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GB/T 4271-2021: Test methods for the performance of solar collectors
Status: Valid GB/T 4271: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4271-2021 | English | 799 |
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Test methods for the performance of solar collectors
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GB/T 4271-2021
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| GB/T 4271-2007 | English | 1799 |
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Test methods for the thermal performance of solar collectors
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GB/T 4271-2007
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| GB/T 4271-2000 | English | RFQ |
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Test methods for the thermal performance of flat plate solar collectors
| Obsolete |
GB/T 4271-2000
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| GB/T 4271-1984 | English | RFQ |
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3 days [Need to translate]
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Testing method for rating the thermal performance of flat plate solar collectors
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GB/T 4271-1984
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PDF similar to GB/T 4271-2021
Basic data | Standard ID | GB/T 4271-2021 (GB/T4271-2021) | | Description (Translated English) | Test methods for the performance of solar collectors | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F12 | | Word Count Estimation | 42,482 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 4271-2021: Test methods for the performance of solar collectors---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test methods for the performance of solar collectors
ICS 27:160
CCSF12
National Standards of People's Republic of China
Replacing GB/T 4271-2007
Test method for solar collector performance
Published on 2021-12-31
2022-07-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Symbols and Units 2
5 withstand voltage 4
6 Standard stagnation temperature5
7 Air drying 6
8 External thermal shock 7
9 Internal Thermal Shock 7
10 Rain 8
11 Freeze resistant 10
12 Mechanical load 10
13 Impact resistance 12
14 Thermal performance 13
15 Pressure drop 25
Appendix A (Normative) Inspection Report 26
Appendix B (normative) Density and specific heat capacity of water 37
Appendix C (Informative) Area Conversion of Thermal Performance Parameters of Collectors 38
Figure 1 Location of the collector and nozzle for the rain test 8
Figure 2 Spray area of flat plate collector (shaded area) 9
Figure 3: Spray area of evacuated tube collector (shaded area) 9
Figure 4 Schematic diagram of fixing parts and connection points 11
Figure 5 Schematic diagram of the test system 17
Figure 6 Collector Time Constant 22
Figure 7 Symmetry planes and angles related to the determination of the angle of incidence correction factor 23
Table 1 Symbols and units2
Table 2 Meteorological conditions of air drying test 7
Table 3 Nominal diameter, mass and test speed of ice hockey 12
Table 4 Measurement parameter deviation limits within the test period 19
Table 5 Collector power20
Table 6 Weighting factor values 22
Table 7 Recommended angle for testing the angle of incidence correction factor24
Table 8 Incident angle correction factor Table 25
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents"
drafted:
This document replaces GB/T 4271-2007 "Test method for thermal performance of solar collectors": Compared with GB/T 4271-2007, except for the
In addition to structural adjustments and editorial changes, the main technical changes are as follows:
a) Changed the type of applicable collector (see Chapter 1, Chapter 1 of the:2007 edition);
b) Added the pressure test of liquid flow channel (see Chapter 5);
c) Added standard stagnation temperature test (see Chapter 6);
d) Added air exposure test (see Chapter 7);
e) Added external thermal shock test (see Chapter 8);
f) Added the internal thermal shock test (see Chapter 9);
g) added the rain test (see Chapter 10);
h) Added frost resistance test (see Chapter 11);
i) Added mechanical load test (see Chapter 12);
j) Added impact resistance test (see Chapter 13);
k) Added direct radiation parameter measurement (see 14:4:3);
l) The thermal performance test of medium and high temperature concentrating tracking collectors such as trough type and photovoltaic photothermal composite collectors has been added (see Chapter 14);
