Deep energy retrofit

Deep energy retrofit

A deep energy retrofit is a building retrofit approach that uses integrative design to improve the economics of efficiency and achieve much larger energy savings than conventional energy retrofits. Deep energy retrofits can be applied to both residential and non-residential (“commercial”) buildings. A deep energy retrofit typically results in savings of 30 percent or more, perhaps spread over several years, and may significantly improve the building value.[1]

The term "deep energy retrofit" is often used interchangeably with "deep green retrofit" and "deep retrofit". A deep green retrofit may have less focus on energy efficiency and may emphasize obtaining certification from a green building rating system, such as LEED. The definition of the term continues to be refined and debated.[2]

Contents

Deep Energy v. Conventional Energy Retrofits

Conventional energy retrofits focus on isolated system upgrades (i.e. lighting and HVAC equipment). These retrofits are generally simple and fast, but they often miss opportunity for saving more energy cost-effectively.[3]

Deep energy retrofits achieve much greater energy efficiency by taking a whole-building approach, addressing many systems at once. It is most economical and convenient to take this approach on buildings with overall poor efficiency performance, with multiple systems nearing the end of useful life, and perhaps other reasons.[4]

Energy Efficiency Measures

A deep energy retrofit combines energy efficiency measures such as energy efficient equipment, air sealing, moisture management, controlled ventilation, insulation, and solar control so that dramatic energy savings are achieved alongside optimal building performance.

Durability, good interior air quality and energy efficiency are attained by sound building science practices. In a deep energy retrofit, filling a wall cavity with effective insulation also requires careful consideration of how that wall will dry if moisture does happen to get past its skin. Using very high R-value insulation systems on the exterior of the building enclosure is often one of the hallmarks of a deep energy retrofit. Where exactly the dewpoint will fall in (or out) of those thickened walls—and in what climate zone—becomes crucial. Careful detailing, flashing and air sealing of windows and other building penetrations is also key to a successful deep energy retrofit.

Systems thinking is required for these kinds of retrofits, where highly efficient windows are "tuned" to their orientation, and mechanical systems and heat recovery ventilation units are sized and integrated with how the walls, roof and basement are being air sealed, moisture-managed and insulated.

Process

A Level III energy audit, as defined by ASHRAE, is required in order to complete a commercial building deep energy retrofit. Also known as an investment grade audit, this type of energy audit features analysis of the interactions between efficiency strategies and their life cycle cost[5] . Upon selection and implementation of measures, the energy savings are verified using the International Performance Measurement and Verification Protocol.[6]

Tools

Deep energy retrofits make use of energy modeling tools such as eQUEST and life cycle cost analysis tools that integrate with an organization’s pro forma or other financial decision making mechanisms.

Ratings

A building that has undergone a deep energy retrofit is well positioned for a green building rating such as LEED and the building energy efficiency ratings described at BuildingRating.org.

Benefits

There have been a number of studies done to determine and quantify the benefits afforded to owners, tenants, and various other stakeholders from the successful completion of deep energy retrofits.

Common owner related benefits include:

  • reduced costs through energy savings
  • higher rent premiums[7]
  • increased occupancy rates[8]
  • marketing and public relations value[9]
  • improved community stature.[9]

Common benefits to tenants include:

  • increased productivity[10]
  • higher retail sales[11]
  • reduced employee sick days[12]
  • enhanced ability to attract and retain employees[9]
  • improved community stature[13]
  • reduced churn[13]
  • higher student test scores[11]

Notable Case Studies

The Empire State Building

The Empire State Building is undergoing a deep energy retrofit process that is projected to be completed in 2013. Upon completion, the project team, consisting of representatives from Johnson Controls, Rocky Mountain Institute, Clinton Climate Initiative, Jones Lang LaSalle, and NYSERDA will have achieved an annual energy use reduction of 38% and $4.4 million.[14]

A notable achievement of the project is that instead of replacing the chillers as originally planned, the design team were able to first reduce the building’s required cooling capacity by 1600 tons, allowing for a chiller retrofit instead of replacement which would have been $17.3 million more in capital costs.[13]

The Indianapolis City-County Building

The City-County Building recently underwent a deep energy retrofit process that is projected to be completed in September 2011. Upon completion, the project team, consisting of representatives from the Indianapolis Marion County Building Authority, Indianapolis Office of Sustainability, Rocky Mountain Institute, and Performance Services will have achieved an annual energy reduction of 46% and $750,000 annual energy savings.

