Proposes an HVAC system which combines chilled ceiling with desiccant cooling, to be used in hot and humid climates where air dehumidification is necessary in order to maintain the indoor air humidity within a comfort zone and to lessen the risk of condensation on chilled panels. The system decouples temperature and humidity control by using desiccant wheel for moisture removal and ceiling panels to control the temperature. Another three systems were viewed to evaluate the system performance and energy savings potential.
Aims to supply a simple and useful tool for the analysis of energy performance of different ventilated facades typology. A steady state energy balance was applied to a control volume solving basic equations with finite element code with an iterative procedure, in order to simulate the studied sample. The different surfac3e and air mass temperatures are calculate for each step of the channel height, and the mass flow rate evaluated as overall natural draught.
Investigates the functional connection between the ventilation rate experienced within a building and both the separation of the inlet and outlet vents and the temperature difference between the internal and external air. Identifies two regimes of operations: one where separation drives the situation and one where temperature is the main influence. States that considering these two regimes can have an impact on design philosophy.
Energy renovation of existing buildings can be of varying value as regards improving thermal conditions and energy savings, and economic restrictions. A series of studies have been done since 1994 in Northern Greece, with its cold and prolonged heating season, aimed at approaching the problem and developing viable proposals. Public and mixed-use buildings act as so-called 'pilot-demonstrator' buildings in the study.
States that most whole building thermal modelling computer programs use simplified, one-dimensional, parallel path descriptions of the building envelope, which may generate serious errors in building load estimation for several structural and material configurations of building envelope components which have high thermal mass and/or two- and three dimensional thermal bridges.
Gives a report on thermal comfort and IAQ studies of an under-floor air-conditioning (UFAC) system in a hot and humid climate. In order to predict the airflow pattern of the supply air jet and to determine the occurrence of thermal stratification in the office room, thermal comfort parameters were measured at predetermined grid points within an imaginary plane. The authors also used Fanger's thermal comfort index to detect the occupants' thermal sensation, and measurements were made of the concentration levels of dust and carbon dioxide.
Outlines a study carried out in order to assess the impact of lighting energy savings on global energy consumption for office buildings. It is the result of combining both daylighting and thermal aspects in an integrated approach, and the present article concentrates on the simulation results. A modelling exercise was carried out for several facade configurations, for the four main orientations and three combinations of internal wall reflection coefficients. To perform the simulations, a daylighting simulation tool (ADELINE) was coupled with a dynamic thermal simulation software (TRNSYS).
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