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
| Aug 20, 2014
WELL Building: The next step in green sports construction
The WELL Building Standard, a new protocol that focuses on human wellness within the built environment, is a particularly good fit for sports facilities, write Skanska's Tom Tingle and Beth Heider.
| Aug 20, 2014
Seattle's King Street Station thoughtfully restored [2014 Reconstruction Awards]
After years of neglect and botched renovations, King Street Station sparkles once again.
| Aug 20, 2014
Tour an office with no assigned workstations [slideshow]
The New York office of the Gerson Lehrman Group recently redesigned its office without personal desks or cubicles. The company gave each of its 250 employees a locker, a laptop, and told to work anywhere they wanted, according to Business Insider.
| Aug 20, 2014
Architecture Billings Index reaches highest mark since 2007
The American Institute of Architects reported the July ABI score was 55.8, up noticeably from a mark of 53.5 in June.
| Aug 19, 2014
Goettsch Partners unveils design for mega mixed-use development in Shenzhen [slideshow]
The overall design concept is of a complex of textured buildings that would differentiate from the surrounding blue-glass buildings of Shenzhen.
| Aug 19, 2014
HOK to acquire 360 Architecture
Expected to be finalized by the end of October, the acquisition of 360 Architecture will provide immediate benefits to both firms’ clients worldwide as HOK re-enters the sports and entertainment market.
| Aug 19, 2014
A designer's epiphany: 'Let's stop talking and make something'
Making things is important because it reveals gaps in thought, sheds light on the fundamental assumptions that can kill ideas, and forces us to push toward solutions that actually work, writes HDR's David Grandy.
| Aug 19, 2014
Construction boom lures new class of lenders in Nashville, says JLL
In the coming months, a gleaming S-shaped tower will join Nashville's burgeoning skyline. The new tower is just one example of a project financed not with conventional construction loans but with a unique blend of equity and debt.
| Aug 18, 2014
Perkins+Will expands planning practice with strategic focus on underserved U.S. communities
The broadened focus is resulting in comprehensive, long-term plans that will guide new growth in places like Buffalo, N.Y., Kingston, R.I., and Brooklyn, N.Y.
| Aug 18, 2014
SPARK’s newly unveiled mixed-use development references China's flowing hillscape
Architecture firm SPARK recently finished a design for a new development in Shenzhen. The 770,700 square-foot mixed-use structure's design mimics the hilly landscape of the site's locale.