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
Giants 400 | Aug 9, 2017
Top 100 Architecture/Engineering Firms
Stantec, HOK, and CallisonRTKL are among the nation’s largest architecture/engineering firms, according to Building Design+Construction’s 2017 Giants 300 Report.
Contractors | Aug 4, 2017
4 ways to prepare for a negotiation
Practice, practice, practice, and understanding both sides of the deliberation are critical to success in any negotiation.
Laboratories | Aug 3, 2017
Today’s university lab building by the numbers
A three-month study of science facilities conducted by Shepley Bulfinch reveals key findings related to space allocation, size, and cost.
Lighting | Aug 2, 2017
Dynamic white lighting mimics daylighting
By varying an LED luminaire’s color temperature, it is possible to mimic daylighting, to some extent, and the natural circadian rhythms that accompany it, writes DLR Group’s Sean Avery.
Healthcare Facilities | Aug 2, 2017
8 healthcare design lessons from shadowing a nurse
From the surprising number of “hunting and gathering” trips to the need for quiet spaces for phone calls, interior designer Carolyn Fleetwood Blake shares her takeaways from a day shadowing a nurse.
Sponsored | Architects | Aug 2, 2017
Are visual ergonomics the new key to project delivery?
An Australian Home Theater Company is out to prove that the easier you can see it, the easier you can sell it.
Multifamily Housing | Jul 27, 2017
Apartment market index: Business conditions soften, but still solid
Despite some softness at the high end of the apartment market, demand for apartments will continue to be substantial for years to come, according to the National Multifamily Housing Council.
Multifamily Housing | Jul 27, 2017
Game rooms and game simulators popular amenities in multifamily developments
The number of developments providing space for physical therapy was somewhat surprising, according to a new survey.
Building Enclosure Systems | Jul 26, 2017
Balcony and roof railings and the code: Maintain, repair, or replace? [AIA course]
Lacking familiarity with current requirements, some owners or managers complete a roof or balcony rehabilitation, only to learn after the fact that they need to tear noncompliant railings out of their new roof or terrace and install new ones.
Office Buildings | Jul 26, 2017
Meeting space leads to innovation
PDR Principal Larry Lander explains how to design for workplaces where four generations are working together.