English

This paper investigates a new system for balancing the electrical grid by using dynamic simulation. It con-sists of a fuel cell that runs continuously to achieve high efficiency. To have the possibility to react to fluc-tuations in the electrical grid, the system additionally contains a certain number of heat pumps that use the electrical energy provided by the fuel cell, if it does not need to be fed into the grid. Thus, the system gen-erates and consumes power while keeping the grid in balance.

This paper describes the development of a simulation model using TRNSYS of a building integrated ground source heat pump with a cold phase change material thermal energy storage unit in a lightweight commer-cial building located in Marseille, France. The de-velopment of the overall system model involved the construction of individual models to simulate various components in the building, including a PCM tank, fan coil units, pumps, an air handling unit and the heat pump.

Context:  The case study presented here was carried out to assist the designers in making a decision about the use of chilled ceiling panels coupled with an air handling unit in a data center with limited usable ceiling area. Project Description:  A continually operational data control center, located on the sixth floor of a triangular-shaped building was used for this study. The building is located in Frankfurt, Germany. The tenants requested a constant 22°C operative temperature for the space while the outside air temperature is below 26°C.

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.