IBPSA2013

There is an unexploited opportunity to employ either fully naturally ventilated, or partially, when mixed with mechanical ventilation in buildings in Mediterranean climate. The possibility of exploiting natural ventilation due to complexity of physical phenomena that is non-linearity, chaotic behaviour of air movement, demands a major tool  “Computational Fluid Dynamics” (CFD)1 for design analyses. Fluent was used to study the airflow and temperature distribution in the occupied spaces evaluating different possibility of exploiting natural ventilation for different outside conditions.

A 2D axisymmetric ODE model that couples heat transfer and groundwater flow in and around a stand-ing column well system was developed by the means of a thermal resistance and capacity network. In this work, the real transient behaviour of the groundwa-ter velocity field and well drawdown is considered by applying the spatial and temporal superposition of the so-called Theis equation, resulting from the time vary-ing bleed flow. The temperature field is obtained by integrating an ODE system.

Increasing daylight into indoor swimming pools creates a warm and sunny environment for swimmers and provides connections with the outdoor environment.  However, lifeguards report that veiling reflection from the water surface, a result of this daylighting, limits visibility into pool basins.  Thus, the veiling reflection caused by increased daylight affects the safety of swimmers. A study was conducted to develop a Design Guidelines, intended for the Hong Kong government and local professional practitioners, to reduce the occurrence of veiling reflection on water surfaces.

The urban complex with multi-function and multi-form has become an important architectural mode in the modern urban development process. By combining the building features of urban complex and the types of its air conditioning system, an urban complex thermal climate prediction model was developed and applied in a southern planning project as an actual subject to simulate and analyze the outdoor thermal climate in urban complex.

The present contribution describes an approach to implement simulation-powered virtual sensors in a building information framework. Measurements from physical sensors are used to calibrate simulation models. Subsequently, virtual sensors can derive information on parameters that are either difficult or expensive to measure. The presented building data service provides a uniform interface to virtual and physical sensors.