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 15, 2012
MBH Architects announces new appointments
MBH Architects continues to grow, take on new clients.
| Aug 15, 2012
Architects and designers challenged in Allsteel’s reality design competition
KITS mobile app offers flexibility in planning.
| Aug 14, 2012
Leo A Daly welcomes Carl Gentilcore
Gentilcore will be responsible for identifying, developing and managing client relations with key federal government agencies.
| Aug 14, 2012
SOM Foundation announces prize recipients for 2012
Submissions for the SOM Prize were received from students at 34 schools in the U.S.
| Aug 9, 2012
Slideshow: New renderings of 1 WTC
Upon its scheduled completion in early 2014, One World Trade Center will rise 1,776 feet to the top of its spire, making it the tallest building in the Western Hemisphere.
| Aug 9, 2012
Slideshow: New renderings of 1 WTC
Upon its scheduled completion in early 2014, One World Trade Center will rise 1,776 feet to the top of its spire, making it the tallest building in the Western Hemisphere.
| Aug 9, 2012
DSGW Architects welcomes new employees
Three new employees located in DSGW's Duluth office.
| Aug 9, 2012
DMR Architects converts bank building to municipal court
The project consisted of a $4 million renovation to a 2-story building totaling 13,000-sf.
| Aug 8, 2012
BD+C wins six B2B journalism awards
BD+C wins two national awards, three regional awards, and a regional Graphical Excellence award.
| Aug 8, 2012
BIM’s future up in the cloud
The AEC industry is on the cusp of a still more significant evolution with cloud computing.