ISO 9845-1:1992

Solar energy — Reference solar spectral irradiance at the ground at different receiving conditions — Part 1: Direct normal and hemispherical solar irradiance for air mass 1,5

Provides an appropriate standard spectral irradiance distribution to be used in determining relative performance of solar thermal, photovoltaic, and other system components and materials where the direct and hemispherical irradiance component is desired. The tables presented define an air mass 1,5 solar spectral irradiance for the direct normal radiation - 5,8° field-of-view angle - and hemispherical radiation on an equator-facing, 37° tilted plane for an albedo of 0,2. These tables are intended to represent ideal clear sky conditions.

Énergie solaire — Rayonnement solaire spectral de référence au sol sous différentes conditions de réception — Partie 1: Rayonnement solaire direct normal et hémisphérique pour une masse d'air de 1,5

General Information

• Status: Withdrawn
• Publication Date: 30-Sep-1992
• ICS: 27.160 - Solar energy engineering
• Technical Committee: ISO/TC 180/SC 1 - Climate - Measurement and data
• Drafting Committee: ISO/TC 180/SC 1 - Climate - Measurement and data
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 12-Aug-2022

Relations

• Revised: ISO 9845-1:2022 - Solar energy — Reference solar spectral irradiance at the ground at different receiving conditions — Part 1: Direct normal and hemispherical solar irradiance for air mass 1,5
• Effective Date: 23-Apr-2020

Standards Content (Sample)

INTERNATIONAL
STANDARD 98454
First edi tion
1992-1 o-1 5
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--
--.---.-.--- -_.-_~~____-_-_--__-_- __-____ ~
-P-e- -----
Solar energy - Reference solar spectral
irradiance at the ground at different receiving
conditions -
Part 1:
Direct normal and hemispherical solar irradiance
for air mass 1,5
Energie solaire - Rayonnemeut solaire specfral de reference au sel saus
diffkrentes conditions de rkeptiw --
Parlie 1: Rayonnement solaire direct normal et MmisptMque pour wie
masse d’air de 1,5
Reference number
ISO 98454 : 1992( E)

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ISO 9861:1992(E)
Contents
Page
1
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Application of the spectral data for deriving effective solar
irradiances and solar spectrur r I weighted quantities . . . . . . . . . . . . . . 2
2
4 Vaiidation of accuracy . . . .# I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Standard data of direct norma 1 solar irradiance, hemispherical
solar irradiance on an equator-facing, 37” tilted plane and
normalized hemispherical solar irradiance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Annexes
a Atmospheric Parameters of the model atmosphere . . . . . . . . . . . . . 10
B Computational technique for tabulated values derived from the
spectral irradiance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ._. 11
C Plots of solar irradiance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .“. 12
B Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
0 ISO 1992
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie or mechanical. including photocopying and microfilm, without
Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 0 CH-1211 Geneve 20 l Switzerlarrd
Printed in Switzerland
ii

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ISO 9845=1:1992(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Inter-
national Standard requires approval by at least 75 % of the membel
bedies casting a vote.
International Standard ISO 9845-1 was prepared by Technical Committee
ISO/TC 180, Solar energy, Sub-Committee SC 1, Climate -- Measurement
and dafa.
ISO 9845 consists of the following Parts. under the general title Solar
energy - Reference solar spectral irradiance at the ground at different
receiving conditions:
-- Part 1: Direcf normal and hemispherkal solar irradiance for air
mass 1,5
Annexes A, B, C and D of this part of ISO 9845 are for information only.
. . .
Ill

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ISO 984!51:1992(E)
Introduction
Absorbance, reflectance and transmittance of terrestrial solar energy
are important factors in solar thermal System Performance, photovoltaic
System Performance, materials studies, biomass studies and solar
Simulation activities. These Optical properties are normally functions of
wavelength, which requires that the spectral distribution of the solar flux
be known before the solar weighted propet-ty tan be calculated. In Order
to compare the Performance of competitive products, a reference stan-
dard solar spectral irradiance distribution is desirable.
The tables in this part of ISO 9845 provide spectra
...