Downloaded 431 times
![113
[ Custom Home ]!](https://image.slidesharecdn.com/introtovrf2-160817052338/85/Introduction-to-VRF-113-320.jpg)
Uploaded byJohn Chavez
Introduction to VRF
The document provides an overview of Variable Refrigerant Flow (VRF) technology, highlighting its components, features, and applications in HVAC systems. John Chavez, a mechanical contractor with extensive experience, discusses the efficiency and design flexibility of VRF systems compared to traditional HVAC solutions. It emphasizes benefits such as energy efficiency, personalized control, and reduced maintenance requirements.
More Related Content
Introduction to VRF
- 1.
- 2. 2 John Chavez! Gunder &Associates, LLC! SELLING AND APPLYING VRF TECHNOLOGY
- 3. Began my careerin 1986! About me 24 years as a Mechanical Contractor! NATE Certified! Mini-Split Experience since 1995! VRF Experience since 2007! Currently: Technical Sales and Support!
- 4. My Customers are:! EndUsers and Building Owners Contractors Distributors Mechanical Engineers Architects Factory Sales Personnel About me
- 5. 5 Todays Topics ! !!1. What is VRF Technology?! ! ! !2. What are the Key System Features?! ! ! !3. How Do VRF Systems Work?! ! ! !4. Review of System Components! ! ! !5. Applications and Design! ! ! !6. Service and Maintenance!
- 6. 6 Introduction to VRF? VARIABLEREFRIGERANT FLOW
- 7.
- 8.
- 9. 9 not your typicalheat pump!
- 10.
- 11. 11 First Installation was32 Years Ago! >Two Million Installations! World Wide!
- 12. 12 Chapter 18. VariableRefrigerant Flow Proven Technology
- 13.
- 14.
- 15.
- 16. 16 What is VRF? Asystem of singular or modular heat pumps ! and indoor fan coils that are connected ! by a common system control and ! a common set of refrigerant piping.! !
- 17. 17 What is VRF? Asystem of singular or modular heat pumps ! and indoor fan coils that are connected ! by a common system control and ! a common set of refrigerant piping.! !
- 18. 18 What is VRF? Asystem of singular or modular heat pumps ! and indoor fan coils that are connected ! by a common system control and ! a common set of refrigerant piping.! !
- 19. 19 The refrigerant ispassed through a series of ! fan coils by means of variable speed compressors and metered by an ! electronic expansion valve (EEV) that ! regulates refrigerant flow to ! accommodate the comfort set point ! for individual fan coils and zones! What is VRF?
- 20. 20 ! The variable speedcompressor increases! or decreases the system capacity to ! satisfy the individual load requirements! What is VRF?
- 21. 21 ! The variable speedcompressor increases! or decreases the system capacity to ! satisfy the individual load requirements! What is VRF? Personalized zoned comfort control
- 22. 22 ! The software programmingin the outdoor unit continually scans about 250 data points to! meet specific tolerances in target temperatures and pressures.! What is VRF? the software is a conductor in a sophisticated symphony
- 23. 23 Heat Pump vs. Heat Pump with Heat Recovery
- 24. 24 Heat Pump vs. Heat Pump with Heat Recovery
- 25.
- 26.
- 27.
- 28. 28 Heat Recovery Simultaneous Heatingand Cooling
- 29. 29 Simultaneous Heating andCooling Heat Recovery
- 30. 30 Simultaneous Heating andCooling Heat Recovery
- 31. 31 Common Network Refrigerant Circuitand Control Communication Buss
- 32. 32 What are theKey Features?
- 33. 33 Mix and MatchIndoor Units! Inverter Driven Scroll Compressors! Up to 150% Connected Capacity!
- 34. 34 Flexibility in Design! ZonedSpace Control! Simultaneous Heating and Cooling!
- 35. 35 Two or ThreePipe System! Two Wire DDC Network! Integrated Controls Network! BACnet and LonWorks!
- 36.
- 37.
