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
| Apr 8, 2014
Understanding value billing vs. conventional billing
Every company is a sum of the value it delivers to its clients. What differs from one company to the next is how that value is delivered and perceived. All too often, it is based solely on the fee you charge.
| Apr 8, 2014
Science, engineering find common ground on the Northeastern University campus [slideshow]
The new Interdisciplinary Science and Engineering Building is designed to maximize potential of serendipitous meetings between researchers.
| Apr 8, 2014
40 Under 40 winners: Meet the contractors
Of the up-and-coming AEC professionals to be named to the class of 2014, nine make their living as contractors.
| Apr 7, 2014
40 Under 40 winners: Meet the architects
Of the up-and-coming AEC professionals to be named 40 Under 40 winners by the editors of Building Design+Construction, 21 make their living in the architecture profession.
| Apr 4, 2014
$25 million Orion Jet Center designed by SchenkelShultz now open
As the centerpiece of the 45-acre campus, which is its first phase of a planned 215-acre mixed-use development, the 18,000 square foot executive terminal facility offers spacious passenger areas, administrative space, an executive suite, rental car kiosk, catering and a cafe.
| Apr 3, 2014
Security, accountability, and cloud access: Can you really have it all?
I’ve heard countless stories of conversations between project engineers and IT professionals who can’t come to an agreement on the level of security needed to protect their data while making it more accessible—not only externally, but also internally.
| Apr 2, 2014
The new model of healthcare facility management
A growing number of healthcare organizations are moving to an integrated real estate model in an effort to better manage costs, respond to regulatory requirements, and support changes in patient care delivery.
| Apr 2, 2014
8 tips for avoiding thermal bridges in window applications
Aligning thermal breaks and applying air barriers are among the top design and installation tricks recommended by building enclosure experts.
| Apr 2, 2014
Check out the stunning research facility just named 2014 Lab of the Year [slideshow]
NREL's Energy Systems Integration Facility takes top honors in R&D Magazine's 48th annual lab design awards.
| Apr 1, 2014
The risks of mismatched fire-rated assemblies
Mismatched fire-rated glass and framing happens more often than you think. Failing to confirm that the tested and listed performance capabilities of the framing system match those of the glazing can create a financial nightmare for the entire building team.