The Experts below are selected from a list of 12327 Experts worldwide ranked by ideXlab platform
Pawel Wargocki - One of the best experts on this subject based on the ideXlab platform.
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The effect of Reducing Pollution sources and photocatalytic air purifier quantified with proton-transfer-reaction mass spectrometry
Indoor Air 2005: Proceedings of the 10th International Conference on Indoor Air Quality and Climate Vols 1-5, 2005Co-Authors: A Skorek, Pawel Wargocki, Armin Wisthaler, B FamulaAbstract:Proton-Transfer-Reaction Mass Spectrometry (PTR-MS) was used to measure volatile organic compounds (VOCs) in an office in which common Pollution sources were present or absent and a photocatalytic air purifier was in operation or turned off Outdoor air supply rate was 0.6 h(-1) (18 L/s), air temperature was 22 degrees C and relative humidity was 40%. PTR-MS showed that the concentration of many air pollutants was reduced when the air purifier was in operation or the Pollution sources were removed. The on-line measurements made it possible to observe how quickly each of the interventions had an effect on the concentration of air pollutants in the office. Present results suggest that PTR-MS can provide useful supplementary information in indoor climate investigations on real-time changes in composition and concentration of a wide range of indoor air organic pollutants.
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air quality in a simulated office environment as a result of Reducing Pollution sources and increasing ventilation
Energy and Buildings, 2002Co-Authors: Pawel Wargocki, Zsolt Bakobiro, Geo Clausen, Ole P FangerAbstract:Abstract Air quality was studied in an office space classified as low-polluting and ventilated with outdoor air at a rate of 1 h−1. The Pollution load in the space was changed by introducing or removing common building-related indoor Pollution sources (linoleum, sealant and wooden shelves with books and paper documents) so that the space could no longer be classified as low-polluting. The outdoor air supply rate in the office was altered from 1 to 3 h−1 (0.83 and 2.5 l/s per m2 floor, respectively) when sources were present and absent. Air temperature of 23 °C, relative humidity of 50% and noise level of 35 dB(A) remained unchanged. Under each of the four conditions of air quality in the office, concentrations of volatile organic compounds (VOCs) were measured and perceived air quality was assessed by a panel of 30 female subjects. Removing the sources reduced the chemical and sensory Pollution load in the office, and increasing the outdoor air supply rate decreased concentrations of many VOCs, including those emitted by building materials and furnishing, and human bioeffluents. The perceived air quality in the office was consequently improved. The improvement in air quality obtained by removing the sources was similar to that obtained by increasing the outdoor air supply rate. The study, thus, confirmed that the systematic use of low-polluting building materials will lead to improved air quality.
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Improving Indoor Air Quality Improves the
International Centre for Indoor Environment and Energy Department of Civil Engineering Technical University of Denmark Kgs. Lyngby Denmark, 2002Co-Authors: Pawel WargockiAbstract:Recent studies show that improving indoor air quality (IAQ) from the mediocre level prevalent in many buildings worldwide improves the performance of office work by adults and the performance of schoolwork by children. These results constitute a strong incentive for providing indoor air of a quality that is better than the minimum levels required by present standards. IAQ can be improved by Reducing the Pollution load on the air by selecting low-polluting building and furnishing materials and electronic office equipment, as well as Reducing Pollution in ventilation systems, and/or by increasing the outdoor air supply rate. Although these measures can increase somewhat the costs of running the buildings, especially as regards energy costs, they are highly cost-effective and their implementation has a short pay-back time if the benefits from increased productivity are included in calculations. This is because the economic benefits from improved productivity exceed considerably the costs involved. New intelligent design of the building envelope and the ventilation systems with careful selection of building and furnishing materials, and the use of advanced methods for cleaning the air can further reduce the costs of providing high IAQ in future buildings. This will not only improve productivity and learning, but will in addition promote health and comfort.
Ole P Fanger - One of the best experts on this subject based on the ideXlab platform.
