Performance evaluation of a waste-heat driven adsorption system for automotive air-conditioning: Part I - Modeling and experimental validation

[EN] Adsorption systems driven by engine waste heat are one of the possible alternatives to the conventional automobile air conditioning in terms of energy savings and environmental issues. Assessment of this issue are carried in a two-part study. In this first part I, theoretical and experimental investigations were performed on a two bed, silica gel adsorption chiller for automotive applications. A prototype adsorption system with a total weight of about 86 kg was developed and tested to driven by low-grade waste heat. The single adsorbent bed consisted of three plate-fin heat exchangers connected in parallel. An improved non-equilibrium lumped parameter model was developed to predict the transient performance of the system. The model is fully dynamic and takes into account the mass transfer resistance and pressure drop for each component of the system. The results showed that the model is able to accurately predict the dynamic performance of the system under different operating conditions and configuration modes with a short calculation time. The tested chiller was able to produce an average cooling capacity of about 2.1 kW with a COP of 0.35 at the rated operating conditions. Heat recovery system results in increasing the COP by 43% and the cooling power by 4%. (C) 2016 Elsevier Ltd. All rights reserved.This work has been partially supported by the European project TOPMACS-Thermally Operated Mobile Air-Conditioning Systems, funded by the European Comission under the 6th European Community framework program FP6-SUSTDEV - Sustainable Development, Global Change and Ecosystems: thematic priority 6 under the Focusing and Integrating Community Research programme 2002-2006. (Contract Ref. TST4-CT-2005-012471. The authors are very grateful to the Energy Research Center of Netherlands (ECN) for their support in the experimental work.Verde Trindade, M.; Harby Mohamed Abd Alaal, K.; De Boer, R.; Corberán, JM. (2016). Performance evaluation of a waste-heat driven adsorption system for automotive air-conditioning: Part I - Modeling and experimental validation. Energy. 116:526-538. doi:10.1016/j.energy.2016.09.113S52653811

3D reconstruction for tele-immersion in 360° live stream

International audienceNowadays, most volumetric tele-immersion systems are based on a multi-camera system to capture a dynamic 3D place. With these acquisition devices, the development of a mobile tele-immersion system seems compromised, as a lot of equipment would have to be moved. One promising way to achieve a mobile system would be to use a single 360° camera and develop ways of reconstructing in 3D a dynamic scene in real time from a single point of view. Therefore, we propose an approach to freely navigate into a 360° video captured with a static camera. The approach considers three types of elements in the scene, the environment, the object of interest and the people, and relies on a different 3D representation for each type of element. Distinguishing the scene elements enables a real-time method to be adopted, by reconstructing static elements once and using fast-computable 3D representations for dynamic elements. As the method is real-time, we develop a streaming pipeline to enable XR users to move live within the camera stream