natural ventilation

The use of a hybrid cooling system using radiant cooling panels with wind-induced cross ventilation is described in this paper. Its performance is compared to the hybrid system using underfloor air-cooling. The radiant cooling panels system appears more energy efficient and brings more thermal comfort than the under-floor air cooling system.

This study was undertaken in IEA ECBCS Annex 35 to model a hybrid-ventilated room and to implement control strategies. An experimental cell was designed and simulations were performed after having adjusted the thermal models to experiments. The hybrid ventilation proved more performant than traditional ventilation systems.

This paper deals with the steady state simulations carried out with the CFD software Flovent along with dynamic building energy simulations using the ESP-r programme applied to three buildings (located in Ireland, Poland and Denmark) intended to be equipped with supply air windows coupled with passive stack ventilation systems. Supply air windows consist of two layers of glazing separated by a ventilated layer. Air enters the cavity at the bottom from outsides and enters the building at the top. Systems design from simulation results is discussed.

This paper demonstrates that the distribution and area of ventilation openings affects significantly the air flow rates in a hybrid ventilation system.

This paper intends to find a simplified method for the prediction of natural ventilation in a cross ventilated room . This method is based on the use of pressure boundaries instead of the modelling of a larger domain.

This paper presents an on-going research programme about the performance of a natural ventilation system in a 3-storey building (with 2 aparments in every floor) in Portugal.

Full-scale laboratory measurements combined with numerical simulations were undertaken to evaluate CFD capability to predict the pesticide dispersion in a naturally ventilated building. CFD successfully reproduced the trends but overestimates the mixing inside the building.

That study aimed at investigating the contaminate distribution in and around a naturally ventilated livestockbuilding with and without an upstream obstacle.

Natural ventilation’s fluctuating airflow has impacts on the thermal comfort and VOCs transportation in the naturally ventilated buildings. Research about the fluctuating characteristics of the airflow in naturally ventilated buildings was carried on in t

Traditional residential buildings in Anhui, Southern China, maintain comfortable indoor thermal conditions in the summer without any air-conditioning. To understand this phenomenon, the building thermal environment was simulated to study the physical principles for maintaining natural thermal comfort. Measured data such as outside temperatures, solar radiation intensities, the thermal characteristics of the structure, and the interior gain were used as the boundary conditions.