Development and Modification of a Cassegrainian Solar Concentrator for Utilization of Solar Thermal Power

Solar Energy ◽  
2003 ◽  
Author(s):  
L. A. Stoynov ◽  
Prasad K. D. V. Yarlagadda
Keyword(s):  
Solar Energy ◽  
Experimental Testing ◽  
Thermal Power ◽  
Solar Thermal ◽  
Solar Concentrator ◽  
Beam Focusing ◽  
Solar Thermal Power ◽  
Beam Transmission ◽  
Solar Energy Concentrator ◽  
Almost All

Almost all life on Earth has been using solar energy in many ways, but when high temperatures are desired, concentration of the incident solar radiation (insolation) becomes necessary. The present work is an attempt to improve and experimentally compare alternative beam delivering and focusing energy systems of a small solar concentrator. The researched solar energy concentrator (SEC) facility consists of modified two mirror Cassegrainian solar concentrator, two-speed sun-tracking manual and automatic control, concentrated insolation transmitting and continuous beam focusing systems. A number of system modifications during the development of the two stage, point focusing type solar concentrator arrangement for solar thermal power utilization have also been explored and are reported in this paper. Some of the experimental testing results obtained using single polymer fiber 14 mm in diameter, a truncated conical concentrator, and auxiliary lens system alternatives, have been compared. In addition, some details about various improvements of the sun-tracking sensor and automatics, beam transmission and continuous focusing capabilities of the SEC facility have been described.

scholarly journals The Evaluation of Solar Contribution in Solar Aided Coal-Fired Power Plant

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Rongrong Zhai ◽  
Yongping Yang ◽  
Yong Zhu ◽  
Denggao Chen
Keyword(s):  
Power Plant ◽  
Solar Energy ◽  
Power Plants ◽  
Large Scale ◽  
Evaluation Method ◽  
Thermal Power ◽  
Energy Resource ◽  
Solar Thermal ◽  
Future Research ◽  
Solar Thermal Power

Solar aided coal-fired power plants utilize various types of solar thermal energy for coupling coal-fired power plants by using the characteristics of various thermal needs of the plants. In this way, the costly thermal storage system and power generating system will be unnecessary while the intermittent and unsteady way of power generation will be avoided. Moreover, the large-scale utilization of solar thermal power and the energy-saving aim of power plants will be realized. The contribution evaluating system of solar thermal power needs to be explored. This paper deals with the evaluation method of solar contribution based on the second law of thermodynamics and the principle of thermoeconomics with a case of 600 MW solar aided coal-fired power plant. In this study, the feasibility of the method has been carried out. The contribution of this paper is not only to determine the proportion of solar energy in overall electric power, but also to assign the individual cost components involving solar energy. Therefore, this study will supply the theoretical reference for the future research of evaluation methods and new energy resource subsidy.

scholarly journals A clustering approach for the analysis of solar energy yields: A case study for concentrating solar thermal power plants

2016 ◽  
Author(s):  
Carlos M. Fernández Peruchena ◽  
Javier García-Barberena ◽  
María Vicenta Guisado ◽  
Martín Gastón
Keyword(s):  
Solar Energy ◽  
Power Plants ◽  
Thermal Power ◽  
Solar Thermal ◽  
Thermal Power Plants ◽  
Solar Thermal Power ◽  
Clustering Approach

Applicability of Nanofluids in Concentrated Solar Energy Harvesting

2010 ◽  
Author(s):  
Robert A. Taylor ◽  
Patrick E. Phelan ◽  
Todd P. Otanicar ◽  
Himanshu Tyagi ◽  
Steven Trimble
Keyword(s):  
Solar Energy ◽  
Thermal Power ◽  
Solar Thermal ◽  
Thermal Systems ◽  
Thermal Plant ◽  
Solar Thermal Power ◽  
Concentrated Solar Energy ◽  
Solar Energy Harvesting ◽  
Improve Heat Transfer ◽  
Solar Resource

Concentrated solar energy is becoming the input for an increasing number of thermal systems [1]. Recent papers have indicated that the addition of nanoparticles to conventional working fluids (i.e. nanofluids) can improve heat transfer and solar collection [2–4]. Thermal models developed herein show that nanofluid collectors can be more efficient than conventional concentrating solar thermal technology. This work indicates that power tower schemes are the best application for taking advantage of potential nanofluid efficiency improvements. This study provides a notional design of how such a nanofluid power tower receiver might be built. Using this type of design, we show a theoretical enhancement in efficiency of up to a 10% by using nanofluids. Further, we compare the energy and revenue generated in a conventional solar thermal plant to a nanofluid one. It was found that a 100MWe capacity solar thermal power tower operating in a solar resource similar to Tucson, AZ could generate ∼$3.5 million more per year by incorporating a nanofluid receiver.

Study on the Optimum Angle for Solar Collector

2014 ◽  
Vol 532 ◽  
pp. 483-486
Author(s):  
Li Jun Liu ◽  
Zhong Hua Dai ◽  
Xiao Qing Li
Keyword(s):  
Solar Energy ◽  
Solar Collector ◽  
Thermal Power ◽  
Solar Thermal ◽  
Solar Thermal Power ◽  
Optimum Angle

To increase the efficiency of solar energy, a method for setting the collector was established, which can enhance the solar thermal power in winter. The optimum angles of the quasi-fixed solar collector and fixed solar collector were calculated. For Daqing area, their values were given, the angle is 4945.51for quasi-fixed solar collector and it is 5355.97 for fixed solar collector. Comparing the quasi-fixed solar collector with fixed solar collector in Daqing area, the better choice is the quasi-fixed solar collector.

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