Natural ventilation and infiltration are used for pollutant dilution and providing ‘fresh’ outdoor air supply in many buildings, in particular in residential buildings. Questions are often asked when natural ventilation should be encouraged. A balance-poi

The main aim of a heating system is to provide the objective thermal comfort parameters. The subjective thermal sensation of users is a very important aspect.The paper presents the results of experimental measurements on thermal comfort of indoorenvironment. The investigation was carried out in two blocks of flats. They were alike, but forthe installed thermal valves.

The objective of that study was to find out the important properties of ground covers, the optimal air change rates for the controlling of moisture conditions in an outdoor air-ventilated crawl space in a cold climate, and to estimate the acceptability of current moisture conditions in respect of material durability. In addition, factors affecting the transport indoors of possible pollutants from crawl spaces were studied.
The moisture conditions were calculated with a dynamic simulation model, which was validated against measured data.

A partition integrated air supply system can provide highly personalized environmentalcontrol. The supply air is brought up through raised floors and supplied to outlets located onthe partition panels. The purpose of this paper is to find the best design of outlets for optimaloccupant comfort within a personal task area.Real-scale experiments were conducted to allow for comparisons of outlet designs within apersonal task area.

This paper presents a transient periodic heat transfer analysis of non-air-conditioned multizonebuildings taking into account the effects of heat fluxes through various facades ofbuildings including windows, air ventilation and infiltration, furnishings and ground heatconduction. A user-friendly computer software has been developed for the above mentionedpurpose. The validity of the analysis and the building simulation software has been checkedby comparing the results with those obtained by running commercial software SUNCODE forthe same input data.

The air-conditioned office building design in the tropical hot-and-humid climates has seldomtaken into account adaptation principle to thermal comfort. This induces the occupants to findcomfort at the pre-determined comfort criterion in air-conditioned enclosure and they soondevelop a higher expectation of homogeneity that in turn leads to demand of coolertemperatures. Though the research knowledge is large, practical implementation has aptlyignored the variability of individuals comfort criteria.

We describe the implementation of a model reduction tool within a software dedicated tothermal and airflow simulation. The goal is to allow the use of more detailed models. Wecompare experimental results and simulations results. We show the usefulness of the balancedreduction model for thermal and airflow simulation.

This paper presents the performance of a displacement ventilation system in a thermalchamber with tropical subjects. The chamber is served by an Air-Conditioning andMechanical Ventilation (ACMV) system in either Mixing or Displacement Ventilation modes.In the experiments, tropical subjects were surveyed with respect to their thermal sensationsunder different room conditions in either displacement ventilation or mixing ventilation.Objective measurements such as room air temperature, air velocity and relative humidity weremeasured at different heights in the chamber.

A spot cooling system using the convective cooling effect of an air stream is known to beeffective by its smothering intensive hot environment, supplying comfort sense and utilizingenergy efficiently. However, its study on the interaction with human body or product itself isuncommon, showing that the spot cooling system intrinsically contains the possibility ofdraught because of its short emitting distance from the object, low air temperature, high airstream velocity and its direct local contact to human body.

A series of thermal comfort field data (about 1800 observations), collected in Bari (Southern Italy), were implemented according to the ASHRAE RP-884 world database format, thus constituting a local database for the Mediterranean area, which, with exception of Greece, is not represented in this world database. The collected data, mostly already published, were reexamined in the light of the latest international literature on the subject.