2010 building science corporation expert session - mechanical system selection
TRANSCRIPT
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Mechanical System Mechanical System SelectionSelection
James Petersen, P.E.James Petersen, P.E.
Petersen EngineeringPetersen Engineering
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Oracle at Delphi – Greek Oracle at Delphi – Greek MythologyMythology
gnōthi seautón = "gnōthi seautón = "know thyselfknow thyself““
mēdén ágan = "nothing in excess"mēdén ágan = "nothing in excess"
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Oracle at the chicken coopOracle at the chicken coop
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Painful LessonsPainful Lessons
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SingleSingle Family Residence Family Residence
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Neighborhood Boiler Neighborhood Boiler PlantPlant
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Neighborhood Boiler Neighborhood Boiler PlantPlant
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Student Housing Complex Boiler Plant
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End of Painful LessonsEnd of Painful Lessons
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DURABLEDURABLE
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Castle Square, BostonCastle Square, Boston
Garden Apartments - 308 Garden Apartments - 308 UnitsUnitsMidrise Apartments - 192 Midrise Apartments - 192 UnitsUnits
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Castle Square – Midrise Castle Square – Midrise UnitsUnits
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Concept Midrise Systems Approaches Concept Midrise Systems Approaches 4-20-094-20-09
Heating & A/C ApproachesHeating & A/C Approaches Central Boiler, Perimeter BB, thru-wall A/CCentral Boiler, Perimeter BB, thru-wall A/C VRV air-cooled heat pump VRV air-cooled heat pump Heat pump – water-source Heat pump – water-source
Ventilation ApproachesVentilation Approaches Local Exhaust w Passive Inlet VentLocal Exhaust w Passive Inlet Vent Central Exhaust w Passive Inlet Vent Central Exhaust w Passive Inlet Vent Local HRV Local HRV Fresh Air to Heat Pump Fresh Air to Heat Pump
Domestic Hot Water ApproachesDomestic Hot Water Approaches As Is As Is New Heat SourceNew Heat Source Local ElectricLocal Electric
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Final Midrise System Selection Final Midrise System Selection 9-4-099-4-09
Heating and Air-conditioningHeating and Air-conditioning Replace central boiler plant with high efficiency condensing boiler Replace central boiler plant with high efficiency condensing boiler
plantplant Reuse hydronic distribution pipingReuse hydronic distribution piping Replace unit baseboard and controlsReplace unit baseboard and controls Replace unit air-conditionersReplace unit air-conditioners
VentilationVentilation Provide new central exhaust fans with variable speed controlProvide new central exhaust fans with variable speed control Air seal existing central exhaust ductwork with “Aeroseal” duct sealing Air seal existing central exhaust ductwork with “Aeroseal” duct sealing
systemsystem Provide new exhaust grilles at kitchens and baths with modulating Provide new exhaust grilles at kitchens and baths with modulating
controlcontrol Install engineered passive inlet vents at all exterior roomsInstall engineered passive inlet vents at all exterior rooms
Domestic Hot WaterDomestic Hot Water Insulate existing hot water pipingInsulate existing hot water piping Integrate domestic hot water production with heating plantIntegrate domestic hot water production with heating plant Install solar thermal systemInstall solar thermal system
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Castle Square – Garden Castle Square – Garden ApartmentsApartments
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Concept Garden Systems ApproachesConcept Garden Systems Approaches 4-20-2009 4-20-2009
Heating & A/C ApproachesHeating & A/C Approaches Fancoil, 1 Boiler per 4 units, thru-wall A/C Fancoil, 1 Boiler per 4 units, thru-wall A/C Fancoil, 1 Boiler plant per building, thru-wall Fancoil, 1 Boiler plant per building, thru-wall
A/C A/C VRV air-cooled heat pump VRV air-cooled heat pump
Ventilation ApproachesVentilation Approaches Local Exhaust w/ Passive Inlet Vent Local Exhaust w/ Passive Inlet Vent Local HRV Local HRV Fresh Air to Fancoil Fresh Air to Fancoil
Domestic Hot Water ApproachesDomestic Hot Water Approaches As Is As Is New Heat Source New Heat Source Electric Electric
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Final Garden ApartmentsFinal Garden Apartments System Selection 9-4-2009 System Selection 9-4-2009
Heating and Air-conditioningHeating and Air-conditioning Replace furnaces with fan-coilsReplace furnaces with fan-coils Reuse supply and return ductworkReuse supply and return ductwork Install one new wall-hung condensing boiler per four living Install one new wall-hung condensing boiler per four living
unitsunits Replace unit air-conditionersReplace unit air-conditioners
VentilationVentilation Add kitchen and bathroom exhaust fans, ducted to exterior Add kitchen and bathroom exhaust fans, ducted to exterior
brick vents/wall capsbrick vents/wall caps Add fresh air connection to furnace return air ductAdd fresh air connection to furnace return air duct
Domestic Hot WaterDomestic Hot Water Replace water heaters with indirect-fired storage tanks Replace water heaters with indirect-fired storage tanks
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Old Colony, BostonOld Colony, Boston
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116 UNITS (1000 UNITS OVER 10 YRS)116 UNITS (1000 UNITS OVER 10 YRS)
Old Colony, BostonOld Colony, Boston
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Typical 1 Br Midrise Unit
Typical Townhouse Unit
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335 Maplewood Ave335 Maplewood Ave
Project Blog: www.petersenengineering.com
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Existing Proposed
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DurableDurable
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Questions?Questions?
[email protected]@petersenengineering.com
www.petersenengineering.comwww.petersenengineering.com
HA!!HA!!