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Andrew Chiasson Geo-Heat Center Oregon Institute of Technology Geothermal Retrofit of HVAC Systems Absorption Chiller (Yazaki Energy Systems) Water-air.

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Presentation on theme: "Andrew Chiasson Geo-Heat Center Oregon Institute of Technology Geothermal Retrofit of HVAC Systems Absorption Chiller (Yazaki Energy Systems) Water-air."— Presentation transcript:

1 Andrew Chiasson Geo-Heat Center Oregon Institute of Technology Geothermal Retrofit of HVAC Systems Absorption Chiller (Yazaki Energy Systems) Water-air heat exchanger Water-water plate heat exchanger

2 Retrofit Possibilities  Space heating  Domestic hot water  Suitability depends mainly on flow requirements and need for storage  Space cooling  Newer absorption chillers rated at 192 o F

3 HVAC Systems Types  Several types of configurations for space heating  HVAC systems are categorized by the method used to convey energy  All-air systems  Air-and-water systems  All-water systems

4 HVAC Systems All-Air Systems  All heating, cooling, and humidification is supplied to a space by the air  Single-duct systems  Constant volume  Multi-zone, variable-air volume (VAV)  Multi-zone with re-heat  Dual-duct systems

5 HVAC Systems All-Air Systems  Single duct systems Fossil-fuel furnace with direct-expansion (DX) cooling

6 HVAC Systems All-Air Systems  Single duct systems Commercial system with central heating and cooling coils

7 HVAC Systems All-Air Systems  Single duct systems Commercial roof-top units

8 HVAC Systems All-Air Systems  Single duct systems Commercial system with central heating and cooling coils

9 HVAC Systems All-Air Systems  Single duct systems Multi-zone commercial system with variable-air volume (VAV) fan

10 HVAC Systems All-Air Systems  Geothermal Retrofit Suitability (Rafferty, 1998)  Low Temperature water (<150 o F)  Single-zone, multi-zone, dual duct8-10  Terminal reheat, VAV6-8  Standard Temperature water ( o F)  Single-zone, multi-zone, dual duct7-8  Terminal reheat, VAV6-7  Steam  Single-zone, multi-zone, dual duct6  Terminal reheat, VAV4-5  Electric resistance furnace5-6  Air-air split heat pump3-4  Fossil-fuel furnace4-5  Packaged roof-top unit3-4  Fossil-fuel fired unit heaters3-4

11 HVAC Systems All-Water Systems  Hot and chilled water are distributed to terminal units and equipment  Free-standing radiators  Baseboard radiators  Wall, floor, ceiling panels  Fan coil units

12 HVAC Systems All-Water Systems Fan coil unit Unit ventilator (4-pipe)

13 HVAC Systems All-Water Systems Fin tube radiator Cast iron radiator

14 HVAC Systems All-Water Systems Water loop heat pump (California loop)

15 HVAC Systems All-Water Systems  Geothermal Retrofit Suitability (Rafferty, 1998)  Loop heat pump10  Radiant panel10  Fan coil/unit ventilator7-9  Unit heaters 7  Finned tube convector 6  Steam systems1-3

16 HVAC Systems Perimeter Electric Systems  Geothermal Retrofit Suitability (Rafferty, 1998)  Electric baseboard2  Through-the-wall units1


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