Web-Based Services for Building Energy Management - WEBE

Nowadays, internet can be accessed anywhere, and www-based applications are widespread. Utilizing internet also for energy management and commissioning purposes will be a future trend. A web-based service for building energy management, called WebE, was developed at VTT. It is a modular and integrated service including several energy-related modules. This paper describes the main features of the WebE service modules. Also the system structure is briefly discussed

Dissecting a complex system; a computational study of flow behavior in a single-blade pump

Paper presented at the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July, 2007.In this paper a computational, time-accurate analysis of a single-blade pump, whose flow system is characterized by highly oscillatory behavior, is presented. The study lays bare the immanent challenges present in applying CFD to such complex flow systems. Four time-accurate simulations with different modeling choices are completed in order to reveal the computational flow system's sensitivities to such decisions and obtain reliable performance predictions for experimental comparison. The time-accurate simulations consistently overpredicted the hydrodynamic performance according to expectations, but demonstrated strong dependency on particular CFD aspects: The strictness of the numerical convergence and the changes in the inflow and outflow configurations have a considerable effect on the system's flow behavior. Elevated levels of uncertainty also accompany the transient simulations.cs201

ICT-supported concept of dynamic energy monitoring on a neighbourhood level

Energy efficiency of buildings may be improved using information provided by smart meters. They enable new services aiming at making the end-user aware of its energy consumption. Our vision is a neighbourhood of independent but co-operating buildings, with common aim to maximise their energy efficiency. Smart meters are the link between the buildings and the Neighbourhood Management System (NMS) which will control the community. The NMS will analyse the measurements, loads and available power in buildings and use simulation to forecast their behaviour to provide e.g. failure detection and load management. In this context a new concept has been developed. The concept illustrates an intelligent use of building energy information through a contest between several office buildings within a company. The idea is to combine both energy awareness and energy information benchmarking to create an incentive scheme for energy reduction in a tertiary environment