geothermal retrofit of hvac systems
DESCRIPTION
Geothermal Retrofit of HVAC Systems. Andrew Chiasson Geo-Heat Center Oregon Institute of Technology. Absorption Chiller (Yazaki Energy Systems). Water-water plate heat exchanger. Water-air heat exchanger. Retrofit Possibilities. Space heating Domestic hot water - PowerPoint PPT PresentationTRANSCRIPT
Andrew ChiassonAndrew ChiassonGeo-Heat CenterGeo-Heat Center
Oregon Institute of TechnologyOregon Institute of Technology
Geothermal Retrofit Geothermal Retrofit of HVAC Systemsof HVAC Systems
Absorption ChillerAbsorption Chiller(Yazaki Energy Systems)(Yazaki Energy Systems)
Water-airWater-airheat exchangerheat exchanger
Water-waterWater-waterplate heat exchangerplate heat exchanger
Retrofit PossibilitiesRetrofit Possibilities Space heating Space heating Domestic hot waterDomestic hot water
Suitability depends mainly on flow Suitability depends mainly on flow requirements and need for storagerequirements and need for storage
Space coolingSpace cooling Newer absorption chillers rated at 192Newer absorption chillers rated at 192ooFF
HVAC SystemsHVAC SystemsTypesTypes
Several types of configurations for space Several types of configurations for space heatingheating
HVAC systems are categorized by the HVAC systems are categorized by the method used to convey energymethod used to convey energy All-air systemsAll-air systems Air-and-water systemsAir-and-water systems All-water systemsAll-water systems
HVAC SystemsHVAC SystemsAll-Air SystemsAll-Air Systems
All heating, cooling, and humidification is All heating, cooling, and humidification is supplied to a space by the airsupplied to a space by the air Single-duct systemsSingle-duct systems
Constant volumeConstant volume Multi-zone, variable-air volume (VAV)Multi-zone, variable-air volume (VAV) Multi-zone with re-heatMulti-zone with re-heat
Dual-duct systemsDual-duct systems
HVAC SystemsHVAC SystemsAll-Air SystemsAll-Air Systems
Single duct systemsSingle duct systemsFossil-fuel furnace with direct-expansion (DX) cooling
HVAC SystemsHVAC SystemsAll-Air SystemsAll-Air Systems
Single duct systemsSingle duct systemsCommercial system with central heating and cooling coils
HVAC SystemsHVAC SystemsAll-Air SystemsAll-Air Systems
Single duct systemsSingle duct systemsCommercial roof-top units
HVAC SystemsHVAC SystemsAll-Air SystemsAll-Air Systems
Single duct systemsSingle duct systemsCommercial system with central heating and cooling coils
HVAC SystemsHVAC SystemsAll-Air SystemsAll-Air Systems
Single duct systemsSingle duct systemsMulti-zone commercial system with variable-air volume (VAV) fan
HVAC SystemsHVAC SystemsAll-Air SystemsAll-Air Systems
Geothermal Retrofit Suitability (Rafferty, 1998)Geothermal Retrofit Suitability (Rafferty, 1998) Low Temperature water (<150Low Temperature water (<150ooF)F)
Single-zone, multi-zone, dual ductSingle-zone, multi-zone, dual duct 8-108-10 Terminal reheat, VAVTerminal reheat, VAV 6-86-8
Standard Temperature water (180-200Standard Temperature water (180-200ooF)F) Single-zone, multi-zone, dual ductSingle-zone, multi-zone, dual duct 7-87-8 Terminal reheat, VAVTerminal reheat, VAV 6-76-7
SteamSteam Single-zone, multi-zone, dual ductSingle-zone, multi-zone, dual duct 66 Terminal reheat, VAVTerminal reheat, VAV 4-54-5
Electric resistance furnaceElectric resistance furnace 5-65-6 Air-air split heat pumpAir-air split heat pump 3-43-4 Fossil-fuel furnaceFossil-fuel furnace 4-54-5 Packaged roof-top unitPackaged roof-top unit 3-43-4 Fossil-fuel fired unit heatersFossil-fuel fired unit heaters 3-43-4
HVAC SystemsHVAC SystemsAll-Water SystemsAll-Water Systems
Hot and chilled water are distributed to Hot and chilled water are distributed to terminal units and equipmentterminal units and equipment Free-standing radiatorsFree-standing radiators Baseboard radiatorsBaseboard radiators Wall, floor, ceiling panelsWall, floor, ceiling panels Fan coil unitsFan coil units
HVAC SystemsHVAC SystemsAll-Water SystemsAll-Water Systems
Fan coil unit Unit ventilator (4-pipe)
HVAC SystemsHVAC SystemsAll-Water SystemsAll-Water Systems
Fin tube radiator Cast iron radiator
HVAC SystemsHVAC SystemsAll-Water SystemsAll-Water Systems
Water loop heat pump (California loop)
HVAC SystemsHVAC SystemsAll-Water SystemsAll-Water Systems
Geothermal Retrofit Suitability (Rafferty, 1998)Geothermal Retrofit Suitability (Rafferty, 1998)
Loop heat pumpLoop heat pump 1010
Radiant panelRadiant panel 1010
Fan coil/unit ventilatorFan coil/unit ventilator 7-97-9
Unit heatersUnit heaters 77
Finned tube convectorFinned tube convector 66
Steam systemsSteam systems 1-31-3
HVAC SystemsHVAC SystemsPerimeter Electric SystemsPerimeter Electric Systems
Geothermal Retrofit Suitability (Rafferty, 1998)Geothermal Retrofit Suitability (Rafferty, 1998)
Electric baseboardElectric baseboard 22
Through-the-wall unitsThrough-the-wall units 11