solar radiation measurement Articles

  • Measures to weaken the influence of solar radiation on peak cooling load in office buildings

    Using the building energy simulation program EnergyPlus, the authors studied and analysed measures to weaken the influence of solar radiation on peak cooling load in office buildings. The peak cooling reduction effect on exterior wall outside surface solar radiant absorptance and different kinds of exterior window constructions were analysed by simulation. The results show that using a low solar ...


    By Inderscience Publishers

  • Ionising Radiation

    Introduction The energy level of some types of radiation is high enough so that when they interact with matter they cause the formation of electrically charged particles or ion-pairs and break molecular bonds. These so-called ionising radiations are by their nature potentially harmful to life; at high doses they can be lethal and at lower doses can cause genetic damage. Ionising radiation occurs ...

  • ´More Stations. More Data. Better Forecasts.´ – the NYS Mesonet

    “More Stations. More Data. Better Forecasts.” – that’s the slogan of New York State Mesonet. The weather observation network consists of a total of 125 weather stations all over the state of New York and Lufft was selected as one of the vendors to support them in capturing the data. All 125 of the weathers stations have the standard instrumentation suite. Of those 125, 17 ...

  • Solar radiation estimated from measured air temperature: a review and proposed a new model

    Estimation of solar radiation from measured air temperature offers an important alternative in the absence of measured solar radiation because of the wide availability of air temperature data. Solar radiation is considered as the most important parameter in meteorology, solar conversion, and renewable energy applications. Many correlation models have been developed to estimate daily solar ...


    By Inderscience Publishers

  • A study of radiation shield effectiveness

    A brief comparison of temperature readings in two passively-ventilated and three fan-aspirated radiation shields under conditions of low wind and relatively high insolation is presented. From each of two periods of study, two days were chosen for conditions of high insolation and low wind to illustrate a reasonable sample of the performance of the shields. A single sample of each shield was used ...


    By Davis Instruments Corp.

  • Non-Ionising Radiation

    Pressures on the environment may occur through chemical, physical and biological agents. The subject of this study is physical agents, where physical fields are examined. Physical fields are part of the natural environment. Depending upon their properties and the surrounding conditions, physical fields are transmitted through the spaces in which we live, potentially affecting human health and ...

  • Calibration of selected pyranometers and satellite derived solar radiation in Puerto Rico

    Knowledge of solar radiation at the ground surface is valuable for many disciplines. In this study, ground–based sensors at Fortuna and Mayaguez, Puerto Rico, were used to calibrate daily–integrated satellite–derived solar radiation. The calibration equations yielded R² values of 0.88 and 0.83 at Fortuna and Mayaguez, respectively. A regression equation was also derived ...


    By Inderscience Publishers

  • Synthesis of incoming shortwave radiation for hydrological simulation

    Over the past decade, measurements of incoming shortwave radiation and of its proxy, daily bright sunshine hours, have become scarce in western Canada and elsewhere. As these data are critical for computing net radiation for snowmelt, evaporation, soil thaw and other components of the hydrological cycle, other means to estimate incoming shortwave radiation are needed. National Centers for ...


    By IWA Publishing

  • Correlation model of hourly diffuse solar radiation based on ASHRAE model: a study case in India

    Measurements of diffuse and global solar radiation carried out from January 2001 to December 2005 at Ahmedabad, Mumbai, Calcutta, Chennai and Pune cities of India, representing varying weather conditions of the entire country, have been used to develop the correlation model for the estimating hourly values of diffuse solar radiation on horizontal surface. The comparisons of the present estimated ...


    By Inderscience Publishers

  • Relating geo–meteorological parameters to global solar radiation for Egypt by Iranna–Bapat's estimation models

    Estimation of solar radiation is considered as the most important parameter for the design and development of various solar energy systems. But, the availability of the required data is very scarce and often not readily accessible. The foremost objective of the present study was to estimate the monthly average global solar radiation (GSR) at various locations for Egypt, by the generalised ...


