IBPSA2003

In recent years major advances have been made in the development of computational tools for architects to facilitate building performance evaluation. Most tools require expert knowledge and remain accessible primarily to building engineers or specialized architects.

Within the framework of energy  management in a tertiary building, it is necessary to evaluate the possibilities of cold energy storage. This study includes the consideration of ice storage for the air- conditioning of the buildings. To compare objectively the operating strategies, the manager needs to reproduce the ISS performances for the same conditions (building, cooling and electrical demands, climate conditions,...).

This  paper  presents  a  simulation  of  a  hybrid ground source heat pump system, performed using a new graphical user interface for HVACSIM+. Hybrid ground source heat pump systems incorporate both ground loop heat exchangers and supplemental heat rejecters, such as cooling towers, cooling ponds, or pavement heating systems. HVACSIM+ capabilities have recently been extended by the addition of ground loop heat exchanger models, water-to-water and water- to-air heat pump models, pavement heating system models, and heat rejection pond models.

In this paper, we present a new simulation program, TEKLA, for estimating energy use of residential buildings according to the European standard, EN832. The simulation program is written in MATLAB 6.2. The focus is to estimate variations of significant parameters influencing the energy use of the building. TEKLA can be used in design of new and retrofitted energy-efficient buildings. The model predictions are in good agreement with monitored data from an occupied residential building located in Umeå in northern Sweden.

In   the   summer   of   2002,   measurements   were simultaneously performed to investigate the characteristics of heat flow in urban areas at three locations in Kyoto city: 1) a commercial urban area mixed with low-rise traditional residential buildings that represents the urban area of Kyoto, 2) an university campus area with a lot of green zones, and 3) a plaza covered with a concrete slab which was used as a reference point of measurement.

A good tuning between building and installations plays a major role in achieving energy savings and a high quality of the indoor climate. To realize this match, it is necessary to have tools that can be used from the very beginning of the building design, that support the decision making and that enhance the communication within the design team. Last but not least, these tools should match the psychology of the engineer. H.e.n.k. is a software tool that tries to respond to this demand.

This paper explores the integration of an algorithm for the simulation of ground-source heat pump systems into a whole-building energy analysis program. GS2000™ is a software program released in 1995 for the sizing of ground source heat pump ground heat exchangers (also known as earth energy systems, geothermal heat pumps, and Geo- exchange systems) (Morrison, 1997). GS2000™ performs the ground loop heat transfer calculation, but requires the monthly building loads – as calculated by an energy simulation program.

A   comfortable indoor climate environment is necessary for modern buildings and therefore the Heating, Ventilation and Air-Conditioning (HVAC) systems are widely used. Faults or disturbances are normally unavoidable in the systems and they will lead to more energy consumption or degradation of comfort level of indoor climate. Energy consumption is useful to detect the faults. Fuzzy Neural Networks (FNN) model is presented and discussed in this paper.

This   paper   demonstrates   one   step   forward   in   the development of virtual laboratories that can be used for the development and test of HVAC control systems. While predefined parameters are used for standard tests, individual tests of controllers on  different building construction and types or for different boundary conditions need, for each test, new sizing of the components of the HVAC system.

A holistic approach to the design and procurement of a project should result in a building, which can become uniquely embedded in its natural, social and economic environments, like a living system. In a strange way my African experience has lead me to these ideas and I shall talk about why I think this has happened This conference has its focus on the importance of the role of simulation techniques and I shall show how  these  have  become  an  essential  part  of  the process.