GB/T 14812-2008 English PDFUS$229.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 14812-2008: Testing method for heat transfer performance of heat pipes Status: Valid GB/T 14812: Historical versions
Basic dataStandard ID: GB/T 14812-2008 (GB/T14812-2008)Description (Translated English): Testing method for heat transfer performance of heat pipes Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J75 Classification of International Standard: 27.060.30 Word Count Estimation: 10,140 Date of Issue: 6/26/2008 Date of Implementation: 1/1/2009 Older Standard (superseded by this standard): GB/T 14812-1993 Quoted Standard: GB/T 14811 Regulation (derived from): Announcement of Newly Approved National Standards No. 11 of 2008 (No. 124 overall) 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 heat pipe heat transfer performance of the test specimen for its preparation, or method requires test equipment and instrumentation, testing environmental conditions, tests and test results of the calculation. This Standard is applicable to all kinds of tubular gravity heat pipe, vapor chamber heat pipe, there are die tubular heat pipes, loop heat pipes and heat transfer performance test capillary pump loop, other types of heat pipes can be implemented by reference. GB/T 14812-2008: Testing method for heat transfer performance of heat pipes---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.Testing method for heat transfer performance of heat pipes ICS 27.060.30 J75 National Standards of People's Republic of China Replacing GB/T 14812-1993 Heat pipe heat transfer performance test method Posted 2008-06-26 2009-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard replaces GB/T 14812-1993 "gravity heat pipe heat transfer performance test method." This standard and GB/T 14812-1993 compared to the main changes are as follows. --- The original standard name "gravity heat transfer performance test method" was changed to "heat transfer performance test methods"; Scope --- standard from the "thermosyphon" extended to "the gravity of the tubular heat pipe, vapor chamber heat pipe, tubular heat pipes have die, Loop heat pipe and capillary pump loop "; --- Increasing the evaporator (district, sections) resistance, a condenser (district, sections) and thermal resistance test and calculation method of the total thermal resistance; --- Original standard "gravity heat pipe" to "the gravity of the tubular heat pipe"; --- Extended gravity heat pipe specimen lengths range, that increases the length of 0.5m and 5m less than the heat pipe related content; --- Increasing the heat pipe filling volume error range requirements; --- Increased test requirements of environmental conditions; --- Increased content cryogenic cooling medium heat pipe test bed; --- Heat transfer performance test record sheet made adaptations, and given in appendix form. Appendix A of this standard is an informative annex. The standard proposed by China Aerospace Science and Technology Corporation. The standard by the China Aerospace Science and Technology Corporation. This standard drafting unit. China Academy of Space Technology Master unit, the Institute of Engineering Thermophysics. The main drafters of this standard. Miaojian India, Shaoxing Guo, Houzeng Qi, Qu Wei, Lu Wei. This standard replaces the standards previously issued as follows. --- GB/T 14812-1993. Heat pipe heat transfer performance test method1 ScopeThis standard specifies the test piece for heat pipe heat transfer performance and test preparation, test equipment and instrumentation, testing environmental conditions, testing and commissioning Requirements or test results of the calculation method. This standard applies to all kinds of tubular gravity heat pipe, vapor chamber heat pipe, tubular die has heat pipes, loop heat pipe heat transfer and capillary pump loop Performance test, other types of heat pipes can be implemented by reference.2 Normative referencesThe 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 14811 term heat pipe3 Terms and DefinitionsTerms and definitions GB/T 14811 apply to this standard established.4 and specimen preparationSelect 4.1 specimen 4.1.1 Gravity heat pipes and tubular Tubular die of heat pipes 4.1.1.1 specimens should be used with the same kind of heat pipe diameter, the same material, the same working fluid and the same production process. 4.1.1.2 Specimen length based on the actual length of the heat pipe selection, see Table 1. 4.1.1.3 filling volume error range is typically ± 5%. 4.1.1.4 Tubular die straightness heat pipe specimen should be less than 0.5mm/m, total length of the heat pipe straightness should be less than 1mm. Table 1 Specimen heat pipe length in meters The actual length of the test piece heat pipe length specimen adiabatic section (region) minimum length ≤0.5 and the heat pipe is not the same as the actual length of less than one-third the length of the test piece > 0.5 1.5 1.0 0.3 > 1.5 to 3.0 2.0 0.5 > 3.0 to 5.0 4.0 0.7 > 5.0 5.0 1.0 4.1.2 vapor chamber heat pipe 4.1.2.1 specimens should be used with the same kind of heat pipe design structure and size, same material, same as the working fluid and the same production Process. 4.1.2.2 filling volume error range is typically ± 5%. 4.1.3 loop heat pipe and capillary pumped loop 4.1.3.1 specimens should be used with the same kind of loop heat pipe or a capillary pumped loop evaporator structure and size, the same structure and ulnar accumulator Inch, the same structure and size of the condenser, and the endotracheal tube same cross-sectional size, same material, same as the working fluid and the same production ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 14812-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 14812-2008_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 14812-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 14812-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
