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High Performance Manufactured Homes

High Performance Manufactured Homes. Project Sponsor: Bonneville Power Administration Presentation by: Ben Larson, Ecotope and Tom Hewes, Northwest Energy Works. Provisional UES Proposal Presentation to the Regional Technical Forum May 15, 2012. Overview / Review.

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High Performance Manufactured Homes

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  1. High Performance Manufactured Homes Project Sponsor: Bonneville Power Administration Presentation by: Ben Larson, Ecotope and Tom Hewes, Northwest Energy Works Provisional UES Proposal Presentation to the Regional Technical Forum May 15, 2012

  2. Overview / Review • Measure first presented at last RTF meeting (4/17/2012) • Discussed baseline, energy use / savings, and costs • Lacked complete plan to move measure from provisional to active status • This presentation reviews last month’s and concludes with a plan

  3. Measure Summary • Measure name: High Performance Manufactured Homes (HPMH) • Measure sponsor: Bonneville Power Administration • Measure description: • Construction of new, manufactured homes in accordance with the High Performance Manufactured Home Specification Measure type: UES • Requesting Status: Approved • Change in measure status: Yes (proposed  provisional) • Change in measure savings: No • Change in measure cost effectiveness: No • Other or follow-on work for RTF: No

  4. Review: Uo Baseline Specifications • “HUD+” is the current NW baseline based on current market research by WSU and NEW • The “HUD+” baseline is a better performer than the Federal standard due to decades of market transformation in the PNW • All costs and savings are made relative to the “HUD+” baseline

  5. Manufactured Homes Specifications Review

  6. UES Analysis SummaryRefer to Measure Workbook

  7. Analysis Approach (1) • Lighting calculated with LPD method • Appliance savings from existing RTF measures • Calibrated SEEM runs for estimating • heating, cooling, ventilation, and DHW • DHW energy use • Parallel analysis to HPWH presented in 2011

  8. Analysis Approach (2) • Heating, cooling, ventilation, and DHW energy use calculated with SEEM • DHP Modelingmethodology from NEEA Ductless Heat Pump Impact & Process Evaluation: Field Metering Report • Field findings: DHP heats differing house fraction based on climate • HZ1: 74%, HZ2: 63%, HZ3: 45% • Calibrated SEEM to pre/post DHP installation periods at 91 houses • Unique simulations created for each house based on detailed audits • Note: energy uses here not reflective of DHP program savings – they are only applicable here as a calibration exercise • HPWH Modelingbased on SEEM simulated annual crawl space temperature profile and HPWH COP map • HPWH installed in sound-attenuated, buffered closet which draws air from crawl space and exhausts outdoors

  9. Modeled Crawl Space Air Temperature • Crawl space is source of air for HPWH closet • SEEM model of 1568 ft2 HPMH • 4.5 ACH crawl (350 cfm continuous) • likely worst case airflow and temperature – the air in the closet will be warmer due to tank heat loss • R38 floor, no ducts

  10. Measure Cost by Category • Sunset Criteria: • Measure shall sunset at the end of 2014, at which time the lighting savings UES component of the measure shall be reevaluated against the changing federal lighting standards.

  11. Results

  12. Energy Use, Savings, and B/C Ratio

  13. Energy Use by Load • Significant reductions in space heating, water heating, and lighting over both “HUD+” baseline and NEEM. • Big savings from • wall sheathing, • triple-glazed windows, • DHPs, • HPWH, and • lighting improvements

  14. Moving from Provisional to Active Status • Open analytical questions include DHP and HPWH savings • Shell, lighting, and appliance all use previously approved analyses • The RTF and other regional organizations are already pursuing questions related to DHP (due soon) & HPWH (due a bit later) savings • Efforts should result in enough information to model DHPs and HPWHs in manufactured houses • Special question regarding HPWH inlet air temperature – • air drawn from crawlspace into HPWH closet and then exhausted outside • Proposed plan to measure temperature at 10 sites: • crawl space, outside, & HPWH closet temperature • select sites across heating zones • measurements will inform inlet temperature for modeling • After DHP & HPWH analyses have been resolved; HPWH inlet air T measured; and Federal Lighting standards updated, the measure will be revised and moved to active status.

  15. Motion for Approval “I _________ move that the RTF approve the UES for High Performance Manufactured Homes with provisional status which will sunset at the end of 2014.”

  16. Contacts • Northwest Energy Works Tom Hewes tom@northwestenergyworks.com 888.370.3277 x101 Brady Peaks brady@northwestenergyworks.com 888.370.3277 x102 • Bonneville Power Administration Mark Johnson mejohnson@bpa.gov 503.230.7669 • Ecotope Ben Larson ben@ecotope.com 206.322.3753 x207

  17. Extras Follow

  18. SEEM Modeled: • 4.5 ACH in Crawl • HPMH Spec Floor • (no ducts, R38) • TMY3 Data:

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