A misperception about computational fluid dynamics is that it is only effective when designing a jet plane, a formula one car, or an outer space rocket. Today, building designers can apply the same basic principles in fluid dynamics tested on these exotic high-flyers to common building airflows.
Here are three reasons why you might consider CFD for your next building project.
1. Best guess approach — Although guided by ASHRAE standards, current HVAC specs are usually “best guesses” based on experience with various equipment and designs. Most engineers oversize HVAC units because they just don’t “know” exactly where thermal differentials including cyclic variations, radiant temperature asymmetries, and drafts will happen in an operating building. Using CFD insight, you can right-size HVAC solutions to eliminate redundant equipment and save costs.
2. BIM modeling is standard — The widespread adoption of BIM has led to an unprecedented ability to model new designs. Now, engineers and designers routinely run time and light studies, finite element analyses and energy efficiency studies working with the BIM model. The extension of a building model to CFD analysis is not the leap it may have been ten years ago. Now, airflow designers can run through a number of scenarios for ventilation and heating using different strategies inside the actual building model.
5 benefits of CFD analysis
1. Assess ventilation effectiveness before construction
2. Eliminate equipment redundancy
3. Weigh equipment costs against performance and environmental requirements
4. Substantiate performance claims
5. Locate supply/return for optimal airflow
3. Seeing is believing — CFD analyses produce easy to understand visuals that show the impact of design alternatives, allowing architects to move walls, alter service conduit pathways and change glazing effects—among other things—to improve energy efficiency and occupant comfort. These visuals are crucial in explaining to owners the impact of design changes, airflow strategies and or equipment purchases. When everyone can easily grasp the results of the sophisticated math behind CFD, you can reach agreement more quickly and with a higher level of confidence.
Typically, designers do not have the time, knowledge or technology to perform a CFD analysis. The alternative is to work with outsourced CFD experts to generate the best airflow strategy for your project. The key here is to find the right fit. Make sure your CFD supplier has a demonstrated range of experience with the kind of building you are designing.
Your CFD partners should recognize precisely how to properly model an environment to reveal key performance insights—thermal stratification and restricted flows, for example. In addition, your CFD consultant should be collaborative—working with the design team to explore options for improvement.
No matter what kind of project you are designing—a new manufacturing plant, a new residential building or healthcare institution, or a retrofit of a landmark office complex—a proper CFD analysis will save money in initial capital costs and far more over time in building operating and energy costs. As a designer, you can provide your client with a better, less expensive solution.
About the Author
Jason Pfeiffer is Director CFD Analysis Consulting with IMAGINiT Technologies. He can be reached at jpfeiffer@rand.com.
Related Stories
| May 30, 2013
The Make It Right squabble: ‘How many trees did you plant today?’
A debate has been raging in the blogosphere over the last few months about an article in The New Republic, “If You Build It, They Might Not Come,” in which staff writer Lydia DePillis took Brad Pitt’s Make It Right Foundation to task for botching its effort to revitalize the Lower Ninth Ward of New Orleans.
| May 30, 2013
5 tips for running a successful BIM coordination meeting
BIM modeling tools are great, but if you can't run efficient, productive coordination meetings, the Building Team will never realize the benefits of true BIM coordination. Here are some helpful tips for making the most of coordination meetings.
| May 29, 2013
Realtors report positive trends in commercial real estate market
Realtors who practice commercial real estate have reported an increase in annual gross income for the third year in a row, signaling the market is on the road to recovery.
| May 29, 2013
6 award-winning library projects
The Anacostia Neighborhood Library in Washington, D.C., and the renovation of Cass Gilbert’s grand Beaux-Arts library in St. Louis are among six projects to be named 2013 AIA/ALA Library Building Award winners.
| May 28, 2013
LED lighting's risks and rewards
LED lighting technology provides unique advantages, but it’s also important to understand its limitations for optimized application.
| May 28, 2013
Minneapolis transit hub will double as cultural center [slideshow]
The Building Team for the Interchange project in downtown Minneapolis is employing the principles of "open transit" design to create a station that is one part transit, one part cultural icon.
| May 24, 2013
James Turrell's art installation turns Guggenheim Museum into 'skyspace'
James Turrell, an artist whose projects are more properly defined as "light sculptures," will have a major installation at the Guggenheim Museum this summer, turning Frank Lloyd Wright's famed serpentine atrium into a show of shifting colors and textures. The site-specific project, Aten Reign, will run from June 21 to September 25.
| May 24, 2013
First look: Revised plan for Amazon's Seattle HQ and 'biodome'
NBBJ has released renderings of a revised plan for Amazon's new three-block headquarters in Seattle. The proposal would replace a previously approved six-story office building with a three-unit "biodome."
| May 23, 2013
Supertall 'Sky City' will house 4,400 families in Changsha, China
Broad Sustainable Building has completed a long and arduous approval process, and is starting excavation and construction on Sky City in June, 2013. The proposed "world's tallest building" will be a mixed-use project that could accommodate life and work needs of up to 30,000 people.
