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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 41872-2022: Heat exchanger for refrigerating systems and heat pumps - Performance test and evaluation method based on three-field synergy of temperature, pressure and velocity fields Status: Valid
Basic dataStandard ID: GB/T 41872-2022 (GB/T41872-2022)Description (Translated English): Heat exchanger for refrigerating systems and heat pumps - Performance test and evaluation method based on three-field synergy of temperature, pressure and velocity fields Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J73 Classification of International Standard: 27.200 Word Count Estimation: 18,128 Date of Issue: 2022-10-14 Date of Implementation: 2023-02-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 41872-2022: Heat exchanger for refrigerating systems and heat pumps - Performance test and evaluation method based on three-field synergy of temperature, pressure and velocity fields---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. Heat exchanger for refrigerating systems and heat pumps -- Performance test and evaluation method based on three-field synergy of temperature, pressure and velocity fields ICS 27.200 CCSJ73 National Standards of People's Republic of China Heat exchangers for refrigeration systems and heat pumps The three fields of temperature, pressure and velocity are synergistic Performance testing and evaluation methods Published on 2022-10-12 2023-02-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Test Requirements 3 5 Evaluation method 4 Appendix A (Informative) Characterization Example of Three-Field Synergistic Flow Resistance and Heat Transfer Comprehensive Performance Evaluation of Heat Exchanger Appendix B (normative) Characterizing the basic elements of the three-field synergistic flow resistance and heat transfer comprehensive performance evaluation map of the heat exchanger 13 forewordThis 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. 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 by China Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Refrigeration and Air-conditioning Equipment (SAC/TC238). This document was drafted by. Xi'an Jiaotong University, Hefei General Machinery Research Institute Co., Ltd., Guangdong Midea HVAC Equipment Co., Ltd., Zhejiang Intel Technology Co., Ltd., Guangdong Fenix Energy Saving Equipment Co., Ltd., Shanghai University of Science and Technology, South China University of Technology, Shanghai Refrigeration and Air Conditioning Industry Association, Ningbo Aux Electric Co., Ltd., Guangdong New Energy Technology Development Co., Ltd., Binglun Environmental Technology Co., Ltd. Co., Ltd., Hefei General Electromechanical Products Testing Institute Co., Ltd., Hefei General Environmental Control Technology Co., Ltd. The main drafters of this document. He Yaling, Tao Wenquan, Zhang Xiuping, Zhang Mingsheng, Zhang Kai, Luo Bin, Fang Zhenjian, Liu Yuanhui, Zhang Hua, Liu Jinping, Shao Naiyu, Du Wenchao, Zhao Misheng, Zhang Chao, Li Zhiliang, Wang Rujin, Fan Jufang, Li Mingjia, Tang Songzhen, Tong Zixiang. Heat exchangers for refrigeration systems and heat pumps The three fields of temperature, pressure and velocity are synergistic Performance testing and evaluation methods1 ScopeThis document specifies the performance test and performance test of the temperature field, pressure field and velocity field of the fluid in the refrigeration system and heat pump heat exchanger. Evaluation method. This document is applicable to the evaluation of the overall performance of flow resistance and heat transfer of heat exchangers used in refrigeration systems and heat pumps, where at least one side is single-phase heat exchange.2 Normative referencesThe 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 10870-2014 Performance test method for vapor compression circulating chilled water (heat pump) units GB/T 23130-2008 Heat Exchangers for Room Air Conditioners GB/T 25862-2010 Coaxial casing heat exchanger for refrigeration and air conditioning JB/T 7249 Refrigeration Equipment Terminology3 Terms and DefinitionsThe terms and definitions defined in JB/T 7249 and the following terms and definitions apply to this document. 3.1 Minimum cross-sectional area Ac Along the flow direction, the area of the fluid in the heat exchanger at the minimum flow cross-section. Note. The unit is square meter (m2). 3.2 uc The flow velocity used to calculate the Reynolds number is taken as the average flow velocity of the fluid at the smallest cross-sectional area in the heat exchanger. Note. The unit is meters per second (m/s). 3.3 The overall length of the fluid flow direction of the compared side within the heat exchanger. Note. The unit is meters (m). ...... |
