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
| Oct 27, 2014
Top 10 green building products for 2015
Among the breakthrough products to make BuildingGreen's annual Top-10 Green Building Products list are halogen-free polyiso insulation and a high-flow-rate biofiltration system.
| Oct 27, 2014
Studio Gang Architects designs residential tower with exoskeleton-like exterior for Miami
Jeanne Gang's design reinvents the Florida room with shaded, asymmetrical balconies.
| Oct 26, 2014
New York initiates design competition for upgrading LaGuardia, Kennedy airports
New York Gov. Andrew Cuomo said that the state would open design competitions to fix and upgrade New York City’s aging airports. But financing construction is still unsettled.
| Oct 26, 2014
Study asks: Do green schools improve student performance?
A study by DLR Group and Colorado State University attempts to quantify the student performance benefits of green schools.
Sponsored | | Oct 24, 2014
Infographic: 5 key considerations for securing modular workspace
Keep these five considerations in mind for your next project that may benefit from modular space. SPONSORED CONTENT
| Oct 24, 2014
Herzog & de Meuron reveals plans for redesign of Roche pharmaceutical campus in Germany
The project includes the addition of a 205-meter-high tower and research center, as well as the renovation of an historic office building designed by Swiss architect Otto R. Salvisber.
Sponsored | | Oct 23, 2014
From slots to public safety: Abandoned Detroit casino transformed into LEED-certified public safety headquarters
First constructed as an office for the Internal Revenue Service, the city's new public safety headquarters had more recently served as a temporary home for the MGM Casino. SPONSORED CONTENT
| Oct 23, 2014
Santiago Calatrava-designed church breaks ground in Lower Manhattan
Saturday marked the public "ground blessing" ceremony for the Saint Nicholas National Shrine, the Greek Orthodox Church destroyed on 9/11 by the collapse of the World Trade Center towers.
| Oct 23, 2014
Prehistory museum's slanted roof mimics archaeological excavation [slideshow]
Mimicking the unearthing of archaeological sites, Henning Larsen Architects' recently opened Moesgaard Museum in Denmark has a planted roof that slopes upward out of the landscape.
| Oct 23, 2014
China's 'weird' buildings: President Xi Jinping wants no more of them
During a literary symposium in Beijing, Chinese President Xi Jinping urged architects, authors, actors, and other artists to produce work with "artistic and moral value."