A Strong, Low-Cost Mount for Parabolic Dish Solar Collectors

1995 ◽  
Vol 117 (3) ◽  
pp. 205-209
Author(s):  
C. Cordy
Keyword(s):  
Solar Energy ◽  
Low Cost ◽  
Polar Axis ◽  
Gear Train ◽  
Large Radius ◽  
Structural Members ◽  
The Earth ◽  
Parabolic Dish ◽  
Solar Energy Concentrator ◽  
High Winds

This paper presents the design of a cradle for mounting solar energy concentrator dishes. The cradle is strong and provides unobstructed space to mount a well braced dish. It will survive high winds without being driven to a stow position. The axes of rotation of the dish pass near the plane of the edge of the dish to reduce wind-induced torques in the drive system. Large radius tracks are attached to both the dish and cradle so the gear train on the drive motors can be simple and inexpensive. The cradle is a strong gimbal mount built of 12 structural members in the form of three tetrahedra. It provides a polar axis mount for the concentrator dish. All forces parallel to the polar axis are delivered to the earth at the end of the cradle closest to the equator.

scholarly journals Solar concentrators manufacture and automation

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 93-103
Author(s):  
Ernst Kussul ◽  
Tetyana Baydyk ◽  
Alberto Escalante Estrada ◽  
Maria Teresa Rodríguez González ◽  
Donald Wunsch II
Keyword(s):  
Solar Energy ◽  
Production Systems ◽  
Low Cost ◽  
Solar Concentrators ◽  
Energy Devices ◽  
Automated Technology ◽  
Parabolic Dish ◽  
Cost Of Materials ◽  
The Cost ◽  
Energy Plants

Abstract Solar energy is one of the most promising types of renewable energy. Flat facet solar concentrators were proposed to decrease the cost of materials needed for production. They used small flat mirrors for approximation of parabolic dish surface. The first prototype of flat facet solar concentrators was made in Australia in 1982. Later various prototypes of flat facet solar concentrators were proposed. It was shown that the cost of materials for these prototypes is much lower than the material cost of conventional parabolic dish solar concentrators. To obtain the overall low cost of flat facet concentrators it is necessary to develop fully automated technology of manufacturing and assembling processes. Unfortunately, the design of known flat facet concentrators is too complex for automation process. At present we develop the automatic manufacturing and assembling system for flat facet solar concentrators. For this purpose, we propose the design of flat facet solar concentrator that is convenient for automatization. We describe this design in the paper. At present, almost all solar-energy plants in the world occupy specific areas that are not used for agricultural production. This leads to a competition between the solar-energy plants and agriculture production systems. To avoid this competition, it is possible to co-locate solar-energy devices in agricultural fields. The energy obtained via such co-location can be used for agricultural needs (e.g., water extraction for irrigation) and other purposes (e.g., sent to an electrical grid). In this study, we also describe the results of an investigation on co-location methods for the minimal loss of agricultural harvest too.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

Sandwich hydrogel with confined plasmonic Cu/carbon cells for efficient solar water purification

2021 ◽  
Author(s):  
Cheng Tian ◽  
Chengcheng Li ◽  
Delun Chen ◽  
Yifan Li ◽  
LEI XING ◽  
...  
Keyword(s):  
Solar Energy ◽  
Water Purification ◽  
Low Cost ◽  
Energy Utilization ◽  
Solar Water ◽  
Solar Energy Utilization

Designing low-cost and efficient evaporation system to maximize solar energy utilization is of great importance for the emerging solar water purification technologies. Herein, we demonstrate a universal sandwich hydrogel by...

scholarly journals The use of solar energy for the curing of ferrogeopolymer elements in the semiarid region

2019 ◽  
Vol 276 ◽  
pp. 01031 ◽  
Author(s):  
Partogi H Simatupang ◽  
Petrus Lubalu ◽  
Herry L Sianturi ◽  
Wilhelmus Bunganaen
Keyword(s):  
Solar Energy ◽  
Low Cost ◽  
Glass Plate ◽  
Energy Resource ◽  
Semiarid Region ◽  
Collector System ◽  
Good Potential ◽  
Dry Seasons ◽  
Wire Meshes ◽  
Potential Use

