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Tommaso Ferrarese - Carel Industries - SUPERMERCATI AD ALTA EFFICIENZA

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Tommaso Ferrarese - Carel Industries - SUPERMERCATI AD ALTA EFFICIENZA

  1. 1. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSHigh efficiency supermarkets:BLDC compressors and waterloopTommaso Ferrarese – HVAC/R Laboratory, Carel Industries S.p.A.Giacomo Bagarella – PhD Energetic Engineering, University of Padua
  2. 2. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSRefrigerant leakages and powerconsumption in supermarketsRefrigerationsystemLightingHVACMiscellaneous7%18%21%54%15%20%8%36%21%MT compressorsLT compressorsAircooled condensersDisplay case fans/lightsDefrost & anti-sweatheatersRefrigerant Charge3.5 ÷ 4 kg/kWRefrigerant leakages10% ÷ 15%
  3. 3. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSWaterloop solutionBLDC compressor onboard, inverter drivenCondenser and inverter electronics are cooled by waterElectronic expansion valveReverse cycle defrost availableInverter driven BLDCcompressor allows flexibility,high efficiency in part loadoperation and optimaltemperature controlNo need of 3phase powersupply for each cabinet. Heatproduced during defrost can berecovered by the water loopStand-alone cabinet
  4. 4. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSWaterloop solutionWaterloop plant
  5. 5. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSCharge and leakages reductionLeakage reduction:from 10%-15% to 1-2%Charge Reduction over 70%:From 3.5 ÷ 4 kg/kW to 1 kg/kW
  6. 6. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSEnergy efficiency In traditional supermarkets suction pressure setpoint depends from «worst»conditions: maximum cooling power demand A centralized system with floating suction can increase the setpoint when thecooling demand is lower, but it always depends on the «worst» unit
  7. 7. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSEnergy efficiency Each self contained cabinet can operate with the maximumevap T allowed When load ratio is less than 1 the inverter compressor reducesits speed and works with a higher Evap T than in traditionalsystems
  8. 8. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSCostsStand-alone units are more expensive than standard onesCooling devices installed on the waterloop are standardAC units, available on the market, reliable and operatingin more efficient conditionsCopper pipes are replaced by hydraulic pipesNo need of pipe insulationCharge reductionMore flexibility in plant architectureHigh reliabilty due to factory assembled unitsRunning costs reduced by higher efficiency and easymaintenance
  9. 9. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSMediumTempUnitsControlDevicesCpsCool.Cap.[kW]Low Temp UnitsControldevicesCpsCool.Cap. [kW]Vegetables 2 2 2 3780Frozenfood6 6 6 9500Dairy 6 6 6 20800 Cells 2 4 4 4200Meat 3 3 3 9700 Total 8 10 10 13700Fish 2 4 2 2780Comp.cool. cap.Evap T: -35°C Evap T: -10°CDeli 6 8 3 9080 Small 800 2200Cold rooms 7 7 4 13600 Medium 1300 3600Total 26 30 20 59740 Large 1700 4500Real supermarket plant
  10. 10. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSSupermarket simulationData AcquisitionEnergetic Model(Water-LoopSolution)RealSupermarketEnergetic Model(TraditionalSupermarket)Condensation: FixedEvaporation: FixedSimulationsEnergetic Model(AdvancedSupermarket)Energetic ModelR134a/CO2CascadeWeather Data(Berlin)Cooling LoadsCondensation: FloatingEvaporation: FloatingCondensation: FloatingEvaporation: FloatingEnergyAnalysisEnergeticModelModel ValidationSupermarketArea3000m2
  11. 11. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSSupermarket simulationMediumTemperatureCabinetsCoolingcapacity [W]LowTemperatureCabinetsCoolingcapacity [W]Vegetables 6 10000 Frozen food 24 35000Dairy 18 60000 Cells 6 20000Meat 8 26000 Total 30 55000Fish 6 8000Deli 18 26000Cold rooms 8 35000Total 64 165000MT/LTCompsMT/LT Cool.Capacity [kW]MT/LT ElectricPower [kW]MT/LT Evap T [kW]Cond T[°C]Waterloopsolution72/30 170/60 79/34 Variable/Variable 20TraditionalSupermarket6/3 200/64 87/53 -10/-35 33AdvancedSupermarket6/3 200/64 87/53 Variable/Variable VariableR134a/CO2Cascade7/3 270/78 100/22 Variable/Variable VariableReference
  12. 12. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSSupermarket simulationEnergy efficiency
  13. 13. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSSupermarket simulationEnergy efficiencyEnergy absorbed[kWh/year]Energy saved[kWh/year]Energy savingMoney saving[€/year] MINMoney saving[€/year] MAXWaterloopsolution BLDC418500 - - -W.loop fixedspeed Comp458200 39700 9% 5955 9925TraditionalSupermarket592400 173900 29% 26085 43475AdvancedSupermarket457000 38500 8% 5775 9625R134a/CO2Cascade466000 47500 10% 7125 11875
  14. 14. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSSupermarket simulationTEWICO2 indirect[t CO2/10 yrs]CO2 direct[t CO2/10 yrs]C02 End of Life[t CO2]TEWI[t CO2/ 10 year]Waterloopsolution4425 72 36 4533TraditionalSupermarket5469 19% 4560 98% 152 76% 10181 55%AdvancedSupermarket4656 5% 4560 98% 152 76% 9368 52%R134a/CO2Cascade4711 6% 936 92% 31 -15% 3764 20%
  15. 15. XV EUROPEAN CONFERENCE MILANO 7th-8thJUNE 2013 CSGLatest Technology in Refrigeration and Air ConditioningUnder the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERSThank youfor your attention!

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