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air quality in a simulated office environment as a result of Reducing Pollution sources and increasing ventilation
Energy and Buildings, 2002Co-Authors: Pawel Wargocki, Zsolt Bakobiro, Geo Clausen, Ole P FangerAbstract:Abstract Air quality was studied in an office space classified as low-polluting and ventilated with outdoor air at a rate of 1 h−1. The Pollution load in the space was changed by introducing or removing common building-related indoor Pollution sources (linoleum, sealant and wooden shelves with books and paper documents) so that the space could no longer be classified as low-polluting. The outdoor air supply rate in the office was altered from 1 to 3 h−1 (0.83 and 2.5 l/s per m2 floor, respectively) when sources were present and absent. Air temperature of 23 °C, relative humidity of 50% and noise level of 35 dB(A) remained unchanged. Under each of the four conditions of air quality in the office, concentrations of volatile organic compounds (VOCs) were measured and perceived air quality was assessed by a panel of 30 female subjects. Removing the sources reduced the chemical and sensory Pollution load in the office, and increasing the outdoor air supply rate decreased concentrations of many VOCs, including those emitted by building materials and furnishing, and human bioeffluents. The perceived air quality in the office was consequently improved. The improvement in air quality obtained by removing the sources was similar to that obtained by increasing the outdoor air supply rate. The study, thus, confirmed that the systematic use of low-polluting building materials will lead to improved air quality.
H. Deng - One of the best experts on this subject based on the ideXlab platform.
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The history and current applications of the circular economy concept
Renewable and Sustainable Energy Reviews, 2017Co-Authors: Kiara Winans, Alissa Kendall, H. DengAbstract:The challenges of balancing industrial development, environmental and human health, and economic growth in China and elsewhere in the world are drivers for recent resource use and low-carbon development strategies that include the application of the circular economy (CE) concept. A central theme of the CE concept is the valuation of materials within a closed-looped system with the aim to allow for natural resource use while Reducing Pollution or avoiding resource constraints and sustaining economic growth. The objectives of this study are (1) to review the history of the CE concept to provide a context for (2) a critical examination of how it is applied currently. Thematic categories are used to organize the literature review results including policy instruments and approaches; value chains, material flows, and products; and technology, organizational, and social innovation. The literature review illustrates the variability in CE project success and failure over time and by region. CE successes, key challenges, and research gaps are identified. The literature review results provide useful information for researchers as well as multi-stakeholder groups who seek to define the CE concept in practical terms, and to consider potential challenges and opportunities it presents when implemented.
Kiara Winans - One of the best experts on this subject based on the ideXlab platform.
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The history and current applications of the circular economy concept
Renewable and Sustainable Energy Reviews, 2017Co-Authors: Kiara Winans, Alissa Kendall, H. DengAbstract:The challenges of balancing industrial development, environmental and human health, and economic growth in China and elsewhere in the world are drivers for recent resource use and low-carbon development strategies that include the application of the circular economy (CE) concept. A central theme of the CE concept is the valuation of materials within a closed-looped system with the aim to allow for natural resource use while Reducing Pollution or avoiding resource constraints and sustaining economic growth. The objectives of this study are (1) to review the history of the CE concept to provide a context for (2) a critical examination of how it is applied currently. Thematic categories are used to organize the literature review results including policy instruments and approaches; value chains, material flows, and products; and technology, organizational, and social innovation. The literature review illustrates the variability in CE project success and failure over time and by region. CE successes, key challenges, and research gaps are identified. The literature review results provide useful information for researchers as well as multi-stakeholder groups who seek to define the CE concept in practical terms, and to consider potential challenges and opportunities it presents when implemented.
Amit Garg - One of the best experts on this subject based on the ideXlab platform.
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Impact of current policies on future air quality and health outcomes in Delhi, India
Atmospheric Environment, 2013Co-Authors: Hem H. Dholakia, Pallav Purohit, Shilpa Rao, Amit GargAbstract:A key policy challenge in Indian megacities is to curb high concentrations of PM2.5and mitigate associated adverse health impacts. Using the Greenhouse Gases and Air Pollution Interactions and Synergies (GAINS) model we carry out an integrated analysis of the air quality regulations across different sectors for the city of Delhi. Our findings show that PM2.5concentrations for Delhi will not reach the recommended national ambient air quality standards (NAAQS) even by 2030 under the current policies scenario. Adopting advanced control technologies reduces PM2.5concentrations by about 60% and all-cause mortality by half in 2030. Climate change mitigation policies significantly reduce greenhouse gases, but have a modest impact on Reducing PM2.5concentrations. Stringent policies to control the net flow of air Pollution from trans-boundary sources will play a crucial role in Reducing Pollution levels in Delhi city. Achieving NAAQS requires a stringent policy portfolio that combines advanced control technologies with a switch to cleaner fuels and the control of trans-boundary Pollution. © 2013 Elsevier Ltd.
