Hands-On Use System-level analysis of an air-cooled cabinetAir-Cooled CabinetAir-Cooled Cabinet – Case 1Slide 4Air-Cooled Cabinet – Variations of Case 1Air-Cooled Cabinet – Case 2Air-Cooled Cabinet – Case 3System-level analysis of an liquid-cooling systemProprietary Material – Innovative Research, Inc.Hands-On UseSystem-level analysis of an air-cooled cabinet Model will be set up for successively complex versions of an air-cooled cabinetThe sequence of systems to be analyzed is as follows:Case 1 – Open Cabinet, Identical Cards Case 2 - Open Cabinet, Dissimilar Cards Case 3 – Closed Cabinet with Multiple Racks and a Heat ExchangerFor each case, we will explore effects of design changes and operating conditionsProprietary Material – Innovative Research, Inc.Air-Cooled CabinetEMI Screen(60% Open0.15”dia Holes)Air Filter(UAF Quadrafoam 25 PPI 0.25” Thick)Card Cage (10 Front and 10 Back, 50W Cards7”(W)x9”(H), 1.7” Pitch, 503”Fan Tray (3 fans)4”Proprietary Material – Innovative Research, Inc.Air-Cooled Cabinet – Case 1Physical SystemFan-cooled cabinet with air inflow at the front and outflow at the back for removal of heat dissipated from a centrally located card cage.Cabinet Geometry - 17”(L)x14”(W)x16”(H) Inflow - 17”(W)x4”(H) opening on the front face with an EMI screenAn air filter made by Universal Air Filter (25 PPI 0.25 inch thick) placed just after the screen Card Geometry•10 cards in the front and back each with 50 W heat dissipation•Each card is 7”(W)x9”(H)x0.125”(Thick) •Card pitch is 1.7”•Electronic components are 0.75”(L)x0.75”(W)x0.25”(H)•EMI screens at the bottom and top of the card cageProprietary Material – Innovative Research, Inc.Air-Cooled Cabinet – Case 1Physical SystemFan tray located in the back of the cabinet at the top•Each fan is 3” in diameter•Each fan provides maximum head of 0.5” water and a maximum of 100 CFMOutflow over the cross-section of the fans through the EMI screensEach EMI screen is 60% open and has holes of 0.15” diameter File name – Case1.mfpProprietary Material – Innovative Research, Inc.Air-Cooled Cabinet – Variations of Case 1Effect of filter cloggingIncrease dust loading to 0.3 g/in2 from 0 g/in2File name – Case1(Dirty Filter).mfpEffect of Higher ElevationChange elevation to 5000 m in the Ambient Conditions dialogFile name – Case1(Higher Elevation).mfpEffect of Larger ExitExit area is 17”x3” instead of 9”x3” in cross-sectionAdd an expansion and a 2” gap between the fans and the exitFile name – Case1(Larger Exit).mfpProprietary Material – Innovative Research, Inc.Air-Cooled Cabinet – Case 2Dissimilar CardsFront cards – 6”(W)x9”(L), Component height – 0.25”, Heat Dissipation 40 W dissipationBack cards – 8”(W)x9”(L), Component height – 1”, Heat Dissipation 60 WFile name – Case2.mfpVariation of Case 2 – Addition of a Flow-Balancing ScreenAdd a screen with 60% open area and holes of 0.15” diameterFile name – Case2(Balancing Screen).mfpProprietary Material – Innovative Research, Inc.Air-Cooled Cabinet – Case 3Closed CabinetTwo sets of card cages6” clearance at the front and backWater-cooled heat exchanger (Lytron 6320) with 1 gal/min flow of waterFile name – Case3.mfpVariation of Case 3 Higher flow rate of cooling water (5 gal/min) - Case3(Higher Water Flow).mfpUpper fan tray failed – Case3(Failed Fan Tray).mfpProprietary Material – Innovative Research, Inc.System-level analysis of an liquid-cooling system Analysis of a liquid cooling system is performed for a specified flow rate entering the system.Currently the orifices in the sub-branches in the last manifold have different opening areas so as to achieve uniform flow. If all orifices in the sub-branches in the last manifold are made identical, then the flow will be very nonuniform. This can be done by setting all orifices to have an area of 0.1 in2 and perimeter of 1.121 in. The model is in the file