The infiltration term in the building energy balance equation is one of the least understood and most difficult to model. For many residential buildings, which have an energy performance dominated by the envelope, it can be one of the most important terms. There are numerous airflow models;
however, these are not combined with whole building energy simulation programs that are in common use in North America. This paper describes a simple multizone nodal airflow model
In summer, most areas in Japan are hot and humid. Hokkaido Island, which is the most northern part of Japan, is the only exception. However, air conditioning systems have become the norm in all big buildings in Japan, even in Hokkaido, due to increased internal generation of heat from lights and equipment such as computers and printers. However, the outside air temperature often drops below 26C during summer everywhere in Japan even when cooling and air conditioning is turned on.
This guide of 60 pages is written in French. It provides practical guidance to joiners for the installation of natural ventilation systems in dwellings. Firstly it explains in a few words the reasons for ventilating. Then it gives information about the requirements of the Belgian standard NBN D 50-001 "Ventilation systems for housings". The third part of the document deals with the material and its installation. This guide is intended to support the vocational training of young people. It is therefore written in a simple style and well illustrated.
This paper is based on the results of Subtask B of the HybVent Project. It presents a critical review of the literature and recent developments in analysis methods for natural and hybrid ventilation in buildings. Ideally, analytical methods aimed at modelling hybrid ventilation systems should incorporate at least three key aspects i.e: the natural ventilation mode, the mechanical ventilation mode and the control strategy. Depending on the input parameters used within the control strategy, thermal comfort and indoor air quality related parameters may also need to be predicted.
This study concerns single-sided natural ventilation by using a CFD model, along with analytical and empirical models. The effects of opposing buoyancy and wind forces on ventilation rates and indoor conditions were alos studied in that investigation.
A field survey was carried out to evaluate the thermal comfort perception of the occupants of a naturally ventilated public housing in Singapore to find out if that environment meets the Ashrae standard 55's 80 % criteria of acceptability.That survey also examined the adaptive behavior of the occupants in the use of windows, fans, and air-conditioning . Whether the thermal perception was influenced by different sessions of the day, building height and flat types was also part of the study.
The aim of that study was to develop a fuzzy controller for naturally ventilated buildings. This paper describes the process of designing a supervisory control to provide thermal comfort and adequate air distribution inside a single-sided naturally ventilated test room.
A large opening has to be designed at the bottom of a Void (light-well in high-rise apartment building) in order to keep the indoor air quality (IAQ) acceptable, because of the exhaust gas discharge of the gas water-heater. This paper presents a simple calculation method of the ventilation rate induced by wind force and thermal buoyancy through openings at the bottom, along with heat sources such as water-heaters.
Natural convection in a heated vertical duct is studied in this paper.First experimental study and computer simulations were performed in a scaled down laboratory model. Then temperature fields and average temperatures were obtained at all levels of the multi-storey building.
Badly designed stables may affect the animals' health, but it is difficult to design a stable with acceptable ventilation rates and indoor comfort without the right tools or guidelines.For the design of animal housing facilities, the authors used the passive building simulation tool QUICK II, extended with a natural ventilation model, and an animal heat generation model.
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