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 18, 2013
Top Local Government Sector Construction Firms [2013 Giants 300 Report]
Turner, Clark Group, PCL top Building Design+Construction's 2013 ranking of the largest local government sector contractor and construction management firms in the U.S.
| Jul 18, 2013
Top Local Government Sector Engineering Firms [2013 Giants 300 Report]
STV, URS, AECOM top Building Design+Construction's 2013 ranking of the largest local government sector engineering and engineering/architecture firms in the U.S.
| Jul 18, 2013
Top Local Government Sector Architecture Firms [2013 Giants 300 Report]
Stantec, HOK, IBI Group top Building Design+Construction's 2013 ranking of the largest local government sector architecture and architecture/engineering firms in the U.S.
| Jul 18, 2013
Top State Government Sector Construction Firms [2013 Giants 300 Report]
PCL, Clark Group, Turner top Building Design+Construction's 2013 ranking of the largest state government sector contractor and construction management firms in the U.S.
| Jul 18, 2013
Top State Government Sector Engineering Firms [2013 Giants 300 Report]
Jacobs, AECOM, URS top Building Design+Construction's 2013 ranking of the largest state government sector engineering and engineering/architecture firms in the U.S.
| Jul 18, 2013
Top State Government Sector Architecture Firms [2013 Giants 300 Report]
Stantec, Perkins+Will, HNTB top Building Design+Construction's 2013 ranking of the largest state government sector architecture and architecture/engineering firms in the U.S.
| Jul 18, 2013
Top Federal Government Sector Construction Firms [2013 Giants 300 Report]
Clark Group, PCL, Hensel Phelps top Building Design+Construction's 2013 ranking of the largest federal government sector contractor and construction management firms in the U.S.
| Jul 18, 2013
Top Federal Government Sector Engineering Firms [2013 Giants 300 Report]
Fluor, URS, AECOM top Building Design+Construction's 2013 ranking of the largest federal government sector engineering and engineering/architecture firms in the U.S.
| Jul 18, 2013
Top Federal Government Sector Architecture Firms [2013 Giants 300 Report]
HOK, SmithGroupJJR, PageSoutherlandPage top Building Design+Construction's 2013 ranking of the largest federal government sector architecture and architecture/engineering firms in the U.S.
| Jul 18, 2013
Top Government Sector Construction Firms [2013 Giants 300 Report]
Clark Group, Turner, PCL head Building Design+Construction's 2013 ranking of the largest government sector contractors and construction management firms in the U.S.