m) Changed the test requirements for inlet temperature (see 14:6:4, 8:1:4 of the:2007 edition);
n) increased the peak power and output power of the collector (see 14:7:2);
o) The test method for the effective heat capacity of the collector has been changed (see 14:8:2, 10:2 of the:2007 edition):
Please note that some content of this document may be patented: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed and managed by the National Solar Energy Standardization Technical Committee (SAC/TC402):
This document is drafted by: China Academy of Building Research Co:, Ltd:, China National Institute of Standardization, Shandong Linuorit New Energy Co:, Ltd:
Company, Sunrise Oriental Holdings Co:, Ltd:, Huangming Solar Energy Group Co:, Ltd:, National Solar Water Heater Quality Supervision and Inspection Center (North
Beijing), Beijing Building Materials Inspection and Research Institute Co:, Ltd:, Zhejiang Province Solar Product Quality Inspection Center, Shandong Province Product Quality Inspection Research
Institute, Shandong Sangle Group Co:, Ltd:, Institute of Engineering Thermophysics, Chinese Academy of Sciences, China Academy of Future Energy Systems, Shandong Sunshine Dr: Tai
Yangneng Engineering Co:, Ltd:, Guangdong Wuxing Solar Energy Co:, Ltd:, Hebei Daorong New Energy Technology Co:, Ltd:, Dezhou Jinheng New Energy Co:, Ltd:
Co:, Ltd:, National Key Laboratory of Market Supervision (Energy Efficiency, Water Efficiency and Greening), Jiangsu Keda Environmental Protection Equipment Manufacturing Co:, Ltd:, Nanjing Kezhifeng
Energy Saving Technology Co:, Ltd:, Jianke Environmental Energy Technology Co:, Ltd:
The main drafters of this document: He Tao, Liu Meng, Zhang Xinyu, Ma Guangbai, Jiao Qingtai, Gu Xiuzhi, Zhang Lei, Wang Min, Han Leitao, Li Bojia,
Liu Haibo, Sun Yuquan, Gao Lifeng, Chong Yanqi, Tang Wenxue, Xue Daorong, Han Rongtao, Yang Jie, Wang Boyuan, Zhang Hualiang, Xu Junxiao, Shao Jiajia,
Sun Bangcong, Fang Wenchao, Yuan Wanli, Bian Mengmeng:
First published in 1984 as GB/T 4271-1984, the first revision in:2000, the second revision in:2007; this is the third time
Revised:
Test method for solar collector performance
1 Scope
This document specifies the withstand voltage, standard stagnation temperature, air exposure, external thermal shock, internal thermal shock,
Test methods for rain, frost resistance, mechanical load, impact resistance, thermal properties and pressure drop:
This document applies to laboratory and field tests of liquid working fluid collectors and photovoltaic-photothermal composite solar collectors:
This document does not apply to thermal storage solar collectors with integrated thermal storage and collectors, nor does it apply to solar collectors without transparent covers
Collector:
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document:
GB/T 12936 Terms for Solar Thermal Utilization
GB/T 17683:1 Solar Spectral Irradiance Standard Part 1: Atmospheric Quality 1:5
The normal direct insolation and hemispherical insolation irradiance of
GB/T 19565 Pyranometer
GB/T 33701 Longwave Pyranometer
ISO 9806:2017 Test methods for solar thermal collectors (Solarenergy-Solarthermalcollectors-
Testmethods)
3 Terms and Definitions
Terms and definitions defined in GB/T 12936, GB/T 19565 and ISO 9806:2017 and the following terms and definitions apply to this document:
3:1
longitudinal plane
The plane determined by the normal line of the collector lighting surface and the light collecting axis, or the normal line of the collector lighting surface and the two symmetry axes of the collector lighting surface
The plane defined by the longest axis of symmetry:
3:2
transversalplane
The plane determined by the normal of the lighting surface of the collector and the vertical line of the light-gathering axis in the lighting surface, or the normal of the lighting surface of the collector and two symmetrical
The plane defined by the shortest of the axes of symmetry:
3:3
peakefficiency
When the total irradiance on the lighting surface of the collector is 1000W/m2, and the temperature difference between the average temperature of the collector working medium and the ambient air temperature is 0°C, the
Heater efficiency value:
Note: Calculated according to the instantaneous efficiency equation of the collector based on the lighting area:
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