Office plan of ceiling fan study site

CBE Research on Ceiling Fans May Help Tackle Future Global Challenges

It’s exciting when we have the opportunity to experience new sustainable buildings first hand. Last week, while attending the CHESC conference at UC Santa Barbara, along with other attendees I stayed in newly completed student housing designed to meet LEED Platinum standards. While these attractive new buildings exhibit many sustainable features, at times the natural ventilation scheme was not sufficient to maintain comfortable conditions, especially when it was necessary to lower blinds for privacy, or to close windows to block noise from the street and some late night volleyball games.

However, a simple and cost-effective addition to these units would have kept us all comfortable: ceiling fans. CBE research has quantified what we all know intuitively, that fans can provide acceptable comfort at temperatures that otherwise would be stifling. This enables passive solutions in milder climates, and may reduce the reliance on air conditioning in climates where passive solutions alone are not sufficient.  Read more

CBE and Engineering Leader Sanken to Collaborate on Radiant Cooling Technologies

This April, CBE welcomed to its consortium Sanken, a Japan-based engineering leader that will collaborate with researchers at CBE and overseas on radiant cooling technologies. This new collaboration builds on Sanken’s efforts that span several decades to innovate and provide customers with reliable and advanced systems and facilities. Read more

CBE human subjects test for ankle draft

New Capabilities for the CBE Thermal Comfort Tool

An important goal at the Center for the Built Environment is to provide tools to assist industry professionals to create energy efficient and comfortable buildings. To this end, in 2013 we first launched the online CBE Thermal Comfort Tool  as a way to help practitioners predict thermal comfort in buildings, according to the primary industry standard, ASHRAE Standard 55. CBE’s tool has been actively used, with as many as 6000 users per year, and it offers numerous capabilities, which we have expanded in the most recent version.  Read more

CBE’s “Changing the Rules” Demonstrates an Occupant-Based Paradigm for HVAC Control for Energy Savings and Improved Thermal Comfort

CBE’s research team recently completed an ambitious project with complementary goals of making buildings occupant-responsive in real time, and addressing outdated rules-of-thumb that were leading to poor performance in both energy use and occupant comfort. Among the numerous findings from this work, it demonstrated that “personal comfort” chairs led to comfort satisfaction for 96 percent of the test subjects, a level well above what is observed in most buildings. The project team also developed and tested innovative HVAC control methods offering significant energy saving potential, and that may be easily implemented in commercial buildings using the most common overhead variable-air-volume (VAV) reheat systems. Read more

CBE Panel Session Explores Innovative Methods for Monitoring Indoor Environments

An expected benefit of the Internet of Things (IoT) in buildings will come from an improved ability to monitor indoor environments in ways that lead to actionable insights. A panel session hosted by UC Berkeley’s Center for the Built Environment (CBE) explored three innovative methods to monitor buildings using the latest in sensing and communicating technologies. The ideas range from futuristic to immediately applicable, with a focus on measuring CO2. Understanding CO2 concentrations in buildings is important, as several recent studies suggest that high levels of the gas may have negative effects on our cognitive performance, yet there are challenges to measuring it in a reliable and comprehensive manner.  Read more