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Durham School of Architectural Engineering and Construction: Faculty Publications
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Full-Text Articles in Architecture
Performance Review Of Indoor Noise Criteria, Lily M. Wang, Erica Eileen Bowden
Performance Review Of Indoor Noise Criteria, Lily M. Wang, Erica Eileen Bowden
Durham School of Architectural Engineering and Construction: Faculty Publications
Currently there are a number of indoor noise criteria used to quantify the level of background noise in rooms, including Noise Criteria (NC), Balanced Noise Criteria (NCB), Room Criteria (RC), Room Criteria Mark II (RC Mark II) and others. This paper reviews the pros and cons of each of these and then compares the values measured in existing classrooms in the Omaha area. The authors are in the process of subjectively comparing these various criteria to determine which method best correlates with human perception. The subjective testing methods and preliminary results are discussed.
“Predictive Optimal Control Of Active And Passive Building Thermal Storage Inventory”, Gregor P. Henze, Moncef Krarti
“Predictive Optimal Control Of Active And Passive Building Thermal Storage Inventory”, Gregor P. Henze, Moncef Krarti
Durham School of Architectural Engineering and Construction: Faculty Publications
Cooling of commercial buildings contributes significantly to the peak demand placed on an electrical utility grid. Time-of-use electricity rates encourage shifting of electrical loads to off-peak periods at night and weekends. Buildings can respond to these pricing signals by shifting cooling-related thermal loads either by precooling the building’s massive structure or the use of active thermal energy storage systems such as ice storage. While these two thermal batteries have been engaged separately in the past, this project investigates the merits of harnessing both storage media concurrently in the context of predictive optimal control.
The analysis, modeling, and simulation research presented …
Implementation Of The Laboratory Air Handling Unit Systems (Lahu), Y. Cui, Mingsheng Liu, K. Conger
Implementation Of The Laboratory Air Handling Unit Systems (Lahu), Y. Cui, Mingsheng Liu, K. Conger
Durham School of Architectural Engineering and Construction: Faculty Publications
The LAHU system has been designed, installed, and commissioned in a large university research building. This paper provides detailed information about the demonstration project, including the specific LAHU system mechanical design, optimal airflow control schedules, and measured LAHU energy and indoor air quality (IAQ) performance. The measured energy and IAQ performance are also compared with the conventional operation and theoretical predicated values.
Integrated Chiller System Reduce Building Operation And Maintenance Costs In Cold Climates, N. Sheets, Mingsheng Liu
Integrated Chiller System Reduce Building Operation And Maintenance Costs In Cold Climates, N. Sheets, Mingsheng Liu
Durham School of Architectural Engineering and Construction: Faculty Publications
Although water-cooled chillers are more energy efficient than air-cooled chillers, a majority of chilled water systems use air-cooled chillers. In cold weather climates, air-cooled chillers are capable of functioning in low ambient temperatures with few operational concerns, where as water-cooled chiller systems must be equipped to prevent cooling tower freezing. The integrated chiller system attempts to take advantage of each chiller’s strengths and eliminate any cold weather operational concerns. An integrated chiller system includes a cooling tower and air-cooled condenser. During the summer, both the cooling tower and air condenser can be operated. In cold weather, the cooling tower is …
Development Of By-Pass Blending Station System, Mingsheng Liu, D. Barnes, K. Bunz, N. Rosnberry
Development Of By-Pass Blending Station System, Mingsheng Liu, D. Barnes, K. Bunz, N. Rosnberry
Durham School of Architectural Engineering and Construction: Faculty Publications
A new building blending station system named by-pass blending station (BBS) has been developed to reduce building pump energy consumption in both district heating and cooling systems. Theoretical investigation demonstrated that the BBS can significantly reduce building pump power for a typical cooling system when constant water flow is maintained in the building side. When differential pressure reset is applied in the building side, more pump energy can be saved. The BBS also reduces the pump size and therefore results in lower initial system cost. A case study was also performed and demonstrated 42% of annual chilled water pump energy …
Improving Building Control And System Operation Through The Continuous Commissioning® Process: A Case Study, Nathan Redmann, Mingsheng Liu
Improving Building Control And System Operation Through The Continuous Commissioning® Process: A Case Study, Nathan Redmann, Mingsheng Liu
Durham School of Architectural Engineering and Construction: Faculty Publications
Utilization of the Continuous Commissioning® process is presented in the case of the Consolidated Mission Support Center office building at Travis Air Force Base in Travis, California. The CC® process was applied to the building in early 2003. The examination of the heating, ventilating, and airconditioning (HVAC) and control systems revealed several areas where considerable improvement could be made, including air handling unit (AHU) operational parameters, terminal box and water loop operation, and Energy Management and Control System (EMCS) functionality. It also aided in the identification of mechanical systems needing repair. The optimization of the HVAC systems and …
Acoustic Communication In Panthera Tigris: A Study Of Tiger Vocalization And Auditory Receptivity, Edward J. Walsh, Lily M. Wang, Douglas L. Armstrong, Thomas Curro, Lee G. Simmons, Joann Mcgee
Acoustic Communication In Panthera Tigris: A Study Of Tiger Vocalization And Auditory Receptivity, Edward J. Walsh, Lily M. Wang, Douglas L. Armstrong, Thomas Curro, Lee G. Simmons, Joann Mcgee
Durham School of Architectural Engineering and Construction: Faculty Publications
To adults and children alike, tigers are one of the best-known members of the animal kingdom. It may be surprising, then, to learn that we have a lot to discover about their hearing and the acoustics of their vocalizations. To help fill in the gaps in our knowledge, we are in the midst of a study that is focused on the characterization of the vocal properties and hearing capabilities of a subset of surviving tiger subspecies, namely the Siberian, Bengal, Sumatran and the Indochinese tigers. We are hoping that our findings will not only add to a deeper understanding of …