector ◽  
Production Industry

Abstract Concentrated solar power technologies have been studied in recent years as a potential solution for energy production industry , however this kind of systems face different challenges in order to increase thermal performance and efficiency. This paper presents the results of a thermal analysis on a parabolic trough collector with different receivers internal fins configurations, systems were studied in CFD Solidworks® flow simulation software and compared with a traditional parabolic collector with cylindrical receiver. Results shows that the lowest thermal performance was achieved with a cylindrical pipe, instead fractal fins receiver with 5 internal fins achieves a temperature increase of 27% and the best pipe configuration was fractal Descartes with 12 internal pipes which e the cylindrical temperature in 29%.

AN EXPERIMENTAL INVESTIGATION OF AN ADSORPTION ICE-MAKER DRIVEN BY PARABOLIC TROUGH COLLECTOR

2015 ◽  
Vol 46 (4) ◽  
pp. 347-368 ◽  
Author(s):  
Cheng Li ◽  
T. Yan ◽  
Ruzhu Wang ◽  
Liwei Wang ◽  
T. X. Li ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Parabolic Trough ◽  
Parabolic Trough Collector

Analysis of the horizontal structure of a measurement and control geodetic network based on entropy

2013 ◽  
Vol 62 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Maria Mrówczyńska
Keyword(s):  
Geodetic Network ◽  
The State ◽  
Observation System ◽  
Optimum Number ◽  
Optimum Structure ◽  
Horizontal Structure ◽  
The Difference ◽  
And Control ◽  
Measurement And Control ◽  
Horizontal Displacements

Abstract The paper attempts to determine an optimum structure of a directional measurement and control network intended for investigating horizontal displacements. For this purpose it uses the notion of entropy as a logarithmical measure of probability of the state of a particular observation system. An optimum number of observations results from the difference of the entropy of the vector of parameters ΔHX̂ (x)corresponding to one extra observation. An increment of entropy interpreted as an increment of the amount of information about the state of the system determines the adoption or rejection of another extra observation to be carried out.

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