Next Generation Parabolic Trough Solar Collectors for CSP

2012 ◽  
Author(s):  
Daniel T. Chen ◽  
Glenn Reynolds ◽  
Allison Gray ◽  
Ben Ihas ◽  
Gary Curtis ◽  
...  
Keyword(s):  
Solar Collector ◽  
Concentration Ratio ◽  
Step Change ◽  
Successful Implementation ◽  
National Renewable Energy Laboratory ◽  
Parabolic Trough ◽  
Space Frames ◽  
The Subject ◽  
Utility Scale ◽  
Parabolic Collector

In order for Concentrating Solar Power (CSP) to become a significant contributor to utility scale baseload power, dramatic reductions in cost and increases in performance must be achieved. 3M Company and Gossamer Space Frames have developed advanced collectors that are centered on a step-change in solar technology aimed at transforming the economics and industrialization of CSP. In particular, we focus on mirror film based reflective materials, stiff and shape accurate panel constructions, and lightweight and accurate space frames. These technology elements have been combined into a new parabolic collector design with an aperture of 7.3 m and length of 12 m. The geometric concentration ratio of the design is 103, far exceeding current designs. The National Renewable Energy Laboratory (NREL) has measured an intercept factor exceeding 99% on the subject collector fielded at SEGS II (Daggett, CA). The successful implementation of this technology platform has implications for new solar collector designs for both point and line focus systems.

scholarly journals An Investigation of the Effect of Different Nanofluids in a Solar Collector

2017 ◽  
Vol 7 (4) ◽  
pp. 1741-1745
Author(s):  
H. A. Fakhim
Keyword(s):  
Thermal Efficiency ◽  
Solar Collector ◽  
Concentration Ratio ◽  
Volume Fraction ◽  
Fluid Velocity ◽  
Average Temperature ◽  
Nano Fluid ◽  
Parabolic Form ◽  
Parabolic Collector

In this article, we examine the use of different nanofluids in a solar collector in a parabolic form. Temperature, thermal efficiency and outlet average temperature for a conventional parabolic collector and a collector with nanofluid are compared. The effect of various parameters (concentration ratio, volume fraction of nanoparticles, absorption and fluid velocity) are studied. Results are discussed and it is shown that nano fluid increases the efficiency of the collector.

The SkyTrough™ Parabolic Trough Solar Collector

2009 ◽  
Author(s):  
Adrian Farr ◽  
Randy Gee
Keyword(s):  
Solar Collector ◽  
High Efficiency ◽  
Low Cost ◽  
Frame Structure ◽  
Component Part ◽  
Parabolic Trough ◽  
Actuation System ◽  
Inrush Currents ◽  
Parabolic Trough Solar Collector ◽  
Utility Scale

The SkyTrough™ is a new high-efficiency parabolic trough solar collector that has been designed with features to reduce capital cost, shorten installation time, and reduce O&M cost. This collector builds on the excellent success of prior generation utility-scale parabolic trough designs, but incorporates several engineering and material innovations, listed below. 1. Lightweight, low cost, unbreakable non-glass reflectors using ReflecTech® Mirror Film with reflectance equal to silvered glass mirrors — and easy to install and replace, 2. Large aperture area parabolic trough module with more than double the aperture area of the Nevada Solar One (NSO) module, 3. Longer linear receiver (SCHOTT PTR™80) utilized to match the larger aperture width SkyTrough, 4. Aluminum space frame structure that is considerably lighter per unit of aperture area compared to NSO, 5. Total component “part count” that is considerably reduced per unit of aperture area, yielding a shorter assembly time per unit of aperture than the NSO modules, 6. Hydraulic-based rotary actuation system that provides built-in “stow” locking capability and higher torque capability compared to NSO, 7. SkyTrakker™ control system reduces inrush currents and reduces parasitic power consumption associated with collector sun tracking.

scholarly journals Design and Optimization of Elliptical Cavity Tube Receivers in the Parabolic Trough Solar Collector

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Fei Cao ◽  
Lei Wang ◽  
Tianyu Zhu
Keyword(s):  
Negative Correlation ◽  
Solar Collector ◽  
Concentration Ratio ◽  
Tracking Error ◽  
Parabolic Trough ◽  
Focal Distance ◽  
Error Angle ◽  
Design And Optimization ◽  
Elliptical Cavity ◽  
Parabolic Trough Solar Collector

The nonfragile cavity receiver is of high significance to the solar parabolic trough collector (PTC). In the present study, light distributions in the cavity under different tracking error angles and PTC configurations are analyzed. A new elliptical cavity geometry is proposed and analyzed. It is obtained from this study that light distribution on the tube receiver is asymmetrical when tracking error occurs. On increasing the tracking error angle, more lights are sheltered by the cavity outer surface. The PTC focal distance has negative correlation with the cavity open length, whereas the PTC concentration ratio has positive correlation with the cavity open length. Increasing the tracking error angle and increasing the PTC focal distance would both decrease the cavity blackness. Introducing a flat plate reflector at the elliptical cavity open inlet can largely increase the cavity darkness.

USING ACTIVE TEACHING METHODS IN THE PROCESS OF UNIVERSITY STUDENTS’ COMMUNICATIVE COMPETENCE DEVELOPMENT (WITHIN THE SUBJECT “THE RUSSIAN LANGUAGE AND SPEECH CULTURE”)

2020 ◽  
Vol 86 (1) ◽  
pp. 127-137
Author(s):  
V.V. Gavrilov ◽  
Keyword(s):  
Teaching Methods ◽  
Process Model ◽  
Communicative Competence ◽  
Educational Process ◽  
Russian Language ◽  
Successful Implementation ◽  
University Graduates ◽  
Active Teaching ◽  
The Subject ◽  
The Russian Language

This article states the need to change the approach, as well as the forms and methods of teaching in the process of developing students' speech within the subject "The Russian language and Culture of speech". The purpose of the study is to describe the ways of active teaching methods application in order to improve students' speech culture. The author notes that modern teaching methods have ceased to respond to the needs of society and do not contribute to successful socialization of university graduates. The novelty of the study lies in the fact that the author proposes that the work on a text (in the broad sense of the term) should become the main one in the teaching process. . The author proposes an updated process model of trainingenumerates those teaching forms and methods that contribute to the successful implementation of the model, describes the conditions of using these methods in the educational process. According to the author, the modeling of problem-based situations, the use of active teaching forms and methods reveal new opportunities to the teacher, help to develop students' communicative competence, and will largely determine further successful socialization of graduates.

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