ajeep_04a_energy_eficient_chiller - Mitsu.pdf
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ajeep_04a_energy_eficient_chiller - Mitsu.pdf
- 1. © 2012 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. Energy Efficient Chiller And Application
- 2. MHI Centrifugal Chiller Product Range
- 4. New Frontier In Compression Technology Lift
- 5. Two Stage Centrifugal Compressor Two compression processes take place simultaneously. Double Lift effect in enthalpy chart enhancing energy usages .
- 6. Chiller Compressor’ “Lift” Double Impellers Double impeller produces higher “Lift” for the same amount of energy used. Lift
- 7. Centrifugal Chiller Cycle Sub cool cycle High performance condenser High performance Evaporator High Efficiency Two-stage Compressor Two-stage Compression and Two-stage expansion cycle High Efficiency Two-stage cycle with Economizer and Sub-cooler Environmental Friendly Refrigerant HFC134a Condensator Sub-cooler Condenser Evaporator Economizer Motor Evaporator Single Stage Compressor cooling water inlet cooling water outlet chilled water inlet chilled water outlet cooling water inlet cooling water outlet chilled water inlet chilled water outlet Motor
- 8. Sub-Cooler Sub Cooler – The lower portion of the chillers condenser that further cools the saturated liquid refrigerant. Sub Cooler under chiller condenser Economizer Compressor Sub Cooler Sub Cooler is plate heat exchanger
- 9. Economizer In this case the refrigerant goes through two expansion devices. When the refrigerant goes through the first device, some of the refrigerant flashes, or becomes a gas. The flashed refrigerant is introduced to the compressor between the two stages. It has the effect of “cooling” the superheated refrigerant gas exiting the first stage. Economizer
- 10. COP Comparison of Refrigerant Cycle Single Stage Two-stage with Economizer Single Stage with Sub - cooler Two-stage with Economizer and Sub - cooler Two-stage compressor Motor Condenser Single stage compressor Evaporator Condenser Single stage compressor Evaporator Condenser Economizer Two-stage compressor Condenser Economizer Sub - cooler Sub - cooler Motor Motor Motor Pressure P Condensation Expansion Evaporator Compression Enthalpy h Pressure P Condensation Expansion Compression Pressure P Pressure P Economizer Economizer Compression Compression Expansion Expansion Compression Compression Expansion Expansion Condensation Condensation Sub - cool Sub - cool P-h Diagram System Theore- tical COP Cycle Evaporator Evaporator Evaporator Evaporator Evaporator Enthalpy h Enthalpy h Enthalpy h (note) Evaporating temperature : 4.2℃, Condensing temperature : 37.7℃, Sub - cool temperature : 4.0℃ 7.30 (100) 7.59 (104) 7.89 (108) 8.05 (110)
- 11. Durability And Robustness Design Hermetic Motor Increasing Gear First stage Impeller Inlet guide vane Diffuser vane Second stage Impeller Two stage Centrifugal Compressor Self Aligned High Speed and Low Speed Gear set.
- 12. Durability And Robustness Design Combined Angular Ball Bearing Loss minimization at bearing Durability design Endurance Test enhanced validity of design 50,000hour without overhaul
- 13. Enhanced Tubing Heat Exchanger High Performance Tubing for both Evaporator and Condenser Eliminate laminar flow effect, by creating turbulence flow inside and outside of heat exchange tubing. Increase contact surface area (infinity). Condenser – Needle Fine Tube Evaporator – Internal & External Cut
- 14. Mitsubishi ETI Series Variable Speed Drive Centrifugal Chiller Cooling Capacity Range From 150RT to 700RT Introducing HVAC Industries Innovative …….. Double Impeller with Built-In Inverter Starter Variable Speed Green Water Cooled Centrifugal Chiller
- 15. Mitsubishi AART Series Constant Speed Centrifugal Chiller Cooling Capacity Range From 230RT to 5000RT Double Impeller Constant Speed Green Water Cooled Centrifugal Chiller
- 16. Mitsubishi AART-I Series Variable Speed Centrifugal Chiller Double Impeller with Built In Inverter Starter Variable Speed Green Water Cooled Centrifugal Chiller Cooling Capacity Range From 230RT to 4000RT 4,000 RT
- 17. Mitsubishi AART-H Series Ice & Heat Recovery Centrifugal Chiller Ice Capacity Range From 190RT to 2100RT Heat Recovery Range From 270RT to 1550RT Double Impeller Constant Speed Green Water Cooled Centrifugal Ice or Heat Recovery Chiller
- 18. Mitsubishi AART-H Custom Made Centrifugal Chiller 3 Compressors Single Cooler Ice Chiller 3 Compressors Duel Coolers Ice Chiller