- 38. 38 Flexible Piping Design 3280FT 295 FT 49 FT 295 FT 540 FT
- 39.
- 40. 80 Tons Economyof Scale
- 41. Economy of Scale Fitsinto a Six Person Elevator
- 42. Air 30” Diameter Ductwork Water 2 1/2”Iron Pipe 2” Iron Pipe Refrigerant R410A 1 1/8” Copper Pipe Space required to deliver 20 tons of cooling Economy of Scale
- 43. Air .3 Watts/kg Water 5.8 Watts/kg RefrigerantR410A 57 Watts/kg Economy of Scale
- 44. Air .3 Watts/kg Water 5.8 Watts/kg RefrigerantR410A 57 Watts/kg Economy of Scale Transporting expensively generated conditioned air Is probably not the best method to heat and cool a building Refrigerant has 10x the heat transfer capacity of chilled water and 190x that of air
- 45.
- 46.
- 47. Low Sound Rating VRFHeat Pump VRF Indoor Units
- 48. 48 System AutomaticallyMatches the Zone Load Adjusts the Flow of Refrigerant and Energy Adjusts the Compressor Speed and Fan Speed Improves Temperature Control Energy Efficient
- 49. 49 off the chartsenergy efficiency when in part load conditions Inverter driven compressor matches compressor speed to meet the full or part load demand soft starts no lock rotor amps
- 50. 50 allows for precisetemperature and humidity control
- 51. Room Temperature Set Point 75F 60Hz Compressor 0Hz 150Hz 30Hz Roomtemperature is steady. High rotation speed up to 120Hz Keeps rotation speed low after temperature stabilizes. adjusts rotation speed precisely keeps steady space temperature 80F ON Very Efficient Comfortable!Very fast! Load Matching Refrigerant Flow “soft start” Low Current at start
- 52.
- 53.
- 54.
- 55. Total Building FirstCosts
- 56. Typical HVAC EfficiencyRatings rating systems are based at part load capacity • IEER – Integrated Energy Efficiency Rating = Took the place of IPLV, is used for VRF product, and is explained in detail on the next slide • SCHE – Simultaneous Cooling & Heating Efficiency = the efficiency of VRF Heat Recovery at simultaneous 50% heating & 50% cooling
- 57. Schematic Design PhaseSystem Benefits Federal Guidelines-AHRI Standard 1230 !Establishes Testing Procedures" " " " ! " " !VRF Efficiency Database " " " ! " " !Part-Load Efficiencies" " " ! " "
- 58.
- 59. 59 If installed correctly,! VRFsystems are bullet proof.! ! -Large Texas Based Commercial Contractor! “ ” .05% (Five Hundredths of One Percent) Warranty Return Reliability
- 60.
- 61. Lower Life Cycle thecost of an hvac system is about more than the cost of design, equipment and installation. you need to consider operation, service, maintenance and replacement in the total cost equation. VRF zoning systems are more efficient, easier to design, takes less time to install and require significantly less maintenance than conventional hvac systems.
- 62. 62 How Do VRFSystems Work?
- 63.
- 65. LEV Coil Inet Coil Outlet Constantlymonitoring to keep a target Superheat or Subcooling Temperature Return Air Stream Sensor SMART COIL or Room Space Sensor
- 66. LEV Coil Inlet Coil Outlet Constantlymonitoring to keep a TARGET Superheat or Subcooling Temperature Return Air Stream Sensor or Room Space Sensor SMART COIL
- 67.
- 68.
- 70. 70 Two vs ThreePipe Heat Recovery Systems Inverter+Fixed or Inverter Only Service Access to Components Controls Network Piping Rules Programming Logic DIFFERENCES IN VRF SYSTEMS
- 71. Capacities at LowAmbient Conditions Defrost Strategy Oil Management Customer Support/Training Service Software Tools Selection Software Tools Information Available to the Public DIFFERENCES IN VRF SYSTEMS
- 72. 72 Review of SystemComponents Air and Water Source Heat Pumps DOAS ERV Indoor Fan Coils Zone Control Central Control
- 73. 73 Air and WaterSource Heat Pumps 94 Models
- 74. 74 Heat Recovery ! HeatPump with Branch Controller! 6~28 Tons! 208~230, 460 Volt! Inverter Driven Scroll Compressor! Sound Rating as Low as 48 dB’s! Outdoor Units Connect 50:1! Connect up to 150%!
