G.15 Liquid cooling adhoc IBM, Intel, HP, UL Will Susiene – Intel Jeff Pasternak – Intel Mariel Acosta-geraldino – IBM Tom Burke – UL Glen Lesmeister – HP Extended resources -ASHRAE liaison TC9.9 Michael Patterson – Intel Retired Roger Schmidt – IBM Retired Vibration Budy Notohardjono - IBM IBM, Intel, HP, UL

G.15 Pressurized liquid filled components

Outline of changes New definitions, Self contained vs Modular 4.1.8- Removal of 1L . G.15.1 => would act as the general sub-clause that applies to all equipment with liquid cooling. Directs self contained equipment to testing criteria in 15.2 or modular equipment to 15.3. Offers evaluations to 61010 as acceptable. G.15.2 => will guide to requirements for self-contained. Editorial change in the title => Currently in 3rd edition- Not under the scope of this adhoc. G.15.2.8 Adding a subsection so there is a compliance criteria for each section. G.15.3=> New proposal that will apply to modular. G.15.3.1 Hydrostatic pressure test: Hydrostatic Pressure Limits to 1.5x or 345 kPa (50 psig) whichever is greater for use on modular LFC equipment Notice: No vibration test criteria for high end, see rationale proposal G.15.3.2 Creep Resistance Test, G.15.3.4 Tubing and fittings compatibility test, G.15.3.5 Thermal cycling test, G.15.3.6 Force test: the test requirements are the same, BUT we have added editorial changes that will allow for testing to be accepted if the testing is performed at component level vs final integration. Our intent is to be able to ask manufacturers to certify to g.15. When integrators pick up certified components, then testing would not be required at the end product. G.15.3.7 Compliance criteria for 15.3

Annex: Historical background LFC

Liquid filled heat sinks Published by Lal Bahra (Dell) on May 29, 2007 List of references used to build the standard.

(Editorial changes to include the testing below Annex V10, Nov 2007

Evolution Change in Hydrostatic pressure from 5x/3x to 3x/2x Modification suggested April 20, 2004 by Roose, 108HBSDT San Jose. Rationale Get standard IEC 62368-1 more aligned with standard IEC 61010-1 ed.3 and the European pressure directive. According to IEC 61010-1 ed. 3: The test pressure is the maximum pressure multiplied by a factor of 1,5 for testing against leakage and by factor 2,0 for testing against burst. The maximum pressure value is taking into account any single fault condition. According to the European pressure directive: For pressure vessels, the hydrostatic test pressure must be no less than corresponding to the maximum loading to which the pressure equipment may be subject in service taking into account its maximum allowable pressure and its maximum allowable temperature, multiplied by the coefficient 1,25, or the maximum allowable pressure multiplied by the coefficient 1,43, whichever is the greater.