    By Inderscience Publishers

  • Statistical analysis and inter-comparison of the solar UVB, UVA and global radiation for Beer Sheva and Neve Zohar (Dead Sea), Israel

    A statistical analysis and inter-comparison of the solar UVB, UVA and global radiation for Beer Sheva and Neve Zohar (Dead Sea) are presented utilizing data measured from January 1995 through December 2002. Beer Sheva is located approximately 65km to the west of and 700m above Neve Zohar. The monthly average hourly and daily values for all radiation types at both sites are reported. The standard ...


    By Springer

  • Photocatalytic reactive oxygen species production and phototoxicity of titanium dioxide nanoparticles are dependent on the solar ultraviolet radiation spectrum

    Generation of reactive oxygen species (ROS) by titanium dioxide nanoparticles (nano‐TiO2) and its consequent phototoxicity to Daphnia magna were measured under different solar ultraviolet (UV) spectra by applying a series of optical filters in a solar simulator. Removing UV‐B (280–320 nm) from solar radiation had no significant impact on photocatalytic ROS production of nano‐TiO2, whereas removal ...


    By John Wiley & Sons, Ltd.

  • Phototoxicity of TiO2 nanoparticles under solar radiation to two aquatic species: Daphnia magna and Japanese medaka

    One target of development and application of TiO2 nanoparticles (nano‐TiO2) is photochemical degradation of contaminants and photo‐killing of microbes and fouling organisms. However, few ecotoxicological studies have focused on this aspect of nano‐TiO2, specifically whether this photoreactivity might significantly increase hazard and risk of the materials in the natural environment. In the ...


    By John Wiley & Sons, Ltd.

  • Measuring of the Sunshine Duration

    The WMO (World Meteorological Organization) defines the Sunshine Duration as the time during which the direct solar radiation exceeds the level of 120 W/m2.   The DeltaOHM sensor LPSD18, performs the measure of radiation with an array of photodiodes arranged in a particular geometry which allows to obtain an accurate measurement in any ...


    By Delta OHM S.r.L.

  • Meteorological pre-processing of incoming solar radiation and heat flux over a sparse boreal forest at a northern site during winter conditions

    Measurements from Northern Finland on radiation and turbulent fluxes over a sparse boreal forest with snow-covered ground were analysed. The measurements represent harsh winter conditions characterised by low sun angles. The absorption of incoming solar radiation in clear skies (turbidity) was found to be a strong function of the solar elevation. At low solar elevation angles, commonly used ...


    By Inderscience Publishers

  • Relationships between photosynthetically active radiation and clearness index at Bloemfontein, South Africa

    Relationships between photosynthetically active radiation (PAR) and solar radiation (SR) and between diffuse radiation and global radiation at Bloemfontein, South Africa were investigated. The ratio of PAR to SR (PAR/SR) has been reported from many places in the northern hemisphere, but there were not many PAR/SR measurements documented from the southern hemisphere, including the study region. ...


    By Springer

  • Multi-channel solar ultraviolet radiometer

    Solar ultraviolet radiation: The solar ultraviolet radiation reaching the ground is controlled by several factors, such as solar elevation, cloud cover, total ozone amount and ground reflection. A decrease in total ozone abundance is expected to lead to an increase in harmful UV radiation if all other factors are kept unchanged.  Cloudiness is among the largest sources of variance in the daily ...

  • Solar Glossary of Terms

    If you are new to the solar world, there are a few phrases you need to master in order to expertly navigate your way to the best solar installation for home. Here is a brief explanation of all the terms you may encounter during your solar journey. Energy Audit This is an audit conducted by a professional that measures electricity usage in the ...


    By NRG Solar LLC

  • Solar Glossary of Terms

    If you are new to the solar world, there are a few phrases you need to master in order to expertly navigate your way to the best solar installation for home. Here is a brief explanation of all the terms you may encounter during your solar journey. Energy Audit This is an audit conducted by a professional that measures electricity usage in the home. The results allow homeowners to ...


    By Institut für Solartechnik

  • Solar Glossary of Terms

    If you are new to the solar world, there are a few phrases you need to master in order to expertly navigate your way to the best solar installation for home. Here is a brief explanation of all the terms you may encounter during your solar journey. Energy Audit This is an audit conducted by a professional that measures electricity usage in the home. The results ...


    By NRG Solar LLC

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