Analysis of lighting conditions of indoor living walls: Effects on CO2 removal

Dominici, Laura; Fleck, R.; Gill, Raissa L.; Pettit, Thomas; Irga, Peter J.; Comino, Elena; Torpy, Fraser R.

doi:10.1016/j.jobe.2021.102961

Cited by 13 publications

(11 citation statements)

References 45 publications

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“…Overall, the tested species attained 50-65% of their maximum CO2 removal rates at an intensity equivalent to or below 350 μmol PARm −2 s −1 (Torpy et al, 2014). The process of photosynthesis is dependent on the availability of sufficient light and higher light intensities were found to have a significant positive effect on net CO2 (Dominici et al, 2021). However, CO2 production resulting from plant respiration and rhizosphere, the narrow region of soil or substrate that is directly influenced by root, could have counterproductive effects in indoor environments under certain environmental factors such as low levels of irradiance (less than 1,000 lux) or during prolonged diurnal dark phases (Daugaard et al, 2019).…”

Section: Introductionmentioning

confidence: 91%

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confidence: 99%

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Developing a digital workflow to estimate green walls’ performance for enhancing indoor air quality.

Jafar,

Jabi,

Lannon

2023

Building Simulation Conference Proceedings

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Vertical greening systems, or living walls, are increasingly used indoors due to their potential to improve air quality by mitigating excess Carbon Dioxide (CO2) levels (Dominici et al., 2021). This study introduces a parametric workflow that utilizes digital light simulations to estimate the performance of green walls in terms of their ability to perform photosynthesis and subsequently reduce indoor CO2 levels. To accomplish this, the workflow uses the Rhino inside Revit plugin to identify any Revit model and then uses Rhino plugins, Grasshopper and Honeybee to simulate cumulative radiation on a grid of sensors on each leaf, after that the plant leaves' capacity to perform photosynthesis based on the compensation point of light and calculates the amount of CO2 reduction accordingly was tested. The workflow was applied in the study using a sample plant, Epipremnum aureum. This research demonstrates that early-stage simulations using the proposed parametric workflow can provide valuable insights for architects and designers to make informed decisions regarding the positioning and orientation of indoor green walls. The study suggests that different performance outcomes can be estimated depending on light levels, highlighting the importance of using sunlight simulation strategies in the early design stages when considering implementing green walls in indoor environments. However, further validation of the proposed workflow against physical lab tests is necessary to enhance its reliability and accuracy. Highlights• Avoiding the negative effect of using vegetationbased solutions such as green walls by implementing early stages studies. • Proposing performance-based simulation to bridge the gap between lab testing and in-situ studies of green walls. • Enhancing indoor air quality by using early stages simulations for green wall implementations. • A Parametric workflow to estimate and optimize green walls performance in early design stages.

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Section: Introductionmentioning

confidence: 91%

“…

…”

mentioning

confidence: 99%

Developing a digital workflow to estimate green walls’ performance for enhancing indoor air quality.

Jafar,

Jabi,

Lannon

2023

Building Simulation Conference Proceedings

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“…Plants adapt to low light conditions by altering leaf orientation to maximize light cap-ture at the leaf surface. Moreover, this photosynthetic process acts as a crucial regulator of temperature and humidity balance in the atmosphere (Dominici et al, 2021). Clear Air Delivery Rate (CADR) is often used to evaluate indoor air purifying systems (Rai, 2022).…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Particulate Matter and Carbon Dioxide Reduction of Four Broad-leaved Evergreen Plants

Bui,

Jeong,

Kim

et al. 2024

J. People Plants Environ

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Background and objective: Since people spend 70-80% of their time indoors, the quality of indoor air has become a crucial factor in overall health. Therefore, poor indoor air quality can have significant adverse effects on our well-being. Common indoor air pollutants are particulate matter (PM) and carbon dioxide (CO2). Plants can remove PM and CO2 through the photosynthesis process and leaf surfaces, and regulate the temperature and humidity of the air. By analyzing the PM and CO2 reduction of four broad-leaved evergreen plants, this study aims to provide data for air purification in indoor spaces.Methods: The four different plant species (Neolitsea sericea (Blume) Koidz., Coffea arabica L., Photinia glabra(Thunb.) Franch. and Sav., and Farfugium japonicum (L.) Kitam.) were selected for this study. Mosquito coils and a CO2 cylinder were the primary sources of PM and CO2. These pollutants were injected into a closed acrylic chamber with plants, and the air quality within the chamber was monitored for a duration of five hours. The plants' effectiveness in reducing carbon dioxide was evaluated through the clean air delivery rate (CADR), while their ability to reduce PM was assessed by analyzing the PM reduction rate. Photosynthetic rates and leaf area were also measured to determine the correlation between air pollution removal and these factors.Results: The ability to remove PM and CO2 varied among plants. Plants with higher rates of photosynthesis were more effective in reducing PM and CO2 than those with lower rates. Among the four plant species, C. arabica and P. glabra were more effective in removing PM and CO2 than the other species. The chamber containing plants exhibited higher humidity and lower temperatures compared to the chamber without plants.Conclusion: These findings suggest that plants can play a significant role in improving indoor air quality. Not only do they effectively reduce levels of PM and CO2, but they also contribute to the regulation of indoor temperature and humidity. The implications of these results highlight the potential of integrating plants into indoor spaces as a natural and multifaceted solution for creating healthier and more comfortable environments.

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“…Green walls which occupy 1% of a rooms volume can reduce CO2 concentration [5]. Light intensity and the angle of light on a green wall are important factors in CO2 absorption efficiency [6]. Pérez-Urrestarazu et al [7] found that an active green wall can reduce the temperature in a hall by 0.8 to 2.3 °C at a measurement distance of 0.6 m. Al-Kayiem et.…”

Section: Introductionmentioning

confidence: 99%

Using Active Green Wall Systems for both Saving Energy and Improving Indoor Air Quality in Classrooms

Taemthong

Plitsiri²

2023

E3S Web of Conf.

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University classrooms in Thailand normally use air conditioners to enhance thermal comfort for building occupants. Classrooms with many students are often found to exceed standard concentration levels of carbon dioxide (CO2). This research aims to study the benefits of active green wall systems in two aspects. They are energy consumption and the ability to reduce CO2 of plants. The green walls in this research are divided into two systems, which are active green wall (AGW) and passive green wall (PGW). The experiments took place in an air-conditioned classroom with ten occupants. The room temperature was set at 25 °C for all experiments. The data collected for all experiments are CO2, temperature, and energy consumption. The results showed that two active green wall panels with a single plant of Epipremnum aureum is the optimal model for improving air quality in classrooms, when compared to other experiments. It can reduce the CO2 concentration by 35% and use less energy than the no green wall experiment at 26%.

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Analysis of lighting conditions of indoor living walls: Effects on CO2 removal

Cited by 13 publications

References 45 publications

Developing a digital workflow to estimate green walls’ performance for enhancing indoor air quality.

Developing a digital workflow to estimate green walls’ performance for enhancing indoor air quality.

Evaluating the Particulate Matter and Carbon Dioxide Reduction of Four Broad-leaved Evergreen Plants

Using Active Green Wall Systems for both Saving Energy and Improving Indoor Air Quality in Classrooms

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