Cut Energy Waste By Running Buildings Better – New Report

Most people know that new light fixtures can reduce energy waste in office buildings, but even the experts may be surprised to learn just how much energy can be saved by running office buildings better.

NRDC’s new report on Real Time Energy Management shows how one company reduced electricity expenses by about $220,000 in one year simply by catching “operational stray.” The Report provides a roadmap for owners and tenants to improve their buildings and save money with similar projects.

Large office buildings are complicated systems. Building equipment often will “stray” from optimum settings. For example:

  • Thermostats are adjusted for an evening meeting and not re-set to normal schedules, so the chiller runs at night for weeks.
  • A sensor breaks, causing fans or pumps to run full-speed when not needed.
  • A “bug” in software code causes an automated systems to start in the middle of the night.

These are normal events in the life of an office building. These problems must be expected to occur, even in the best buildings. The problem is not that “stray” occurs, but that it can persist undetected for months.

Catching “stray” quickly is the goal of real-time energy mangement. Doing so wastes less energy, saves money for owners and tenants, protects equipment from wear and tear, and makes for better buildings.

A case study in savings:

In our Report, we examine the project Tower Companies implemented in three large office buildings it owns and operates in downtown Washington, D.C.  Tower’s buildings were already high-performing buildings — two were Energy Star® buildings and the third was very close to receiving that rating before the project began!

In the first year of the project, Tower reduced electricity use by 23% in one building, 17% in another, and 7% in the third, for an average of 13% across all three buildings. Electricity expenses for these three buildings went down by about $220,000 in year.  All that in year 1 of the project.

These amounts probably understate the actual savings. The implemented measures will likely save energy beyond the study period we measured.  And Tower expects reduced maintenance expenses — that is, preventing a chiller from turning-on at night when it should stay off will lengthen the life of this expensive equipment, and running fans at lower speeds will reduce wear and tear on the machinery.

Study highlights energy-efficient buildings in Minnesota

The Great Plains Institute has compiled a list of all the Energy Star certified buildings in Minnesota, hoping to set a baseline of information and look for the progress being made in Minnesota toward resource saving.

Buildings that are Energy Star certified use 35 percent less energy than a typical commercial building, according to the report. Overall, Energy Star buildings save $2 billion in energy costs nationwide in more than 300,000 buildings that are tracked with Energy Star’s Portfolio Manager.

There are 561 Energy Star buildings in Minnesota ranging from schools and office buildings to warehouses and commercial buildings such as retail shops, banks and senior care facilities. And those buildings cover a total of 105 million square feet of space.

Trevor Drake, of the Great Plains Institute and one of the report’s authors, said earning an Energy Star rating can be tough. “The candidates need to enter 12 months of energy usage into Portfolio Manager, the EPA’s tracking tool,” he said. “Then, they need to have a professional engineer look at their data and verify the results.”

A score of 75 means that a building is more efficient than 75 percent of the 300,000 surveyed buildings. But only 20,000 buildings nationwide have earned Energy Star certification.

In Rochester, there are eight Energy Star buildings, with Cottagewood Senior Community—formerly Sunrise Cottages—a senior living facility earning a perfect 100 score in 2012. It was the second certification for the building; it earned a 98 in 2011.

 

Van Rompuy flags two million buildings efficiency jobs by 2020

The president of the European Council, Herman Van Rompuy, called on 9 October 2013 for a strategy to provide long-term emissions-cutting and money-saving deep renovations to Europe’s ageing building stock, saying that it could create two million jobs.

Van Rompuy used a video address to tell a conference organised by ‘Renovate Europe’, in Brussels that EU regulations obliging new properties to emit zero net carbon emissions by the next decade are not enough.

“Renovating existing buildings is also essential because 90% of them are here to stay,” he said.

“And deep renovation of existing buildings has also the potential to stimulate innovation, to improve health and to create about two million new direct jobs in the Union by 2020.”

The unusually forthright speech from an EU Council president known for his measured and unassuming approach, was hailed as “a strong statement by a strong player” by one former EU energy policy architect.

“For economies looking for a way to break this cycle of unemployment, this is a good place to start,” Randall Bowie, now an energy efficiency consultant with home insulation company Rockwool, told EurActiv. “They have a big building stock that needs to be renovated, the financing is now there, it is just a question of getting it mobilised.”

