Elsevier

Energy and Buildings

Volume 196, 1 August 2019, Pages 145-156
Energy and Buildings

Experimental study on a comprehensive particle swarm optimization method for locating contaminant sources in dynamic indoor environments with mechanical ventilation

https://doi.org/10.1016/j.enbuild.2019.03.032Get rights and content

Highlights

  • A comprehensive particle swarm optimization method was presented.

  • A source localization system with three mobile robots was developed.

  • A typical dynamic indoor environment with mechanical ventilation was studied.

  • The method was experimentally validated with two typical source locations.

  • The method has a much higher success rate than other two methods.

Abstract

Source localization is critical to ensuring indoor air quality and environmental safety. Although considerable research has been conducted on source localization in steady-state indoor environments, very few studies have dealt with the more challenging source localization problems in dynamic indoor environments. This paper presents a comprehensive particle swarm optimization (CPSO) method to locate a contaminant source in dynamic indoor environments with mechanical ventilation and develops a multi-robot source localization system to experimentally validate the method. Three robots were used to test the presented method in a typical dynamic indoor environment with periodic swinging of the air supply louvers of a cabinet air conditioner. The presented method was validated with two typical source locations, DS (in the downwind zone) and RS (in the recirculation zone). For DS and RS, 15 and 14 experiments out of 15 experiments were successful, with success rates of 100% and 93.3%, and each robot moved an average of 24.4 and 23.6 steps, respectively. The presented method was also compared with the standard particle swarm optimization (SPSO) and wind utilization II (WUII) methods for locating the source at DS. For the SPSO and WUII methods, only 3 and 6 experiments out of 15 experiments were successful, with success rates of 20% and 40% and averages of 33.0 and 38.0 steps, respectively. The experimental results show that the presented method not only has a much higher success rate than the SPSO and WUII methods but also has higher source localization efficiency.

Keywords

Time-varying airflow
Mechanical ventilation
Contaminant source
Source localization
Robot active olfaction
Experimental validation

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