Download or read book Measurement and Analysis of Near Ultraviolet Solar Radiation written by and published by . This book was released on 1991 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The photocatalytic detoxification of organic contaminants is currently being investigated by a number of laboratories, universities, and institutions throughout the world. The photocatalytic oxidation process requires that contaminants come in contact with a photocatalyst such as titanium dioxide, under illumination of ultraviolet (UV) radiation in order for the decomposition reaction to take place. Researches from the National Renewable Energy Laboratory (NREL) and Sandia National Laboratories are currently investigating the use of solar energy as a means of driving this photocatalytic process. Measurements of direct-normal and global-horizontal ultraviolet (280--385 nm) and full-spectrum (280--4000 nm) solar radiation taken in Golden, Colorado over a one-year period are analyzed, and comparisons are made with data generated from a clear-sky solar radiation model (BRITE) currently in use for predicting the performance of solar detoxification processes. Analysis of the data indicates a ratio of global-horizontal ultraviolet to full-spectrum radiation of 4%--6% that is weakly dependent on air mass. Conversely, data for direct-normal ultraviolet radiation indicate a much large dependence on air mass, with a ratio of approximately 5% at low air mass to 1% at higher at masses. Results show excellent agreement between the measured data and clear-sky predictions for both the ultraviolet and the full-spectrum global-horizontal radiation. For the direct-normal components, however, the tendency is for the clear-sky model to underpredict the measured that. Averaged monthly ultraviolet radiation available for the detoxification process indicates that the global-horizontal component of the radiation exceeds the direct-normal component throughout the year. 9 refs., 7 figs.
Download or read book Measurement and Analysis of Near Ultraviolet Solar Radiation written by and published by . This book was released on 1991 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The photocatalytic detoxification of organic contaminants is currently being investigated by a number of laboratories, universities, and institutions throughout the world. The photocatalytic oxidation process requires that contaminants come in contact with a photocatalyst such as titanium dioxide, under illumination of ultraviolet (UV) radiation in order for the decomposition reaction to take place. Researches from the National Renewable Energy Laboratory (NREL) and Sandia National Laboratories are currently investigating the use of solar energy as a means of driving this photocatalytic process. Measurements of direct-normal and global-horizontal ultraviolet (280--385 nm) and full-spectrum (280--4000 nm) solar radiation taken in Golden, Colorado over a one-year period are analyzed, and comparisons are made with data generated from a clear-sky solar radiation model (BRITE) currently in use for predicting the performance of solar detoxification processes. Analysis of the data indicates a ratio of global-horizontal ultraviolet to full-spectrum radiation of 4%--6% that is weakly dependent on air mass. Conversely, data for direct-normal ultraviolet radiation indicate a much large dependence on air mass, with a ratio of approximately 5% at low air mass to 1% at higher at masses. Results show excellent agreement between the measured data and clear-sky predictions for both the ultraviolet and the full-spectrum global-horizontal radiation. For the direct-normal components, however, the tendency is for the clear-sky model to underpredict the measured that. Averaged monthly ultraviolet radiation available for the detoxification process indicates that the global-horizontal component of the radiation exceeds the direct-normal component throughout the year. 9 refs., 7 figs.
Download or read book Absolute Intensity Measurements in the Extreme Ultraviolet Spectrum of Solar Radiation written by H. E. Hinteregger and published by . This book was released on 1965 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Ultraviolet Radiation written by Christos S. Zerefos and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following the rapid developments in the UV-B measurement techniques and the rapidly growing research in the field in the late 80's and early 90's, we organized a large gathering of distinguished experts in a NATO Advanced Study Institute, held in Halkidiki, Greece on October, 2-11. 1995. The Institute was organized so as to include state of the art lectures on most aspects of solar ultraviolet radiation and its effects. This was achieved by extended lectures and discussions given in five sessions by 27 lecturers and a demonstration of filed measurements and calibration techniques at the end of the Institute. The ASI began with the sun and fundamentals on solar radiative emissions and their variability in time and continued with the interaction of solar Ultraviolet with the atmosphere through the complex scattering processes and photochemical reactions involved. Particular emphasis was given to changes in atmospheric composition imposed by different manifestations of the solar activity cycle. as well as on the modelling of radiative transfer through the atmosphere and the ocean under variable environmental conditions. Overviews on the ozone issue. its monitoring and variability were extensively discussed with emphasis on the observed acceleration of ozone decline in the early 90's. This acceleration had as a consequence, significant increases in UV-B radiation observed at a few world-wide distributed stations.
Download or read book Measurement of Ultra Violet UV Solar Radiation written by Abdullahi Shittu and published by LAP Lambert Academic Publishing. This book was released on 2019-06-14 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The intensity of the UV solar radiation has strong dependency on the Aerosol Optical Thickness (AOT). The UV solar radiation on earth depends on geometrical factors such as altitude, latitude, solar zenith angle and other atmospheric parameters. In this work, an attempt has been made to study the variation of the intensity of UV solar radiation with time for the period of three months. The UV solar radiation measured was compared with AERONET Aerosol Optical Thickness (AOT) values at two discrete wavelengths of 340nm and 380nm for Ilorin located in the North Central part of Nigeria (8o30'N, 4o33'E). The correlation between mean daily values of both is to test the possibility of estimating AOT from AERONET AOT data by comparing with the raw UV solar radiation data measured by PACE UV sensor which is a different instrument at Ilorin station. A fair correlation value of 0.59 was obtained for the period of May to July, 2014 for the wavelengths 340nm and 380nm wavelengths. The slopes, and intercepts were (-2.77, 5.91) and (-3.00, 5.97) for 340 nm and 380 nm respectively Using the obtained slope and intercept, AOT values were estimated from the UV radiation measurement.