Europe’s building stock accounts for around 40% of EU primary energy consumption, and energy efficient ‘deep’ renovations for them could cut energy consumption by up to three quarters and slash bills by the same amount.

 

Green Energy Used To Build Bentleys – Hybrid Cars News

Bentley may not yet have a hybrid or a PHEV in its luxurious lineup, but it is now building its cars with lots of green, rooftop-sourced, energy. The solar panel project includes over 20,000 solar panels installed on the top of Bentley’s Crewe installations, the biggest of its kind in the UK.

The Bentley factory is where the brand’s three main model lines – Continental, Flying Spur and Mulsanne – are manufactured. “The solar panels have generated over 2,200,000 kilowatt-hour’s of energy since its installation in March, having a hugely positive impact on the efficiency and sustainability of our manufacturing operations,” said Michael Straughan, Bentley’s Member of the Board for Manufacturing. “We’re very proud of the project and so are delighted to welcome Greg Barker to the factory and share the information behind that success.”

New building code a win for energy efficiency, potential loss for utilities

Officials have approved an updated code to reduce energy waste in new homes, while overcoming attempts to roll back the current code’s energy-saving measures, passing a proposal known as RE-188, which adds a new optional compliance pathway to the 2015 International Energy Conservation Code (IECC).

The update allows an energy rating index (ERI), such as the Home Energy Rating System (HERS), to meet the code’s energy-saving goals instead of having to install many prescriptive energy-efficiency measures specified by the code. Approximately 40 percent of new homes are already rated using the HERS system.

“This is a huge win-win for new homeowners, builders, and for energy efficiency — our cheapest, cleanest resource,” said Meg Waltner, Natural Resources Defense Council’s manager for building energy policy. “This is a cost-effective approach that will help cut utility costs for homeowners, give greater flexibility to homebuilders in complying with the code, and create a stronger market for even more efficient homes by giving home buyers an MPG-like rating to compare the homes side by side.”
Read more: New building code a “win” for energy efficiency, potential loss for utilities – FierceEnergy http://www.fierceenergy.com/story/new-building-code-win-energy-efficiency-potential-loss-utilities/2013-10-14#ixzz2hv1VqIA0

NASA inspires launch of software for energy-efficient buildings

An interesting startup called Ekotrope is marketing web-based software that allows buildings to be analyzed as they are being designed and built.

It allows design options to be compared in minutes, cutting building construction costs 2 to 10 percent and resulting in buildings that are 40 percent more energy efficient. It’s also used for renovations.

It can analyze entire buildings during the design phase, comparing various component configurations to find the most cost-effective ways to reach the greatest energy efficiency. The software provides an interactive report of a building’s energy performance, allowing users to make real-time decisions and conduct what-if scenarios during planning and construction phases.

Designers also can drill down and analyze wall, roof and floor assemblies.

Step 1: Upload your design(s)

Step 2: Compare designs optimizing for construction cost, payback period or energy savings

Step 3: Choose design options that match the project’s goals

So far, Ekotrope has optimized about 700,000 square feet of building space in 11 states across the U.S.

Designers of a net-zero energy community in Florida used the software.

“When embarking on this new development it was crucial for us to fully understand all of the cost, energy and sustainability build options available to us in detail,” says Greg Thomas, managing member for Green Key Village LLC. “For each individual design plan, this meant considering more than 10,000 unique variables. We also want our buyers to be able to choose from 10 different, fully sustainable designs.”

Green Key Village found the software to be “amazingly sophisticated but easy-to-use, enabling us to intuitively review and compare a wide array of build and material options.”

MIT Aeronautics and Astronautics Professor Edward Crawley developed the software, drawing on NASA technology, because he was searching for help in designing an energy-efficient home. He wanted his architect to be able to analyze trade-offs in using various components to find the best energy and investment combination.

Recently, the Massachusetts-based company raised $1.7 million, bringing its total capital raise to $3 million. Part of that money came from the Massachusetts Clean Energy Center. The state-funded organization invests in Massachusetts clean energy companies to create local, high quality jobs while supporting them in reaching national markets.

A Fresh Set of Grades Measures Energy Use in Residential Buildings – New York Times

In its waning days, the Bloomberg administration is issuing a final batch of grades, this time to rate the energy use of the city’s largest residential buildings. This week, officials released energy consumption data for large multifamily buildings, allowing residents to find out how their co-ops, condos and rental buildings compare with similar structures.

