IBPSA2003

The balance between the energy efficient thermal comfort and Indoor Air Quality (IAQ) in healthcare facilities is the main aim of this paper. The present paper will present this balance from the viewpoint of the air conditioning design. It was found that the design of the HVAC airside systems pl ays an important role for the energy consumption optimization and achieving the optimum IAQ. This paper highlights the importance of the proper airside design on the energy consumption, thermal comfort and IAQ.

A  new parameter   e (0≤e≤1),  called  coefficient  of performance, is introduced, whose value quantifies the suitability of the distribution of resistive and capacitive layers in a multi-layer wall, within problems concerning thermal building-plant interaction in case of external sinusoidal or impulsive thermal variations. After giving an integral expression for the calculation of e, the coefficient’s of performance properties are discussed; simple relations allowing to evaluate the value of e in case of walls made of two materials only, i.e.

This   study   investigates   the   energy   exchanges occurring in the volume and on the surface of water ponds and their influence on energy consumption of building. The mathematical model of water ponds is based on coupling the thermal model of the water pond and the airflow model of the surrounding air. It accounts for the heat transfer by radiation, conduction, convection and the latent heat transfer due to water evaporation. The governing equations are numerically solved by a finite difference method for the thermal model and by a finite volume method for the air flow model.

New Dutch office buildings are built under strict energy efficient legislation and well equipped with insulation, condensing boilers, heat recovery systems, etc. Despite this, many buildings don’t perform as energy efficiently as expected. Also comfort problems occur in large numbers. The problem seems to be the frequently used conventional control strategies, most of which were developed at a time when buildings had no insulation and were equipped only with single glazing.

This paper presents a computational environment for performance-based integrated building enclosure de- sign and control support. The key concepts and fea- tures of this environment include: virtual enclosure, construction mapping, and shading device recom- mendation. Optimization methods are adapted and dynamically applied to derive the basic properties of a "virtual" enclosure for a given set of indoor climate requirements. These values are then mapped to a con- struction database to identify an actual building en- closure construction.

Building energy simulation is playing an increasingly important role in building energy codes. This paper investigates the important underlying issues affecting the use of building energy simulation for enhancing building energy codes. The background and development of building energy codes is described. The rationale and important issues of performance- based building energy codes are explained. The practical building design and essential simulation skills are presented. Finally, the key factors affecting the  effectiveness  and  validity  of  the  simulation approach are discussed.

External  shading  devices  have  been  utilized  very extensively in residential buildings in the tropics to reduce the amount of solar radiation entering into the buildings. However, this will affect the availability of daylight   for   interior   lighting   as   well   as   natural ventilation  for  passive cooling and thermal comfort. This  paper  discusses  the  impacts  of  six  different types  of  external  shading  device  on  a  residential building in Singapore.

There is a need for Dutch design support tools for building services that can be used in early design stages. TNO Building and Construction Research has therefore initiated the research project described here. The project will result in guidelines for design support tools for early design of building services in the Netherlands. These tools should make it possible to quickly compare alternative conceptual design solutions and to visualize possible consequences of the underlying design decisions.

Recent  advances  in  mathematical  models,  computer processors and OOP compilers have been motivating the development of the Domus program for whole-building hygrothermal simulation. The Domus program for simulation of multi-zone buildings has been developed in c++ language under C++ Builder environment, which is a fast and precise easy-to-use compiler. The program is available on  the  PC platform under Windows 9x and NT operating systems. The user interface consists of a series of windows in which the user can enter  the  relevant input data and review the results.

In the context of a european project dealing with the issue of transport safety improvement in fog conditions, an experimental building has been constructed on the FUL campus, in the southern part of Belgium.