Download or read book Ultraviolet Radiation written by Matthew Luckiesh and published by . This book was released on 1922 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement and Analysis of Local Solar Radiation Data written by Robert Stephen Krebs and published by . This book was released on 1980 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pilot Study of Ultraviolet Radiation in Los Angeles October 1965 written by National Center for Air Pollution Control (U.S.) and published by . This book was released on 1967 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UVB Instrumentation and Applications written by Ann R Webb and published by CRC Press. This book was released on 1998-07-28 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: An excellent summary of solar UV measurement for anyone involved in, or contemplating, measuring the UV part of the solar spectrum. The book is addressed predominantly to the newcomer to this expanding area of environmental measurement, but contains sufficient detail and practical information to be a valuable reference for the more experienced worker. The practical considerations of solar UV measurement are clearly described and the book explores the current state of the art of UV monitoring, explained by the historical demand for data. The many applications of solar UV data are discussed and the importance of making appropriate measurements and collecting sufficient supporting data for the analysis required of these applications is highlighted.
Download or read book Scattered and Filtered Solar UV Measurements written by Alfio V. Parisi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides a comprehensive understanding of the scattered and filtered solar UV environment, the techniques to measure this radiation and the resulting UV exposures to humans. As is well known, the incidence of skin cancer and sun-related eye disorders can be reduced by minimization exposure to UV radiation. The book aims to quantify, understand and provide information on the effects of filtered and scattered UV light.
Download or read book A Guide to Solar Radiation Measurement written by Reinhold Rösemann and published by . This book was released on 2011 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Visible Spectroscopy in EBT3 Solar Ultraviolet Dosimeter written by Ummi Shuhada Osman, Ahmad Fairuz Omar and published by Penerbit USM. This book was released on 2021-12-08 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gafchromic external beam therapy (EBT) films have been widely used in clinical dosimetric applications due to their high sensitivity to ionizing radiation such as X-ray and electron beams. In 2011, International Specialty Products (ISP) introduced a new generation of films called EBT3 film. The films exhibit color changes from light green to darker color with the increment of absorbed doses of ionizing radiation. The color changes of the films are commonly characterized using flatbed reflective scanner, and subsequently being used to predict the absorbed dose. Besides ionizing radiation, EBT3 films have also been proven to have high sensitivity towards ultraviolet radiation, and hence, make it a promising method in measuring solar ultraviolet radiation exposure. This research book presents a comprehensive visible spectroscopy method in characterizing the color changes of EBT3 films specifically for the measurement of solar ultraviolet exposure. The visible spectroscopy method and analysis presented in this book is also applicable for other types of transparent films for radiation dosimetry.
Download or read book Pilot Study of Ultraviolet Radiation in Los Angeles October 1965 written by John S. Nader and published by . This book was released on 1970 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Radiation written by Elisha B. Babatunde and published by BoD – Books on Demand. This book was released on 2012-03-21 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains fundamentals of solar radiation, its ecological impacts, applications, especially in agriculture, architecture, thermal and electric energy. Chapters are written by numerous experienced scientists in the field from various parts of the world. Apart from chapter one which is the introductory chapter of the book, that gives a general topic insight of the book, there are 24 more chapters that cover various fields of solar radiation. These fields include: Measurements and Analysis of Solar Radiation, Agricultural Application / Bio-effect, Architectural Application, Electricity Generation Application and Thermal Energy Application. This book aims to provide a clear scientific insight on Solar Radiation to scientist and students.
Download or read book Ultraviolet Radiation in the Solar System written by M. Vázquez and published by Springer Science & Business Media. This book was released on 2006-06-30 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the history of science the opening up of a new observational or experimental window is always followed by an increase in knowledge of the subject concerned. This is also the case with the subject of this book, ultraviolet radiation (hereafter UV). In principle, the ultraviolet range might be just one more of these windows, of no particular importance. However, the energy per UV photon provides the main peculiarity, its magnitude being great enough to produce important ch- ical reactions in the atmospheres of planets and satellites, thereby a?ecting the transmission of this radiation to the ground. The Sun is the main natural source of UV radiation in the Solar System and our planet is the body where its in?uences can be best tested and the only one where its relation with life can be studied. However, the terrestrial atmosphere blocksmostofthephotonsinthiselectromagneticrangeandastronomershavehad to develop various techniques (balloons, planes and rockets) to cross this barrier and access the information. These tools have been used in parallel to investigate the physical properties of the terrestrial atmosphere and the interaction of its constituents with light. This book will addresses most of these topics.
Download or read book Measurements of Ultra violet Solar Radiation written by Edison Pettit and published by . This book was released on 1932 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
