Airbase publication

A double population Lattice Boltzmann is used to solve the problem of the diffrentially heated cavity The use of a non-uniform grid makes it possible to validate the approach for laminar and transitional flows and (10³≤R_a≤10⁸). The results obtained, concerning the heat and mass transfers are in concordance with those of the literature. This comparison makes it possible to validate this type of approach for the prediction of anisothermal flows.

This paper presents results of a study concerning the hygrothermal and durability performance of timber construction wall and bottom slab assemblies built in “passive house technology” for habitable basements of floating houses. Highly-insulated basement systems made of solid timber boards were developed, simulated and monitored and with regard to hygrothermal performance and furthermore, the probable durability investigated. The results of the simulations will be compared with in-situ measurements, which are carried out at an test set-up.

In this paper, the potential of energy saving in residential building in Changsha area was studied with dynamic simulation approaches. As we know that cooling and heating are both required more or less in this climate zone considering the climate condition and solar radiation may be advantaged for winter but disadvantaged for summer. This simulation was made to analyze the effect on the air conditioning energy consumption from four aspects: the material of the exterior wall thermal insulation, the window glass type, exterior window shades, and the indoor lighting control.

The aim of this research work is to investigate the actual energy consumption in existing public buildings and to obtain the basic data for energy conservation of these buildings. Various monthly energy consumption data of public buildings in Osaka for the period from April 2000 to March 2002 was gathered and analyzed to determine the nature of the energy consumption of buildings. One of the investigated buildings is selected as the typical building and the heat load is calculated. The calculated values of the energy consumption are compared with the investigation values.

Velocity fields on the platform area and flow rate of the smoke extraction system were experimentally measured under the different fan-operation modes in an actual subway station in Beijing. The velocity at the four tunnels connected with the station and velocity at the stairs between platform and concourses were obtained. Through simulation based on the measured results, the smoke velocity, temperature and concentration in case of station fire under the different fan-operation modes were analysed, and the optimal smoke extraction mode was proposed.

Various simulation programs and visual tools of HVAC system ever released, which were not  originally developed to be used as commissioning tools, are considered to be potentially powerful tools for commissioning, as use of these programs facilitates the confirmation/comparison of function and performance of HVAC systems and detailed analysis of parameters influencing HVAC system performance. In the present paper, application and convenience of several programs such as Micro HASP, Micro ACSS, FACES, LCEM, TRNSYS, DOE-2, EnergyPlus and DeST and their visual tools as tools to support commissi

VAV system is a very complicated one in airconditionging systems, thus automatic control become the key of such a system. As necessary components in automatic control system, sensor has failure risk. It is so expensive that detect sensor fault by hardware redundancy in comfortable air-conditioning system. This paper presents an approach, Principal Component Analysis (PCA), to detect and identify sensor fault in VAV system.

It is obvious that a building permanently exchanges with its nearby environment (mainly light, heat, sound, visual accessibility); these interactions are numerous and complex enough to require serious means of investigation, more especially as the requests of the new regulations and those of the users become increasingly demanding.

This paper demonstrates a simple and practical simulation-based approach for fast identification of appropriate building design strategies at the early stage of a design project. A simplified passive solar house was modeled using an integrated building energy and CFD simulation to examine the feasibility of different sustainable thermal strategies for use in the 2007 Solar Decathlon Competition. The home was modeled in EnergyPlus, and then the surface temperatures at times of interest were used as boundary conditions for CFD modeling in PHOENICS.

This paper presents the features of Eco-Bat, a computer program developed to assess the environmental impacts of buildings, including construction materials and energy consumed, during its life cycle. The methodology used to evaluate environmental impacts based on a life cycle assessment (LCA) approach, compatible with ISO 14040 standards, is detailed. The data are mainly extracted from Ecoinvent (Anon A). Two applications are presented to illustrate the possibilities offered by Eco-Bat.