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
| Jul 16, 2012
BD+C Under 40 Leadership Summit scheduled
Attendee registration for U40 Summit II now open.
| Jul 16, 2012
Construction spending at 2 ½ year peak
Construction economist Ken Simonson says that four private nonresidential categories each posted 12-month spending increases of more than 25%: power and energy construction, 35%; hotels, 29%; educational and manufacturing, 27% apiece.
| Jul 16, 2012
Chen named design director at Heery
Chen comes to Heery from his own firm, Mark Chen Architect, a design and planning consulting firm, based in New York City, whose recent work includes large-scale planning studies for mixed-use projects.
| Jul 16, 2012
Reed Construction hires new project manager
Fread is a LEED AP and received his degree from Purdue University.
| Jul 16, 2012
Business school goes for maximum vision, transparency, and safety with fire rated glass
Architects were able to create a 2-hour exit enclosure/stairwell that provided vision and maximum fire safety using fire rated glazing that seamlessly matched the look of other non-rated glazing systems.
| Jul 12, 2012
New firm RSK Avanti Partners offers market development services
Full-service consulting firm is focused on working with product manufacturers, designers, specifies and contractors in the building construction market.
| Jul 12, 2012
Chicago Public Schools names Lend Lease team as construction manager
Under this Capital Improvement Program, the Lend Lease team will be responsible for renovation and life safety work at over 100 Chicago Public Schools across the City.
| Jul 12, 2012
Cramer joins Gilbane’s NYC Business Development Team
New Business Development Manager brings over 30 years of experience to Gilbane.
| Jul 12, 2012
Cardoso joins Margulies Perruzzi Architects
Senior architect brings experience, leadership to firm’s healthcare practice.
| Jul 12, 2012
EE&K and Knutson Construction selected for the Interchange in Minneapolis
Design-build contract for $79.3 million transportation hub will connect transit with culture.
