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EWTP-MBYNN

EWTP-MBYNN. Air-cooled Heat Recovery. EWTP-MBYNN. Air-cooled Heat Recovery. Contents. Concept Equipment Overview Capacity Range Operation Range Specifications Practical Examples & Reference. Return. Return. Heating Load. Cooling Load. 12 0 C. 40 0 C. 45 0 C. 7 0 C.

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EWTP-MBYNN

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  1. EWTP-MBYNN Air-cooled Heat Recovery Applied Systems Sales

  2. EWTP-MBYNN Air-cooled Heat Recovery Contents Concept Equipment Overview Capacity Range Operation Range Specifications Practical Examples & Reference Applied Systems Sales

  3. Return Return Heating Load Cooling Load 120C 400C 450C 70C Supply Supply A. Heat Recovery Concept • Criteria • Hot water demand must be great enough to justify cost • High enough useful waste heat temperature Applied Systems Sales

  4. Single Circuit (1 Compressor) Double Circuit (2 Compressors) B. Equipment Overview Heat Recovery Chillers: EWTP400-540MBYNN EWTP110-160MBYNN EWTP200-340MBYNN • Daikin stepless single screw compressor • All components optimized for use with R-407C • Air heat exchanger: Cross fin coils / Hi-X tubes and PE waffle louvre fins • Water heat exchanger: Brazed plate evaporator & heat recovery exchanger • Double refrigeration circuit (from 400kW) Applied Systems Sales

  5. C. Capacity Range EWTP-MBYNN Model 110 140 160 200 280 340 400 460 540 CC kW 107 138 158 191 274 335 379 449 520 CCHR kW 98 126 144 171 251 311 337 401 465 HCHR kW 116 148 176 208 301 377 407 434 441 HP 40 50 60 80 100 120 140 160 200 Single circuit (1 compressor) Double circuit (2 compressors) Applied Systems Sales

  6. D. Operation Range - Cooling Ambient (°C ) 50 LWE to -10°C 43 40 39 36 30 20 Continuous Operation Area Pull-Down Area On special request 10 0 Low Ambient to -15°C • Protect against freezing by: • Evaporator heater tape (std) • Glycol -10 -15 -20 Glycol Water LWE (°C) -30 -5 4 16 26 -20 30 -10 0 10 20 Applied Systems Sales

  7. Daikin Stepless Single Screw Compressor 2pcs Brazed Plate Heat Exchangers pCO2 Control Platform E. Specifications * See EWAP~MBY Presentation Applied Systems Sales

  8. Condenser HighPressure 45oC 60oC Hot Water Supply Expansion Valve 40oC 50oC Compressor Evaporator Useful Heat Compressor Discharge Gas LowPressure 7oC 12oC • Partial Heat Recovery • (Desuperheater) • 25 to 35% Heat Recovery • High LWE upto 600C E. Specifications – Heat Recovery Principle OR • Total Heat Recovery • 65 to 85% Heat Recovery • Lower LWE of 450C Applied Systems Sales

  9. E. Specifications -> Construction From Condenser Economiser To Condenser Compressor Discharge Evaporator Daikin Single Screw Compressor Heat Recovery BPHE Applied Systems Sales

  10. E. Specifications - % Heat Recovery Applied Systems Sales

  11. Hot water & condensing temperature DAIKIN Heat Recovery Chiller Optimized condensing temperature T (°C) Conventional Heat Recovery Fixed condensing temperature Set point Conventional Heat Recovery Uncontrolled Hot water temp DAIKIN Heat Recovery chiller Controlled Hot water temp t 0 t 1 t 2 t 3 t 4 t 5 Power input Conventional Heat Recovery DAIKIN Heat Recovery Chiller PI (kW) Saved Energy t 0 t 1 t 2 t 3 t 4 t 5 E. Specifications – Heat Recovery Principle Applied Systems Sales

  12. Ambient temp. (°C) 15 20 25 30 35 40 0 -1 -2 -3 -4 Sound power level (dBA) E. Specifications -> Inverter Fans Standard with Heat Recovery units - Stable HP control, better part load efficiency - Smooth operation, better colour of sound - Linear sound reduction in function of ambient Sound reduction in function of ambient temperature Further Reduction of - 3dBa Applied Systems Sales

  13. Feedback Additional Heating Source OR Gas, Oil, … Electricity Self adaptive control to run at optimized cooling capacity / Heat recovery ratio E. Specifications – Control Possibilities Remote Mode Switch Enable / Disable PCO² Contoller Heat recovery Temperature Sensor L N A1 A2 Pump Contact Pump Cooling The Load Applied Systems Sales

  14. Optimized balancing between CC & HR capacity E. Specifications – Optimised Control Capacity kW HR Capacity CC 19 Bar 22 Bar High Pressure Bar Applied Systems Sales

  15. E. Specifications – Installation Hot Supply • Boiler • Used during peak & off-peak periods • Maintains tank temperature Cold Supply City Mains Stratified Hot Water Storage Twin Pump Set In-Line Boiler • OPHR • Used during off-peak • Assists inline heater Applied Systems Sales

  16. E. Specifications – DICN Control • Erratic Control on LWE • Loss of performance at terminals • No plant optimization to meet load • No defined lead or standby unit • No defined unit running hours Without Communication = Multiple Chillers HR Chiller can be given priority -> increased reliability at part load LOAD LOAD 600C 120C 120C 120C HR Chiller 500C 70C 70C 70C Daikin’s Solution = DICN = Applied Systems Sales

  17. Example: EWTP140MBYNN At nominal conditions: 7oC and 12oC chilled water & 35°C ambient • Cooling mode  fans at full speed  min condensing pressure Cooling Capacity 138kW Power Input 54kW EER 2.56 • Heat recovery mode  increased condensing  max heating capacity Hot Water 45oC Heating Capacity 148kW Cooling Capacity 126kW Power Input 47,8kW Hot Water 60oC Heating Capacity 60,2kW Cooling Capacity 121kW Power Input 51kW F. Practical Examples COP = 3.55 %HR = 35% COP = 5.73 %HR = 85% Applied Systems Sales

  18. F. Practical Examples - Simple Payback • Based on: • Energy Consumption of 0,15€ per kWhr • 4hrs operation at 100% -> assume multiple chiller installation Our Findings • Avg Payback of option OPHR: • Hot Water 40/50 42 Days or 8 weeks • Hot Water 50/60 102 Days or 20 weeks • Avg Payback of Chiller + OPHR: • Hot Water 40/50 1 Year • Hot Water 50/60 2,5 Years Exceptional Investment for Customer! Applied Systems Sales

  19. New Zealand Application Mudhouse-River Co-operative Affiliate: Daikin Australia Installer: Martella 3 x EUWA200MZY 1 EUWA200MZY unit produces 15,000,000 l/yr Cooling Mode Total Cooling = 1.5MW HR Mode Total Cooling = 1.4MW Total HR = 0.8MW Conditions LWE = -4oC LWC = 52-55oC Applied Systems Sales

  20. 1. R-407C: the good choice ! 2. High specifications 3. High Quality Components 4. Useful Options Large Air-Cooled Heat Recovery Chillers EWTP110~540MBY Applied Systems Sales

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