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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 45486-2025: Ships and marine technology - Ballast water management systems (BWMS) - Computational physical modelling and calculations on scaling of UV reactors Status: Valid
Basic dataStandard ID: GB/T 45486-2025 (GB/T45486-2025)Description (Translated English): Ships and marine technology - Ballast water management systems (BWMS) - Computational physical modelling and calculations on scaling of UV reactors Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: U47 Classification of International Standard: 47.020.99 Word Count Estimation: 22,219 Date of Issue: 2025-03-28 Date of Implementation: 10/1/2025 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 45486-2025: Ships and marine technology - Ballast water management systems (BWMS) - Computational physical modelling and calculations on scaling of UV reactors---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. ICS 47.020.99 CCSU47 National Standard of the People's Republic of China Ships and offshore technology Ballast water management systems (BWMS) Numerical simulation and calculation of scaling of UV reactor (ISO 23152.2021,IDT) Released on 2025-03-28 2025-07-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of contentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General Requirements 5 4.1 General requirements 5 4.2 Modeling Best Practices 6 5 Modeling and calculation 6 5.1 General requirements 6 5.2 Geometric model 6 5.3 Turbulence Model 6 5.4 Radiation Model 6 5.5 Calculation of UV dose 7 5.6 Scaling Procedure 7 6 Scaling criteria10 Appendix A (Informative) RED Calculation 11 A.1 Background 11 A.2 Equivalent reducing dose 11 Appendix B (Normative) Validation of the Model Using Empirical Data 13 B.1 General requirements 13 B.2 Model Function Confirmation 13 B.3 Empirical test data 13 B.4 Empirical Data Verification 13 B.5 Acceptable Justification for Scaling Performance Predictions 14 B.6 Additional verification criteria 14 Reference 15ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is equivalent to ISO 23152.2021 "Ships and marine technology - Ballast water management systems (BWMS) - Proportion of UV reactors Scaling Numerical Simulation and Computation. The following minimal editorial changes were made to this document. --- Added the unit expression of rated processing capacity (see 3.28). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Technical Committee for Standardization of Marine Machinery (SAC/TC137). This document was drafted by. Jiujiang Precision Testing Technology Research Institute, China Shipbuilding Industry Corporation Comprehensive Technology and Economic Research Institute, Jiangsu Aviation Vocational and Technical College of Shipping, Weihai COSCO Shipping Heavy Industry Technology Co., Ltd., Jimei University, China Merchants Jinling Shipbuilding (Weihai) Co., Ltd., Changzhou Guang Tai Electronic Technology Co., Ltd., Shenzhen Jiali Electric Technology Co., Ltd., Guangdong Radio and Television Measurement and Testing Group Co., Ltd., Chongqing Ruilang Electric Co., Ltd., Qingdao Maritime Comprehensive Test Field Co., Ltd., and Fujian Shipbuilding and Transportation Vocational College. The main drafters of this document are. Dong Taoyun, Yu Jianghua, Liu Sheng, Wei Huaxing, An Liang, Wang Qi, Ji Yu, Wang Jian, Li Shengjie, Zhan Shijie, Zhang Weidong, Wu Defeng, Shang Chenggang, Ma Weifeng, Liu Yingquan, Xu Hongyan, Jiang Haifeng, Li Huan, Ming Zhimao, Zhao Kelun, Wang Jian, Chen Hongyu, Wang Xunlong, Hou Jiayi, Weng Guoling. Ships and offshore technology Ballast water management systems (BWMS) Numerical simulation and calculation of scaling of UV reactor1 ScopeThis document specifies a methodology for the computational modelling of ultraviolet (UV) reactors designed for ultraviolet ballast water management systems (UVBWMS). Computational modeling was used to calculate the UV equivalent reducing dose (RED) and to compare the calculated RED of the scaled reactor to that of the basic reactor. The RED is determined by the dose response of a given microorganism. Note. The International Maritime Organization (IMO) requires validation of calculation models. Using computational models to simulate physical UV reactors requires validation of the model (i.e., that the model operates as expected and reflects the correct physical constraints). The model developed based on this document is intended to validate simulated but not tested scaling The simulation was validated based on test data of a base model UV reactor in the product line. The entire UVBWMS usually includes other processing devices, such as filters. This document does not consider the impact of external subsystem performance changes on the entire Impact of BWMS.2 Normative referencesThis document has no normative references.3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 A repository of cell lines and cultured microorganisms used for research. 3.2 Base model basemodel A UV Ballast Water Management System (UVBWMS) as defined in the BWMS Code that has successfully completed onshore testing (3.30) Model. Note. Base models typically have a low-range TRC (3.28). 3.3 Basereactor UV reactor (3.41) of the basic model (3.2). 3.4 Biodosimetry The biological response was measured as a proxy for the UV dose (3.34). 3.5 Numerical methods and algorithms for solving and analyzing problems involving fluid flows. ...... |
