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
| Sep 30, 2014
The Big Room concept: Using Building Team collocation to ensure project success
Implementing collocation via the Big Room concept will remove silos, ensure a cadence for daily communication, promote collaboration, and elevate your chances for success, write CBRE Healthcare's Stephen Powell and Magnus Nilsson.
| Sep 30, 2014
USGBC, Bank of America name recipients of 2014 Affordable Green Neighborhoods Grant Program
Eleven projects have been selected for the 2014 Affordable Green Neighborhoods grant program. Each will receive $31,000 and an educational package to support their pursuit of LEED for Neighborhood Development certification.
Sponsored | | Sep 30, 2014
What are you doing to win business and improve morale?? VDC Director Kris Lengieza shares ways to do both
Bluebeam's Sasha Reed sits down with Kris Lengieza, Director of Virtual Design and Construction for Stiles Corporation, to learn how he approaches change management. SPONSORED CONTENT
Sponsored | | Sep 30, 2014
How project managers can manage technology
Not long ago, the role of a construction project manager revolved around working with people: employees, vendors, consultants, designers, subcontractors and owners. Today, project managers primarily manage information. SPONSORED CONTENT
| Sep 30, 2014
With its 'stacked volumes' scheme, 3XN wins bid to design high-rise in Sydney
By dividing the 200-meter building into five separate volumes and placing atria throughout each volume, the spaces become smaller, more intimate social environments, according to the Danish architects.
| Sep 29, 2014
Living Building vs. LEED Platinum: Comparing the first costs and savings
Skanska USA's Steve Clem breaks down the costs and benefits of various ultra-green building standards and practices.
| Sep 29, 2014
10 common deficiencies in aging healthcare facilities
VOA's Douglas King pinpoints the top issues that arise during healthcare facilities assessments, including missing fire/smoke dampers, out-of-place fire alarms, and poorly constructed doorways.
| Sep 29, 2014
Snøhetta releases final plan for terraced central library in Calgary
The competition-winning New Central Library is now in the final design stages, after two years of community engagement on the part of design firms Snøhetta and DIALOG.
| Sep 25, 2014
Jean Nouvel unveils plans for National Art Museum of China
Of the design, Nouvel describes it as inspired by the simplicity of “a single brush stroke.”
Sponsored | | Sep 25, 2014
Your business doesn’t always need to change
By now, the idea that organizations must adapt to maintain both relevance and market share is so ingrained that it’s been reduced to pithy sayings. But is constant adaptation always the best policy? SPONSORED CONTENT