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
| Dec 27, 2014
'Core-first' construction technique cuts costs, saves time on NYC high-rise project
When Plaza Construction first introduced the concept of "core first" in managing the construction of a major office building, the procedure of pouring concrete prior to erecting a steel frame had never been done in New York City.
| Dec 23, 2014
5 tech trends transforming BIM/VDC
From energy modeling on the fly to prefabrication of building systems, these advancements are potential game changers for AEC firms that are serious about building information modeling.
| Dec 22, 2014
What Building Teams can learn from home builders' travails
Commercial and residential construction can be as different as night and day. But as one who covered the housing industry for nearly a decade, I firmly believe AEC firms can learn some valuable lessons from the trials and tribulations that home builders experienced during the Great Recession, writes BD+C's John Caulfield.
| Dec 22, 2014
Skanska to build Miami’s Patricia and Phillip Frost Museum of Science
Designed by Grimshaw Architects, the 250,000-sf museum will serve as an economic engine and cultural anchor for Miami’s fast-growing urban core.
| Dec 22, 2014
Studio Gang to design Chicago’s third-tallest skyscraper
The first U.S. real-estate investment by The Wanda Group, owned by China’s richest man, will be an 88-story, 1,148-ft-tall mixed-use tower designed by Jeanne Gang.
| Dec 19, 2014
Zaha Hadid unveils dune-shaped HQ for Emirati environmental management company
Zaha Hadid Architects released designs for the new headquarters of Emirati environmental management company Bee’ah, revealing a structure that references the shape and motion of a sand dune.
| Dec 19, 2014
Chicago Architecture Biennial to hold 'Lakefront Kiosk Competition'
The first Chicago Architecture Biennial will take place from October 2015-January 2016, with a theme of "The State of the Art of Architecture."
| Dec 18, 2014
Frank Lloyd Wright's Taliesin West to be recreated—with LEGO
Containing more than 180,000 LEGO bricks in 11 colors and 120 different shapes, the model measures eight by four feet and is made entirely of standard LEGO parts.
| Dec 18, 2014
11 new highs for tall buildings: CTBUH recaps the year's top moments in skyscraper construction
The Council on Tall Buildings and Urban Habitat cherrypicked the top moments from 2014, including a record concrete pour, a cautionary note about high-rise development, and two men's daring feat.
| Dec 18, 2014
International Parking Institute and Green Parking Council collaborate with GBCI
The new collaboration recognizes importance of sustainable parking facility design and management to the built environment.