IBPSA2013

The present contribution aims at a typical example of a low-energy house to repeat the known facts in environmental assessment of buildings, emphasize the need to use transient calculations of energy demand not only to optimize building envelope and operation of buildings but also in the assessment of their life cycle. It also outlines a possible way of comparing the built and operational energy within the life cycle of buildings, as a contribution to the debate on the implementation of the second Energy Performance of Buildings Directive (EPBD II). 

In this paper, the energy management system that has been developed for the CANOPEA building is detailed. It is based on a virtual represen-tation of the building system including envelope, do-mestic appliances and technical appliances. The paper presents a core high level language to model build-ing systems and a projection mechanism to generate mixed integer linear programming problems used for the generation of energy management strategies. It has been applied to the generation of energy management strategies for the CANOPEA building system.

Climate change and rising energy costs necessitate a shift in how buildings that efficiently provide comfort are envisioned. With initiatives now aiming at bringing energy simulation into the mainstream of environmental design, the applicability of state-of-the-art simulations in formally non-constrained creative production needs to be re-evaluated.

In this paper, the thermal behaviour of a ventilated window is studied. The particularity of this system is the existence of an airflow passing between the glasses of a triple glazing. The aim is to preheat outdoor air entering the room both by heat loss recovery and by solar gains. To evaluate the thermal performances of the window, a 2D model simulating the heat and mass transfers within the airflow window has been developed, and validated from experimental results. The effects of several parameters on thermal performances are investigated, e.g.

This paper examines the creation of a new simulation tool designed to integrate the results of energy consumption models into the carbon projections for large portfolios of buildings. This is accomplished through the creation of the Individual Building Worksheet (IBW), which was designed to integrate with calculators and projections derived from the CACP Carbon Calculator.

Considerable progress has been made in the field of building simulation for combined heat, air and mass transfer processes occurring in the indoor environment, yet concerns persist over the reliability and suitability of moisture property data integrated into available tools and the approaches taken in modelling physical phenomena. Particular interest lies in predicting the impact of indoor moisture production schemes and sources observed in housing, linked to occupant activity.

The aim of this paper is to develop a new concept of sketch tools for the very steps of the design process. The originality lies in the use of optimization to define a global design of the building, the energy system and the control strategy. Therefore, an adapted model of the building has been realized, not directly using fine dynamic models (like those that can be found in tools TRNSYS, DOE2.2 and EnergyPlus...), but more coarse equations adapted to the sketch design phase. Those models are based on static and macroscopic equations investigating energetic and financial balances.

Results of this study show how heat mitigation effects of planting elementary school lawns in urban regions differ according to eight school building configurations and two surrounding building models. Results show the following. 1) Heat mitigation effects with high-rise buildings (MODEL_H) are higher than those with normal height buildings (MODEL_N) for eight school building configurations. 2) For MODEL_H, with higher surrounding buildings, enclosure-type school building configurations show high heat mitigation effects of lawns in terms of temperature differences.