LoginA study was performed on the effects of porosity on discharge coefficient and airflow characteristics under the condition where uniform approaching flow directly faces to and enters the opening by using wind tunnel experiment and CFD analysis.
Volume 5: 2006-2007
International Journal of Ventilation, Volume 5, 2006-2007
Volume content
A Study on the Effects of Porosity on Discharge Coefficient in Cross-Ventilated Buildings Based on Wind Tunnel Experiments | 2006 | English
A Wind Tunnel Experimental Analysis of the Ventilation Characteristics of a Room with Single-Sided Opening in Uniform Flow | 2006 | English
Wind-induced cross ventilation is one of the key technologies for saving energy while controlling the indoor environment, and seems to be a crucial element of any sustainable building policy.
Case studies provide essential evidence about the performance of buildings. They also illustrate the methods by which a technology can be implemented as well as highlighting problems.
Traditional naturally ventilated houses are not designed for active thermal control.
Air Quality and Thermal Comfort in an Office with Underfloor, Mixing and Displacement Ventilation | 2006 | English
An underfloor ventilation system providing three different airflow patterns, a mixing ventilation system, and a displacement ventilation system utilizing a wall-based diffuser were tested in a mock-up of a typical office.
Air Quality Inside a School Building : Air Exchange Monitoring, Evolution of Carbon Dioxide and Assessment of Ventilation Strategies | 2006 | English
This paper presents an assessment of indoor air quality and various ventilation strategies inside a school building located in the south of Portugal. In the first phase, ventilation rate was experimentally evaluated using the tracer gas method.
Applying the Local Dynamic Similarity Model and CFD for the Study of Cross-Ventilation | 2006 | English
The Local Dynamic Similarity Model (LDSM) is a ventilation model for predicting the discharge coefficient and the inflow angle at the opening of a cross-ventilated building.
The possible benefits of automatic ventilation control of trickle ventilators in dwellings are investigated.
CFD Modelling of Cabin Air Ventilation in the International Space Station: A Comparison of RANS and LES Data with Test Measurements for the Columbus Module | 2006 | English
Ventilation characteristics of the Columbus module are numerically predicted on the basis of the Reynolds-Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) approaches.
Five fire scenarios have been simulated with the CFD model Fire Dynamics Simulator (FDS) to analyse the performance-based fire safety design of a 2935 m-long railway tunnel.
This paper presents an experimental and numerical analysis of building cooling using night-time coldaccumulation in phase change material (PCM), otherwise known as the free-cooling or passive-cooling principle.
Comparative Energy Analysis of a Constant Air Volume (CAV) System and a Variable Air Volume (VAV) System for a Software Laboratory | 2006 | English
The objective of heating, ventilating and air conditioning (HVAC) systems is to satisfy users when it comes to health, indoor air quality (IAQ), and thermal comfort.
The authors outline the knowledge they have gained through their design experience on the efficacy of natural ventilation in non-residential buildings in Japan.
Development of a Simulator for Indoor Airflow Distribution in a Cross-Ventilated Building using the Local Dynamic Similarity Model | 2006 | English
In this study, the evaluation of cross ventilation is presented based on the simultaneous analysis of inside and outside conditions and for wind directions other than 0 degrees (i.e.
Effects of Nozzle Geometry on Air Flow Jet and Temperature Distribution in an Enclosed Space | 2007 | English
The aim of the work was to investigate the effect of upstream geometry of the nozzle on the turbulence mixing and temperature distribution in still air large enclosed spaces.
Evaluation of Discharge Coefficients for Window Openings in Wind Driven Natural Ventilation | 2006 | English
This paper describes the classical approach for calculation of wind driven airflow through large openings in buildings and discusses the fulfilment of the limiting assumptions.
This paper reports on tracer gas measurements of the ventilation flow within a low-energy building.Constant-concentration, decay and homogenous tracer gas emission methods were used.
Experimental Evaluation of Combined DCV and Economizer Cycle using a FLC Variable Air Volume (VAV) System | 2007 | English
A healthy indoor environment with sufficient fresh air is a prerequisite for the well-being and highproductivity of building occupants.
Experimental Study on Predicting Wind-Driven Cross-Ventilation Flow Rates and Discharge Coefficients Based on the Local Dynamic Similarity Model | 2006 | English
It is known that discharge coefficients vary with wind direction and opening position. The local dynamic similarity model of cross-ventilation can select discharge coefficients on this basis.
Flow Visualization and Inflow Direction Measurement at a Cross-Ventilated Large Opening | 2006 | English
In the case of cross ventilation through a large opening, it is well known that the inflow direction at the opening is not normal to the opening.