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POD approach to determine in real-time the temperature distribution in a cavity

机译：POD方法可实时确定型腔中的温度分布

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摘要

In most buildings, heating, ventilation and air conditioning (HVAC) systems are controlled by indoor air temperature. However, the temperature sensor is often misplaced in the building and the measured temperature is not representative of the perceived temperature. In a context where the buildings must ensure good thermal comfort for the occupants while remaining energy efficient, the knowledge of the temperature distribution in the building is crucial. In this paper, we propose a method which enables to obtain in real-time the temperature distribution in a room. It is decomposed into two steps: an "offline" step and an "online" step. The offline step consists in constituting a database of several flow regimes (several Reynolds numbers and Rayleigh numbers) with CFD simulations. This sampling enables then to build a POD (Proper Orthogonal Decomposition) basis. In the online step, knowing the inlet and outdoor temperatures, the temperature in the occupation zone is obtained in real-time using an optimization algorithm and POD reconstruction. The velocity in the occupation zone is likewise determined. The method is approved on a tridimensional ventilated room. The results produce a good accuracy. Moreover, a parametric study has been made in order to determine the influence of the number and the position of the sensors and the kept POD modes number. (C) 2015 Elsevier Ltd. All rights reserved.
机译：在大多数建筑物中，供暖，通风和空调（HVAC）系统由室内空气温度控制。但是，温度传感器经常在建筑物中放错位置，并且测得的温度不能代表感知的温度。在建筑物必须确保居住者良好的热舒适性并保持高能效的情况下，了解建筑物中的温度分布至关重要。在本文中，我们提出了一种能够实时获取房间温度分布的方法。它分为两个步骤：“脱机”步骤和“在线”步骤。离线步骤包括使用CFD模拟来构建包含多个流动状态（几个雷诺数和瑞利数）的数据库。然后，通过这种采样可以构建POD（正确的正交分解）基础。在在线步骤中，了解入口和室外温度，使用优化算法和POD重建实时获取占用区域中的温度。同样确定占领区中的速度。该方法已在三维通风室获得批准。结果产生良好的准确性。此外，已经进行了参数研究，以确定传感器的数量和位置以及所保持的POD模式数量的影响。 （C）2015 Elsevier Ltd.保留所有权利。

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