A Review of CFD Analysis Methods for Personalized Ventilation (PV) in Indoor Built Environments

Liu, Jiying; Zhu, Shengwei; Kim, Moon Keun; Srebric, Jelena

doi:10.3390/su11154166

Cited by 61 publications

(38 citation statements)

References 182 publications

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“…In the last two decades, numerous cities face serious problems of rapid urbanization [1,2], energy consumption [3][4][5][6][7], and climate change [8,9]. It is estimated more than 70% of people will reside in the built environment by 2050.…”

Section: Introductionmentioning

confidence: 99%

Quantifying Impacts of Urban Microclimate on a Building Energy Consumption—A Case Study

et al. 2019

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This paper considered an actual neighborhood to quantify impacts of the local urban microclimate on energy consumption for an academic building in College Park, USA. Specifically, this study accounted for solar irradiances on building and ground surfaces to evaluate impacts of the local convective heat transfer coefficient (CHTC), infiltration rate, and coefficient of performance (COP) on building cooling systems. Using computational fluid dynamics (CFD) allowed for the calculation of local temperature and velocity values and implementation of the local variables in the building energy simulation (BES) model. The discrepancies among the cases with different CHTCs showed slight influence of CHTCs on sensible load, in which the maximum variations existed 1.95% for sensible cooling load and 3.82% for sensible heating load. The COP analyses indicated windward wall and upstream roof are the best locations for the installation of these cooling systems. This study used adjusted infiltration rate values that take into account the local temperature and velocity. The results indicated the annual cooling and heating energy increased by 2.67% and decreased by 2.18%, respectively.

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Section: Introductionmentioning

confidence: 99%

Quantifying Impacts of Urban Microclimate on a Building Energy Consumption—A Case Study

et al. 2019

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“…However, for longer times, the results diverged. Applications in personalized ventilation were reviewed in [54].…”

Section: Rans Modelsmentioning

confidence: 99%

Improving the Energy Efficiency of Buildings Based on Fluid Dynamics Models: A Critical Review

et al. 2021

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The built environment is the global sector with the greatest energy use and greenhouse gas emissions. As a result, building energy savings can make a major contribution to tackling the current energy and climate change crises. Fluid dynamics models have long supported the understanding and optimization of building energy systems and have been responsible for many important technological breakthroughs. As Covid-19 is continuing to spread around the world, fluid dynamics models are proving to be more essential than ever for exploring airborne transmission of the coronavirus indoors in order to develop energy-efficient and healthy ventilation actions against Covid-19 risks. The purpose of this paper is to review the most important and influential fluid dynamics models that have contributed to improving building energy efficiency. A detailed, yet understandable description of each model’s background, physical setup, and equations is provided. The main ingredients, theoretical interpretations, assumptions, application ranges, and robustness of the models are discussed. Models are reviewed with comprehensive, although not exhaustive, publications in the literature. The review concludes by outlining open questions and future perspectives of simulation models in building energy research.

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“…In order to improve individual occupant satisfaction while saving a significant amount of energy, several studies highlighted the adequacy of personalized comfort systems, especially for those spaces with sedentary occupants, such as offices [12,[20][21][22][23].…”

Section: Personal Conditioning Systems: Energy Saving and Increased Cmentioning

confidence: 99%

Personalized Evaporative Cooler to Reduce Energy Consumption and Improve Thermal Comfort in Free-Running Spaces

Tejero‐González

Esquivias

2019

Sustainability

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The need to reduce energy consumption in buildings is imperative, but we must maintain individual thermal comfort of the occupants to ensure their well-being and productivity. Personal conditioning systems (PCS) have been suggested as a strategy to achieve both energy efficiency and thermal comfort, as they are considered to be low-energy consumers, allow increasing set-point temperatures, and give occupants the chance to control their own personal environment. While most warm-environment PCS are based on air-movement devices, the potential of using desk direct evaporative coolers (dDEC) has been scarcely explored. This work presents the results of the characterization of a dDEC and its potential for improving the indoor temperature and thermal comfort in a free-running office space. The study proposes adapted corrective power (CPa) and cooling fan efficiency for evaporative systems (CFEe) indexes. Results show that the dDEC achieves thermal comfort with a local effect, and it is recommended to be positioned directly on the desk surface, orientated to the occupant, and at a certain distance. Under these conditions, the CPa reaches −2.8 °C, involving better CFEe than the desk fans studied in the literature. Speed has little effect on the local air conditions, though it does improve the perception of thermal comfort. The relative humidity of the air does not exceed the recommendable limits, but renovation of the indoor air enables better conditions.

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A Review of CFD Analysis Methods for Personalized Ventilation (PV) in Indoor Built Environments

Cited by 61 publications

References 182 publications

Quantifying Impacts of Urban Microclimate on a Building Energy Consumption—A Case Study

Quantifying Impacts of Urban Microclimate on a Building Energy Consumption—A Case Study

Improving the Energy Efficiency of Buildings Based on Fluid Dynamics Models: A Critical Review

Personalized Evaporative Cooler to Reduce Energy Consumption and Improve Thermal Comfort in Free-Running Spaces

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