Concept

Airflow

Publications associées (32)

Pcm-based heat exchanger and uses thereof

Véronique Michaud, Sophia Haussener, Matthieu Gani, Lucas Fuentes Valenzuela, Marc Roulin

A PCM-based heat exchanger is disclosed, said phase change material (PCM)-based heat exchanger comprising: a) a case having insulated walls comprising an inlet and an outlet; and b) a plurality of modules comprising a support structure containing a phase c ...

2019

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

Occupant Satisfaction in 60 Radiant and All-air Building

Caroline Karmann

Radiant heating and cooling systems have the potential to save energy and are widely used in zero net energy buildings. Their positive and negative impacts on indoor environmental quality and, in particular, thermal comfort compared to all-air systems are ...

2018

Life cycle efficiency ratio: a new performance indicator for a life cycle driven approach to evaluate the potential of ventilative cooling and thermal inertia

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

Building envelope design has gained importance as a means to reduce heating and cooling demand related to a building’s operational phase. However, in high internal load buildings, such as offices, internal gains can easily lead to overheating. Thermal iner ...

2018

Experimental comparison of the thermal indoor environment created by a radiant, and a combined radiant and convective cooling system

Dolaana Khovalyg

This study reports the results from an experimental comparison of two cooling systems. The studied systems were a radiant cooling system (radiant ceiling panels and mixing ventilation), and a combined radiant and convective cooling system (combination of a ...

2018

Channel-to-channel heat flux variation in compact minichannel heat exchangers due to the effect of louvered fins

A typical minichannel evaporator used in AC&R applications is made of stacked parallel aluminum extruded multiport plates and louvered fins placed between them. In this configuration cold refrigerant flows inside the ports, and hot air passes though the lo ...

2017

Instability of flow boiling in paralell microchannels

Heat exchangers are key components of energy conversion systems, including HVAC&R equipment. The compact microchannel design of a heat exchanger (MCHX) allows for significant reduction of its volume, weight, and raw material, in comparison to conventional ...

University of Illinois at Urbana-Champaign2017

Experimental evaluation of the thermal performances of a thermosyphon cooling system rejecting heat by natural and forced convection

John Richard Thome, Filippo Cataldo

In the present paper, a closed-loop thermosyphon cooling system for power electronics has been developed and tested. The evaporator is a multi-microchannel heat sink designed for high heat fluxes. The power electronics module is emulated by four independen ...

Pergamon-Elsevier Science Ltd2017

Towards automated inference of occupant behavioral dynamics using plug-load energy data

Andrew James Sonta

When building systems and occupants use energy, they create data—much of it unstructured and characterized as long running time series. Energy data captured at the plug level offers an opportunity not only to analyze highly granular building activities, bu ...

2017

Airflow Characteristics and Pollution Distribution Around a Thermal Manikin--Impact of Specific Personal and Indoor Environmental Factors.

Dusan Licina

This study presents a summary of experimental measurements on the airflow characteristics and pollution distribution around a non-breathing thermal manikin. The two objectives are: (1) to examine the extent to which personal (body posture, clothing insulat ...

2016

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