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 19, 2012
HGA Architects & Engineers moves offices in San Francisco
HGA’s San Francisco office has grown by nearly 25% in the past two years, adding shared expertise to the 120-person California practice, which includes the Sacramento and Los Angeles offices.
| Sep 19, 2012
Sasaki opens office in Shanghai
Office supports firm’s present and future work in China, throughout Asia.
| Sep 18, 2012
MBMA partners with ORNL for whole building energy efficiency study
The results are intended to advance energy efficiency solutions for new and retrofit applications.
| Sep 18, 2012
MKK opens office in North Dakota
MKK is currently working on seven projects in North Dakota, including a hotel, restaurant, truck stop, office building, and apartment complex.
| Sep 18, 2012
Firestone Building Products launches new website
Deep product information and innovative customer support tools are highlights.
| Sep 13, 2012
Leo A Daly Company promotes Kraskiewicz to senior vice president
Kraskiewicz, who most recently served as chief operations officer for the Leo A Daly division, will guide brand management, business development, operations and financial performance for 18 offices worldwide.
| Sep 13, 2012
Acentech adds audiovisual expertise to Trevose, Penn. office
Artese focuses on advising, overseeing, and maintaining the client’s vision for the project from the initial kick-off meeting to the final commissioning of the completed systems.
| Sep 13, 2012
Margulies Perruzzi Architects completes office design for Pioneer Investments
MPA updated the office design and additional support space consisting of five floors at Pioneer’s Boston office located at 60 State Street.
| Sep 12, 2012
Harvesting new ways to eliminate waste at the USDA
After installing 20 high-speed, energy-efficient hand dryers in restrooms throughout the USDA headquarters; the USDA reports seeing an immediate 50% reduction in the use of paper towels.
| Sep 11, 2012
RTKL appoints Lance Hosey as Chief Sustainability Officer and Senior Vice President
Author and authority on green design to spearhead RTKL Performance-driven DesignSM initiative.