Identifying spatiotemporal information of the point pollutant source indoors based on the adjoint-regularization method

Article Construction & Building Technology

Estimation of the natural gas leakage source with different monitoring sensor networks in an underground utility Tunnel: From the perspectives of energy security

Kang Zhou et al.

Summary: This study developed a gas-monitoring sensor network for utility tunnels through experiments and simulations, enabling accurate identification of natural gas leakage sources in order to enhance energy security in the city.

ENERGY AND BUILDINGS (2022)

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Article Construction & Building Technology

Evaluation of SARS-COV-2 transmission and infection in airliner cabins

Wensi Wang et al.

Summary: Commercial airliners have played a significant role in the global spread of the SARS-CoV-2 virus. Using computational fluid dynamics, this study simulated the transmission of the virus on two flights. The results suggest that wearing masks and reducing conversation frequency can help mitigate the risk of exposure to the virus.

INDOOR AIR (2022)

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Article Construction & Building Technology

Inverse regulation of the indoor environment: An overview of the adjoint method

Xingwang Zhao et al.

Summary: This paper presents an overview of the adjoint method for inverse regulation of the indoor environment, discussing its accuracy, efficiency, function, and global optimality. The combination of multiple methods is found to be the best choice for improving the efficiency of inverse identification. Probability-based adjoint methods and finite element methods are used to broaden the application scope of the adjoint method. However, manual derivation of adjoint equations and development of solvers remain major challenges for new researchers in this field, calling for the development of user-friendly methods or solvers to facilitate the popularization of this method.

ENERGY AND BUILDINGS (2022)

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Article Thermodynamics

Estimation of pollutant sources in multi-zone buildings through different deconvolution algorithms

Mo Li et al.

Summary: Efficient identification of pollution sources is crucial for indoor air quality management. This study proposed an optimization method for deconvolution process in source strength inverse calculation, combining different filtering positions and algorithms. Experimental results showed that Butterworth filtering performed better, and the SART algorithm yielded higher accuracy and stability in source strength identification.

BUILDING SIMULATION (2022)

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Article Construction & Building Technology

Sensor configuration optimization based on the entropy of adjoint concentration distribution for stochastic source term estimation in urban environment

Hongyuan Jia et al.

Summary: This study proposes a method for sensor configuration optimization to ensure good source term estimation performance. The results show that the optimal configuration provides the most informative measurements and yields the best estimations.

SUSTAINABLE CITIES AND SOCIETY (2022)

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Article Construction & Building Technology

Investigation of airborne particle exposure in an office with mixing and displacement ventilation

Sumei Liu et al.

Summary: Effective ventilation is crucial in reducing the spread of COVID-19 in buildings. This study compared the performance of a mixing ventilation (MV) system and a displacement ventilation (DV) system in terms of air temperature and particle concentration. Increasing the ventilation rate reduced the particle concentration, but the improvement was not proportional to the ventilation rate. The DV system had a higher ventilation effectiveness than the MV system, making it a better choice for indoor air quality.

SUSTAINABLE CITIES AND SOCIETY (2022)

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Review Construction & Building Technology

Airborne transmission of COVID-19 virus in enclosed spaces: An overview of research methods

Xingwang Zhao et al.

Summary: This study summarized the transmission mechanisms of COVID-19 and their influencing factors, and reviewed various research methods including mathematical models and experimental approaches. It emphasized the importance of experimental methods in proving the possibility of airborne transmission.

INDOOR AIR (2022)

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Article Environmental Sciences

An experiment-based impulse response method to characterize airborne pollutant sources in a scaled multi-zone building

Junyi Zhuang et al.

Summary: This study successfully established a method for estimating source terms in multi-zone buildings using experiment-based impulse response, and conducted uncertainty analysis by combining errors from sensors and systematic responses.

ATMOSPHERIC ENVIRONMENT (2021)

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Article Construction & Building Technology