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
Sponsored | BD+C University Course | May 10, 2022
Design guide for parapets: Safety, continuity, and the building code
This course covers design considerations for parapets. The modern parapet must provide fire protection, serve as a fall-protective guard, transition and protect the roof/facade interface, conceal rooftop equipment, and contribute to the aesthetic character of the building.
Sponsored | BD+C University Course | May 10, 2022
Designing smarter places of learning
This course explains the how structural steel building systems are suited to construction of education facilities.
Performing Arts Centers | May 10, 2022
A historic performance space is transformed to reinforce a campus’ Arts District
Connecticut College’s Athey Center for Performance and Research at Palmer Auditorium balances the old and new.
Market Data | May 10, 2022
Hybrid work could result in 20% less demand for office space
Global office demand could drop by between 10% and 20% as companies continue to develop policies around hybrid work arrangements, a Barclays analyst recently stated on CNBC.
Multifamily Housing | May 10, 2022
Multifamily rents up 14.3% in 2022
The average U.S. asking rent for multifamily housing increased $15 in April to an all-time high of $1,659, according to Yardi Matrix.
Headquarters | May 10, 2022
JPMorgan Chase’s new all-electric headquarters to have net-zero operational emissions
JPMorgan Chase’s recently unveiled plans for its new global headquarters building in New York City that is rife with impressive sustainability credentials.
Building Team | May 9, 2022
Cincinnati’s Andrew J Brady Music Center transforms the city’s riverfront
In Cincinnati, Ohio, the Andrew J Brady Music Center aims to connect audiences with live music while transforming Cincinnati’s riverfront.
Sponsored | Multifamily Housing | May 8, 2022
Choosing the right paver system for rooftop amenity spaces
This AIA course by Hoffmann Architects offers best practices for choosing the right paver system for rooftop amenity spaces in multifamily buildings.
Market Data | May 6, 2022
Nonresidential construction spending down 1% in March
National nonresidential construction spending was down 0.8% in March, according to an Associated Builders and Contractors analysis of data published today by the U.S. Census Bureau.
Building Team | May 6, 2022
Atlanta’s largest adaptive reuse project features cross laminated timber
Global real estate investment and management firm Jamestown recently started construction on more than 700,000 sf of new live, work, and shop space at Ponce City Market.