Presentation on theme: "ESS Cooling and Heat Recovery system Thomas Hjern"— Presentation transcript:
1 ESS Cooling and Heat Recovery system Thomas Hjern Design Leader Process systemsConventional FacilitiesEuCARD-2 Lund April 28, 2014
2 Overview System design Lessons learned – so far General energy design conceptsESS design basis for heat recoveryCooling water distribution systemHeat sinks for heat recoveryHeat recovery systemLessons learned – so far
3 General energy design concepts Design for low energy consumption“Protect” high temperaturesLook for existing and potential heat sinks
4 ESS design basis for heat recovery Heat Recovery included from start of design!All energy applications designed for heat recoveryUse highest possible cooling water temperatureGive highest possible return temperatureLow pressure dropThree cooling water temperature levelsLow: 10°C = lowest required temperatureHigh: 50°C = lowest temperature without heat pumpsMid: 25°C = “optimum” mid-temperature
5 Central Utilities Building (CUB) Cooling water distribution systemSite widedistributionCW return<30⁰C30-50⁰CCW supply50⁰CPC25⁰C10⁰CCooling&Heat Recovery>50⁰CCentral Utilities Building (CUB)Cooling loadsAll supplies9 bar g!If>50°CIf30-50°CIf>50°CAll returns6 bar g!
6 Heat sinks for heat recovery Existing municipal District Heating (DH)Warm supply 80°CCold return 45°CNew Low Temperature District Heating (LTDH)Warm supply 55°CCold return 25°CESS internal district heatingScience Village?Greenhouses?New municipal areas?
8 Think more industry – Less laboratory! Leasons learned – so farLarge potential for energy optimization in design stage“Half cost, double profit” compared to later modificationsIntegrated design from “klystron to district heating”Machine designers and scientist not used to consider heat recoveryEnergy management must be a top management priorityAvoid subsystemsImportant to have a Life Cycle Cost focusProject management must focus on operating costThink more industry – Less laboratory!