This paper introduces a manual of thermal comfort in heated rooms. The manual is a design tool to help choose structural measures and make decisions regarding building energy systems for residential and office buildings and comparable room categories. Details are given concerning the calculation algorithm and the related boundary conditions. The major part of the manual contains diagrams illustrating thermal comfort for the most various structures and installation. Some selected diagrams and figures are presented in the paper.

The development of a new device for the injection of tracer gas is discussed with the objective of practical application in the field of HVAC airflow measurements. The uniform tracer gas dispersion for very short distances, when measuring airflow by the constant emission method is of great interest. This new injection device has a compact tubular shape, with magnetic fixation to be easy to apply to duct walls. After a preliminary study with an initial prototype already tested, further detailed experiments had been carried out, culminating in a second prototype.

For the zoning room air conditioning strategy to work properly, it is essential that the supply air is delivered in such a way that it does not block the plumes' way from the lower zone to the upper. The parameter measuring the fulfilment of this condition is the plume penetration. This kind of parameter could be measured by releasing tracer gas into the heat source and measuring the response elsewhere. This was done in our research also, but the tracer gas experiment was supplemented by an alternative method, utilizing small helium-filled soap bubbles instead of gas.

We present a method capable of measuring the velocity field in a 7.00m x 3.50m plane of a large-scale Rayleigh-Bénard (RB) experiment using an adapted Particle Image Velocimetry (PIV) technique. The structure of the flow in RB convection is well known for

To satisfy the optimal environment in agricultural buildings, much effort is made to controlventilation rate and indoor temperature. However, distribution of fresh air is equally important for animal performance and welfare. So far, no sensor is available to measure and to control airflow pattern continuously in a ventilated building. Therefore, an airflow pattern sensor was developed to measure the trajectory of a nonisothermal air jet in a building with a single or multiple air inlet(s).

Wind pressure measurements corresponding to the various configurations of a detached houseshould be conducted by wind tunnel tests using a comparatively large geometric scale model because a building of extremely small size is targeted.

Experiments have been carried out to measure unsteady velocity fields near the coughing subject (mannequin) and also understand unsteady transport process resulting from this type of transient flow. Representative human cough waveforms were reproduced using a flow simulator and the measurements were made using Time Resolved Particle Image Velocimetry (TRPIV). Initial high velocity as well as rapid velocity decay with time and distance were observed, and velocity time history and vorticity variations were characterized.

For a specific thermal anemometer with omnidirectional velocity sensor the expanded total uncertainty in measured mean velocity Û(Vmean) and the expanded total uncertainty in measured turbulence intensity Û(Tu) due to different error sources are estimated

Different measurement procedures are available for the experimental assessment of air change rates inside ventilated enclosures. These mainly consist of tracer gas techniques and can usually be applied to steady-state or moderately transient conditions and when a continuous mixing of the indoor air is assured throughout the test. However, due to the relatively slow response of the gas analysers, none of these procedures can usually be applied to fast transient phenomena that last 15 minutes or less.

In this study Particle Streak Velocimetry, PSV, was used to record instantaneous two-dimensional velocities with the help of digital images of streaks created by small water-density particles suspended in the water. This whole-field measuring technique has been improved by substituting the standard chopper technique by a computer-controlled shutter to get a better result in the evaluation process and criteria control for streaks. The vector flow map (direction, speed and position) was also calculated with the help of digital image processing.