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2010 Building Science Corporation Expert Session - Mechanical System Selection

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2010 Building Science Corporation Expert Session - Mechanical System Selection

  1. 2. Mechanical System Selection James Petersen, P.E. Petersen Engineering
  2. 7. Oracle at Delphi – Greek Mythology <ul><li>gnōthi seautón = &quot; know thyself “ </li></ul><ul><li>mēdén ágan = &quot;nothing in excess&quot; </li></ul>
  3. 8. Oracle at the chicken coop
  4. 9. Painful Lessons
  5. 10. Single Family Residence
  6. 11. Neighborhood Boiler Plant
  7. 12. Neighborhood Boiler Plant
  8. 14. Student Housing Complex Boiler Plant
  9. 18. End of Painful Lessons
  10. 19. DURABLE
  11. 20. Castle Square, Boston Garden Apartments - 308 Units Midrise Apartments - 192 Units
  12. 21. Castle Square – Midrise Units
  13. 22. Concept Midrise Systems Approaches 4-20-09 <ul><ul><li>Heating & A/C Approaches </li></ul></ul><ul><ul><li>Central Boiler, Perimeter BB, thru-wall A/C </li></ul></ul><ul><ul><li>VRV air-cooled heat pump </li></ul></ul><ul><ul><li>Heat pump – water-source </li></ul></ul><ul><ul><li>Ventilation Approaches </li></ul></ul><ul><ul><li>Local Exhaust w Passive Inlet Vent </li></ul></ul><ul><ul><li>Central Exhaust w Passive Inlet Vent </li></ul></ul><ul><ul><li>Local HRV </li></ul></ul><ul><ul><li>Fresh Air to Heat Pump </li></ul></ul><ul><ul><li>Domestic Hot Water Approaches </li></ul></ul><ul><ul><li>As Is </li></ul></ul><ul><ul><li>New Heat Source </li></ul></ul><ul><ul><li>Local Electric </li></ul></ul>
  14. 23. Final Midrise System Selection 9-4-09 <ul><li>Heating and Air-conditioning </li></ul><ul><li>Replace central boiler plant with high efficiency condensing boiler plant </li></ul><ul><li>Reuse hydronic distribution piping </li></ul><ul><li>Replace unit baseboard and controls </li></ul><ul><li>Replace unit air-conditioners </li></ul><ul><li>Ventilation </li></ul><ul><li>Provide new central exhaust fans with variable speed control </li></ul><ul><li>Air seal existing central exhaust ductwork with “Aeroseal” duct sealing system </li></ul><ul><li>Provide new exhaust grilles at kitchens and baths with modulating control </li></ul><ul><li>Install engineered passive inlet vents at all exterior rooms </li></ul><ul><li>Domestic Hot Water </li></ul><ul><li>Insulate existing hot water piping </li></ul><ul><li>Integrate domestic hot water production with heating plant </li></ul><ul><li>Install solar thermal system </li></ul>
  15. 27. Castle Square – Garden Apartments
  16. 29. Concept Garden Systems Approaches 4-20-2009 <ul><ul><li>Heating & A/C Approaches </li></ul></ul><ul><ul><li>Fancoil, 1 Boiler per 4 units, thru-wall A/C </li></ul></ul><ul><ul><li>Fancoil, 1 Boiler plant per building, thru-wall A/C </li></ul></ul><ul><ul><li>VRV air-cooled heat pump </li></ul></ul><ul><ul><li>Ventilation Approaches </li></ul></ul><ul><ul><li>Local Exhaust w/ Passive Inlet Vent </li></ul></ul><ul><ul><li>Local HRV </li></ul></ul><ul><ul><li>Fresh Air to Fancoil </li></ul></ul><ul><ul><li>Domestic Hot Water Approaches </li></ul></ul><ul><ul><li>As Is </li></ul></ul><ul><ul><li>New Heat Source </li></ul></ul><ul><ul><li>Electric </li></ul></ul>
  17. 30. Final Garden Apartments System Selection 9-4-2009 <ul><li>Heating and Air-conditioning </li></ul><ul><li>Replace furnaces with fan-coils </li></ul><ul><li>Reuse supply and return ductwork </li></ul><ul><li>Install one new wall-hung condensing boiler per four living units </li></ul><ul><li>Replace unit air-conditioners </li></ul><ul><li>Ventilation </li></ul><ul><li>Add kitchen and bathroom exhaust fans, ducted to exterior brick vents/wall caps </li></ul><ul><li>Add fresh air connection to furnace return air duct </li></ul><ul><li>Domestic Hot Water </li></ul><ul><li>Replace water heaters with indirect-fired storage tanks </li></ul>
  18. 33. Old Colony, Boston
  19. 34. <ul><ul><li>116 UNITS (1000 UNITS OVER 10 YRS) </li></ul></ul>Old Colony, Boston
  20. 43. Typical 1 Br Midrise Unit Typical Townhouse Unit
  21. 44. 335 Maplewood Ave Project Blog: www.petersenengineering.com
  22. 47. Existing Proposed
  23. 48. Durable
  24. 49. Questions? <ul><li>[email_address] </li></ul><ul><li>www.petersenengineering.com </li></ul>HA!!

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