Terranova Ranch in Fresno, Calif., grows more than 25 different crops on 6,000 acres. The company, which started in 1981, has focused its attention lately on methods that keep its soil, water, and air quality as healthy and sustainable as possible.
The design for Terranova Ranch’s new office pavilion is the first net-zero carbon and net positive energy project by Paul Halajian Architects (PHA), and the client’s design choices were informed by the use of cove.tool’s web-based building performance app.
Terranova Ranch’s aimed for a 100 percent reduction in operational carbon emissions, and the architect provided several options toward meeting or exceeding that goal. (Cove.tool shared some of the details of this case study with BD+C.)
GOING BEYOND CODE MINIMUMS
Initially, the energy model for the 5,800-sf office building was designed to follow code minimum baseline assumptions from California’s Title 24, version 2019, which offered a carbon reduction of 12 percent. PHA’s project architect conducted several analyses on possible improvements to reduce the overall Energy Use Intensity (EUI), which in this model was 42.52 kBtu/sf/year.
These analyses measured the impacts of the building’s HVAC, lighting, equipment, hot water, fans, and pumps. The first proposed design change was an envelope upgrade, from the mandatory minimum of R-19 to R-30 by adding two inches of Expanded Polystyrene (EPS) foam board to the exterior walls; and three inches of foam board insulation to the roof, which increased its R-value from 30 to 41. These changes would increase the building’s overall carbon reduction in base design to 20 percent and reduce the EUI to 38.
GLAZING’S BENEFITS DIDN’T PENCIL
The second option the architect investigated for Terranova Ranch combined the proposed envelope upgrade with improved glazing using Solarban 72 Acuity glass or Starphire glass with a u-value of 0.28 and solar heat coefficient of 0.28. (The baseline requirement is Solarban 60.) However, using cove.tool analysis tool, the architect determined that the whole-building EUI would have only reduced to 37, and only increased the carbon reduction by 2 percent from the first option. There were also cost considerations that made the glazing option less favorable.
The third upgrade option explored introduced 2,200 sf of monocrystalline solar panels, angled at a 15-degree incline atop a shaded parking structure. This option would reduce the building’s carbon emissions by 84 percent (from option No. 2’s 22 percent) and decrease the EUI to 7 form 37. Terranova Ranch was enthusiastic about this option.
A fourth alternative explored introducing heat recovery by adding an energy recovery ventilator in the ceiling. This option allowed for a carbon reduction of 103 percent and an EUI score of negative 1.5. The client agreed to move forward in the building’s design with each option except the glazing upgrade.
SUNLIGHT EXPOSURE WILL REDUCE BUILDING’S LIGHTING NEEDS
Along with the energy study, the architect conducted other analyses. Using cove.tool software, the architect observed that 85 percent of the office building’s interior would have access to “quality exterior views,” which in turn would earn the product LEED Views Credit. A daylight analysis of the architect’s design also showed that the building would be exposed to up to 12 hours of sunlight per day, reducing the design’s artificial lighting requirement.
While most clients might not be as sustainably inclined as Terranova Ranch, conducting data-driven analyses can be fruitful as a common practice that allows the design team and client to delve into different design scenarios to achieve an intended performance goal.
Construction on the office pavilion was scheduled to begin in late spring. The architect and client did not disclose construction costs.
Related Stories
| Nov 5, 2014
Survey: More than 75% of workload takes place without face-to-face interactions
With the rise of technology, much of the workday—even the most productive morning hours—is spent corresponding via email or conference call, according to a recent survey of corporate workers by Mancini•Duffy.
| Nov 4, 2014
HOK breaks ground on colossal research complex for LG in Seoul
Located in Seoul’s Magok District, the LG Science Park provides facilities to support innovative research and industrial prototyping. HOK designed phase one of the master plan and six of the laboratory and office buildings.
| Nov 3, 2014
Cairo's ultra-green mixed-use development will be topped with flowing solar canopy
The solar canopy will shade green rooftop terraces and sky villas atop the nine-story structure.
| Oct 30, 2014
New hotel to be developed at future Dallas Cowboys World Headquarters
The Omni property will be one of the only full-service upscale hotels in the area, and serve as a cornerstone of the mixed-use development, which will be anchored by the Dallas Cowboys World Headquarters and Frisco’s Multi-Use Event Center.
| Oct 29, 2014
Better guidance for appraising green buildings is steadily emerging
The Appraisal Foundation is striving to improve appraisers’ understanding of green valuation.
| Oct 27, 2014
Davis, Calif., latest city to join race to develop 'innovation hubs'
The city plans to develop two "innovation centers" with a total of seven million sf of commercial space geared for local research and technology companies.
| Oct 24, 2014
Work in the City: Urban Diversificaton
As work and the other aspects of our lives blend, lifestyle becomes the primary lens through which all facets come into focus. In this light, individuals are taking more ownership of their own life and work choices.
| Oct 24, 2014
Herzog & de Meuron reveals plans for redesign of Roche pharmaceutical campus in Germany
The project includes the addition of a 205-meter-high tower and research center, as well as the renovation of an historic office building designed by Swiss architect Otto R. Salvisber.
Sponsored | | Oct 23, 2014
From slots to public safety: Abandoned Detroit casino transformed into LEED-certified public safety headquarters
First constructed as an office for the Internal Revenue Service, the city's new public safety headquarters had more recently served as a temporary home for the MGM Casino. SPONSORED CONTENT
| Oct 23, 2014
China's 'weird' buildings: President Xi Jinping wants no more of them
During a literary symposium in Beijing, Chinese President Xi Jinping urged architects, authors, actors, and other artists to produce work with "artistic and moral value."