Solving Problems using Variable Refrigerant Flow - …

1 1 Solving Problems using Variable Refrigerant FlowToday s Agenda New Construction Challenges Renovation Challenges Other Discussion pointsYour friendly tour guide John Brantley, PELEED AP , CEM Mitsubishi Electric HVAC Commercial Area Manager Engineering Support Contractor Support Owner Support Primary lines: Mitsubishi, Carrier, Bard, Data Aire, FHP, Munters Works with utilities, financing, ESCO s, ETS, others Largest HVAC Distributor in the Southeast Over 30 locations in 5 states Premier Commercial Distributor in southern United StatesWhat is VRF Technology?

2 VariableRefrigerant Flow Primary System AttributesZoningEnergy EfficiencySimultaneous Heating and CoolingMultiple Indoor UnitsIntegral Control SystemVariable Capacity Indoor Units7 VRF Heat Recovery TechnologySimultaneous cooling and heating2 pipes8 VRF Heat Pump TechnologyCOOLINGHEATINGNew Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed CostsNew Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed CostsHow much electricity has How much electricity has Mitsubishi Mitsubishi Electric savedElectric savedin homes over the in homes over the last last 10 years?

3 10 years?21,000 HomesOff the Grid189,000 MWH(189 Million KWH)Saved$ Millionfor HomeownersSuperb System Efficiencies Variable Refrigerant Flow can provide energy savings around 25 to 30% over other system types using heat pump technology with COP sgreater than at 17 deg yields tremendous heating savings Variable Refrigerant Flow is a proven energy saving technology as evidenced by thousands of installationsNew Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed

4 Costs14 Optimal Comfort SystemSimultaneous cooling and heating2 pipesIndoor Comfort FlexibilityFloor standing unitWall-mounted unitCeiling-suspended unitIndoor Comfort FlexibilityVertical ducted unitMedium static ducted unitHigh static ducted unitLow-profile ducted unitProduct Review 4-way large cassetteIndoor Comfort Flexibility4-way small cassette1-way cassetteNew Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed CostsRecommended Maintenance ScheduleClean indoor unit air filtersRecommended every 30 daysClean indoor and outdoor unit coilsRecommended annuallyNo Longer Required Maintenance Water Quality Testing and Balancing Belt Changes PTAC Replacement!

5 !New Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed CostsHow LOUD is a traditional HVAC unit? What Does QUIET Sound Like?What Does QUIET Sound Like?33 dB(A)Library50 dB(A)Refrigerator60 dB(A)Conversation78 dB(A)Vacuum25 dB(A)Recording Studio65-75 dB(A)Residential3-tonHVAC UnitHow QUIET are VRF Systems?50-60 dB(A)PTACUnit90 dB(A)MotorcycleAs low as19 dB(A)Indoor UnitAs low as23 dB(A)Ducted UnitCommercialOutdoor UnitAs low as61 dB(A)100 dB(A)Hand Drill70 dB(A)Busy Traffic40 dB(A)Quiet Home75-85 dB(A)Air-cooledChiller As high as57 dB(A)Single PhaseOutdoor UnitAs low as46 dB(A)

6 New Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed CostsVRF Installed Cost Proper analysis of VRF Installed Cost must evaluate changes in all areas of construction (electrical, architectural, ) Air Cooled VRF should be comparable in first cost with WSHP Air Cooled VRF should be cheaper installed than four pipe systemsRenovation Project Challenges Limited/Insufficient Electric Service Adequate space to install systemsRenovation Project Challenges Limited/Insufficient Electric Service Adequate space to install systemsElectrical Comparison 100 ton cooling load system using 50 (2)

7 Ton zones In heating fan coils are providing approx 100 deg supply air temp with 70 deg RA using 2 KW/ton resistance heat and 50% airflow All systems are provided neutral outside air year round by a separate system2 Pipe VRF Design (5) 20 ton systems with (10) 2 ton ducted air handlers per systemSystemMCA/Unit# UnitsTotal MCAVolt/phaseCondensing Unit4910490208/3BC Wall Unit Design (50) 2 ton wall mounted heat pump units with 4 KW electric backup heatSystemMCA/Unit# UnitsTotal MCAVolt/phaseThru the Wall44502200208/1 Thru the Wall35501750208/3 VAV Design (4) 25 ton package rooftop units with VAV boxes with 4 kw electric reheatSystemMCA/Unit# UnitsTotal MCAVolt/phase25 ton Package Rooftop Box with 4 KW electric Water Design 100 ton air cooled chiller with (50)

8 2 ton, 2 pipe fan coils with 4 kw electric heatSystemMCA/Unit# UnitsTotal MCAVolt/phaseChiller w/pumping Savings SummarySystemTotal MCA-3 PhTotal MCA-1 the Wall (1 or 3 ph.)17502200 Rooftop VAV597960 Chilled water FCU s490983 Renovation Project Challenges Limited/Insufficient Electric Service Adequate space to install systemsSpace Saving InstallationSpace Required to deliver 20 tons of CoolingSpace Required to deliver 20 tons of CoolingDucted 20 tons40 x 20 Supply DuctDucted 20 tons30 Round Supply Duct11/8 Liquid11/8 Gas3 CHW supply3 CHW returnVRF 20 tons Chilled Water20 tonsRooftop Equipment LayoutCMWSHP4-PIPEVAVRTU & S/S80 ton Systems80 ton SystemsRooftop Equipment

9 LayoutMechanical Room Not RequiredMechanical Room Not RequiredPrimary System AttributesZoningEnergy EfficiencyOther Application Opportunities Ductless Systems Projects requiring fast installation Projects considering using geothermal equipment Projects involving phasing/tenant buildout Chilled water/4 pipe designs (operation flexibility)Other Discussion Points Outside Air Introduction Dehumidification Control40 Thank you for your time!Questions?