In a building, energy consumption and user’s comfort are directly related to its thermal performance. In early stages of building design, architects do not have enough input data to perform precise calculations. Anyway, due to the importance of the initia
In experimental chambers, the ventilation effectiveness and thermal comfort of a task ventilation system has been investigated. The method and results of the experiment are presented in this paper. The conclusion of that thermal comfort survey is that task ventilation systems maintain the occupants thermally comfortable while saving energy.
In this paper the relation between temperature satisfaction ratings and unsolicited complaint rates recorded in a maintenance database is analyzed. That relationship validates a new method of assessing the economic cost of thermal discomfort in commercial buildings.
It is not easy to provide simultaneously thermal comfort, proper air quality, efficient energy consumption to building occupants. In this paper an alternative methodology of real-time determination of optimal indoor air condition for HVAC system to achieve those 3 requirements is presented. A 24 hours operating HVAC system of a single-story building was chosen as a case study.The experiment results obtained with the proposed methodology were better than those from a conventional approach.
This paper presents an extensive field survey conducted in residential naturally ventilated buildings in Indonesia. The data gathered has been analyzed and revealed that the Predicted Mean Vote equation predicted a warmer thermal perception compared to what people really felt. Under hot and humid tropical climate, people in free-running buildings had a preference for cooler environment and for higher wind speed.
This study describes an experiment on a Task Unit and reports the results. The Task Unit coolsthe upper half of the body by isothermal air flow and warms the lower half of the body by a radiant panel. Tests were designed to compare heat removal by moving air after identifying the metabolic rate and how the thermal sensation and comfort sensation improve during the summer season. As a result, when the room temperature rises, the activity ratio of the Task Unit rises, too.
A PMV (predicted mean vote) index is often adopted to assess the thermal comfort conditions of thermal moderate environments, but to prevent problems when monitoring or controlling HVAC equipment a fuzzy adaptive controller has been introduced. That paper gives a description of the method along with the presentation of simulation results .
This paper is a clear presentation of the different available systems to ensure a good thermal comfort : the author starts with passive systems that maintain comfort without an extra energy consumption, carries on with the low-energy consumption systems that allow air refreshment ,
then refreshing floors and cool ceilings and low-speed ventilation are described , he ends with
air-handling devices to be installed in residential or collective housings.
This paper presents the results of the application of building thermal simulation in the design of anew concert hall and refurbishment of interior spaces in the So Francisco Convent in Coimbra, Portugal. The proposed design uses displacement ventilation in all spaces, mechanically driven in the auditorium and hybrid in the convent rooms. A displacement ventilation model, recently implemented in EnergyPlus, is used to predict energy consumption and thermal comfort.
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