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Plant Optimization

Plant Optimization. Plant energy consumers. Plant energy consumers. Installation and Operating Reliability & Efficiency. Pump Energy Consumption. You pay for the weight of the water you move You pay for the friction of the water in the pipe You pay for overcoming gravity

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Plant Optimization

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  1. Plant Optimization

  2. Plant energy consumers

  3. Plant energy consumers Installation and Operating Reliability & Efficiency

  4. Pump Energy Consumption • You pay for the weight of the water you move • You pay for the friction of the water in the pipe • You pay for overcoming gravity • You can’t do much about gravity • You can minimize the tons of water • You can minimize the friction – especially the induced friction

  5. Chiller Energy Consumption • You pay for the tonnage • You pay for the lift • You pay for the heat transfer • A Chiller AFD can pay you dividends if you lower the lift • An AFD doesn’t care about the tonnage

  6. Tower Energy Consumption • You pay for the approach to wet bulb • You pay for the ∆T

  7. Plant energy consumers – induced friction

  8. Triple duty valve

  9. C h i l l e r # 2 C h i l l e r # 1 Plant LayoutVariable Flow - Decoupled Production Pressure Differential Controller or Transmitter Air Handling Units Bypass Line Distribution Variable-Speed Drive Control Valves

  10. C h i l l e r # 2 C h i l l e r # 1 Plant Layout Variable Flow - Decoupled Production Air Handling Units Bypass Line Distribution Variable-Speed Drive Control Valves Pressure Differential Transmitter

  11. With 3-way valves With bypass valves

  12. With 3-way valves With bypass valves • Saves Pump Horsepower • Keeps Chiller 2 off longer • No Low Delta T Syndrome – better chiller efficiencies

  13. C h i l l e r # 2 C h i l l e r # 1 What about the Primary Pumps? Production Air Handling Units Bypass Line Distribution Variable-Speed Drive Control Valves

  14. C h i l l e r # 2 C h i l l e r # 1 What about the Primary Pumps? VFD VFD Production Air Handling Units Bypass Line Distribution Variable-Speed Drive Control Valves

  15. The chiller (check with your chiller representative for your specific application) can usually accept flows as low as 1.5 gallon per ton without strain. Many chillers can get down to 1 gallon per ton. This particular chiller (700 gpm design) easily accepts the 400 gpm pump minimum. The Primary CHW Pumps should track the Secondary pump The de-coupler should have zero flow (zero waste)

  16. Condenser water pumps and tower control • As CW flow goes down, Tower fan speed goes up • As Tower fan speed goes down, chiller consumption goes up • How do we save?

  17. free discharge fan chilled water pump(DP at end of loop) condenser waterpump (stopped at875 gpm) chiller w/low lift Various system componentsEnergy Use 100 80 60 energy use, % 40 20 0 20 40 60 80 100 load, %

  18. Installation and Operating Reliability & Efficiency

  19. Thank You! Questions?

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