post occupancy research at the north park passive house
TRANSCRIPT
Post-Occupancy Research at the North Park Passive House
2016 PASSIVE HOUSE NORTHWEST CONFERENCE
MARCH 11, 2016
CHRISTY LOVE | EIT, LEED AP BD+C
Project Partners
Learning Objectives
Understand the scope of the research and what we hope to learn from it.
Understand preliminary results of how the building enclosure is performing.
Understand preliminary results around comfort, air quality, and energy use.
Share lessons learned (so far) about undertaking this type of research.
North Park Passive House
Photo: Ryan Hamilton
Building Background
Final average airtightness = 0.53 ACH at 50 Pa
Construction (hard) cost = $182/SF; ~4% incremental capital cost
Wood frame, ‘deep stud wall’ construction – 2x8 + 2x4 service cavity
Solar PV array, net metering
Monitoring in purchase agreement
Design
Design
Research Questions
Is the enclosure keeping the weather out? Is it drying sufficiently?
Are the suites comfortable and is the interior air quality good?
What is the occupant experience living in a Passive House?
Is the energy consumption as low as predicted?
Photo: Ryan Hamilton
1: Enclosure Performance
Enclosure – Sensor Locations – Exterior Wall
TRHMC
Enclosure Sensor Locations
Enclosure – Sensor Locations – Roof
TRHMC
Enclosure Sensor Install - Roof
Enclosure Monitoring Data – T – S Wall
E I
Enclosure Monitoring Data – T – N Wall
E I
Enclosure Monitoring Data – RH + T – S Wall
E I
Enclosure Monitoring Data – MC - Walls
E I
2. Interior comfort and air quality
Installation
Installation
Installation
Interior comfort monitoring data - T
Interior comfort monitoring data – T + RH
Interior comfort monitoring data – T + RH
Interior air quality monitoring data
Occupant Interviews
Pre-move in interviews – Sept 2015
Winter season interviews – now
Summer 2016 – to come
Photo: Ryan Hamilton
3. Energy and Water Use
Modeled:
11 kWh/m2/yr heating demand
43.0 kWh/m2/yr total (site) energy demand
119 kWh/m2/yr primary energy demand
3. Energy and Water Use
Monitored - TBD
Solar Output vs Predicted
Lessons Learned
Challenges with installing during construction
Install more sensors than needed
Expect more time than desired for startup
Different system for energy end use monitoring
Conclusions + Next Steps
Research questions:
Enclosure
Comfort
Energy and Water
What’s next?
