The energy efficiency of switchable (variable transmittance) windows having a control system based on occupancy, temperature and impinging solar radiation is evaluated.
Technological advances in real-time data collection,data transfer and ever-increasing computational power are bringing simulation assisted control and on-line fault detection and diagnosis closer to reality than was imagined when Building Energy Management Systems were introduced in the 1970s. This paper describes the development and testing of a prototype simulation assisted controller, in which a detailed simulation program is embedded in realtime control decision making.
The paper is focused on the application of the simulation in the field of the space heating systems, based on the infrared radiant heaters. In the first part is preview of different sw packages. In the second part there is a case-study of local heating design evaluation, where two different sw packages are used. Hefaistos is used to design the layout of the heaters, ESP-r is used to investigate the energy consumption and time dependent temperature variation.
While recent advances in computational building performance modeling have been remarkable, their impact on building design community has been limited. In this paper we focus on one possible contributing factor, i.e., insufficient support for navigation in design-performance space. To address this shortcoming, we concentrate on a process that involves: i) generation of alternative building designs, ii) performing parametric performance simulations, and iii) exploration of the resulting design-performance information space.
Computational performance-based building design support faces a conflict. It is important to provide building performance feed back to the designer as early as possible in the design process. But many aspects of building performance are significantly affected by the design of the building’s technical systems, which are typically configured in detail only in the later stages of design.
COMIS simulates multizone airflow and pollutant transport. It has been developed in an international context at LBNL and within IEA Annex 23. At the end of Annex 23, EMPA took over the coordination of further developments, and – together with CSTB – the maintenance of COMIS. In January 2001, the "COMIS v3.1 with IISiBat v2.4" package was released, and is available now from CSTB.
The paper describes the main features of the new simulation environment ColSim [15] and a special application for investigating ventilation strategies in buildings. ColSim was developed with the intention of simulating and testing complex control strategies in different HVAC and thermal solar systems, coupled to a building model. It is based on a modular structure and a modified Euler algorithm was chosen for the numerical integration of the nonlinear differential equations.
CODYBA is a software addressed to designers, teachers and research organisms. This software determines the energetic fluxes of a building zone. The basic data are the zones geometry and constitution. The main parameters are the climatic conditions, the internal loads and the heating and air conditioning powers, as well as their regulation mode.
In addition to the fact that the serviceability of building constructions used as exhibition halls has to be ensured, the climate stability of the whole structure has to be increased. Exemplary building physical calculations with transient boundary conditions (simulations) were set off by the aim to modernize the “ Herzog-Anton-Ulrich-Museum” in Brunswick.
This paper deals with comparison between the CFD method and the zonal one, and also model experimental validation. The zonal method consists of a dwelling decomposition in several isothermal air zones, in contact with walls.
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