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
| Jan 31, 2011
Cuningham Group Architecture launches Healthcare studio with Lee Brennan
International design firm Cuningham Group Architecture, P.A. (Cuningham Group) has announced the arrival of Lee Brennan, AIA, as Principal and Leader of its new Healthcare studio. Brennan comes to Cuningham Group with over 30 years of professional experience, 22 of those years in healthcare, encompassing all aspects of project delivery, from strategic planning and programming through design and construction. The firm’s new Healthcare studio will enhance Cuningham Group’s expertise in leisure and entertainment, education, mixed-use/housing and workplace environments.
| Jan 31, 2011
HDR Architecture Releases Evidence-based Design Videos
As a follow-up to its book Evidence-based Design for Healthcare Facilities, HDR Architecture, Inc. has released three video case studies that highlight evidence-based design principles in action.
| Jan 31, 2011
CISCA releases White Paper on Acoustics in Healthcare Environments
The Ceilings & Interior Systems Construction Association (CISCA) has released an extensive white paper “Acoustics in Healthcare Environments” for architects, interior designers, and other design professionals who work to improve healthcare settings for all users. This white paper serves as a comprehensive introduction to the acoustical issues commonly confronted on healthcare projects and howbest to address those.
| Jan 28, 2011
Firestone Building Products Unveils FirestoneRoof Mobile Web App
Firestone Building Products Company unveiled FirestoneRoof, a first-of-its-kind free mobile web app. The FirestoneRoof mobile web app enables customers to instantly connect with Firestone commercial roofing experts and is designed to make it easier for building owners, facility managers, roofing consultants and others charged with maintaining commercial roofing systems to get the support they need, when they need it.
| Jan 27, 2011
Perkins Eastman's report on senior housing signals a changing market
Top international design and architecture firm Perkins Eastman is pleased to announce that the Perkins Eastman Research Collaborative recently completed the “Design for Aging Review 10 Insights and Innovations: The State of Senior Housing” study for the American Institute of Architects (AIA). The results of the comprehensive study reflect the changing demands and emerging concepts that are re-shaping today’s senior living industry.
| Jan 25, 2011
Bloomberg launches NYC Urban Tech Innovation Center
To promote the development and commercialization of green building technologies in New York City, Mayor Michael R. Bloomberg has launched the NYC Urban Technology Innovation Center. This initiative will connect academic institutions conducting underlying research, companies creating the associated products, and building owners who will use those technologies.
| Jan 25, 2011
Top 10 rules of green project finance
Since the bottom fell out of the economy, finding investors and financial institutions willing to fund building projects—sustainable or otherwise—has been close to impossible. Real estate finance prognosticators, however, indicate that 2011 will be a year to buy back into the real estate market.
| Jan 25, 2011
Chicago invented the skyscraper; can it pioneer sustainable-energy strategies as well?
Chicago’s skyline has always been a source of pride. And while few new buildings are currently going up, building owners have developed a plan to capitalize on the latest advances: Smart-grid technologies that will convert the city’s iconic skyline into what backers call a “virtual green generator” by retrofitting high-rise buildings and the existing electrical grid to a new hyper-connected intelligent-communications backbone.
| Jan 25, 2011
AIA reports: Hotels, retail to lead U.S. construction recovery
U.S. nonresidential construction activity will decline this year but recover in 2012, led by hotel and retail sectors, according to a twice-yearly forecast by the American Institute of Architects. Overall nonresidential construction spending is expected to fall by 2% this year before rising by 5% in 2012, adjusted for inflation. The projected decline marks a deteriorating outlook compared to the prior survey in July 2010, when a 2011 recovery was expected.