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Steve White Lloyd Potter Jeffrey Jordan Lila Valencia Carlos Valenzuela PowerPoint Presentation
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Characterization of Household Residential Energy Consumption Using a Housing Unit Archetype Framework. Steve White Lloyd Potter Jeffrey Jordan Lila Valencia Carlos Valenzuela. Introduction.

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slide1
Characterization of Household Residential Energy Consumption Using a Housing Unit Archetype Framework

Steve White

Lloyd Potter

Jeffrey Jordan

Lila Valencia

Carlos Valenzuela

introduction
Introduction
  • Understanding the energy efficiency of housing units is important for targeting conservation efforts.
  • Type of construction, age, and size of a housing unit are expected to result in variation in household energy consumption patterns.
method
Method
  • County tax appraisal district data (housing unit characteristics) and local energy company data (source KBTUs in gas and electricity consumption for each unit in 2010) are used.
  • Analysis restricted to dwellings occupied over the year. Housing units are distributed into a 100 cell grid (Table 1) based on vintage (year built) and size (square feet of living area).
consumption efficiency
Consumption efficiency
  • Examined as follows :
  • The median source KBTUs for each of the 100 Vintage by Size categories were calculated.
  • SKBTU's for the 100 were ranked from highest to lowest.
  • Consumption categories were assigned as follows:
  • Tier 1 - Rank = 1-25: Lowest Efficiency
  • Tier 2 - Rank = 26-50: Moderate-Low Efficiency
  • Tier 3 – Rank = 51-75: Moderate-High Efficiency
  • Tier 4 – Rank = 76-100: Highest Efficiency
slide7

Housing Unit Examples

2

1977

1,384

1

1932

942

4

2008

3,117

3

1985

1675

refinement of other characteristics
Refinement of Other Characteristics.
  • The archetype grid can be further refined to include details. Using foundation types:
  • Pier and beam is less efficient across all tiers.
  • Pier and beam housing units have lower improvement values across all tiers.
  • In the first three tiers, based on median year built, pier and beam housing units are 23 or more years older than slab housing units.
  • In tier 4, housing units (built between 1987 and 2010), pier and beam is almost non-existent.
refinement of tiers
Refinement of Tiers

Subdivision of the four tiers based on additional vintage, size, and consumption details. Original four tiers subdivided into 16 archetypes based on:

  • Reducing the number and narrowing the range for vintages.
  • Deriving 'Small' and 'Large' size categories within each new vintage category.
  • Deriving 'High' and 'Low' SKBTU consumption categories by size and by vintage
conclusion
Conclusion
  • Older, smaller houses are less energy efficient.
  • An archetype framework has significant potential for targeting housing units with specific conservation efforts.