GB/T 25965-2010 English PDF

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GB/T 25965-2010: Test methods of normal emittance of materials and hemispherical emittance of all-glass evacuated collector tubes
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25965-2010	229	Add to Cart	3 days	Test methods of normal emittance of materials and hemispherical emittance of all-glass evacuated collector tubes	Valid

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Basic data

Standard ID: GB/T 25965-2010 (GB/T25965-2010)
Description (Translated English): Test methods of normal emittance of materials and hemispherical emittance of all-glass evacuated collector tubes
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F01
Classification of International Standard: 27.160
Word Count Estimation: 10,163
Date of Issue: 2011-01-10
Date of Implementation: 2011-05-01
Quoted Standard: GB/T 12936; GB/T 17049
Regulation (derived from): National Standard Approval Announcement 2011 No.1 (Total No.166)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the method of measuring the spectral selective absorbing coating to emit more than the all-glass vacuum tube solar collector absorbing coating equipment hemisphere emission ratio, devices and requirements, sample size and requirements, test conditions, test procedures and test methods. This standard applies to materials and spectrally selective absorbing coating measurement of emission ratio transmission and all-glass vacuum tube solar collector hemisphere than in the development and production process and process specifications screening method to sample.

GB/T 25965-2010: Test methods of normal emittance of materials and hemispherical emittance of all-glass evacuated collector tubes

---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 of normal emittance of materials and hemispherical emittance of all-glass evacuated collector tubes ICS 27.160 F01 National Standards of People's Republic of China Materials and methods to launch than the all-glass vacuum solar Collector tube hemisphere emission ratio test method Issued on. 2011-01-10 2011-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard by the National Standardization Technical Committee for Energy and Management, National Standardization Technical Committee proposed solar energy. This standard by the National Standardization Technical Committee of solar energy (SAC/TC402) centralized. This standard is drafted by. satellite factory in Beijing, Beijing Tsinghua Solar Energy Development Co., Ltd., the national solar water heater Quality Supervision and Inspection Center (Beijing), China National Institute of Standardization, Shenzhen Jiapu-Solar Limited, Tsinghua University, China Metrology Research Institute, Beijing Solar Energy Research Institute Co., Ltd., Beijing-Kowloon Co., Himin Solar Energy Group Co., Ltd., Shandong Linuo new materials Ltd., Jiangsu Sun Rain Solar Co., Ltd., Hubei Huayang Solar Group Limited. The main drafters of this standard. Nahum Yue, Huang Zhelin, Jia Tieying, Yin Zhiqiang, Wang Yu, Han Jiangong, Liu really, Zhou Xiaowen, Yang Shan, Chen Ge, Fengai Rong, Liu Xijie, Li Xuguang catchments and utilization Huang Yongding. Materials and methods to launch than the all-glass vacuum solar Collector tube hemisphere emission ratio test method

1 Scope

This standard specifies the measured spectrum selective absorbing coating method to transmit than with all-glass vacuum tube solar collector absorbing coating hemisphere emission ratio Equipment, devices and requirements and sample size requirements, test conditions, test procedures and test methods. This standard applies to materials and spectrally selective absorbing coating in the development and production process to transmit and process specifications screening method of the sample The ratio of all-glass vacuum tube solar collector hemisphere emission measurement ratio.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 12936 solar thermal terms GB/T 17049 all-glass vacuum tube solar collector 3 Terms, symbols and units GB/T 12936 and established the following terms and definitions apply to this standard. 3.1 Degree of radiation emitted radiantexitance Me, W/m2 At a point away from the surface of the radiant energy flux bins, divided by the surface of the cell area. 3.2 Emission ratio emittance ε, dimensionless Shoot degrees than the degree of radiation emitted radiation at the same temperature radiator with full radiator (black body) is. 3.3 Hemisphere emission ratio hemisphericalemittance εh, dimensionless At the same temperature, the ratio of the degree of radiation emitted in the solid angle 2π radiator degree of radiation emitted and blackbody. 3.4 Normal emissivity ratio normalemittance εn, dimensionless The radiation emitted upward at a surface temperature than the law.

4 normal emissivity ratio measurement method

4.1 Measuring devices and requirements Normal emissivity ratio measuring device consisting of a black body cavity, the sample chamber, zero calibration chamber, the thermosensitive element chamber and the water bath and so on. Blackbody chamber and test ......

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