scholarly journals Assessing the performance of the evacuated tube solar collector using smart curtain through (PSO based PID) controller and Nano fluids

2021 ◽  
Vol 39 (1A) ◽  
pp. 137-152
Author(s):  
Hosham S. Anead ◽  
Khalid F. Sultan ◽  
Sura Abedul Jabbar
Keyword(s):  
Solar Collector ◽  
Pid Controller ◽  
Main Idea ◽  
Heating System ◽  
Working Fluid ◽  
Fluid Temperature ◽  
Nano Fluid ◽  
Collector System ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube

This research revealed control on nanofluid temperature in the evacuated tube solar collector system, where nanofluid used in ETSC as working fluid to increase heating system thermal efficiency. Smart curtain was used to shadow the evacuated tube solar collector in heating or cooling conditions to control the temperature of the nanofluid. Moreover, (PSO based PID) controller which is an artificial intelligence method was ‎applied to control on the shadow the evacuated tube solar collector. Where the curtain's main idea is to control the polarization of the sun's radiation, the work of the curtain refers to the parameters: the first parameter is the nano fluid temperature and the second is the ambient temperature, and one output parameter is defined by (distance parameter).

Nanotechnology: new hope of efficiency enhancement for solar evacuated tube collector

2016 ◽  
Vol 13 (3) ◽  
pp. 199-205 ◽  
Author(s):  
Rupeshkumar V. Ramani ◽  
Bharat M. Ramani ◽  
Anjana D. Saparia ◽  
Nikesh A. Shah ◽  
Pinank Kacha ◽  
...  
Keyword(s):  
Solar Collector ◽  
Pure Water ◽  
Sol Gel ◽  
Chemical Vapor ◽  
Working Fluid ◽  
Physical Vacuum ◽  
Fluid Temperature ◽  
Alternative Source ◽  
Content Type ◽  
Evacuated Tube

Purpose In the twenty-first century, the use of fossil fuels has increased drastically because the necessity of energy is increasing day by day which affects the world’s economy. The solar energy (photo-thermal energy conversion) system is the most economical and eco-friendly alternative source. To increase the use of domestic as well as commercialization purpose, the authors have reviewed this paper on the solar water heater along with its structural mechanism for energy enhancement and to create easier stair steps for climbing on the green world dream. Design/methodology/approach In this study, nanotechnology has remarkably built its own use for extending thermal efficiency by using some gradual experiments. It is a phenomenon, like nanofluid (as a working fluid for a direct solar collector), nanocoating (on the surface of a solar-evacuated tube by using the chemical vapor deposition/physical vacuum deposition/sol–gel technique) and nanorod-based solar collector tube. Findings This invention gives greater efficiency rather than the conventional systems, but also this advancement is not too much supported in a low- temperature environment also, we can consider the poor light absorption characteristics of the pure water (Bencic, et al., 2000). Originality/value The basic idea and understanding of this phenomenon to improve solar collecting performance for obtaining a high working-fluid temperature are discussed in this paper.

scholarly journals Entropy Generation and Thermal Analysis of Nanofluid Flow Inside the Evacuated Tube Solar Collector

2021 ◽  
Author(s):  
S. Mojtaba Tabarhoseini ◽  
M. Sheikholeslami
Keyword(s):  
Heat Transfer ◽  
Entropy Generation ◽  
Solar Collector ◽  
Base Fluid ◽  
Pure Water ◽  
Working Fluid ◽  
Distribution Analysis ◽  
Nanoparticle Dispersion ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube

Abstract In the current investigation, the thermal and thermodynamic behavior of a buoyancy-driven evacuated tube solar collector has undergone precise evaluation, and the efficacy of nanoparticle dispersion in the base fluid has been scrutinized using computational fluid dynamics based on the finite volume method. The natural convection process was analyzed in different vertical sections of the absorber tube. The temperature and velocity distributions of water as the conventional working fluid and the nanofluid were compared at various cutting planes along the tube during the simulation time. In this problem, CuO nanoparticles with optimum thermal properties were suspended in the base fluid. According to the surveyed results, the temperature distribution analysis illustrates that the mean temperature of the tank experiences more enhancement when the nanofluid is used. The comparison of the heat transfer coefficient between two simulated cases shows the competency of utilizing CuO/water nanofluid in the thermal performance improvement of the collector. The results related to entropy generation assessment show that the irreversibility owing to fluid friction rises when the nanofluid is applied during the flow time. In contrast, the entropy generation of pure water owing to heat transfer surpasses the case with nanofluid.

