This study describes and compares the results of two field surveys about thermal comfort inside air conditioned buildings in two different classrooms. Both field studies were conducted in classrooms at The University of South Florida, Tampa, USA during the summer of 2014 and the fall of 2015. The purpose of this study is to investigate the temperature perception of humans in closed areas based ...

This article presents a pilot study of thermal comfort and adaptive behaviors of occupants who live in naturally ventilated dormitories at the campus of the National University of Singapore. A longitudinal survey and field measurement were conducted to measure thermal comfort, adaptive behaviors and indoor environment qualities. This study revealed that occupants living in naturally ventilated ...

background: today discussion thermal comfort due to technology advances and equipment application in the workplace for government and non-governmental organizations managers in the industrial and non-industrial environments, especially hospitals staff   due to the diversity of people employed and the type of work they are doing of particular importance. this study was conducted to evaluate the ...

The concept of Design-Build-Operate Energy Information Modeling (DBO-EIM) is proposed. The DBO-EIM aims at creating a detailed and persistent energy model that can be used to reduce energy consumption and improveoccupant comfort throughout the life-cycle of a building. Within the framework, the model is builtto supportdecision makingin the design phase, validated and tuned during construction a...

Heating, ventilation, and air conditioning (HVAC) systems are the second largest energy consumers on cruise ships after propulsion system. As a kind of HVAC system, active chilled beam (ACB) have been widely used for cabin service due to their performance efficiency good thermal comfort. However, conventional control strategies ships’ ACB not intelligent enough cannot balance consumption comfor...

About the Author John E. Janssen chaired Standards Project Committee (SPC) 62, which developed ANSI/ASHRAE Standard 62–1989, Ventilation for Acceptable Indoor Air Qualtiy and also served on the SPC that wrote Standard 62–1981. Until his retirement, he was a principal research fellow at Honeywell. Janssen has authored several Journal articles, including “The V in ASHRAE, An Historical Perspectiv...

The faulty operation of Heating Ventilation and Air Conditioning (HVAC) systems in commercial buildings can waste vast amounts of energy, cause unnecessary CO2 emissions and decrease occupant thermal comfort, reducing productivity. We propose a new method of automating Fault Detection and Diagnosis (FDD), based on the modelling of operational faults in HVAC subsystems, using techniques from sta...

About the Author Max Sherman, Ph.D., is a senior scientist and group leader of the Energy Performance of Buildings Group at Lawrence Berkeley National Laboratory in Berkeley, Calif. He is former chair of Standards Project Committee 62.2P, Ventilation and Acceptable Indoor Air Quality for Low-Rise Residential Buildings. s HVAC&R professionals, our major concern is the engineering of indoor envir...

The chiller plays an important role for providing comfort environment. Once, the incipient faults are missed, they may develop to be fatal and further lead equipment damage casualties. Nevertheless, fault in running process of easily neglected noise. Moreover, variables have dynamic characteristics, each variable is correlated with other process, a certain interrelated at different times. To ta...