©2012 This excerpt taken from the article of the same name which appeared in ASHRAE Journal, vol. 54, no. 10, October 2012
By Mike J. Lawless, Associate Member ASHRAE
About the Author
Mike J. Lawless is project executive at KJWW Engineering Consultants in St. Louis
The University of Wisconsin-Stout (UW-Stout) in Menonomie, Wis., educates its future engineers and scientists in Jarvis Hall, which houses a science wing, a technology wing and a science addition that was constructed in 2010. The new addition uses a dual-duct VAV system and an energy recovery chiller to save energy.
The original 75,000 ft2 (6968 m2) Jarvis Hall, built in 1970, was completely modernized as part of this remodel and addition project. An 11,000 ft2 (1022 m2) building on the West side of the existing Jarvis Hall was removed and replaced with a new 15,000 ft2 (1394 m2) tiered classroom addition. The addition was built above the existing basement mechanical room, which remained in operation throughout the project. This project also included a 60,000 ft2 (5574 m2) laboratory addition located to the East of the existing Jarvis Hall. The laboratory addition included routing all mechanical piping from the existing basement, through the existing, operational Jarvis Hall space, and to new mechanical equipment in the addition. The completed 150,000 ft2 (13 935 m2) building is comprised of classrooms, offices, and laboratories for both research and education.
This project was phased (Figures 1 and 2) so that the existing Jarvis Hall building remained active until the additions were complete. Once complete, the additions were occupied while the existing building was renovated. This limited the loss of classroom space on campus and allowed laboratory spaces to be active throughout the project.
The resulting building provided high energy efficiency, in line with the university’s visions and goals, and set a new standard for efficiency among laboratory facilities.
As shown in Table 1, Jarvis Hall uses 30% less energy than ASHRAE/IESNA Standard 90.1-2004 and 64% less than the Labs 21 benchmark. Labs 21 is a voluntary partnership program dedicated to improving the environmental performance of U.S. laboratories.
The State of Wisconsin Department of State Facilities budgeted this project based on its extensive experience with construction of lab buildings. The systems described were provided within the original budget. A central plant was built several years prior to the construction of Jarvis Hall with approximately 350 tons (1231 kW) allotted for the completed building, but based on the final program, this was not enough capacity. The use of heat wheels to reduce the peak cooling capacity allowed the project to use the existing chiller plant without needing to add another chiller. A system was provided that saves $125,000/year in energy consumption compared to Standard 90.1-2004 within the original budget and avoided the cost of adding capacity in the central plant to support the project.
An energy recovery chiller was added in Jarvis Hall to provide year-round cooling for the vivarium and aquatic housing. This allowed the campus to maintain its energy-saving process of shutting down the central chilled water plant on weekends and during the winter.
The use of the energy recovery chiller and energy recovery wheels provides year-round cooling to meet the needs of the facility and reduces campus central plant boiler and chiller operation.
The energy savings of the actual building compared to the Standard 90.1-2004 baseline results in an annual greenhouse gas emissions savings of 2,940 tons of carbon dioxide, 88 lbs (40 kg) of methane and 97 lbs (44 kg) of nitrous oxide.
Citation: ASHRAE Journal, vol. 54, no. 10, October 2012
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