The Byron Rogers Federal Building

The Byron Rogers office building is an historic high-rise office building located in Denver. Projected to be completed in 2013 with LEED platinum status. Upon completion, the 494,000-square-foot (45,900 m2) building will have reduced it’s energy usage by over 60%[13]

Other Examples

A 2011 report by New Buildings Institute for BetterBricks, a Northwest Energy Efficient Alliance initiative, lists 50 commercial building retrofit projects that save at least 30% of the building energy using a whole-systems approach.[15]

See also

References

  1. ^ jeancarassus.zumablog.com/images/2128_uploads/Fuerst_New_paper.pdf
  2. ^ http://www.energycircle.com/blog/2010/03/11/what-deep-energy-retrofit-experts-nesea-conference-respond
  3. ^ Zhai, John; Nicole LeClaire, Michael Bendewald (In Press). "Deep energy retrofit of commercial buildings: a key pathway toward low-carbon cities". Future Science: 6. 
  4. ^ http://www.retrofitdepot.org/TimingDeepEnergyRetrofit_More
  5. ^ Sud, Ish; John Cowan, Richard Pearson (2004). Procedures for Commercial Building Energy Audits. Atlanta, Ga.: American Society of Heating, Refrigerating and Air-Conditioning Engineers. ISBN 1931862206. 
  6. ^ http://www.evo-world.org
  7. ^ http://www.rics.org/site/scripts/download_info.aspx?downloadID=19&fileID=5763
  8. ^ http://www.rics.org/site/scripts/download_info.aspx?fileID=5749&categoryID=523
  9. ^ a b c http://www.deloitte.com/view/en_US/us/article/c25da0ba406fb110VgnVCM100000ba42f00aRCRD.htm
  10. ^ James, Greg Kats, principal author ; Jon Braman & Michael (2010). Greening our built world : costs, benefits, and strategies. Washington, DC: Island Press. ISBN 9781597266680. 
  11. ^ a b http://www.h-m-g.com/downloads/Daylighting/order_daylighting.htm
  12. ^ http://www.resourcesmart.vic.gov.au/for_businesses_3661.html
  13. ^ a b c d http://retrofitdepot.org
  14. ^ http://esbnyc.com/sustainability_energy_efficiency.asp
  15. ^ www.betterbricks.com/sites/default/files/nbi_neea_deep_savings_search_phase_1_final.pdf

Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Zero-energy building — BedZED zero energy housing in the UK A zero energy building, also known as a zero net energy (ZNE) building, Net Zero Energy Building (NZEB), or Net Zero Building, is a popular term to describe a building with zero net energy consumption and zero …   Wikipedia

  • Energy policy of the United States — The energy policy of the United States is determined by federal, state and local public entities in the United States, which address issues of energy production, distribution, and consumption, such as building codes and gas mileage standards.… …   Wikipedia

  • Seismic retrofit — Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. Other retrofit techniques are applicable to areas subject to tropical cyclones,… …   Wikipedia

  • Renewable energy in Scotland — The production of renewable energy in Scotland is an issue that has come to the fore in technical, economic, and political terms during the opening years of the 21st century. [See for example: Scottish Executive (2005) Choosing Our Future:… …   Wikipedia

  • Eastern span replacement of the San Francisco — San Francisco – Oakland Bay Bridge (eastern span replacement) Artistic rendition of the new eastern span of the Bay Bridge seen from Treasure Island (ca. 2014) Official name To be determ …   Wikipedia

  • Hayward Fault Zone — The Hayward Fault Zone is a geologic fault zone capable of generating significantly destructive earthquakes. About 60 kilometers long, it lies mainly along the western base of the hills on the east side of San Francisco Bay. It runs through… …   Wikipedia

  • Oakland, California — Oakland redirects here. For other uses, see Oakland (disambiguation). Oakland   City   City of Oakland …   Wikipedia

  • Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …   Wikipedia

  • Electric vehicle battery — Further information: Rechargeable electricity storage system For the starting, lighting and ignition system battery of an automobile, see Automotive battery. A Mitsubishi i MiEV having its batteries installed in Japan …   Wikipedia

  • F-16 Fighting Falcon — infobox Aircraft name= F 16 Fighting Falcon caption=A USAF F 16 over Iraq after refueling, 2008 type= Multirole fighter national origin = United States manufacturer= General Dynamics Lockheed Martin first flight= 2 February avyear|1974… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”