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 28, 2014
Post Tower Wins CTBUH 10-Year Award
The 10 Year Award recognizes proven value and performance in a tall building, across one or more of a wide range of criteria, over a period of 10 years since its completion.
| Jul 27, 2014
Maturing ‘plug and play’ sector could take market share from AEC Giants [2014 Giants 300 Report]
The growth of modular and containerized data center solutions may eventually hinder the growth of traditional data center construction services.
| Jul 27, 2014
Top Data Center Construction Firms [2014 Giants 300 Report]
Holder, Turner, and DPR head Building Design+Construction's 2014 ranking of the largest data center contractors and construction management firms in the U.S.
| Jul 27, 2014
Top Data Center Engineering Firms [2014 Giants 300 Report]
Fluor, Jacobs, and Syska Hennessy top Building Design+Construction's 2014 ranking of the largest data center engineering and engineering/architecture firms in the U.S.
| Jul 27, 2014
Top Data Center Architecture Firms [2014 Giants 300 Report]
Gensler, Corgan, and HDR head Building Design+Construction's 2014 ranking of the largest data center architecture and architecture/engineering firms in the U.S.
| Jul 25, 2014
Grocery stores choosing Green Globes for building sustainability certification
The Green Building Initiative (GBI) has announced a wave of Green Globes certifications for new grocery stores, including New Seasons Markets, Whole Foods, Price Chopper, Aldi’s, Harris Teeter, Wegmans, and Publix.
| Jul 24, 2014
SLATERPAULL Architects to merge with Hord Coplan Macht
The merger will create a full-service practice with offices in Baltimore, MD, Denver, CO and Alexandria, VA that offers integrated architecture, landscape architecture, interior design, planning and historic preservation services.
| Jul 24, 2014
MIT researchers explore how to make wood composite-like blocks of bamboo
The concept behind the research is to slice the stalk of bamboo grass into smaller pieces to bond together and form sturdy blocks, much like conventional wood composites.
| Jul 24, 2014
Glazing options in correctional and detention facilities
Like it or not, the number of incarcerated people in the U.S. continues to rise. With that, increased security in all aspects of these facilities continues to be a priority. This is where security glazing products that allow line of sight for supervisors to observe and still maintain secure separation can play a key role. SPONSORED CONTENT
| Jul 23, 2014
Holistic care model, regulatory changes make outpatient facilities a high priority [2014 Giants 300 Report]
With the Affordable Care Act still in its infancy, Building Teams are seeing reverberations in the investment decisions of healthcare providers, including new ideas about the types of buildings they are asked to create.