scholarly journals Thermal Efficiency Evaluation of a Solar Thermal Steam Generating System Using Thermosiphon Technique with Parabolic Trough Collector

2020 ◽  
Vol 9 (1) ◽  
pp. 28
Author(s):  
Abiem Louis Tersoo ◽  
Akoshile Clement Olufemi
Keyword(s):  
Thermal Efficiency ◽  
Solar Thermal ◽  
Efficiency Evaluation ◽  
Parabolic Trough ◽  
Parabolic Trough Collector ◽  
Generating System

scholarly journals Thermal Performance Comparison of Parabolic Trough Collector (PTC) Using Various Nanofluids

2021 ◽  
Vol 10 (4) ◽  
pp. 875-889
Author(s):  
Ashutosh Shirole ◽  
Mahesh Wagh ◽  
Vivek Kulkarni
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Thermal Efficiency ◽  
Power Plants ◽  
Large Scale ◽  
Solar Thermal ◽  
Pumping Power ◽  
Parabolic Trough ◽  
Parabolic Trough Collector

The objective of this paper is to investigate the theoretical performance of Parabolic Trough Collector (PTC) using various nanofluids. The theoretical performances are calculated for Al2O3, graphite, magnetite, SWCNH, CuO, SiO2, MWCNT, TiO2, Fe2O3, and ZnO in water nanofluids. The heat transfer equations, thermodynamic properties of nanofluid and pumping power are utilised for the development of novel thermal model.  The theoretical thermal efficiency of the PTC is calculated, and the economic viability of the technology is predicted for a range of nanofluid concentration. The results showed that the thermal conductivity increases with the concentration of nanoparticles in the base fluid. Magnetite nanofluid showed the highest thermal efficiency, followed by CuO, MWCNT, ZnO, SWCNH, TiO2, Fe2O3, Al2O3, graphite, and SiO2, respectively. The study reveals that MWCNT at 0.4% concentration is the best-suited nanofluid considering thermal gain and pumping power. Most of the nanofluids achieved optimum efficiency at 0.4% concentration. The influence of mass flow rate on thermal efficiency is evaluated. When the mass flow rate increased from 70 Kg/hr to 90Kg/hr, a 10%-20% efficiency increase is observed. Dispersing nanofluids reduces the levelized cost of energy of large-scale power plants. These findings add to the knowledge of the scientific community aimed explicitly at solar thermal energy technology. The report can also be used as a base to pursue solar thermal projects on an economic basis.

Construction and thermal efficiency test of 145m and 165m SpaceTube® large-aperture parabolic trough collector prototypes

2016 ◽  
Author(s):  
Salvador Valenzuela Rubia ◽  
Markus Schramm ◽  
Hülya Yildiz ◽  
Patrick Marcotte ◽  
David Martín Casero ◽  
...  
Keyword(s):  
Thermal Efficiency ◽  
Parabolic Trough ◽  
Parabolic Trough Collector ◽  
Large Aperture ◽  
Efficiency Test

Enhancing the thermal efficiency of parabolic trough collector using rotary receiver tube

2022 ◽  
Vol 51 ◽  
pp. 101941
Author(s):  
N. Sreenivasalu Reddy ◽  
S. Gowreesh Subramanya ◽  
K.C. Vishwanath ◽  
M. Karthikeyan ◽  
S. Kanchiraya
Keyword(s):  
Thermal Efficiency ◽  
Parabolic Trough ◽  
Parabolic Trough Collector

scholarly journals Experimental Investigation of Heat Losses from a Heat Pipe Based Parabolic Trough Collector used for Direct Steam Generation

2021 ◽  
pp. 31-39
Author(s):  
Abiem Louis Tersoo ◽  
Akoshile Clement Olufemi
Keyword(s):  
Experimental Investigation ◽  
Thermal Efficiency ◽  
Glass Tube ◽  
Heat Losses ◽  
Solar Thermal ◽  
Thermal System ◽  
Steam Generation ◽  
Parabolic Trough ◽  
Direct Steam ◽  
Solar Thermal System

The performance of a thermosiphon based parabolic trough collector (PTC) used for direct steam generation depends largely on the heat losses of the solar thermal system. This paper presents an experimental investigation of the heat losses in a thermosiphon based solar thermal system that used a linear receiver with a PTC for the generation of low temperature steam. A locally constructed PTC was used to concentrate sun rays to a linear copper pipe enclosed in an evacuated glass tube and held at the focal line of the PTC to heat water and generate steam. Circulation of the water in the closed-loop solar thermal system was through natural convection. A solar meter was used to measure the incident radiation flux at the experimental site and PT100 temperature sensors were installed at different points of the system to measure the temperature distribution within the system. The thermal efficiency and overall heat losses of the system were investigated by fitting the experimental data to standard equations. The results showed that the instantaneous thermal efficiency of the system was 46.48%, 43.1% and 45.32% respectively for three days examined. The overall heat losses in the system were 1211.95, 974.32 and 911.26 kwh per day respectively for the three days investigated. Heat losses from the tank accounted for over 83% of the losses for all the days examined. The evacuated glass tube reduced heat losses from the receiver to very low values of 2.31, 1.63 and 1.43 KWh per day respectively for the three days tested. The use of a better insulating material on the tank was recommended to reduce convective and conductive heat losses, thereby enhancing the performance of the system.

scholarly journals Optimal forecasting of thermal conductivity and storage in parabolic trough collector using phase change materials

2021 ◽  
Vol 9 (2) ◽  
Author(s):  
P. Muruganantham ◽  
◽  
Balaji Dhanapal ◽  
Keyword(s):  
Solar Energy ◽  
Phase Change ◽  
Heat Loss ◽  
Thermal Efficiency ◽  
Phase Change Materials ◽  
Storage System ◽  
Solar Collectors ◽  
Parabolic Trough ◽  
Fluid Medium ◽  
Parabolic Trough Collector

Renewable energy is one of the cleaner energy generation strategies practiced all over the world to reduce environmental impacts and waste based on current sustainability in economic practices. Solar energy is one kind of renewable sources of energy practiced for different application. The thermal storage system in solar energy is one of the least practiced methods in research, and the utilization of solar energy in the thermal application is attaining higher responses and is quite possible. In this paper, solar heat generation is attained by solar parabolic trough collector using phase change materials. The ideology behind this research is to develop a thermal energy storage system using solar collectors and phase change materials. A composition mixture of MgCl2. 6H2O phase change materials used as the fluid medium in trough collector and thermal efficiency of the material is evaluated. For effective optimization, an imperialist competitive algorithm is used for optimizing the thermal efficiency of the solar collectors. The thermal efficiency of the collector is numerically experimented in the running platform of Mat Lab and executed in terms of heat gain, heat loss, and thermal efficiency of the parabolic trough collector, respectively. The efficiency of the proposed framework is 85%, and the current framework just has 80% efficiency. The heat loss in the proposed framework is lower than that of the current system, distinguished as 4200 W and 4520 W, respectively. It is shown from the research study that the proposed PCM composition is an optimal method for generating heat energy in solar parabolic trough collectors.

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