The design of monitoring system for distnbuted energy and heat supply is presented in the paper. The analysis of monitoring system and the phase of pre-design was done by means of Object Modelling CASE Tool, the designed system was implemented in LONWORKS HW and SW environment The function of communication modules providing data transmission from distanced energy and heat supply system have been verified and a typical result of qualitative simulation of the distanced complex behaviour is presented.
The physics of moisture transfer is complex and as a result modelling is normally carried out on a macroscopic basis, with empirical coefficients used to simulate the transport process. These coefficients are not single values but depend on the moisture content of the material. The application of this data within the simulation environment requires the determination of a systematic methodology for its presentation. This paper investigates the transport coefficient referred to as the vapour (or moisture) permeability.
This paper presents the theoretical modelling work of an elementary urban units (street), thermal behaviour. The calculation code Codyflow was set up as a way to model the thermal response (structure surface temperature and ambient air temperature) of an urban system to the solicitations of the outside climate.
This article presents a study of a building-equipment coupled system performed at the Gaz de France R & D Division. The commercial building under study is equipped with an air-conditioning installation which includes a gas-fired dual-seJVice absorption machine. One of the aims of this study is to compare various air conditioning systems on the basis of both technical and economic criteria. The building, its air-conditioning installation and the large-scale experimental monitoring programme are presented.
This paper reports the current state of an ongoing collaborative project which aims to promote modelling and simulation of energy in buildings by making self-learning course material available on the World Wide Web (WWW).
Computer based design aids have much potential to improve the productivity of the design process and provide more confidence in the performance of a building. Although sophisticated design aids have existed for some time there is still a reluctance to use them to full advantage. This is particularly true of the strategic phase of building design. The barriers to the use of computer models are explored and the means by which they can be overcome via the education of post-graduate students and practising professionals are discussed.
Since two years, the Dutch building consultancy practice has been supported by an integrated design environment to base its advices on. This environment, called the Uniform Environment or UO in Dutch abbreviated form, has been developed by the Association for Computerisation in the Building and Installation Technology (VABI) and TNO Building and Construction Research. The basic principle of the UO is that all data, associated with a building project, is stored in one database, irrespective of the design tools being used in the project.
A new integrated simulation system for the building services design and facilities management purposes is being developed by Insinööritoimisto Olof Granlund Oy. The system covers the thermal simulation needs of the whole building life cycle from the preliminary design to renovations. The main components of the simulation system are a simulation database, user interfaces, a result module, a building geometry modeller and a calculation engine. The building geometry modeller generates a 3-D surface model of the building. The calculation engine of the first version is DOE 2.1E.
In this paper, the parameters in a building thermal simulation model are tracked, which are subject to modeling uncertainty, i.e. uncertainty arising from commonly applied physical assumptions and simplifications. As an example, the simulation of the thermal comfort performance of a naturally ventilated office building without cooling plant is analyzed.
If a map of a city is encoded as a Digital Elevation Model, it becomes amenable to image-processing software, such as the public-domain NIH Image application. Standard techniques can be used to measure plan areas and volumes and simple macros can be devised to measure perimeter length and wall areas. A macro for calculating shadow volumes is elaborated for the simulation of solar gains and daylight, including indirect lighting, leading to the possibility of an image-based urban-scale environmental model.
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