ISO 9459-2-1995 Solar heating - Domestic water heating systems - Part 2 Outdoor test methods for system performance characterization and yearly performance pred.pdf
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1、INTERNATIONAL STANDARD IS0 9459-2 First edition 1995-08-I 5 Solar heating - Domestic water heating systems - Part 2: Outdoor test methods for system performance characterization and yearly performance prediction of solar-only systems Chauffage solaire - Syst the procedures are therefore suitable for
2、 testing all types of systems, including forced circulation, thermosiphon, freon-charged and integrated collector-storage systems. This part of IS0 9459 is not intended to be used for testing solar heating systems which have an auxiliary heater as an integral part of the system, since the operation
3、of the auxiliary input may influence the performance of the solar heating system. To quantify the interaction between the energy inputs, the test procedure described in IS0 9459-3 is recommended. This part of IS0 9459 applies to solar-only domestic water heating systems designed to heat potable wate
4、r to be supplied for domestic water usage and is not intended to be applied to other systems. The test procedures are applicable only to systems of 0,6 m3 of solar storage capacity or less. The test procedures in this part of IS0 9459 do not require the solar water heating system to be subjected to
5、freezing conditions. Consequently, the energy consumed or lost by a system while operating in the freeze- protection mode is not determined. This part of IS0 9459 is not generally applicable to concentrating systems. It is not intended to be used for testing the individual components of the system,
6、nor is it intended to abridge any safety or health requirements. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 9459. At the time of publication, the editions indicated were valid. All standards are s
7、ubject to revision, and parties to agreements based on this part of IS0 9459 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. 1 IS0 9459-2: 1995(E
8、) Q IS0 IS0 9060:1990, Solar energy - Specification and classification of instruments for measuring hemispherical solar and direct solar radiation. IS0 9459-3: -11, Solar heating - Domestic water heating systems - Part 3: Performance test for solar plus supplementary systems. IS0 9846:1993, Solar en
9、ergy - Calibration of a pyranometer using a pyrheliometer. IS0 9847:f 992, Solar energy - Calibration of field pyranometers by comparison to a reference pyranometer. ISOflR 9901: 1990, Solar energy - Field pyranometers - Recommended practice for use. IS0 11924:-J, Solar heating - Domestic water heat
10、ing systems - Test methods for the assessment of reliability and safety. World Meteorological Organization, Guide to Meteorological Instruments and Methods of Observation, No. 8, 5th edition, WMO, Geneva, 1983, Chapter 9 - World Radiometric Reference, known as the WRR. 3 Definitions As stated in the
11、 Introduction, each part of IS0 9459 has been conceived as a self-contained document. Therefore, some of the terms with their definitions given in this clause may also appear in other part(s) of IS0 9459. For the purposes of this International Standard, the following definitions apply. 3.1 absorber:
12、 Device within a solar collector for absorbing radiant energy and transferring this energy as heat into a fluid. 3.2 accuracy: Ability of an instrument to indicate the true value of the measured physical quantity. 3.3 ambient air: Air in the space (either indoors or outdoors) surrounding a thermal e
13、nergy storage device, a solar collector, or any object being considered. 3.4 angle of incidence (of direct solar radiation): Angle between the solar radiation beam and the outward-drawn normal from the plane considered. NOTE 1 Angle of incidence is often termed “incidence angle” or “incident angle”.
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