Solving Problems using Variable Refrigerant Flow

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1 Solving Problems using Variable Refrigerant Flow 1

2 Today s Agenda New Construction Challenges Renovation Challenges Other Discussion points

3 Your friendly tour guide John Brantley, PE LEED AP, CEM Mitsubishi Electric HVAC Commercial Area Manager

4 Largest HVAC Distributor in the Southeast Over 30 locations in 5 states Premier Commercial Distributor in southern United States Engineering Support Contractor Support Owner Support Primary lines: Mitsubishi, Carrier, Bard, Data Aire, FHP, Munters Works with utilities, financing, ESCO s, ETS, others

5 What is VRF Technology? Variable Refrigerant Flow

6 Primary System Attributes Zoning Energy Efficiency Simultaneous Heating and Cooling Multiple Indoor Units Integral Control System Variable Capacity Indoor Units

7 VRF Heat Recovery Technology 2 pipes 7 Simultaneous cooling and heating

8 VRF Heat Pump Technology HEATING COOLING 8

9 New Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed Costs

10 New Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed Costs

11 How much electricity has Mitsubishi Electric saved in U.S. homes over the last 10 years? 189,000 MWH (189 Million KWH) 21,000 Homes Off the Grid Saved $18.9 Million for Homeowners

12 Superb System Efficiencies Variable Refrigerant Flow can provide energy savings around 25 to 30% over other system types Using heat pump technology with COP s greater than 2.0 at 17 deg yields tremendous heating savings Variable Refrigerant Flow is a proven energy saving technology as evidenced by thousands of installations

13 New Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed Costs

14 Optimal Comfort System 2 pipes 14 Simultaneous cooling and heating

15 Indoor Comfort Flexibility Wall-mounted unit Ceiling-suspended unit Floor standing unit

16 Indoor Comfort Flexibility Medium static ducted unit High static ducted unit Low-profile ducted unit Vertical ducted unit

17 Indoor Comfort Flexibility 4-way large cassette 4-way small cassette 1-way cassette Product Review

18 New Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed Costs

19 Recommended Maintenance Schedule Clean indoor unit air filters Recommended every 30 days Clean indoor and outdoor unit coils Recommended annually

20 No Longer Required Maintenance Water Quality Testing and Balancing Belt Changes PTAC Replacement!!

21 New Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed Costs

22 What Does QUIET Sound Like? How LOUD is a traditional HVAC unit? How QUIET are VRF Systems? Indoor Unit Ducted Unit Single Phase Outdoor Unit Commercial Outdoor Unit As low as 19 db(a) As low as 23 db(a) As low as 46 db(a) As high as 57 db(a) As low as 61 db(a) 25 db(a) Recording Studio 33 db(a) Library 40 db(a) Quiet Home 50 db(a) Refrigerator 60 db(a) Conversation 70 db(a) Busy Traffic 78 db(a) Vacuum 90 db(a) Motorcycle 100 db(a) Hand Drill db(a) db(a) db(a) PTAC Unit Residential 3-ton HVAC Unit Air-cooled Chiller

23 New Facility Construction Challenges Reducing Energy Consumption Providing Desired Comfort Levels Reducing Maintenance Costs Sound Level Constraints Installed Costs

24 VRF Installed Cost Proper analysis of VRF Installed Cost must evaluate changes in all areas of construction (electrical, architectural, etc ) Air Cooled VRF should be comparable in first cost with WSHP Air Cooled VRF should be cheaper installed than four pipe systems

25 Renovation Project Challenges Limited/Insufficient Electric Service Adequate space to install systems

26 Renovation Project Challenges Limited/Insufficient Electric Service Adequate space to install systems

27 Electrical Comparison 100 ton cooling load system using 50 (2) 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 system

28 2 Pipe VRF Design (5) 20 ton systems with (10) 2 ton ducted air handlers per system System MCA/Unit # Units Total MCA Volt/phase Condensing Unit /3 BC Controllers /1 Indoor Unit /1

29 Thru Wall Unit Design (50) 2 ton wall mounted heat pump units with 4 KW electric backup heat System MCA/Unit # Units Total MCA Volt/phase Thru the Wall /1 Thru the Wall /3

30 VAV Design (4) 25 ton package rooftop units with VAV boxes with 4 kw electric reheat System MCA/Unit # Units Total MCA Volt/phase 25 ton Package Rooftop Unit VAV Box with 4 KW electric reheat / /1

31 Chilled Water Design 100 ton air cooled chiller with (50) 2 ton, 2 pipe fan coils with 4 kw electric heat System MCA/Unit # Units Total MCA Volt/phase Chiller w/pumping package /3 Fan Coils /1

32 Electrical Savings Summary System Total MCA- 3 Ph Total MCA- 1 Ph VRF Thru the Wall (1 or 3 ph.) Rooftop VAV Chilled water FCU s

33 Renovation Project Challenges Limited/Insufficient Electric Service Adequate space to install systems

34 Space Saving Installation Space Required to deliver 20 tons of Cooling VRF 20 tons Ducted 20 tons 30 Round Supply Duct 1 1 /8 Liquid 1 1 /8 Gas Chilled Water 20 tons Ducted 20 tons 40 x 20 Supply Duct 3 CHW supply 3 CHW return

35 Rooftop Equipment Layout RTU & S/S 80 ton Systems VAV CM WSHP 4-PIPE

36 Rooftop Equipment Layout

37 Mechanical Room Not Required

38 Primary System Attributes Zoning Energy Efficiency Other 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)

39 Other Discussion Points Outside Air Introduction Dehumidification Control

40 Thank you for your time! Questions? 40

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