Results 151 to 160 of about 1,095 (200)

The Larger Results of 20 Years of Solar Radiation Observations. [PDF]

Proc Natl Acad Sci U S A, 1922
Abbot CG, Fowle FE, Aldrich LB.
europepmc   +1 more source

A New Pyrheliometer and The Standard of Solor Radiation

Journal of the Instrument Technology, Japan, 1955
Okada, Kiyoshi, Satone, Hanji
openaire   +1 more source

An easily designed and constructed photovoltaic pyrheliometer

Solar & Wind Technology, 1988
Abstract In this paper, a simple Normal Incident Pyrheliometer, called a photovoltaic pyrheliometer, is proposed. The device consist of, as the name implies, a polycrystalline solar cell and a collimator tube. The collimator tube has a square field.
A R M Alamoud
exaly   +4 more sources

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Development of an Electrical Substitution Pyrheliometer

2024 8th International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)
The study of solar radiation is of fundamental importance within the context of global climate change and its applications range from understanding the planet's climate to optimizing energy systems.
Luiz Angelo Berni
exaly   +3 more sources

Re-evaluation of trends in atmospheric column transparency from pyrheliometer measurements in Madrid (1910–1929)

Atmospheric Research, 2019
The behavior of the surface solar radiation (SSR) during the first half of 20th century is an open issue due to the scarcity of SSR data during this period.
Arturo Sanchez-Lorenzo, Manuel Anton, A J P Aparicio   +2 more
exaly   +2 more sources

A novel pyrheliometer of high accuracy

Solar Energy, 1987
Abstract In this paper, analyses have been carried out for a novel blackbody model, which is made by employing a hemispheric mirror. It is calculated that the effective absorptance of the model can approach unity by correctly choosing the coatings and the geometric parameters.
Z.M. Zhang, X.S. Ge, Y.F. Wang
exaly   +2 more sources

A transient calorimeter pyrheliometer of high accuracy

Solar Energy, 1990
Abstract The problems of how to improve the accuracy and keep the stability of the transient calorimeter pyrheliometer have been solved by the following methods: (i) a hemispheric mirror shell with a small hole at its top is situated over a copper disk sensor. The inner wall of the shell has high reflectivity, acting as a specular reflector.
S.X. Cheng, X.S. Ge, J.A. Li, H.Q. Feng
exaly   +2 more sources

Pyrheliometer Control Design for the Solar Energy Research Facility at Valparaiso University

American Control Conference, 2020
In this paper a tracking control technique of the pyrheliometer used in Solar Energy Research Facility of Valparaiso University is presented. Due to nonlinearities in the kinetic model for both azimuth and elevation degrees, the Lyapunov theorem was ...
Shahin S. Nudehi, Peter Krenzke, Luke J. Venstrom   +2 more
semanticscholar   +1 more source

Recalibration of SPN1 pyranometers against pyrheliometer and its relevance for the evaluation of concentrating solar process heat plants

, 2020
Accurate determination of direct normal irradiance (DNI) is essential for evaluating and monitoring of concentrating solar power (CSP) and solar process heat (SPH) plants. Currently, a bi-axially tracked Pyrheliometer (PHM) is the most accurate measuring
J. Möllenkamp, T. Beikircher, A. Häberle   +2 more
semanticscholar   +1 more source

Pyrheliometer, Element 61, and more

Scientific American, 1942
openaire   +2 more sources