As we gear up for our year-end rituals and activities, here at CBE we can take a moment to reflect on our efforts during 2023, and remember our purpose — to contribute towards making a more sustainable and equitable world. We are pleased to report on such wide ranging work, and also note that this would not be possible without the participation of CBE’s Industry Partners. We are grateful for their support and the ongoing contributions of our colleagues, students and affiliates. We wish you all the best for 2024, and in this post share some of our major accomplishments and milestones.
Category: Reports and findings
An international team of researchers led by CBE has devised a new method for evaluating thermal comfort inside buildings over extended periods of time. The new index, one of many created and tested by the team, has been demonstrated to be a significant improvement over existing indices being used in building design and operation.
Imagine an ice cream parlor that offers only one flavor of ice cream, one chosen by scientists based on what an ‘average’ person wants. While this idea seems absurd, a similar logic has been used in establishing standards for thermal comfort in buildings. A group of CBE staff, industry partners and others have developed a revision to thermal comfort standards that acknowledges the variability in human comfort preferences.
Working From Home During the Covid-19 Crisis: Window Views May Help Emotional States, Productivity and Comfort
Millions of people are working at home to prevent the spread of Covid-19, creating stress and impacting our well-being and productivity. Science shows that time spent in nature may improve our health and emotions, however, when we are not able to be in nature physically, we may derive benefits simply by access to windows with views. A study recently published by CBE found that a view from a window has positive impacts on emotion, cognitive performance and thermal comfort.
We launched a new suite of free and publicly available online resources to facilitate academic and professional studies of thermal comfort in buildings. These tools can be used to inform questions about thermal comfort, and to encourage the design of climate-responsive and comfortable low energy (and ZNE) buildings.
The emerging Internet of Things offers opportunities to improve how we design, measure and operate buildings. CBE’s research team conducted a six-month field demonstration of a system using IoT-connected heated and cooled office chairs. Results demonstrated high levels of comfort seen in few buildings. In addition, the data from occupants’ use of the chairs can be used to predict thermal comfort more accurately than methods previously available.
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 a project with goals of making buildings occupant-responsive in real time, and addressing outdated rules-of-thumb that lead to poor energy performance and occupant comfort. Findings demonstrated that “personal comfort” chairs led to comfort satisfaction for nearly all test subjects. The project team also developed and tested innovative HVAC control methods offering significant energy saving potential.
An expected benefit of 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 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.
As part of a four-year study on the design and operation of radiant systems, CBE collaborated with NBI and TRC Energy Services to complete nine case studies of commercial buildings that demonstrate good performance in terms of both energy performance and occupant satisfaction in buildings with radiant systems. The projects represent diverse approaches to radiant system design, including in-slab and ceiling panel solutions.
Two CBE Reports Reveal New Insights into Energy Performance and Design Practices for Radiant Systems in Commercial Buildings
Two reports released from UC Berkeley’s Center for the Built Environment provide valuable insights into the effectiveness of radiant cooling and heating systems, a promising HVAC technology that is becoming increasingly used in commercial buildings in North America, including in a high proportion of ultra-low and zero-net energy buildings. These reports reveal how such systems work in practice, analyzing comprehensive data from a large group of buildings in operation.