scholarly journals Application of Solar Energy to Continuous Belt Dehydration

1979 ◽  
Author(s):  
B. J. Graham
Keyword(s):  
Solar System ◽  
Natural Gas ◽  
Solar Energy ◽  
Department Of Energy ◽  
Dehydration Process ◽  
Evacuated Tubes ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

A solar system utilizing a 553-m2 (5950-ft2) array of evacuated tube collectors has been designed to augment the heat supplied by natural gas to a Proctor & Schwartz continuous belt dryer used for processing onions and garlic at the Gilroy Foods plant in Gilroy, California. It has been calculated that the array, which contains 3216 evacuated tubes, will contribute 2.47 × 1012 J/yr (2340 MBtu/yr) to the dehydration process. The system is currently being installed and will be operational for drying in May 1979. This project was sponsored by the U. S. Department of Energy under Contract No. E-(40-1)-5119.

Review of Materials and Environment Management for Solar Thermal Collectors

2014 ◽  
Vol 521 ◽  
pp. 539-542
Author(s):  
Da Yu Zheng ◽  
Juan Zheng ◽  
Xiang Yi Guan ◽  
Jia Zheng ◽  
Yi Ming Zhang
Keyword(s):  
Heat Transfer ◽  
Flat Plate ◽  
Heat Pipe ◽  
Research Work ◽  
Solar Thermal ◽  
Senior Managers ◽  
Solar Thermal Collectors ◽  
Evacuated Tubes ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

To cover the main contributions and developments in solar thermal collectors through focusing on materials, heat transfer characteristics and manufacturing challenges. A range of published papers and internet research including research work on various solar thermal collectors (flat plate, evacuated tubes, and heat pipe tube) were used. Evaluation of solar collectors performance is critiqued to aid solar technologies make the transition into a specific dominant solar collector. The sources are sorted into sections: finding an academic job, general advice, teaching, research and publishing, tenure and organizations. Provides information about types of solar thermal collectors, indicating what can be added by using evacuated tube collectors instead of flat plate collectors and what can be added by using heat pipe collectors instead of evacuated tubes. Focusing only on three types of solar thermal collectors (flat plate, evacuated tubes, and heat pipe tube). Useful source of information for consultancy and impartial advice for graduate students planning to do research in solar thermal technologies. This paper fulfils identified information about materials and heat transfer properties of materials and manufacturing challenges of these three solar thermal collectors. Describes some changes made to improve the environment which have had unforeseen and adverse effects on safety and the reasons why we need more case histories. Also discusses the reasons why there are no permanent solutions to safety problems and the reasons why senior managers should become more involved in safety problems.

scholarly journals The Comparison of Solar Energy Gaining Effectiveness between Flat Plate Collectors and Evacuated Tube Collectors with Heat Pipe: Case Study

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1829 ◽  
Author(s):  
Piotr Olczak ◽  
Dominika Matuszewska ◽  
Jadwiga Zabagło
Keyword(s):  
Solar Energy ◽  
Flat Plate ◽  
Heat Pipe ◽  
Hot Water ◽  
Energy Productivity ◽  
External Conditions ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube ◽  
Family House

In Poland, various solar collector systems are used; among them, the most popular are flat plate collectors (FPCs) and evacuated tube collectors (ETCs). The work presents two installations located at a distance of 80 km apart, working in similar external conditions. One of them contains 120 flat plate collectors and works for the preparation of hot water in a swimming pool building; the second one consists of 32 evacuated tube collectors with a heat pipe and supports the preparation of domestic hot water for a multi-family house. During the comparison of the two quite large solar installations, it was confirmed that the use of evacuated tube solar collectors shows a much better solar energy productivity than flat plate collectors for the absorber area. Higher heat solar gains (by 7.9%) were also observed in the case of the gross collector area. The advantages of evacuated tube collectors are observed mainly during colder periods, which allows for a steadier thermal energy production.

Solar Energy Collection With Evacuated Tubes

1965 ◽  
Vol 87 (3) ◽  
pp. 270-276 ◽  
Author(s):  
E. Speyer
Keyword(s):  
Solar Energy ◽  
Mass Production ◽  
Air Conditioning ◽  
Tube Wall ◽  
Glass Tube ◽  
Different Temperatures ◽  
Evacuated Tubes ◽  
Liquid Flows ◽  
Evacuated Tube ◽  
Economic Considerations

Engineering and economic considerations are given for nontracking solar energy collectors where the absorbing surface is insulated by an evacuated space. Each collector is a long glass tube, about two in. in dia, silvered in the lower portion. The selectively blackened conduit through which liquid flows is suspended within the evacuated tube, passing through the tube wall at only one end. Prototype tubular collectors were built, and tested when evacuated and when air-filled. The measured efficiencies at different temperatures are given, and the data fitted by empirical equations. Costs per tube and per Btu are given together with an indication of applicability to solar air conditioning. Mass production of these collectors will depend on the indicated demand.

