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Fluids 2018, 3(4), 101; https://doi.org/10.3390/fluids3040101

A Method toward Real-Time CFD Modeling for Natural Ventilation

Harvard Center for Green Buildings and Cities, Harvard University, Cambridge, 02138 MA, USA
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Received: 24 September 2018 / Revised: 19 November 2018 / Accepted: 26 November 2018 / Published: 1 December 2018
(This article belongs to the Special Issue Ventilation and Passive Cooling for Healthy and Comfortable Buildings)
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Abstract

Natural ventilation is often used as a passive technology to reduce building energy consumption. To leverage the rule-based natural ventilation control to more advanced control at multiple spatial scales, mathematical modeling is needed to calculate the real-time ventilation rate, indoor air temperatures, and velocities at high spatial resolution. This study aims to develop a real-time mathematical modeling framework based on computational fluid dynamics (CFD). The real-time concept is implemented by using real-time sensor data, e.g., wall surface temperatures as boundary conditions, while data assimilation is employed to implement real-time self-calibration. The proof of concept is demonstrated by a case study using synthetic data. The results show that the modeling framework can adequately predict real-time ventilation rates and indoor air temperatures. The data assimilation method can nudge the simulated air velocities toward the observed values to continuously calibrate the model. The real-time CFD modeling framework will be further tested by the real-time sensor data once building construction is fully completed. View Full-Text
Keywords: zero energy; natural ventilation; sensor network; data assimilation; nudging zero energy; natural ventilation; sensor network; data assimilation; nudging
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Wu, W.; Wang, B.; Malkawi, A.; Yoon, N.; Sehovic, Z.; Yan, B. A Method toward Real-Time CFD Modeling for Natural Ventilation. Fluids 2018, 3, 101.

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