It was the first time any city in the country publicized such data, environmental groups said, and will be one of the most prominent legacies of Mayor Michael R. Bloomberg’s environmental agenda. The city has been tracking energy use among its largest buildings under a 2009 law intended to help reduce the city’s greenhouse gas emissions, an issue that acquired added urgency after Hurricane Sandy.

The heating and cooling of buildings produces three-fourths of the city’s emissions contributing to global warming and sea level rise, city officials said; the 2009 law applies to the biggest energy consumers, buildings of more than 50,000 square feet and multiple-building properties with a total of more than 100,000 square feet.

Annual results for the city’s large office and government buildings have been released since 2011, using the scores under the federal Environmental Protection Agency’s Energy Star program. Residential buildings are not yet rated under that program, so city officials are using letter grades, just as they do with restaurants, to encourage improvements and to guide consumer decisions.

“The benefit is a more informed marketplace,” said Cliff Majersik, executive director of the Institute for Market Transformation, a nonprofit group in Washington that promotes building energy efficiency and advises the city on its rating efforts.

Mr. Majersik warned, though, that to identify the real underachievers, comparisons should be apples to apples. Walk-ups should be compared with walk-ups and luxury towers should be compared with luxury towers. The most efficient buildings use three to six times less energy than the power hogs, according to a report released by the mayor’s Office of Long-Term Planning and Sustainability to accompany the energy use data. This means enormous potential for energy savings, officials said, especially with multifamily buildings, which account for 76 percent of the more than 26,600 buildings covered by the law.

The energy use data, collected in 2011 with 75 percent of the buildings reporting, reveals some interesting patterns. It turns out that buildings built in the 1970s have the highest consumption levels compared with other vintages, especially compared with the structures built in the 1930s.

And in all five boroughs, the highest energy usage per square foot among ZIP codes tends to be in households with higher median incomes.

Architects and Building Engineers flock to NREL

Eight busloads of architects and mechanical engineers toured one of the world’s largest net-zero-energy office building this summer at the Energy Department’s National Renewable Energy Laboratory (NREL) and came away inspired with new ideas for how to design and build beautiful, eco-friendly structures on a budget.

Tickets for the tours sold out almost as fast as a Paul McCartney concert, the busloads another reminder of how professionals are embracing high-performance, energy-efficient buildings.

The premier professional organizations for architects and building engineers — the American Institute of Architects (AIA) and the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) — both held their national conferences in Denver this summer, within a few days of each other.

Denver is just 14 miles from Golden, the site of NREL’s main campus and its Research Support Facility (RSF), a 360,000-square-foot office building that Construction Digital Magazine last year named the top net-zero-energy building in the world. A group of NREL engineers including Sheila Hayter, Rachel Romero, and Shanti Pless organized the trips to NREL’s campus — and led tours with help from the architects at RNL and SmithGroup JJR and the contractors from JE Dunn and Haselden, who worked with NREL to design and build the RSF and the new Energy Systems Integration Facility (ESIF).

Busloads of architects and mechanical engineers recently toured the Energy Systems Integration Facility. Here, they view the high performance computing data center, which will house one of the world’s most energy-efficient super computers. The petascale system will be dedicated to energy efficiency and renewable energy research.
Credit: SmithGroup JJR/Bill Timmerman

“People were lining up at will call to get tickets to the tour,” said Angela Innes, marketing manager for JE Dunn Construction, the main contractor on the ESIF project. “We saw huge interest and got a lot of feedback from architects from all over the world.”

The AIA architects and ASHRAE engineers marveled at the energy efficiency and the aesthetics of the RSF, and some dropped their jaws when they learned it was built in 2010 and 2011 for no more than the average square-foot cost — $259 — of other office buildings in the Denver area. In addition, the engineers saw that using biomass to heat buildings is a viable option for saving greenhouse gases and viewed one of the most energy-efficient data centers in the world.

NREL Shows High Performance is Economical
“Designers of commercial buildings are serious about creating energy-efficient buildings,” said NREL’s Hayter, who chairs ASHRAE’s Planning Committee, is a past ASHRAE vice president, and previously served on the steering committee that developed the original charter for ASHRAE’s Advanced Energy Design Guideline (AEDG) series that shows the way toward achieving 30% or 50% greater efficiency or net-zero energy.

