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This paper presents a new model-free control (MFC) mechanism that enables the local distribution level circuit consumption of the photovoltaic (PV) generation by local building loads, in particular, distributed heating, ventilation and air conditioning (HVAC) units. The local consumption of PV generation will help minimize the impact of PV generation on the distribution grid, reduce the required battery...
Major challenges in the simulation of pedestrians are the realistic behaviour of agents, realistic appearance and variety, and how to conveniently define larger crowds of pedestrians. In this paper, pedestrian behaviour in buildings is analysed and structured in order to develop a behavioural model for buildings with high pedestrian flows. Observing pedestrians at a larger train station is used as...
Fault Detection, Diagnostics and Prognostics (FDD&P) is attracting a lot of attention from building operators and researchers because it can help greatly improve the performance of building operations by reducing energy consumption for heating, ventilation and air-conditioning (HVAC) while improving occupant comfort at the same time. However, FDD&P for building operations remains with many...
Reducing the operating energy costs of commercial buildings is an important problem faced by the facility managers. Additionally, energy cost from heating-ventilation-air-conditioners (HVAC) is a significant fraction (often greater than 50%) of the overall operational cost of these buildings. In this paper, we propose a pre-cooling framework that uses a “gray box” thermal model of a building to compute...
A suboptimal hierarchical approach for the management of demand response events (DRE) is proposed. We introduce a DRE model that explicitly accounts for on/off loads and leverages the inherent storage capacity of thermal loads provided by their inertia. Our approach can compute in a tractable time a feasible suboptimal solution to the DRE management problem, while user privacy is preserved. We present...
DACCOSIM is a multi-simulation environment for continuous time systems, relying on FMI standard, making easy the design of a multi-simulation graph, and specially developed for multi-core PC clusters, in order to achieve speedup and size up. However, the distribution of the simulation graph remains complex and is still the responsibility of the simulation developer. This paper introduces DACCOSIM...
As Smart Grids move closer to dynamic curtailment programs, Demand Response (DR) events will become necessary not only on fixed time intervals and weekdays predetermined by static policies, but also during changing decision periods and weekends to react to real-time demand signals. Unique challenges arise in this context vis-a-vis demand prediction and curtailment estimation and the transformation...
The prime goal in automation systems is to increase productivity while at the same time save production costs. Nevertheless, in recent years there is increasing concern about the ecological footprint of production systems and a growing demand for energy optimization. Heating, ventilating and air conditioning (HVAC) systems in large industrial buildings consume a substantial amount of energy and typically...
This paper proposes a novel distributed architecture for controlling Heating, Ventilation and Air conditioning (HVAC) systems in commercial buildings. Zone Modules use local models and measurements to compute requests for HVAC service over various future time windows. These requests are expressed in terms of the heating/cooling service required which we can conceptually regard as tokens. A Central...
This paper is about system simulation and co-simulation issues such as interoperability. The Functional Mock-up Interface (FMI1) which is proposed as an interoperability standard has been studied in the field of the building energy systems to make an effective co-simulation of different models with heterogeneous time constants. A chaining algorithm based on scalar value exchanges is presented. Our...
The growing population has added a burden to the existing power generation station. So what if the demand by the people exceeds the generation capability. The consequence is power deficiency. The world has to remain in dark weighing down the economy of the country. The alternative solution for this is generation mix. Now a day's commercial building is increasing at a greater pace. So in addition to...
Design and efficiency of houses can affect the amount of peak load reduction available from a residential demand response program. Twenty-four houses were simulated with varying thermal integrity and air conditioner size during the summer cooling season with and without a demand response program. Improved house thermal integrity reduced the effectiveness of the demand response program in limiting...
Nowadays a number of energy simulation tools are available for analyzing the probable energy implications and related impacts of the proposed building project. These tools work on the information about the various aspects of proposed building - either input by the user or imported from CAD tools. Extraction of building data directly from the 2D CAD tools is still in preliminary stages and is part...
In order to build reliable and robust structures for the future power supply, flexibilities of electrical generation, consumption and storage have to be increased. Within Dual Demand Side Management, the feasibility of a city quarter to manage locally its energy supply and to stabilize the regional grid is investigated. The concept focuses on the potential thermal storage systems provided by the existing...
A building energy consumption model is presented. The purpose of the model is to provide a test bed to develop Dynamic Load Control (DLC) algorithms and investigate the implications of these to humans in office buildings. The idea of Dynamic Load Control is to manage loads in such a way that the power available from unpredictable sources can be utilized most effectively. In the case of buildings,...
Novel test detection is an approach to improve simulation efficiency by selecting novel tests before their application [1]. Techniques have been proposed to apply the approach in the context of processor verification [2]. This work reports our experience in applying the approach to verifying a commercial processor. Our objectives are threefold: to implement the approach in a practical setting, to...
This paper presents a model reduction method based on balanced realization for thermal and power models of buildings. System identification is firstly performed to obtain high-order state-space models. The purpose of model reduction is to simplify the model structure while preserving the major input-output relations, so as to lower the computational cost in the subsequent model predictive control...
Controlling electric loads to deliver power system services presents a number of interesting challenges. For example, changes in electricity consumption of Commercial and Industrial (C&I) facilities are usually estimated using counterfactual baseline models, and model uncertainty makes it difficult to precisely quantify control responsiveness. Moreover, C&I facilities exhibit variability in...
This paper presents a systematic development process of whole-building energy models as performance benchmarks for retrofit projects. Statistical regression-based models and computational performance models are being used for retrofit projects in industry but these require existing utility data for calibration and validation. Furthermore, a common retrofit design question is the prioritization of...
When the finite element analysis of masonry structure are conducted by using micro-model, the stress-strain curves of brick and motar are necessary. 20 sintered shale brick prisms, 20 autoclaved lime-sand brick prisms and 40 mixed mortar prisms in axial compression were tested. The stress-strain curves, prism compressive strength, elastic modulus and Poisson's ratio of brick and mortar were obtained...
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