scholarly journals Experimental Investigations of Energy and Exergy Efficiencies of an Evacuated Tube Solar Collector

Proceedings ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 2
Author(s):  
Alicja Siuta-Olcha ◽  
Tomasz Cholewa ◽  
Kinga Dopieralska-Howoruszko
Keyword(s):  
Solar Collector ◽  
Operating Conditions ◽  
Hot Water ◽  
Working Fluid ◽  
Experimental Investigations ◽  
Test Installation ◽  
Climate Conditions ◽  
Evacuated Tube Solar Collector ◽  
Energy And Exergy ◽  
Evacuated Tube

The main purpose of the analysis is to determine the influence of the weather and operating conditions on the energy and exergy efficiencies of an evacuated tube solar collector, heat pipe type with a mixture of water and propylene glycol (50%/50%) as a working fluid under the Polish climate conditions (the geographical coordinates for Lublin: Latitude 51°15′ N and longitude 22°34′ E), according to the experimental data. The solar collector with an aperture area of 3.6 m2 is a main component of the solar hot water test installation located in the laboratory of the Faculty of Environmental Engineering, Lublin University of Technology. Studies have been presented for August. Based on the results, the average daily energy efficiency of the solar collector at the level of 34% (14.3–58.8%) and the average daily exergy efficiency of the solar collector at the level of 2.25% (0.86–3.75%) were established.

scholarly journals Experimental Investigation on Evacuated Tube Solar Collector Using Biofluid as Heat Transfer Fluid

2021 ◽  
Vol 87 (3) ◽  
pp. 40-50
Author(s):  
Lukmon Owolabi Afolabi ◽  
Oluwafunke Afolabi-Owolabi ◽  
Abdulhafid M Elfaghi ◽  
Djamal Hissein Didane ◽  
Mohammed Ghaleb Awadh ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Solar Collector ◽  
Palm Kernel ◽  
Nano Particles ◽  
Heat Transfer Fluid ◽  
Fluid Temperature ◽  
Water Tank ◽  
Kernel Oil ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube

Bio-oil extracted from waste of different plant kernel was used as heat transfer fluid in evacuated tube solar collector. Thermal performance of the biofluids to the enhancement of the evacuated tube solar collector under varying weather conditions and experimental analysis was carried-out. Thermal analysis on the storage water tank temperature, outlet and inlet heat transfer fluid temperature, and heat gains by was studied. In addition, the biofluids thermophysical properties and degradation analysis was conducted and compared with conventional base-fluids. From the results the biofluids caused enhancement of heat gain in the collector receiver by 9.5%, 6.4% and 3.2% for moringa oleifera kernel oil (MOKO), date kernel oil (DKO) and palm kernel oil (PKO), respectively. The storage water tank temperature at night fall was 53, 49, 51 and 47oC, for the MOKO, DKO, PKO and water HTFs, respectively. The biofluids were thermal stable and with no degradation. The biofluids demonstrated potentials as heat transfer fluids in thermal applications but there are needs for more investigations on their enhancement with organically synthesized nano particles to preserve there no corrosive and toxicity nature, and experimental performance on heat exchangers after several heating cycles.

Estimation and optimization of thermal performance of evacuated tube solar collector system

2013 ◽  
Vol 50 (5) ◽  
pp. 711-719 ◽  
Author(s):  
Erkan Dikmen ◽  
Mahir Ayaz ◽  
H. Hüseyin Ezen ◽  
Ecir U. Küçüksille ◽  
Arzu Şencan Şahin
Keyword(s):  
Thermal Performance ◽  
Solar Collector ◽  
Collector System ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube
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