“The architects visiting NREL were pretty amazed at the design of the RSF. They are anxious to learn how to make energy-efficient decisions with a very limited budget — without sacrificing aesthetics,” Pless said. A full-day pre-convention workshop at the AIA conference gave architects the chance to do exactly that: make design decisions with an eye for energy efficiency. The workshop taught them how to use OpenStudio, an Energy Department tool developed at NREL, to evaluate the energy impact of early design decisions such as orientation, massing, fenestration, construction assemblies, and internal building activity. They created baseline energy models and then made what-if alternatives using energy conservation measures pulled from the online Building Component Library, another Energy Department tool developed at NREL.

“We sent 200 of our people to NREL. It was all sold out,” said Nicolle Thompson, director of programs and sponsorship for AIA Colorado. “It was extremely popular. There are so many great projects at NREL, and many of our members participated in building that campus. The RSF and ESIF are getting such national recognition. It’s not easy to build a net-zero building of that size economically. We wanted to show it off.”

Is Energy Storage Technology Truly Economical?

True or false: solar and wind power are freely available and clean, and thus should always be stored when they generate more energy than the grid can use? It’s easy to assume that renewable energy should never be turned off, but scientists at Stanford have done the math to find the break-even point where storing energy is better than “wasting,” or curtailing, that energy, and their findings aren’t necessarily as you’d think.

Though curtailing energy production results in an immediate energy loss, avoiding that loss through energy storage also requires an investment of energy, either through manufacturing batteries or building infrastructure. However, not all storage is the same, nor are the energy demands of creating wind and solar farms equivalent. By expressing all the energy in equivalent terms, the team could compare the return of energy garnered from solar and wind with the energy stored in batteries, per unit of energy required to build either (expressed as EROI for return of energy, and ESOI for the storage of energy).

utility-storage-cover

Because solar panels are more energetically expensive to produce than wind turbines, the EROI values differ by a factor of ten. When looking at various types of batteries, even more efficient flow batteries, all had much lower ESOI values than the geologic energy storage methods studied, which were compressed air energy storage and pumped hydroelectric storage.

Factoring in these differences, the study’s results show it’s currently always a better option to store solar energy because of the high energetic cost to recoup. However, the only storage options that are always better than curtailment of wind are geologic methods, with battery storage becoming better than curtailment depending on the fraction of energy being used in the grid instead of being stored or curtailed. In the graph below, you can read the ? in the bottom axis as representing that fraction. At the far right, if 100 percent of the energy is being curtailed or stored (i.e., none is going to the grid), then storing it is just barely a better option with any battery type. But at other rates it depends on the battery type.ll had much lower ESOI values than the geologic energy storage methods studied, which were compressed air energy storage and pumped hydroelectric storage.

It seems counter-intuitive that wind energy should be so cheap yet benefit in most cases from curtailment. But Michael Dale, one of the co-authors of the study, compared it to storing valuables in a safe. “You wouldn’t spend $100 on a safe to store a $10 watch,” he writes. In some situations it may even be preferable, in terms of energy expenditure, to build a new wind turbine rather than build storage for existing turbines.

The authors also make it plain that they’re condensing the question down to comparing one variable: the energetic trade-offs involved. But relying on economics alone avoids these considerations, and can even turn so-called green energy into the opposite. The authors calculated how much the life cycle of batteries would need to improve before becoming a viable option for wind – by a factor of two to 20, depending on the type of battery. But more importantly they also encourage the development of technologies that can use the otherwise curtailed energy in applications that aren’t harmed by being intermittent, such as systems to pump or purify water.

Sources: Stanford UniversityRoyal Society of Chemistry

 

Which U.S. Cities Rank High in Energy Efficiency?

While Congress dithers on energy efficiency, cities are moving ahead with energy-saving steps such as bike-sharing, tougher building codes, electric vehicle charging stations and cool roofs, says a study out Tuesday that ranks 34 major U.S. cities, According to USAToday.

Boston takes first place for its efforts to reduce energy use, followed by Portland, Ore., New York City, San Francisco, Seattle and Austin, according to the first-ever scorecard by the American Council for an Energy-Efficient Economy (ACEEE), a Washington-based research group.

