The origin of the asymmetry in the irradiation distribution at high latitudes
Document identifier: oai:dalea.du.se:2139
Publication year: 1999Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: The possibility of using solar energy during winter depends on the available solar radiation and on the geometry of the receiving surface. For high latitudes, the annual distribution of the available radiation is characterized by high asymmetry with a large amount of solar radiation from high altitude angles during the summer and a small amount of direct radiation from small altitude angles during the winter. This article deals with the origin of the difference between available solar radiation during summer and winter at high latitudes. Factors like the tilt of the earth’s axis, the eccentricity of the earth’s orbit, absorption and scattering of radiation in the atmosphere and seasonal changes in the weather conditions are discussed. Numerical examples of how these factors contribute to the reduction of the winter radiation compared to the summer radiation on surfaces with different orientation in Stockholm, latitude 59.4°N, are given. It is shown that the influence of the atmosphere and seasonal changes in the climate, and not pure earth-sun geometry, are the main reasons why it is hard to utilize solar energy at high latitudes during the winter.
Authors
Mats Rönnelid
Högskolan Dalarna; Miljöteknik
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header:
identifier: oai:dalea.du.se:2139
datestamp: 2021-04-15T12:28:56Z
setSpec: SwePub-du
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recordContentSource: du
recordCreationDate: 2006-05-29
identifier: http://urn.kb.se/resolve?urn=urn:nbn:se:du-2139
titleInfo:
@attributes:
lang: eng
title: The origin of the asymmetry in the irradiation distribution at high latitudes
abstract: The possibility of using solar energy during winter depends on the available solar radiation and on the geometry of the receiving surface. For high latitudes the annual distribution of the available radiation is characterized by high asymmetry with a large amount of solar radiation from high altitude angles during the summer and a small amount of direct radiation from small altitude angles during the winter. This article deals with the origin of the difference between available solar radiation during summer and winter at high latitudes. Factors like the tilt of the earth’s axis the eccentricity of the earth’s orbit absorption and scattering of radiation in the atmosphere and seasonal changes in the weather conditions are discussed. Numerical examples of how these factors contribute to the reduction of the winter radiation compared to the summer radiation on surfaces with different orientation in Stockholm latitude 59.4°N are given. It is shown that the influence of the atmosphere and seasonal changes in the climate and not pure earth-sun geometry are the main reasons why it is hard to utilize solar energy at high latitudes during the winter.
language:
languageTerm: eng
genre:
conference/other
vet
note:
Published
1
name:
@attributes:
type: personal
authority: du
namePart:
Rönnelid
Mats
role:
roleTerm: aut
affiliation:
Högskolan Dalarna
Miljöteknik
nameIdentifier: mrd
originInfo:
dateIssued: 1999
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type: host
titleInfo:
title: North Sun
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url: http://du.diva-portal.org/smash/get/diva2:521623/FULLTEXT01.pdf
url: http://du.diva-portal.org/smash/get/diva2:521623/FULLTEXT02.pdf
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gratis
gratis
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form: electronic
typeOfResource: text