Explanipedia

A study of the inhibitory effect and mechanism of airflow regarding mould on building surfaces Open

Hongling Zhang, Hui Zhang, Edward Arens, Ling Jin, Yingdong He , et al. · 2024

Air movement dries surfaces by increasing evaporation and convection, which may prevent mould growth. Cladosporium sp. is used as the test organism (dominant fungi in the envelope of rural houses in hot summer and warm winter areas), and t…

Causal thinking: Uncovering hidden assumptions and interpretations of statistical analysis in building science Open

R. Sun, Stefano Schiavon, Gail Brager, Edward Arens, Hui Zhang , et al. · 2024

Causal thinking emphasizes the understanding of asymmetric causal relationships between variables, requiring us to specify which variable is the cause (independent variable) and which is the effect (dependent variable). Reversing the causa…

Hot, cold, or just right? An infrared biometric sensor to improve occupant comfort and reduce overcooling in buildings via closed-loop control Open

Ronnen Levinson, Donghun Kim, Howdy Goudey, Sharon Chen, Hui Zhang , et al. · 2024

International Energy Agency - Resilient Cooling of Buildings - Key Performance Indicators Report (Annex 80) Open

Peter Holzer, Abhishek Gaur, Edward Arens, Shady Attia, Vincenzo Corrado , et al. · 2024

The world is facing a rapid increase of air conditioning of buildings. It is the motivation of Annex 80 to develop, assess and communicate solutions of resilient cooling and overheating protection. Resilient Cooling is used to denote low e…

Two-point and multiple-point spot heating and cooling Open

Edward Arens, Hui Zhang, Davide Filingeri · 2023

Apparatus and methods for producing thermal comfort using two point or multipoint heating or cooling that is applied to portion of a human body part to produce a warm or cool sensation over a larger area than that where the heating or cool…

The Chinese thermal comfort dataset Open

Liu Yang, Shengkai Zhao, Yongchao Zhai, Siru Gao, Feixiang Wang , et al. · 2023

Numerical simulation of cooling performance of radiant ceiling system interacting with a ceiling fan Open

Xingguo Guo, Shuangshuang Wan, Wenhua Chen, Hui Zhang, Edward Arens , et al. · 2023

We evaluate the heat transfer from radiant ceilings that have suspended acoustical panels present for noise reduction. An upward-directed ceiling fan is added to offset the reduction of heat exchange due to the acoustical panels. We system…

Smart detection of indoor occupant thermal state via infrared thermography, computer vision, and machine learning Open

Yingdong He, Hui Zhang, Edward Arens, Alexander Merritt, Charlie Huizenga , et al. · 2022

International Energy Agency EBC Annex 80 - Resilient Cooling of Buildings - State of the Art Review Open

Ai Zhengtao, Jan Akander, Edward Arens, Taha Arghand, Shady Attia , et al. · 2022

The world is facing a rapid increase of air conditioning of buildings. It is the motivation of Annex 80 to develop, assess and communicate solutions of resilient cooling and overheating protection. Resilient Cooling is used to denote low e…

Ceiling-fan-integrated air-conditioning: thermal comfort evaluations Open

Maohui Luo, Hui Zhang, Zi Wang, Edward Arens, Wenhua Chen , et al. · 2021

Ceiling-fan-integrated air-conditioning (CFIAC) is a concept in which terminal supply ducts and diffusers are replaced by vents/nozzles that jet supply air into the vicinity of ceiling fans to be mixed and distributed within the room. CFIA…

Creating alliesthesia in cool environments using personal comfort systems Open

Yingdong He, Thomas Parkinson, Edward Arens, Hui Zhang, Nianping Li , et al. · 2021

Personal Comfort Systems (PCS) promise to reduce the energy needed to condition indoor environments, while also enhancing their occupants' thermal pleasure. To explore these potentials in heating conditions, we compared the effectiveness o…

Application of Gagge’s energy balance model to determine humidity-dependent temperature thresholds for healthy adults using electric fans during heatwaves Open

Federico Tartarini, Stefano Schiavon, Ollie Jay, Edward Arens, Charlie Huizenga · 2021

Heatwaves are one of the most dangerous natural hazards causing more than 166,000 deaths from 1998–2017. Their frequency is increasing, and they are becoming more intense. Electric fans are an efficient, and sustainable solution to cool pe…

Resilient cooling strategies – A critical review and qualitative assessment Open

Chen Zhang, Ongun Berk Kazanci, Ronnen Levinson, Per Heiselberg, Bjarne W. Olesen , et al. · 2021

Prototyping Solutions to Improve Comfort and Enable HVAC Energy Savings Open

David Lehrer, Edward Arens, Hui Zhang, David Fannon · 2020

Digital and physical prototypes are commonly used across a broad range of industries for product development and user experience testing. Prototyping processes are also used in scientific research to generate ideas and test hypotheses. How…

Annual Radiation Discomfort: A New Climate-Based Framework For Modeling Short-Wave Solar Radiation In Indoor Spaces Open

