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 9, 2014
ABC economist predicts continued construction industry growth in 2015
In his latest report, ABC's Chief Economist Anirban Basu forecasts nonresidential construction spending to expand by roughly 7.5% next year, led by the power, lodging, office, and manufacturing sectors.
| Dec 8, 2014
How brick and mortar enables online retail
According to a shopping preferences study conducted by A.T. Kearney, as many as two-thirds of shoppers go to a physical store before or after making an online purchase, writes Gensler's Jill Nickels.
| Dec 8, 2014
The year’s boldest BIM/VDC themes
High-speed rendering software, custom APIs, virtual reality tools, and BIM workflow tips were among the hottest BIM/VDC topics in 2014.
| Dec 8, 2014
AEC firms upbeat about financial results, 2015 looking rosier [exclusive BD+C survey]
The market outlook is brighter for U.S. architecture, engineering, and construction companies, with a majority of AEC firms reporting higher revenues, strong forecasts, and sound financial health, according to BD+C's annual Market Forecast Survey.
| Dec 8, 2014
The global sanitation crisis leads to 2.5 million deaths every year
When we see the incredible technology being produced by global plumbing manufacturers, it’s hard to conceive why no viable technical solution to the global sanitation issue has come forth, writes BD+C's Robert Cassidy.
| Dec 8, 2014
Moshe Safdie wants to reinvent airports with Jewel Changi Airport addition
A new addition to Singapore's Changi Airport, designed by Moshe Safdie, will feature a waterfall and extensive indoor gardens.
| Dec 6, 2014
Future workplace designs shouldn’t need to favor one generation over another, says CBRE report
A new CBRE survey finds that what Millennials expect and need from offices doesn’t vary drastically from tenured employees.
| Dec 5, 2014
Plotting on the go: 3D-printed mechanical compass can print CAD drawings with high precision
Design student Ken Nakagaki has adapted a device to work with CAD software to replicate digital files on paper.
Sponsored | | Dec 5, 2014
New construction outlook report projects growth in 2015
A new 2015 construction outlook report predicts that total U.S. construction starts for 2015 will rise 9% to $612 billion. SPONSORED CONTENT
