Publications associées à Air duct

Local heating and cooling effectiveness - an evaluation method based on calculated local and overall thermal state

The application of Personal Comfort Systems (PCS) in the buildings demonstrated their potential to improve thermal comfort and reduce energy use by the space conditioning HVAC systems. With its personal controllability (on-demand) PCS is a practical soluti ...

TU Delft2022

Experimental assessment of an active (acoustic) liner prototype in an acoustic flow duct facility

Hervé Lissek, Maxime Volery, Gaël Matten

In this paper, experimental results of broadband noise reduction in an acoustic flow duct are presented. An active liner composed of an array of electroacoustic absorbers is used. The control law is based on the pressure-based, current driven digital archi ...

SPIE2021

Model-based interpretation of floor vibrations for indoor occupant tracking

Ian Smith, Yves Sylvain Gilles Reuland, Slah Drira

Information regarding occupant flows inside buildings is beneficial for applications such as thermal-load control, market research and security enhancement. Existing methodologies for occupant tracking involve data-driven techniques that rely either on rad ...

2019

The Evolution of the Pompidou Centre's Air Conditioning System. Toward a new figure of architecture

Boris Hamzeian

The integration of technical services in architecture played a crucial role in the history of post-war construction. The Centre Pompidou, conceived and realized between 1971 and 1977 by the architecture studio Piano and Rogers and the engineering firm Ove ...

Construction History Society2018

Multi-Comfort Workshop Report

Vincent Kaufmann, Guillaume Simon Joseph Drevon, Dominic Villeneuve

Saint-Gobain’s Multi-Comfort approach (2017) promotes the importance of four criteria that can ensure comfort in the built environment: thermal, acoustic, visual and air quality comforts. Although this approach is transversal, other aspects that relate to ...

2018

On the Influence of Thermal Mass and Natural Ventilation on Overheating Risk in Offices

Flourentzos Flourentzou, Thomas Bernard Paul Jusselme, Arianna Brambilla, Jérôme Philippe Bonvin

Free cooling strategies are gaining importance in design practice due to the increased risk of overheating in well-insulated buildings with high internal loads such as offices. The state of the art highlights that the most efficient passive solution for in ...

2018

Predictive Control of Buildings for Demand Response and Ancillary Services Provision

Faran Ahmed Qureshi

This thesis develops optimization based techniques for the control of building heating, ventilation, and air-conditioning (HVAC) systems for the provision of demand response and ancillary services to the electric grid. The first part of the thesis focuses ...

EPFL2017

Optimal Sensor Architecture Selection for Health Management of Complex Systems

Martin Vetterli, Juri Ranieri

With technological progress, humans tend to create engineering systems with constantly increasing complexity and higher operational requirements. Many complex systems require the use of a Health Management (HM) solution to ensure safety and enable lifecycl ...

Ieee2016

Performance of novel ventilation strategy for capturing CO2 with scheduled occupancy diversity and infiltration rate

Moon Keun Kim

This paper proposes a novel ventilation strategy for capturing CO2 with scheduled occupancy diversity, and changes in recirculating ratio and infiltration rate. While many publications have described filters and a lamp that can efficiently capture and remo ...

Pergamon-Elsevier Science Ltd2015

Use of model predictive control and weather forecasts for energy efficient building climate control

Colin Neil Jones

This paper presents an investigation of how ModelPredictiveControl (MPC) and weatherpredictions can increase the energy efficiency in Integrated Room Automation (IRA) while respecting occupant comfort. IRA deals with the simultaneous control of heating, ve ...

Elsevier2012

Fluid-Structure Coupling Effects on the Dynamic Response of Pump-Turbine Guide Vanes

Steven Roth

Hydraulic pump-turbines are subject to a high periodic excitation due to the Rotor-Stator Interaction, RSI. Basically, the RSI is caused by the impeller blade passage in the wake of the guide vanes in generating mode, or upstream from the guide vanes in pu ...

EPFL2012

Analysis of energy savings potentials for integrated room automation

Colin Neil Jones

The energy savings potential of selected low-cost measures related to the simultaneous control of blinds, electric lighting, heating, cooling and ventilation in a single building zone (Integrated Room Automation) was investigated. The analysis was based on ...

2010

One-Dimensional Modeling of Rotor Stator Interaction in Francis Pump-Turbine

François Avellan, Christophe Nicolet, Nicolas Ruchonnet

A one-dimensional hydroacoustic model is set up to perform the numerical simulation of the rotor-stator interaction of a Francis pump-turbine scaled model. The numerical results enable to identify both rotating diametrical modes in the vaneless gap between ...

2006

One-Dimensional Modeling of Rotor Stator Interaction in Francis Pump-Turbine

François Avellan, Christophe Nicolet, Nicolas Ruchonnet

A one-dimensional hydroacoustic model is set up to perform the numerical simulation of the rotor-stator interaction of a Francis pump-turbine scaled model. The numerical results enable to identify both rotating diametrical modes in the vaneless gap between ...

International Association For Hydraulic Research2006

Tracer Gas Measurement of Airflow Rates in Spaces with Several Air-Handling Units, Recirculation, or Large Time Constants

Claude-Alain Roulet

Methods to measure airflow rates using tracer gas in single air handling units are well known. In some buildings however, in particular in Singapore, rooms are often ventilated with two or more units and present large recirculation rates. Large recirculati ...

2006