2010 Building Science Corporation Expert Session - Mechanical System Selection

Mechanical System Selection James Petersen, P.E. Petersen Engineering

Oracle at Delphi – Greek Mythology
gnōthi seautón = " know thyself “
mēdén ágan = "nothing in excess"

Oracle at the chicken coop

Painful Lessons

Single Family Residence

Neighborhood Boiler Plant

Student Housing Complex Boiler Plant

End of Painful Lessons

DURABLE

Castle Square, Boston Garden Apartments - 308 Units Midrise Apartments - 192 Units

Castle Square – Midrise Units

Concept Midrise Systems Approaches 4-20-09
Heating & A/C Approaches
Central Boiler, Perimeter BB, thru-wall A/C
VRV air-cooled heat pump
Heat pump – water-source
Ventilation Approaches
Local Exhaust w Passive Inlet Vent
Central Exhaust w Passive Inlet Vent
Local HRV
Fresh Air to Heat Pump
Domestic Hot Water Approaches
As Is
New Heat Source
Local Electric

Final Midrise System Selection 9-4-09
Heating and Air-conditioning
Replace central boiler plant with high efficiency condensing boiler plant
Reuse hydronic distribution piping
Replace unit baseboard and controls
Replace unit air-conditioners
Ventilation
Provide new central exhaust fans with variable speed control
Air seal existing central exhaust ductwork with “Aeroseal” duct sealing system
Provide new exhaust grilles at kitchens and baths with modulating control
Install engineered passive inlet vents at all exterior rooms
Domestic Hot Water
Insulate existing hot water piping
Integrate domestic hot water production with heating plant
Install solar thermal system

Castle Square – Garden Apartments

Concept Garden Systems Approaches 4-20-2009
Heating & A/C Approaches
Fancoil, 1 Boiler per 4 units, thru-wall A/C
Fancoil, 1 Boiler plant per building, thru-wall A/C
VRV air-cooled heat pump
Ventilation Approaches
Local Exhaust w/ Passive Inlet Vent
Local HRV
Fresh Air to Fancoil
Domestic Hot Water Approaches
As Is
New Heat Source
Electric

Final Garden Apartments System Selection 9-4-2009
Heating and Air-conditioning
Replace furnaces with fan-coils
Reuse supply and return ductwork
Install one new wall-hung condensing boiler per four living units
Replace unit air-conditioners
Ventilation
Add kitchen and bathroom exhaust fans, ducted to exterior brick vents/wall caps
Add fresh air connection to furnace return air duct
Domestic Hot Water
Replace water heaters with indirect-fired storage tanks

Old Colony, Boston

116 UNITS (1000 UNITS OVER 10 YRS)
Old Colony, Boston

Typical 1 Br Midrise Unit Typical Townhouse Unit

335 Maplewood Ave Project Blog: www.petersenengineering.com

Existing Proposed

Durable

Questions?
[email_address]
www.petersenengineering.com
HA!!

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2010 Building Science Corporation Expert Session - Mechanical System Selection

by Petersen Engineering, Inc. on Jun 14, 2010

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2010 Building Science Corporation Expert Session - Mechanical System Selection — Presentation Transcript