tom webster

University of California, Berkeley, Architecture, Center for the Built Environment, project scientist

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study the potential of buddhist practice to help with global warming mitigation and adaptation.
Address: Berkeley, California, United States

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Charlie Huizenga

University of California, Berkeley

Amanul Alam

Wilmer Pasut

University of California, Berkeley

Gan Kwang Yong

Fred Buhl

Tianzhen Hong

Lawrence Berkeley National Laboratory

Stefano Schiavon

University of California, Berkeley

Sonny Ramos

Yoon Soo (Yoonsu) Lee

University of Pennsylvania

Gail Brager

University of California, Berkeley

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Papers by tom webster

Analysis of a hybrid UFAD and radiant hydronic slab HVAC system

cbe.berkeley.edu

In this paper, an EnergyPlus simulation model was used to simulate the operation of a novel integ... more

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Cooling load design tool for UFAD systems

Center For the Built Environment, 2010

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Energy savings from extended air temperature setpoints and reductions in room air mixing

International Conference on Environmental Ergonomics 2009, Aug 2, 2005

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in UFAD Systems

Detailed Loop Model (DLM) analysis of liquid solar thermosiphons with heat exchangers

Solar Energy

An analytical Detailed Loop Model (DLM) has been developed to analyze the performance of solar th... more An analytical Detailed Loop Model (DLM) has been developed to analyze the performance of solar thermosiphon water heaters with heat exchangers in storage tanks. The model has been used to study the performance of thermosiphons as a function of heat exchanger characteristics, heat transfer fluids, flow resistances, tank stratification, and tank elevation relative to the collector. The results indicate that good performance can be attained with these systems compared to thermosiphons without heat exchangers.

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Whole-Building Energy Simulation of UFAD Systems

Commissioning the Underfloor Air Distribution (UFAD) System in the New York Times Building

Total building impacts of south-facing roof apertures

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Chiller Controls-related Energy Saving Opportunities in Federal Facilities

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Lessons Learned with Calibrating An Energy Simulation Model of a High Performance Hi-Rise Office Building

Cooling airflow design calculations for UFAD

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Thermosiphon water heaters with heat exchangers

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Influence of Supply Air Temperature on Underfloor Air Distribution (Ufad) System Energy Performance

Underfloor air distribution (UFAD) systems have received attention in recent years due to a numbe... more Underfloor air distribution (UFAD) systems have received attention in recent years due to a number of potential advantages over conventional overhead (OH) systems. These potential advantages include increased layout flexibility, improved indoor air quality and thermal comfort, and energy savings. In particular, energy performance advantages have been difficult to evaluate analytically due to the lack of simulation tools that accurately model the complex heat transfer processes of stratification in the room and "thermal decay" (supply air temperature gain) in the underfloor plenum. Furthermore, the impact of key design and operating parameters cannot be easily determined without such tools. Fortunately, EnergyPlus v3.1 and beyond now contain validated calculation modules suitable to model these UFAD systems (U.S. DOE 2010).

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A post-occupancy monitored evaluation of the dimmable lighting, automated shading, and underfloor air distribution system in The New York Times Building

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Trends in Energy Management Technology - Part 3: State of Practiceof Energy Management, Control, and Information Systems

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Trends in Energy Management Technology - Part 4: Review ofAdvanced Applications in Energy Management, Control, and InformationSystems

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Trends in Energy Management Technologies - Part 5: Effectivenessof Energy Management Systems: What the Experts Say and Case StudiesReveal

1 Here and throughout the report, we use BMS in a somewhat generalized way to represent a broad r... more

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Trends in Energy Management Technology: BCS Integration Technologies - Open Communications Networking

Note: Please refer to Appendix A for a complete listing of all acronyms and their definitions. 2 ... more Note: Please refer to Appendix A for a complete listing of all acronyms and their definitions. 2 * We do not attempt to distinguish individual OSI layers here, only indicate the various protocol suites that are used or under development for the particular architecture level shown. Parentheses indicate typical industrial process level designations.

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