A novel ventilation strategy with CO2 capture device and energy saving in buildings

Kim, Moon Keun; Baldini, Luca; Leibundgut, Hansjürg; Wurzbacher, Jan Andre; Piatkowski, Nic

doi:10.1016/j.enbuild.2014.11.017

Cited by 49 publications

(18 citation statements)

References 16 publications

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“…Practical technologies have been developed for the removal of CO 2 from enclosed spaces such as submarines and spacecrafts for life support . Removal of CO 2 from buildings to improve air quality and considerably reduce air conditioning costs has also emerged as a possible application of DAC . High levels of CO 2 can lead to a number of problems in enclosed spaces.…”

Section: Resultsmentioning

confidence: 99%

“…[41,71] Removal of CO 2 from buildings to improve air quality and considerably reduce air conditioning costs has also emerged as ap ossible application of DAC. [72] High levels of CO 2 can lead to an umber of problems in enclosed spaces.L evels of 1000-2000 ppm are associated with complaints of drowsiness and poor air. [73] Allen et al found that cognitive functions of office workers were significantly reduced by levels of CO 2 in the range of 900-1500 ppm;aconcentration regularly encountered in office buildings.…”

Section: Co 2 Removal From Enclosed Spacesmentioning

confidence: 99%

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Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO₂ Capture from Various Sources Including Air

et al. 2019

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CO2 adsorbents based on the reaction of pentaethylenehexamine (PEHA) or tetraethylenepentamine (TEPA) with propylene oxide (PO) were easily prepared in “one pot” by impregnation on a silica support in water. The starting materials were readily available and inexpensive, facilitating the production of the adsorbents on a large scale. The prepared polyamine/epoxide adsorbents were efficient in capturing CO2 and could be regenerated under mild conditions (50–85 °C). They displayed a much‐improved stability compared with their unmodified amine counterparts, especially under oxidative conditions. Leaching of the active organic amine became minimal or nonexistent after treatment with the epoxide. The adsorption as well as desorption kinetics were also greatly improved. The polyamine/epoxide adsorbents were able to capture CO2 from various sources including ambient air and indoor air with CO2 concentrations of only 400–1000 ppm. The presence of water, far from being detrimental, increased the adsorption capacity. Their use for indoor air quality purposes was explored.

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Section: Resultsmentioning

confidence: 99%

Section: Co 2 Removal From Enclosed Spacesmentioning

confidence: 99%

Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO₂ Capture from Various Sources Including Air

et al. 2019

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“…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]. Solid sorbents are beginning to be integrated into HVAC systems to remove CO2 from recirculation air in commercial buildings [37].…”

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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“…It can be accomplished on various ways depending whether the building is mechanically or naturally ventilated. The issues of indoor air quality and carbon dioxide as an indicator of ventilation efficiency in mechanically ventilated buildings are described in the literature [1][2][3]. However there is still huge number of existing naturally ventilated buildings were human is a main source of contaminants and where CO2 as the sufficient indicator can be used for optimisation of indoor conditions.…”

Section: Introductionmentioning

confidence: 99%

“…As people spend most of their time indoors, IAQ has been identified as a crucial aspect of building utilization in many publication [1,[3][4][5][6]. The CO2 concertation is described by the quantity of carbon dioxide in a million particles of air -ppm (particle per million).…”

Section: Introductionmentioning

confidence: 99%

Research of CO₂concentration in naturally ventilated lecture room

Laska

Dudkiewicz

2017

E3S Web Conf.

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Abstract. Naturally ventilated buildings especially dedicated for educational purposes need to be design to achieve required level of thermal comfort and indoor air quality. It is crucial in terms of both: health and productivity of the room users. Higher requirements of indoor environment are important due to the level of students concentration, their ability to acquire new knowledge and willingness to interact with the lecturer. The article presents the results of experimental study and surveys undertaken in naturally ventilated lecture room. The data is analysed in terms of CO2 concentration and its possible influence on users. Furthermore the outcome of the research is compared with the CO2 concentration models available in the literature.

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A novel ventilation strategy with CO2 capture device and energy saving in buildings

Cited by 49 publications

References 16 publications

Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO₂ Capture from Various Sources Including Air

Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO₂ Capture from Various Sources Including Air

Real-time monitoring of personal exposures to carbon dioxide

Research of CO₂concentration in naturally ventilated lecture room

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A novel ventilation strategy with CO2 capture device and energy saving in buildings

Cited by 49 publications

References 16 publications

Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO2 Capture from Various Sources Including Air

Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO2 Capture from Various Sources Including Air

Real-time monitoring of personal exposures to carbon dioxide

Research of CO2concentration in naturally ventilated lecture room

Contact Info

Product

Resources

About

Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO₂ Capture from Various Sources Including Air

Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO₂ Capture from Various Sources Including Air

Research of CO₂concentration in naturally ventilated lecture room