A. Zani, Henry David Richardson, Alberto Tono, Stefano Schiavon, Edward Arens · 2020

Controlling the incoming solar radiation is one of the main responsibilities of sustainable building designers, in order to minimize glare and cooling loads and maximize thermal comfort and usable daylight. However most solar shading desig…

Integrating Smart Ceiling Fans and Communicating Thermostats to Provide Energy-Efficient Comfort Open

Paul Raftery, Dana Miller, Hui Zhang, Therese Peffer, Gail Brager , et al. · 2020

The project goal was to identify and test the integration of smart ceiling fans and communicating thermostats. These highly efficient ceiling fans use as much power as an LED light bulb and have onboard temperature and occupancy sensors fo…

Advances to ASHRAE Standard 55 to encourage more effective building practice Open

Edward Arens, David Heinzerling, Shichao Liu, Gwelen Paliaga, Abhijeet Pande , et al. · 2020

ASHRAE Standard 55 has been evolving in recent years to encourage more sustainable building designs and operational practices. A series of changes address issues for which past design practice has been deficient or overly constrained. Some…

High-density thermal sensitivity maps of the human body Open

Maohui Luo, Zhe Wang, Hui Zhang, Edward Arens, Davide Filingeri , et al. · 2019

A simulation-based design analysis for the assessment of indoor comfort under the effect of solar radiation Open

A. Zani, Henry D Richardson, Alberto Tono, Stefano Schiavon, Edward Arens · 2019

One of the drivers of sustainable design is to maximize daylight across the floor plan in order to decrease electric energy consumption and create more productive and healthy working spaces. However, uncontrolled incoming solar radiation c…

Eliminating Overcooling Discomfort While Saving Energy Open

Gwelen Paliaga, Hui Zhang, Tyler Hoyt, Edward Arens · 2019

A large percentage of commercial buildings in North America use variable air volume (VAV) systems with reheat, and this system type is also common around the world. Summertime overcooling is widespread in such buildings and has received co…

Personal CO2 bubble: Context-dependent variations and wearable sensors usability Open

Ali Ghahramani, Jovan Pantelic, Matthew Vannucci, Lorenza Pistore, Shichao Liu , et al. · 2018

Occupant comfort and behavior: High-resolution data from a 6-month field study of personal comfort systems with 37 real office workers Open

Joyce Kim, Fred Bauman, Paul Raftery, Edward Arens, Hui Zhang , et al. · 2018

A new modeling approach for the assessment of the effect of solar radiation on indoor thermal comfort Open

A. Zani, Andrea Giovanni Mainini, Juan Diego Blanco Cadena, Stefano Schiavon, Edward Arens · 2018

Thermal-comfort modeling has traditionally incorporated radiant effects via the metrics mean radiant temperature (MRT) and radiant temperature asymmetry. These metrics have not until recently, considered the effect of incoming solar radiat…

Learning occupants’ workplace interactions from wearable and stationary ambient sensing systems Open

Ali Ghahramani, Jovan Pantelic, Casey Lindberg, Matthias R. Mehl, Karthik Srinivasan , et al. · 2018

The Effect of a Low-Energy Wearable Thermal Device on Human Comfort Open

Zhe Wang, Maohui Luo, Hui Zhang, Yingdong He, Ling Jin , et al. · 2018

This paper explores the ability of a low-energy wearable thermal device to improve whole body thermal comfort. The wearable device is a wristwatch-like thermal device with a 25mm * 25mm contact heating and cooling surface. Twenty-three sub…

Reducing building over-cooling by adjusting HVAC supply airflow setpoints and providing personal comfort systems Open

Hui Zhang, Fred Bauman, Edward Arens, Yongchao Zhai, Darryl Dickerhoff , et al. · 2018

Over-cooling happens commonly in air-conditioned buildings that costs energy and results in discomfort complaints. There are many reasons causing overcooling, and HVAC engineers and researchers have proposed several approaches to prevent i…

Heating and cooling the human body with energy-efficient personal com-fort systems (PCS) Open

Maohui Luo, Hui Zhang, Edward Arens, Ali Ghahramani, Zhe Wang , et al. · 2018

Personal comfort systems (PCS) aim to efficiently fulfill building occupants’ personal thermal comfort demands, but to date not many have been manufactured and evaluated. Based on the observation that foot/hand warming are most effective i…

Thermal comfort evaluated for combinations of energy-efficient personal heating and cooling devices Open

Maohui Luo, Edward Arens, Hui Zhang, Ali Ghahramani, Zhe Wang · 2018

Sunlight and Indoor Thermal Comfort Open

Edward Arens, David Heinzerling, Gwelen Paliaga · 2018

ASHRAE Standard 55 has adopted new provisions to assure thermal comfort for occupants exposed to solar radiation indoors. They are included in the recently-released 2017 version of the Standard [1]. Normative Appendix C provides …

Heating and cooling the human body with wirelessly-powered devices Open

P.J. Goodrich, Gabe Fierro, Vy Luu, Haifeng Zhang, Edward Arens · 2018

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