Kupang City in Timor Island of Indonesia, as a semiarid area, has abundant solar energy sources. Based on climatology data of Kupang City in 2013-2015, the minimum and maximum average temperatures in Kupang City range from 19.3-34.8oC. Besides, dry seasons last for about 8 months (April-November). This abundance of solar energy is a potential energy resource for the manufacturing of environmentally friendly ferrogeopolymer elements. Based on previous research, the production of geopolymer material can be done optimally with dry curing treatment at 60-80oC for less than 48 hours. Therefore, in this paper, a low-cost, energy efficient oven operated by a solar energy collector was developed. This paper describes a feasibility study of the use of solar energy for curing ferro-geopolymer elements. The ferro-geopolymer elements made were beams with length 600 mm, width 100 mm and height 100 mm. Wire meshes with 6x6mm of opening were used in 5 layers. The solar energy collector system used as an oven was a zinc coated drum which was painted black outwardly and was covered by a glass plate. Using this oven, it was possible to increase the ambient temperature by 1.62 to 2,37 times. Furthermore, this oven can also increase the flexure strength of ferrogeopolymer elements about ± 25.34%. This paper shows good potential use of solar energy in the manufacturing of ferro-geopolymer elements in the semiarid region.

Low Cost Silicon for Solar Energy Conversion Applications

1978 ◽  
Vol 22 (4) ◽  
pp. 335-345 ◽  
Author(s):  
G. H. Schwuttke ◽  
T. F. Ciszek ◽  
K. H. Yang ◽  
A. Kran
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Low Cost ◽  
Solar Energy Conversion

THE COSMIC JOURNEY OF ODYSSEUS

Numen ◽  
2001 ◽  
Vol 48 (4) ◽  
pp. 381-416 ◽  
Author(s):  
Nanno Marinatos
Keyword(s):  
Iron Age ◽  
Mediterranean Region ◽  
Near East ◽  
British Museum ◽  
Polar Axis ◽  
The Sun ◽  
East Mediterranean ◽  
The Earth ◽  
The Universe ◽  
East Mediterranean Region

AbstractIn vain have scholars tried to produce a coherent geographical picture of Odysseus' travels. It is argued here that Odysseus makes a cosmic journey at the edges of the earth (perata ges), a phrase used in the text to describe several lands that the hero visits. The cosmic journey was a genre current in the East Mediterranean region in the Iron Age. It was modeled on the Egyptian the journey of the sun god who travels twelve hours in the darkness of the underworld and twelve hours in the sky. Evidence of similar concepts in the Near East is provided by a Babylonian circular map (now in the British Museum) as well as by Phoenician circular bowls. Gilgamesh seems to perform a cosmic journey. As well, Early Greek cosmology utilizes the concept of a circular cosmos. Odysseus' journey spans the two cosmic junctures of the universe: East, where Circe resides, and West, where Calypso lives. Another polar axis is the underworld and the island of the sun.

Gravimetric Method for Calibrating Flow Meter

2014 ◽  
Vol 501-504 ◽  
pp. 2335-2337
Author(s):  
Xi Ming Zhang ◽  
Xue Li
Keyword(s):  
Solar Energy ◽  
Gravimetric Method ◽  
Correction Coefficient ◽  
Flow Meter ◽  
The Earth ◽  
Improve Measurement ◽  
Long Time ◽  
Experimental Errors ◽  
Lower Energy Density ◽  
Test Use

What the earth obtain the energy annually is ten thousand times of the earth energy consumption at present,but the solar energy has a lower energy density on the earth’s surface .solar energy is the main source of all energy The experimental research was conducted for the heating performance utilizing the solar-assisted heat pump experimental platform. Experimental errors will be caused to flow meter by different measured media and long time usage In order to improve measurement precision and reduce the experimental errors, this test use gravimetric method to calibrate the LZB glass rotor meter and MCE08-787 cumulative flow meter of indoors and outdoors pipes. The paper also presents flow correction coefficient to guarantee both the accuracy and reliability of the experimental results.

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