1 / 16

Geothermal Retrofit of HVAC Systems

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

libra
Download Presentation

Geothermal Retrofit of HVAC Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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

  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 192oF

  3. HVAC SystemsTypes • 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 SystemsAll-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 SystemsAll-Air Systems • Single duct systems Fossil-fuel furnace with direct-expansion (DX) cooling

  6. HVAC SystemsAll-Air Systems • Single duct systems Commercial system with central heating and cooling coils

  7. HVAC SystemsAll-Air Systems • Single duct systems Commercial roof-top units

  8. HVAC SystemsAll-Air Systems • Single duct systems Commercial system with central heating and cooling coils

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

  10. HVAC SystemsAll-Air Systems • Geothermal Retrofit Suitability (Rafferty, 1998) • Low Temperature water (<150oF) • Single-zone, multi-zone, dual duct 8-10 • Terminal reheat, VAV 6-8 • Standard Temperature water (180-200oF) • Single-zone, multi-zone, dual duct 7-8 • Terminal reheat, VAV 6-7 • Steam • Single-zone, multi-zone, dual duct 6 • Terminal reheat, VAV 4-5 • Electric resistance furnace 5-6 • Air-air split heat pump 3-4 • Fossil-fuel furnace 4-5 • Packaged roof-top unit 3-4 • Fossil-fuel fired unit heaters 3-4

  11. HVAC SystemsAll-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 SystemsAll-Water Systems Unit ventilator (4-pipe) Fan coil unit

  13. HVAC SystemsAll-Water Systems Cast iron radiator Fin tube radiator

  14. HVAC SystemsAll-Water Systems Water loop heat pump (California loop)

  15. HVAC SystemsAll-Water Systems • Geothermal Retrofit Suitability (Rafferty, 1998) • Loop heat pump 10 • Radiant panel 10 • Fan coil/unit ventilator 7-9 • Unit heaters 7 • Finned tube convector 6 • Steam systems 1-3

  16. HVAC SystemsPerimeter Electric Systems • Geothermal Retrofit Suitability (Rafferty, 1998) • Electric baseboard 2 • Through-the-wall units 1

More Related