新的唾手可得的成果：利用冷水机组废热发电降低PUE值.pdf

1、OCP EMEA Summit 29 April|Dublin,IrelandNate Turner,CEOHayzel“New low hanging fruit.”Reducing PUE by making power from chiller waste heat52MM Chillers today,growing at 9%/yearChillers are warming the world 100+GW potential low-cost carbon free electricityConsuming 10%global electricity production Emi

2、tting 1.1 GT of CO2 per yearAI+air cooled chiller designs used at data centers are driving cooling growth.Cooling requires tremendous energyCooling=25%of global electric use in 2050.Data centers are driving cooling growth.20%of Irish power is used in data centers.Global DC power will grow 168%by 203

3、0.AI needs more power and cooling.Yet,PUE goals keep going down.What is the plan?Low cost,carbon-free energy is always right around the cornerFuture cooling demand will be fine if we just realize our potentialNuclear fusionGeothermalGlobal offshore windEtc.Can we really wait?What options do we have

4、now?Nuclear FusionGeothermalRethinking Cooling-A hidden opportunity.Cooling is 15-30%of DC demand.Chip cooling is changing rapidly.Chillers are not.Cooling occurs when an expansion valve reduces the pressure of the refrigerant.Why not expand with Turbines?A turbine could be used to reduce pressure a

5、nd generate carbon-free electricity.Generating electricity consumes heat,making cooling more efficient.Cooling ProcessAir-cooled ChillerExpansion of refrigerant wastes energy 25%lossWhy arent turbines used in cooling?Presence of both gas and liquid presents challenges.Phase separation causes:Frictio

6、nLow fluid velocitiesFilms on bladesMechanical FailureThe Liquid Vapor Expander(LVE)=low hanging fruit Two-phase turbine.LVE initially invented by a team of Caltech engineers.Proven technology in 100+systems in LNG,Hydrogen,Geothermal,and o