- 75.
- 76. LG = HeatRecovery Unit Branch Circuit Controller Daikin = Branch Selector
- 79.
- 80.
- 81.
- 82. 82 Three Phase HeatPump! 6~36 Tons! 208~230, 460 Volt! Inverter Driven Scroll Compressor! Sound Rating as Low as 48 dB’s! Connect 50:1! Connect up to 130%! Outdoor Units
- 83.
- 84. 84 3,4, & 5Tons! 208~230 Volt, Single Phase! Inverter Driven Scroll Compressor! Sound Rating as Low as 49 dB! Single Phase Heat Pump! Connect up to 130%! Connect 8:1! Outdoor Units
- 85. 85 Indoor Units 11 Stylesand 64 Models
- 86. Space Mounted Units HighWall Mounted Ceiling Suspended Floor Standing (PFFY-NRMU for recessed mounting not shown) CITY MULTI VRF
- 87. Four Way 33x33 CeilingCassette Four Way 24x24 Ceiling Cassette One Way Cassette CITY MULTI VRF Ceiling Recessed Cassettes
- 88. Concealed Ducted Units CeilingConcealed Medium Static Up to .6 In W.C. High Static up to 1 In W.C. Low Profile Up to .2 In W.C. Fan Coil Down/Horizontal Left/ Vertical Ducted Product Review CITY MULTI VRF
- 89. Integrated Digital ControlSystem • 2 Wire DDC System – 16 GA. Stranded & Shielded – Daisy Chain Connection – Non-Polarized • Customizable Control Scheme • Integration into BMS & EMS • Third Party Equipment Control Controls Network
- 90. Controls Network Zone Control CentralSystem Control
- 91. PC-Based Controls Web BrowserFunctionality Product Review CITY MULTI VRF Controls Network
- 92. CITY MULTI VRF iPhone,iPad, iTouch App Controls Network
- 93. IN P1P2F1 F2 P1P2F1F2 P1P2F1 F2 P1P2 F1 F2 P1P2 P1P2 Zone 1 Zone 2 Zone 3 Typical Controls Wiring
- 94. System Design Selection Software • Easyto Use • Drag & Drop System Components • Input Project Information • Output Layout and System Design Selection Software
- 95. Document Design PhaseSystem Design AutoCAD Output AutoCAD
- 96.
- 99.
- 100.
- 101.
- 102.
- 104.
- 105.
- 106. 106 Reduced Electrical Panelfrom 5kVA to 2kVA! Dallas, Texas! The Element Hotel! System is Activate by a Key Card!
- 107. 107 Waco, Texas! Roosevelt Tower! 12-StoryLuxury Office Building!
- 108. 108 Oklahoma City, OK! SandRidgeEnergy! 30-Story Office Building!
- 110. Location of CDU 217ft 167 ft How to overcome higher level difference 384 ft
- 111. CDU on UpperRoof 217 ft 167 ft 1454 Tons
- 112. CDU on LowerRoof 217 ft 167 ft 1259 Tons
- 113.
- 114.
- 115.
- 116. 116 Just wash orreplace the air filters and clean the coils with fresh water. That’s it!! Maintenance
- 117. 117 The number onething you need when! troubleshooting a VRF or DFS system is…….! Service
- 118.
- 119.
- 120.
- 121.
- 122. 122 DC Voltmeter! Selectable! Range upto! 500k Ohm! Ohm-meter!
- 123.
- 124.
- 125.
- 126. 126 VRF Systems are changingthe way we Heat and Cool buildings
- 127.
- 128.