What’s exciting is the quickening pace of these efforts, says lead author Eric Mackres. “Over the past five or so years, cities are rediscovering how important energy efficiency is to their economies,” he says, adding that federal Recovery Act funds helped them test potential solutions — some of which have since been adopted.

Capitol Hill is another story. Congress remains stalled on a bipartisan, cost-neutral bill that offers financial incentives, worker training, expert advice and other tools to help businesses adopt energy-efficient technologies. The bill passed a Senate committee earlier this year but is now stuck on the Senate floor, because lawmakers have attached controversial amendments that have nothing to do with energy efficiency.

“We may have to take the bill down,” said Senate Majority Leader Harry Reid, D-Nev.,noting unrelated amendments including one by Sen. David Vitter, R-La., to weaken President Obama’s health care reform law. The bill’s authors, Sens. Jeanne Shaheen, D-N.J., and Rob Portman, R-Ohio, had removed some provisions to avoid divisiveness, but acrimony ensued anyway.

Cities have picked up the slack. More are requiring buildings to disclose energy use so prospective renters can anticipate utility costs, helping low-income households make efficiency retrofits so they save money and toughening building codes so less energy is used.

More than a dozen cities have launched bike-sharing programs and about two dozen — including Atlanta, Houston and San Antonio — have installed EV charging stations in public areas. New York City, Houston and Chicago have each launched programs to plant 1 million trees citywide. At least 10 — including Dallas, Miami and Philadelphia — have policies to promote or require “cool roofs” to reduce how much solar heat a building absorbs.

The ACEEE scored the cities for their efforts in five areas: buildings, transportation, energy and water utility programs, local government operations and community-wide initiatives. While Boston got the highest overall score of 77, out of a maximum 100, Portland did best in transportation, Seattle in building policies and San Francisco (along with Boston) in utility benefit programs.

In its Renew Boston effort, Boston has partnered with investor-owned utilities to tell consumers about rate-payer financed incentives for buying energy-efficient appliances and making energy-saving retrofits.

“Environmental development goes hand in hand with economic development,” Boston Mayor Thomas Menino said at a press briefing on the scorecard. He says both benefit city residents, although officials need to learn “street” rather than “scientific” talk to help them understand how.

“Both business and the public are with us,” Portland Mayor Charlie Hales told reporters, adding they realize that energy efficiency is good for the environment as well as the bottom line.

The second-highest-scoring tier of cities, earning between 53 and 56 points, includes Washington, D.C., Minneapolis, Chicago, Philadelphia and Denver. The lowest-scoring cities were Detroit (19 points) and Jacksonville (17 points).

“All cities, even the highest scorers, have significant room for improvement,” the report says. Mackres says it ranked cities on their efforts rather than actual energy use, because data on the latter is incomplete and climate differences can affect how much energy cities use.

How U.S. cities rank on energy efficiency efforts

Rank..City……….Total score (Maximum 100)
1……Boston, MA…………….76.75
2……Portland,OR………….70.00
3……New York City………..69.75
3…..San Francisco, CA…. 69.75
5…..Seattle, WA…………… 65.25
6.. ..Austin, TX……………… 62.00
7…..Washington, DC…….56.00
8…..Minneapolis, MN……..55.25
9…..Chicago, IL………………54.75
10..Philadelphia, PA……. 54.50
11..Denver, CO……………. 52.75
12..Baltimore, MD…………46.50
13.Houston, TX……………. 45.25
14..Dallas, TX……………….44.25
15..Phoenix, AZ…………….43.50
16..Atlanta, GA…………….. 42.50
16..San Antonio, TX…….. 42.50
18..Sacramento, CA……. 40.75
19..Columbus, OH……… .38.50
20..San Diego, CA……….. 38.25
21..Riverside, CA…………. 37.25
21..San Jose, CA…………. 37.25
23..El Paso, TX……………. .36.25
23..St. Louis, MO……………36.25
25.. Pittsburgh, PA………. .34.25
26.. Fort Worth, TX………. .32.75
27.. Miami, FL……………… .32.00
28.. Los Angeles, CA……. 31.50
29.. Indianapolis, IN…….. .28.25
30.. Tampa, FL…………….. .26.75
31..Charlotte, NC…………. .23.75
32..Memphis, TN……………23.50
33..Detroit, MI………………. .19.00
34.. Jacksonville, FL………17.25