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
75 Top Building Products | Dec 16, 2019
Top Glass and Glazing Products for 2019
SageGlass's Harmony dynamic glass and Vitro Architectural Glass's Acuity low-iron glass are among the nine new glass and glazing products to make Building Design+Construction's 2019 101 Top Products report.
75 Top Building Products | Dec 16, 2019
Top Flooring Products for 2019
Tarkett’s aviation-inspired flooring collection and J+J Flooring’s textile composite flooring are among the four new commercial flooring products to make Building Design+Construction’s 2019 101 Top Products report.
75 Top Building Products | Dec 16, 2019
Top Building Systems Products for 2019
FabricAir’s ceiling-hung fabric duct and Ellumi Lighting’s bacteria-killing lights are among the 13 new building systems products to make Building Design+Construction's 2019 101 Top Products report.
75 Top Building Products | Dec 12, 2019
Top Building Envelope Products for 2019
Sto's beetle-inspired exterior coating and Dörken Systems' UV-resistant vapor-permeable barrier are among the 28 new building envelope products to make Building Design+Construction's 2019 101 Top Products report.
Architects | Dec 10, 2019
Calling all emerging architects: Enter to win the $20,000 Forge Prize
This annual steel design competition will recognize three Finalists ($10,000 each) and one Grand Prize Winner ($20,000 total) for their novel concepts in steel-based structures. Entries are due Jan. 15, 2020.
Architects | Dec 9, 2019
Jonathan Moody promoted to CEO of Moody Nolan
New four-member Executive Team also named.
Big Data | Dec 4, 2019
AEC data's coming out party
AEC firms are finally putting to use project information they’ve been storing in their computers for years.
Building Owners | Dec 2, 2019
What building owners and AEC teams need to know about New York’s Climate Mobilization Act
On April 18, 2019, the New York City Council passed the Climate Mobilization Act, a suite of laws aimed to meet the city’s commitment to achieving carbon neutrality by 2050.
| Nov 26, 2019
Steinberg Hart and Holzman Moss Bottino Architecture combine to elevate design, expand opportunities and strengthen client relationships
This union creates a national architecture firm with enhanced design capabilities and expertise.
| Nov 8, 2019
Philadelphia architecture firm EwingCole acquires Baltimore firm Gaudreau
Philadelphia architecture firm EwingCole acquires Baltimore firm Gaudreau.