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
| Apr 26, 2012
Blackney Hayes Architects launches new engineering division
The new division, BHH Engineers, will be led by Mark Hershman, PE.
| Apr 26, 2012
Energy efficiency requirements heighten the importance of proper protection for roofing systems
Now more than ever, a well-insulated and well protected roof is critical in new or renovated commercial buildings.
| Apr 26, 2012
Orange County, Fla. high school receives NAIOP “Public Development of the Year” award
School replacement designed by SchenkelShultz Architecture and constructed by Williams Co.
| Apr 25, 2012
Bubble skyscraper design aims to purify drinking water
The Freshwater Skyscraper will address the issue of increasing water scarcity through a process known as transpiration
| Apr 25, 2012
Thornton Tomasetti/Fore Solutions provides consulting for Biologics Support Center
Project receives LEED Gold Certification.
| Apr 25, 2012
McCarthy introduces high school students to a career in construction
High school students from the ACE Mentoring Program tour the new CHOC Children’s Patient Tower in Orange, Calif.
| Apr 25, 2012
Missner Group names McCrory VP of property management
McCrory will be responsible for overseeing the financial and operational needs of the firm’s commercial real estate portfolio which includes more than two million square feet of property.
| Apr 25, 2012
Rogers joins Morgan/Harbour as senior project manager
Rogers will also manage the construction process and daily activities as well as act as the interface between the subcontractors, owners, municipalities and regulatory agencies
| Apr 25, 2012
J.C. Anderson selected for 50,000-sf build out at Chicago’s DePaul University
The build-out will consist of the construction of new offices, meeting rooms, video rooms and a state-of-the-art multi-tiered Trading Room.
| Apr 24, 2012
ULI Real Estate Consensus Forecast, projects improvements for the real estate industry through 2014
Survey is based on opinions from 38 of the nation’s leading real estate economists and analysts and suggests a marked increase in commercial real estate activity, with total transaction volume expected to rise from $250 billion in 2012 to $312 billion in 2014.