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Geothermal Discussion: Office of Energy Security


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Geothermal Discussion: Office of Energy Security

  1. 1. Geothermal Discussion CERTS 2009 February 11, 2009 Jeff Haase
  2. 2. Energy Conservation Policy Goal …achieve annual energy savings equal to 1.5 percent of annual retail energy sales of electricity and natural gas directly through: – energy conservation improvement programs; and – rate design and indirectly through: – energy codes and appliance standards; – programs designed to transform the market or change consumer behavior; – energy savings resulting from efficiency improvements to the utility infrastructure and system; – and other efforts to promote energy efficiency and energy conservation. 2
  3. 3. MN Geothermal Report • Funded to develop a comparison to conventional systems: – natural gas and conventional AC • The report evaluated: – Emissions – Economics • Due to funding limitations the dataset for the report was modeled 3
  4. 4. Geothermal Challenges • High up-front costs associated with the well field – Other parts of the system are similar in cost to traditional equipment – Infrastructure investment that stays with the house • Comparison to natural gas and air cooled AC • Variability of well field installation 4
  5. 5. GSHP & Solar PV • In some respects the challenges of these two technologies are similar – High up front cost – Site specific installation – Technology advocates – Low operating costs 5
  6. 6. GSHP Viability with Building load Viability High Load Low Load Building Heating/Cooling Load 6
  7. 7. GSHP Viability with Building Efficiency Viability Inefficient Very Efficient Building Efficiency 7
  8. 8. Energy savings goals Regional emissions will continue to decrease with increased renewable energy on the system 8
  9. 9. Energy System Changes • More renewables are expected to make up utility generation portfolios. • Wind has characteristics that are synergistic with GSHP. • The high EERs that GSHP can deliver in the summer months help to offset very expensive power. 9
  10. 10. When should you take a closer look? • Electric space heating • High heating/cooling load • Cheap well field install – Land for horizontal installation – Pond or lake loop installation • Favorable utility rates – Space heating, GSHP or Dual Fuel • Aversion to combustion sources 10
  11. 11. Other considerations • Efficiency, efficiency, efficiency • It’s all about cost – The well field • Quality installation • Long term financing • Tax credits 11
  12. 12. Thank You! Jeff Haase 651.297.5648