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Heating and Cooling Systems Micro systems for micro loads Marc Rosenbaum, P.E. South Mountain Company Martha’s Vineyard, MA Mike LeBeau Conservation Technology.

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Presentation on theme: "Heating and Cooling Systems Micro systems for micro loads Marc Rosenbaum, P.E. South Mountain Company Martha’s Vineyard, MA Mike LeBeau Conservation Technology."— Presentation transcript:

1 Heating and Cooling Systems Micro systems for micro loads Marc Rosenbaum, P.E. South Mountain Company Martha’s Vineyard, MA Mike LeBeau Conservation Technology Duluth, MN Build Boston November 17 th, 2010

2 The Boston Society of Architects/AIA is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. Welcome

3 This presentation is protected by US and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. © Mike LeBeau and Marc Rosenbaum 2010 Copyright materials

4 Learning Objectives Objective 1: Learn how the Passive House approach to HVAC design differs from conventional HVAC design. Objective 2: Get introduced to the new sorts of technologies available that are more appropriate for “micro-load” buildings than conventional HVAC equipment. Objective 3: Learn the potential pitfalls and mistakes you might make the first few times you try to design—or find installers for—high- efficiency, small-capacity HVAC equipment. Objective 4: Understand how ventilation becomes the driving force in equipment and delivery system (such as ductwork) lay-outs.

5 What is the BEST Heating System? R-40 walls R-60 roof R-20 foundation Triple glazed, low-e windows Under 1 ACH50 * Bill Rock Smith and Marc Rosenbaum, early 1990s in the Energy Crafted Homes program © Marc Rosenbaum, P.E. Energysmiths 2010

6 Heating load is about 6 BTU/hour/ft2

7 Ventilation Any house in this load range will have heat or energy recovery ventilation. © Marc Rosenbaum, P.E. Energysmiths 2010

8 System approaches HRV/ERV with electric duct heater - heating only © Marc Rosenbaum, P.E. Energysmiths 2010

9 System approaches HRV/ERV with hydronic coil - heating and cooling possible (with source of chilled water) © Marc Rosenbaum, P.E. Energysmiths 2010

10 System approaches HRV/ERV supplies fresh air to ducted minisplit heat pump - recirculation air loop - heating and cooling © Marc Rosenbaum, P.E. Energysmiths 2010

11 System approaches HRV/ERV supplies fresh air to fan coil - recirculation air loop - heating and cooling possible (with source of chilled water) © Marc Rosenbaum, P.E. Energysmiths 2010

12 System approaches HRV/ERV is separate system - hydronic heaters - heating only - hydronic baseboard convector or kickspace heater - radiator (e.g., Myson or Buderus) - hydronic radiant (e.g., Wirsbo) © Marc Rosenbaum, P.E. Energysmiths 2010

13 System approaches HRV/ERV is separate system - electric resistance point source heaters - heating only - electric baseboard convector or kickspace heater - electric radiant panel (e.g., Enerjoy) - electric heating mat (e.g., NuHeat or SunTouch) © Marc Rosenbaum, P.E. Energysmiths 2010

14 System approaches HRV/ERV is separate system - point source wall mounted minisplit heat pump(s) - heating and cooling © Marc Rosenbaum, P.E. Energysmiths 2010

15 System approaches HRV/ERV is separate system - point source biomass or gas heaters - heating only © Marc Rosenbaum, P.E. Energysmiths 2010

16 Eliakim’s Way 8 Net Zero Possible Affordable Homes in West Tisbury, MA Eliakim’s Way 8 Net Zero Possible Affordable Homes in West Tisbury, MA South Mountain Company Martha’s Vineyard, MA

17 Minisplit heat pump - Single indoor unit on a single condenser Electric radiant panel in each bedroom Fantech 704 HRV © Marc Rosenbaum, P.E. Energysmiths 2010

18 Bement School 11,000 sf dormitory with 11 zones - 9 ducted units, 1 wall mount, and 1 floor mount on 4 VRF condensers - design heat loss ~75,000 BTU/hour Margo Jones Architect Greenfield, MA

19 Wall cassette Ducted air handler Renewaire EV130 ERV Floor console © Marc Rosenbaum, P.E. Energysmiths 2010

20 South Mountain Company Ryan Bushey, architect; Billy Dillon, foreman; Ben Brungraber, structural wizard; Marc Rosenbaum, building geek; Matt Viaggio, insulator extraordinaire; Paul Gens, HVAC Woods Hole Research Center Carriage House Deep Energy Retrofit

21 © Marc Rosenbaum, P.E. Energysmiths 2010

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24 4 Residential ERVs, 130 or 200 CFM each No condensate Located in hip roof corners within the thermal envelope © Marc Rosenbaum, P.E. Energysmiths 2010

25 Blower Door Results 8,215 CFM50 before 743 CFM50 final; 528 CFM50 with ERV louvers taped This is <0.6 ACH50 © Marc Rosenbaum, P.E. Energysmiths 2010

26 Plainfield, NH School Deep Energy Retrofit © Marc Rosenbaum, P.E. Energysmiths 2010

27 Minisplit heat pump wall cassette Perforated fabric duct © Marc Rosenbaum, P.E. Energysmiths 2010

28 Renewaire EV200/300 energy recovery ventilator CO2 demand controlled CFM as installed - >10 CFM/person 85% effectiveness (measured at -3F OA and 70F indoor air temperature) No tempering coil © Marc Rosenbaum, P.E. Energysmiths 2010

29 Prototype Classroom Data From January 8th through June 18th, energy into the heat pump was 347 kWh (about $42) 3,576 HDD65F during the period ERV run hours average 33 hours/week (about 85 kWh, $10) Lights on hours/week (about 380 kWh, $45) All energy, including modest plug loads, are likely to be ~ 2,000 kWh/yr – about $240, or below $0.30/sf 24 kWh/m2/yr site energy - ~72 kWh/m2/yr primary energy © Marc Rosenbaum, P.E. Energysmiths 2010

30 This concludes The American Institute of Architects Continuing Education Systems program. Thank you. QUESTIONS?


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