vrf system innovations contributing to net positive energy ... · typical commercial building...
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© 2018 Daikin North America, LLC© 2018 Daikin North America, LLC
VRF System Innovations Contributing to Net Positive Energy BuildingsMike Ragan
© 2018 Daikin North America, LLC© 2018 Daikin North America, LLC
Ventilation Solutions – DVS DOAS
Optimized for Cold Climates – VRV AuroraOverview
© 2018 Daikin North America, LLC
VRV DVS Dedicated Outside Air System (DOAS)
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Typical Commercial Building Energy Usage
Industry 31%
Electricity79%
PPLs33%
Trans-portation
28%
Natural Gas17%
Lighting20%
Residential22% Space Heating
16%
Commercial19%
Space Cooling13%
Ventilation 11%
Water Heating 7%
0%10%20%30%40%50%60%70%80%90%
100%
U.S. Primary Energy Breakdown Commercial Buildings Energy Sources
Commercial Buildings Energy Use Breakdown
Balance Ventilation Effectiveness VS. Cost/Efficiency
On-Site Renewables 1%Petroleum/Coal 3%
© 2018 Daikin North America, LLC
VRV DVS Dedicated Outside Air System (DOAS)
4
§ Decentralized split system approach to ventilation§ Designed for use with VRV HR units to provide outside air (decoupled or integrated)§ Available in nominal 1000, 2000 & 3000 CFM sizes
VRV Heat Recovery
VRV DOAS
Offices Schools Retail
1-3 Story Low Rise Buildings
Target Applications
Other Commercial Buildings
© 2018 Daikin North America, LLC
VRV DVS Dedicated Outside Air System (DOAS)
§ Entering temperature up to 120°F
§ Controls to a specific Discharge Air Temperature from DX Coil
§ Controls to a Discharge Air Temperature from reheat coil (neutral air)
§ Minimum entering air temperatures:
§ 23°F during heat pump operation
§ -20°F with gas heat (optional)
§ Discharge air temperature can be set to provide neutral air
§ Smaller auxiliary heat or no auxiliary heat in some areas
Cooling Operation
Heating Operation
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© 2018 Daikin North America, LLC© 2018 Daikin North America, LLC
Ventilation Solutions – DVS DOAS
Optimized for Cold Climates – VRV AuroraOverview
© 2018 Daikin North America, LLC
VRV Aurora – Optimized for Cold Climates
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Innovation optimized for cold climates § 1st VRF system to provide heating down to -22°F
as standard§ High heating capacity
§ Up to 100% of nominal at 0°F§ Up to 85% of nominal at -13°F§ Up to 60% of nominal at -22°F
§ New Daikin K-type inverter scroll compressor for improved heating and part-load operation
§ Hot gas coil circuit eliminates drain pan heaters§ Continuous heating during defrost / oil return
© 2018 Daikin North America, LLC
VRV Aurora – Optimized for Cold Climates
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Increased Performance in Low-Ambient Conditions
Performance MetricRange (All Sizes)
Non-Ducted DuctedEER 12.3 - 15.8 11.7 - 13.7
Heating COP 3.68 - 4.3 3.44 - 3.68
Heating COP @17F 2.2 - 2.5 2.13 - 2.3
IEER 21.1 - 24.8 18.6 - 20.8
SCHE 24.9 - 26.7 19.7 - 23.8
Energy-Efficient Systems Designed for Green Buildings
© 2018 Daikin North America, LLC