New directions: Potential climate and productivity benefits from CO 2 capture in commercial buildings

Gall, Elliott T.; Nazaroff, William W.

doi:10.1016/j.atmosenv.2015.01.004

Cited by 23 publications

(19 citation statements)

References 20 publications

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“…Two of the few exceptions are Nazaroff who states that climate change will affect the concentrations of air pollutants in buildings which might have health and well-being implications, 3 and Gall and Nazaroff who suggest impact on productivity. 4 This paper systematically reviews studies that have tested the direct impact of elevated CO 2 concentrations on human cognition. The paper is in three parts.…”

Section: Introductionmentioning

confidence: 99%

Possible future impacts of elevated levels of atmospheric CO₂ on human cognitive performance and on the design and operation of ventilation systems in buildings

Lowe

Huebner

Oreszczyn

2018

Building Services Engineering Research and Technology

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This paper brings together a rapid evidence assessment of impacts of elevated CO 2 concentrations on human cognition with IPCC projections of atmospheric CO 2 concentration by the end of the present century, and an analysis of potential consequences of increased atmospheric CO 2 concentrations for ventilation systems in buildings and other enclosed spaces. Whilst only limited research has been done on the effect of CO 2 on cognition (as opposed to air quality in general), half of the studies reviewed indicate that human cognitive performance declines with increasing CO 2 concentrations. Hence, given the likelihood of increasing atmospheric CO 2 concentration by the end of the 21st century, direct impacts of anthropogenic CO 2 emissions on human cognitive performance may be unavoidable. Attempts to minimise these direct impacts are likely to result in significant indirect impacts on the engineering of ventilation systems and associated energy use in all enclosed spaces including buildings and transport systems. Practical application: This paper concerns what may well be one of the most important long-term drivers of the design, management, operation and regulation of ventilation systems over the remainder of the 21st century. It will be relevant to professionals, particularly at senior levels in the building industry.

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Section: Introductionmentioning

confidence: 99%

Possible future impacts of elevated levels of atmospheric CO₂ on human cognitive performance and on the design and operation of ventilation systems in buildings

Lowe

Huebner

Oreszczyn

2018

Building Services Engineering Research and Technology

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“…DCV based on CO 2 has been criticized because of variability in CO 2 emissions from people and too few sensors that average CO 2 of multiple zones . As an alternative, Gall and Nazaroff suggest that active CO 2 removal (eg, by sorption) from building air can allow for reduced ventilation, and thereby energy consumption, potentially reducing the U.S. building carbon footprint by 10 Tg CO 2 /y …”

Section: Introductionmentioning

confidence: 99%

Advanced buffer materials for indoor air CO₂control in commercial buildings

et al. 2017

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In this study, we evaluated solid sorbents for their ability to passively control indoor CO concentration in buildings or rooms with cyclic occupancy (eg, offices, bedrooms). Silica supported amines were identified as suitable candidates and systematically evaluated in the removal of CO from indoor air by equilibrium and dynamic techniques. In particular, sorbents with various amine loadings were synthesized using tetraethylenepentamine (TEPA), poly(ethyleneimine) (PEI) and a silane coupling agent 3-aminopropyltriethoxysilane (APS). TGA analysis indicates that TEPA impregnated silica not only displays a relatively high adsorption capacity when exposed to ppm level CO concentrations, but also is capable of desorbing the majority of CO by air flow (eg, by concentration gradient). In 10 L flow-through chamber experiments, TEPA-based sorbents reduced outlet CO by up to 5% at 50% RH and up to 93% of CO adsorbed over 8 hours was desorbed within 16 hours. In 8 m flow-through chamber experiments, 18 g of the sorbent powder spread over a 2 m area removed approximately 8% of CO injected. By extrapolating these results to real buildings, we estimate that meaningful reductions in the CO can be achieved, which may help reduce energy requirements for ventilation and/or improve air quality.

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“…Such combined investigations are warranted given the available evidence that lower temperatures can improve work performance [33], and that temperature, ventilation mode, and air-exchange rate are likely to be interdependent. If cognitive consequences of excessive CO2 exposure are further substantiated, opportunities for capture and/or sequestration of CO2 in buildings, with dual-benefits for building sustainability and indoor environmental quality may become warranted to develop [34]. Several research efforts describe the application of CO2 capture technologies to indoor environments [35,36].…”

Section: Study Limitations and Implicationsmentioning

confidence: 99%

Real-time monitoring of personal exposures to carbon dioxide

Gall

Cheung

Luhung

et al. 2016

Building and Environment

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Elevated indoor CO2 levels are indicative of insufficient ventilation in occupied spaces and correlate with elevated concentrations of pollutants of indoor origin. Adverse health and wellbeing outcomes associated with elevated indoor CO2 levels are based on CO2 as a proxy, although some emerging evidence suggests CO2 itself may impact human cognition. Using portable monitors, we conducted an exposure study with 16 subjects in Singapore to understand the levels, dynamics and influencing factors of personal exposure to CO2. Participants carried a CO2 monitor continuously for 7-day periods recording their exposure levels at 1-min intervals. A recall diary was maintained of time-microenvironment-activity budget. We found that the mode of bedroom ventilation was a major determinant of CO2 exposure. Approximately half of the participants slept in bedrooms employing ductless split air-conditioners (group "AC"); half slept in bedrooms naturally ventilated through operable windows (group "NV"). Median CO2 exposure levels for AC vs. NV groups are significantly different (̃ = 650 ppm vs. ̃ = 550 ppm, p < 0.001). Mean daily integrated exposures for group AC were statistically higher than for group NV: 22,800 ppm h/d vs. 16,000 ppm h/d (p < 0.005). Exposure events associated with potential adverse cognitive implications (duration > 2.5 h, average CO2 mixing ratio > 1000 ppm) occurred, on average, at frequencies of 0.5 d -1 across all participants, 0.6 d -1 for AC participants and 0.2 d -1 for NV participants. The majority of such events occurred in the home (86%), followed by work (9%) and transit (3%).

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New directions: Potential climate and productivity benefits from CO 2 capture in commercial buildings

Cited by 23 publications

References 20 publications

Possible future impacts of elevated levels of atmospheric CO₂ on human cognitive performance and on the design and operation of ventilation systems in buildings

Possible future impacts of elevated levels of atmospheric CO₂ on human cognitive performance and on the design and operation of ventilation systems in buildings

Advanced buffer materials for indoor air CO₂control in commercial buildings

Real-time monitoring of personal exposures to carbon dioxide

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New directions: Potential climate and productivity benefits from CO 2 capture in commercial buildings

Cited by 23 publications

References 20 publications

Possible future impacts of elevated levels of atmospheric CO2 on human cognitive performance and on the design and operation of ventilation systems in buildings

Possible future impacts of elevated levels of atmospheric CO2 on human cognitive performance and on the design and operation of ventilation systems in buildings

Advanced buffer materials for indoor air CO2control in commercial buildings

Real-time monitoring of personal exposures to carbon dioxide

Contact Info

Product

Resources

About

Possible future impacts of elevated levels of atmospheric CO₂ on human cognitive performance and on the design and operation of ventilation systems in buildings

Possible future impacts of elevated levels of atmospheric CO₂ on human cognitive performance and on the design and operation of ventilation systems in buildings

Advanced buffer materials for indoor air CO₂control in commercial buildings