scholarly journals Effect of Reflecting Material on CPC to Improve the Performance of Hybrid Groundwater Solar Desalination System

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
S. A. Kedar ◽  
A. K. Bewoor ◽  
G. Murali ◽  
Ravinder Kumar ◽  
Milad Sadeghzadeh ◽  
...  
Keyword(s):  
Solar Energy ◽  
Low Cost ◽  
Aluminum Foil ◽  
Weather Conditions ◽  
Soft Water ◽  
Single Stage ◽  
Human Beings ◽  
Solar Desalination ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

Water-energy nexus is a crucial and challenging concern that addressing it is noteworthy for the future of human beings. In addition, freshwater production is a highly energy-intensive procedure. Therefore, developing a suitable solution for this problem is of importance. In the present scenario, solar energy is one of the suitable options for desalination because solar energy is available at a low cost, is clean for the environment, and is widely available. Generally, solar collectors such as flat plate collectors (FPC) and evacuated tube collectors were experimented for desalination applications. This work presents an experimental investigation of a single-stage hybrid (ETC-CPC) groundwater solar desalination system. A compound parabolic concentrator (CPC) is placed below the evacuated tube collector (ETC) for collecting solar radiations to transfer heat to evacuated tubes which improves performance in the case of different weather conditions of Pune city in India. Experimental results show that the hybrid solar groundwater desalination system, by maintaining the optimum distance of 20 mm between ETC and CPC with Mylar as the reflecting material, could offer a drinking water production rate of up to 3.4 l/(m2h)/day. However, the proposed single-stage hybrid (ETC+CPC) groundwater solar desalination system with aluminum foil as a reflecting material could generate 1.9 liters of soft water per day. Further, the use of Mylar as a reflecting material could generate 3.5 liters of soft water per day.

Review of Materials for Solar Thermal Collectors

2010 ◽  
Vol 171-172 ◽  
pp. 486-489
Author(s):  
Jie Li
Keyword(s):  
Heat Transfer ◽  
Flat Plate ◽  
Heat Pipe ◽  
Research Work ◽  
Solar Thermal ◽  
Solar Thermal Collectors ◽  
Evacuated Tubes ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube ◽  
Transfer Properties

To cover the main contributions and developments in solar thermal collectors through focusing on materials, heat transfer characteristics and manufacturing challenges. A range of published papers and internet research including research work on various solar thermal collectors (flat plate, evacuated tubes, and heat pipe tube) were used. Evaluation of solar collectors performance is critiqued to aid solar technologies make the transition into a specific dominant solar collector. The sources are sorted into sections: finding an academic job, general advice, teaching, research and publishing, tenure and organizations. Provides information about types of solar thermal collectors, indicating what can be added by using evacuated tube collectors instead of flat plate collectors and what can be added by using heat pipe collectors instead of evacuated tubes. Focusing only on three types of solar thermal collectors (flat plate, evacuated tubes, and heat pipe tube). Useful source of information for consultancy and impartial advice for graduate students planning to do research in solar thermal technologies. This paper fulfils identified information about materials and heat transfer properties of materials and manufacturing challenges of these three solar thermal collectors.

Evaluating the Ecosystem Service Benefits of Native Vegetation Management at Solar Energy Facilities

2021 ◽  
Author(s):  
Leroy Walston ◽  
Heidi Hartmann
Keyword(s):  
Ecosystem Services ◽  
Solar Energy ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Vegetation Management ◽  
Energy Development ◽  
Department Of Energy ◽  
Land Uses ◽  
Solar Pv ◽  
Pollination Services

<p>Concomitant with the increase in solar photovoltaic (PV) energy development over the past decade has been the increasing emphasis on land sharing strategies that maximize the land use efficiency of solar energy developments.  Many of these strategies focus on improving the compatibility of solar energy development with other co-located land uses (e.g., agriculture) and by improving several ecosystem services that could have natural, societal, and industrial benefits. One such land opportunity is the restoration and management of native grassland vegetation beneath ground-mounted PV solar energy facilities, which has the potential to restore native habitat to conserve biodiversity and restore previously altered ecosystem services (e.g., natural pollination services). This presentation will discuss various assessment and modeling approaches to evaluate the scale and magnitude of the ecosystem services provided by different vegetation management strategies at solar PV energy development sites. This work demonstrates how multifunctional land uses in energy systems represents a win-win solution for energy and the environment by optimizing energy-food-ecology synergies. This work was conducted by Argonne National Laboratory for the U.S. Department of Energy Solar Energy Technologies Office under Contract No. DE-AC02-06CH11357.</p>

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