scholarly journals Performance of cylindrical parabolic solar collector with the tracking system

2021 ◽  
Vol 3 (1) ◽  
pp. 20-24
Author(s):  
M. Anil Kumar ◽  
K. Sridhar ◽  
B. Devika
Keyword(s):  
Heat Transfer ◽  
Solar Collector ◽  
Fundamental Problem ◽  
Tracking System ◽  
Low Cost ◽  
Radiant Energy ◽  
Heat Transfer Fluid ◽  
Project Work ◽  
Design Development ◽  
Parabolic Trough

A parabolic solar collector collects the radiant energy emitted from the sun and focuses on a point. Parabolic trough collectors are the low-cost implementation of concentrated solar power technology that focuses incident sunlight onto a tube filled with a heat transfer fluid. However, the fundamental problem with the cylindrical parabolic collector without tracking was that the solar collector does not move with the sun's orientation. The development of an automatic tracking system for cylindrical parabolic collectors will increase solar collection and the efficiency of devices. The present study of this project work presents an experimental platform based on the design, development, and performance characteristic of water heating by tracking solar cylindrical parabolic concentrating system. The tracking mechanism is to be made by stepper motor arrangement to receive the maximum possible energy of solar radiation as it tracks the sun's path. The performance of the parabolic trough collectors is experimentally investigated with the water circulated as heat transfer fluid. The collector efficiency is calculated.

scholarly journals Performance evaluation of nanofluid on parabolic trough solar collector

2020 ◽  
Vol 24 (2 Part A) ◽  
pp. 853-864 ◽  
Author(s):  
Gopalsamy Vijayan ◽  
Karunakaran Rajasekaran
Keyword(s):  
Heat Transfer ◽  
Aluminum Oxide ◽  
Solar Collector ◽  
Focal Point ◽  
Deionized Water ◽  
Hot Water ◽  
Heat Transfer Fluid ◽  
Maximum Efficiency ◽  
Parabolic Trough ◽  
Parabolic Trough Solar Collector

In the present work, the performance of aluminum oxide and deionized water nanofluid used as heat transfer fluid on a parabolic trough solar collector system with hot water generation tank is evaluated. The parabolic trough solar collector is developed using easily and locally accessible materials. Five different concentrations of aluminum oxide and deionized water based nanofluid from 0.5-2.5% is prepared by the magnetic stirrer initially and then the mixture is subjected to ultrasonication process to break aggregates with the absence of surfactant. The prepared nanofluids are allowed to flow through the absorber which is located at a focal point of the solar collector. The performance of nanofluid is compared with pure deionized water. The test is conducted from 8.00 a. m. to 16.00 p. m. daily in the whole length of the test span. The heat transfer fluid is allowed to flow at a mass-flow rate of 0.020 kg/s and 0.09246 m/s velocities. The maximum solar radiation is 821 W/m2, and maximum efficiency is observed at noon time 60.41% for deionized water and 60.49% for 2.5% volumetric fraction of alumina nanofluid. The efficiency enhancement was 3.90% than deionized water. The influence of the critical parameter on the performance is also examined.

Experimental evaluation of a stationary parabolic trough solar collector: Influence of the concentrator and heat transfer fluid

2020 ◽  
Vol 276 ◽  
pp. 124174
Author(s):  
Eloiny Guimarães Barbosa ◽  
Marcio Arêdes Martins ◽  
Marcos Eduardo Viana de Araujo ◽  
Natália dos Santos Renato ◽  
Sérgio Zolnier ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Evaluation ◽  
Solar Collector ◽  
Heat Transfer Fluid ◽  
Parabolic Trough ◽  
Parabolic Trough Solar Collector

scholarly journals Thermal performance and design parameters investigation of a novel cavity receiver unit for parabolic trough concentrator

2020 ◽  
Author(s):  
Khaled Mohamad
Keyword(s):  
Heat Transfer ◽  
Radiant Energy ◽  
Theoretical Background ◽  
Heat Transfer Fluid ◽  
Design Parameters ◽  
Fluid Temperature ◽  
Parabolic Trough ◽  
Simulation Code ◽  
Chi Squared ◽  
Receiver Unit

In this paper, we discuss an improved concept for a cavity receiver unit for Solar Parabolic Trough Collectors (PTC) with the application of hot mirror coating (HMC) on a cavity aperture. This design aims to lessen radiant energy losses while operating at higher temperatures by incorporating a variety of optically active layers. We present the theoretical background, which we derived in previous work, and the resulting implementation in a simulation code. We next discuss the layout and results of an experiment, which allowed us to make contact with the simulation with minor adjustments It was seen that the correspondence between the experiment and simulation results was encouragingly close (Chi-squared p > 0.8 and p > 0.95), and we proceeded to investigate simulations of different receiver designs. Simulated outcomes for the temperature of the heat transfer fluid, temperature maps, and efficiencies are presented. Our proposal indicates temperature-related benefits when compared to other popular designs in terms of the heat transfer fluid temperature and efficiency.

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