IBPSA2007

The new European regulations on energy saving were aimed at a reduction in consumption in the winter phase. This caused even warm countries such as Italy to use envelopes optimised for the winter phase only which are nevertheless unsuitable to the other seasons. The research was developed in order to understand the total yearly behaviour of different envelopes in Mediterranean climates. It started from a real case subject to: (i) monitoring; (ii) simulation of the as-built state for tuning up the software (ENERGYPLUS); (iii) parametric analysis.

Residential Building Energy Efficiency (RBEE) becomes more important in recent years in China. From 1986, Chinese government has carried out a series of codes of RBEE, but for kinds of reasons, the effect is not perfect enough. One important reason is In order to promote the development of RBEE, an energy labeling system was presented in this paper. In this labeling system, the real estate company was requested to label the energy consumption data of the houses to be sold on the sales documents, and show this data to the consumers.

This paper presents a new methodology for largescale commercial buildings energy consumption data analysis. This methodology relies on a unified energy consumption classification structure and on a set of index models and estimating models. All these elements have been combined into a data model that is presented in this article. This new methodology has been applied successfully to 4 office buildings, two of them being Chinese and two of them being French.

With the occurrence of indoor terrorism attacks and the accidental release of toxic chemicals, people have paid more attentions on such emergency events in recent years. The effective evaluation method of emergency ventilation strategies could help people find out the accurate way to control the ventilation system, and reduce the total loss during the event. In this article, two methods to evaluate the effect of ventilation are compared. One is based on Efficiency Factor of Contaminant Source (EFCS). The other is based on Exposure Risk (ER) and Population Risk (PR).

Subway is consisted of tunnels, platforms and ventilation shafts. The air flow between these structures forms a ventilation network. There is a need for fire modeling tools capable of both rapid and precise simulation for fire and smoke propagation in such ventilation network. Computational Fluid Dynamics (CFD) is widely used in subway fire performance design. However, the boundary conditions used in models are always assumed to be constant.

Life cycle green cost assessment (LCGCA) method, which can evaluate building environmental load and economic performance throughout its life cycle comprehensively, is propounded in this paper in order to guide green building design. In LCGCA, environmental load (EL) cost is proposed based on concept of environmental tax and counted into general building initial cost and operating cost, and then green payback time (GPT) could be worked out. With this method, an office building in Beijing is studied.

In this paper, a 3-floors building with capacious spaces was introduced. It has unique shape and all-glass envelope, which worsens the thermotechnical performance of the envelope, deteriorates the indoor thermal comfort. By simulation, the indoor thermal environment of this building can be obtained.

Green building has come to be a goal of building design now. Since sustainable performance of building involves lots of aspects, an integrated index is needed to evaluate it comprehensively. Building environmental impact assessment (EIA) based on life  cycle assessment (LCA) theory is a well-known method to do this.

Variable Air Volume (VAV) system has been widely used in order to reduce energy consumption. However, operation performance and energy consumption may not be as good as expectation in practical projects due to some failures. Hunting of control parameters is one of the typical failures, which may result in dissatisfying the owner’s requirements, abrading the actuators and reducing the service life of the equipment. In this paper, hunting problem is divided into three categories and several solutions are suggested.

Energy conservation at building’s operation stage is very important for the national economy. Building up reasonable methods to assess building operational energy consumption is critical and necessary. Japanese researchers use CEC (Coefficient of Energy Consumption), which is the ratio of actual energy consumption to ideal energy consumption, to assess building system’s operation level.