air analysis Articles

  • Indoor Air Analysis - Zigbee

    PPM Technolgy"s new IAQ profile monitor featured as part of the Telegesis ZigBee case ...


    By PPM Technology

  • Study on the effect of preference of air–conditioning usage on the exergy consumption pattern within a built environment

    According to previous work, preference is one major factor influencing occupants' behaviour. This paper aims at identifying the magnitude preference on the exergy consumption pattern within a built environment. The comparison is made between one group claiming to like sleeping in air–conditioned spaces and the other claiming to dislike it. In conclusion, the exergy analysis showed that at the ...


    By Inderscience Publishers

  • Environmental Applications Performed Using Equity Capillary GC columns

    Various Environmental Applications performed on the Supelco® Equity line of capillary GC columns; specifically the 100% poly(dimethylsiloxane) and poly(5% diphenyl.95% dimethylpolysiloxane) phases.  Applications include the following; USEPA Method 8270 for semivolatile compounds; USEPA Method 8081 for chlorinated pesticides; USEPA Method 8082 for polychlorinated biphenyls; diesel fuel; ...


    By MilliporeSigma

  • A simple and fast micromethod for the analysis of polychlorinated biphenyls in air by sorbent enrichment and ultrasound-assisted solvent extraction

    Abstract  A combination of sorbent enrichment and ultrasound-assisted solvent extraction has been used to determine polychlorinated biphenyls in air. Analytes were sampled by pumping a known volume of air through a porous polymer (Tenax TA). The enriched adsorbent was transferred into a glass vial, and ultrasound-assisted extraction of the analytes was then performed in ...


    By Springer-Verlag GmbH

  • Gravity influence on the exergy balance

    New component of 'mechanical exergy' of substance, proposed earlier by Petela, is based on the difference of densities of the substance and the atmosphere. Application of this component does not fulfil the traditional exergy balance equation. Thus, additional equation term, called 'gravity input', is proposed here. The term, expresses the effect of gravity field on the considered process and is ...


    By Inderscience Publishers

  • External losses in high-bypass turbo fan air engines

    The external irreversible losses of air engines, due to equilibration of the hot and fast exhaust with the environment, are discussed based on the second law of thermodynamics. The effect of the bypass ratio on thermomechanical exergy destruction in the exhaust stream is demonstrated. The analysis gives a strong motivation for the use of high bypass turbo fan engines in modern aircraft.Keywords: ...


    By Inderscience Publishers

  • Experimental study on an open cycle desiccant cooling system

    This paper presents the design and construction of an experimental desiccant cooling system that uses natural zeolite as the desiccant. This is the first use of this desiccant in an actual or experimental system. The primary system components are originally designed and constructed. The paper provides a sufficient detail on the design procedure of the components as well as the methods of ...


    By Inderscience Publishers

  • Industrial applications – Air analysis in clean air room - Case study

    Context & Challenges To ensure people’s safety and a good repeatability of industrial process, the analysis of ambient air is crucial. Especially, electronic boards are produced in clean air room by complex lithographic process using very reactive chemicals. The nature and concentration of volatile compounds can be different depending on the chemical process and can also vary ...


    By Chromatotec Group

  • Some economic aspects of climate change

    In recent years, increasing attention has been given to economic analyses of a variety of aspects of climate change. By discussing the consequences of climate change, damage estimates for a doubling of atmospheric carbon dioxide concentration, and strategies for responding to climate change, this paper attempts to keep audiences both within and outside the economics profession informed of the ...


    By Inderscience Publishers

  • Measuring intermodalism at European port cities: an employment-based study

    Since many studies on intermodalism face a lack of empirical evidence and comparative research, this paper focuses on the modal distribution of employment among 76 European port cities. Data is collected from 9,000 companies and more than one million employees involved in port, sea, air, road, rail, warehousing, forwarding, and logistics, together with population, port, and air traffics. Results ...


    By Inderscience Publishers

  • Transport and the environment in Finnish research and policy-making

    The objectives on reducing overall emissions are a special challenge for Finland, because its energy consumption per GNP is higher than in the majority of industrialised countries. In the 1990s, Finnish infrastructure decisions were subject to major disputes and a related major action programme, LYYLI, was launched. The reports in the field of transport and environment in Finland can be ...


    By Inderscience Publishers

  • Second law analysis of compressible flow through a diffuser subjected to constant wall temperature

    This study presents the investigation of entropy generation in compressible turbulent flow of air through a diffuser. Constant temperature boundary condition is applied at the wall. Two-dimensional solution of velocity and temperature fields are obtained using the CFD code FLUENT. Regions of high entropy generation in the diffuser have been predicted. The desired inlet expansion angle ...


    By Inderscience Publishers

  • Sensitivity analysis of indoor air exergy with environment reference state in China

    This paper analyses the exergy of air in the building affected by the reference state, considering parameters of temperature and humidity of air. Taking TMY data of 25 typical cities in different building thermal climate zones of China and considering the chemical and physical exergy of air, the exergy of air in the building influenced by the dynamic and static reference state is comparatively ...


    By Inderscience Publishers

  • Annual runoff change in the headstream of Yangtze River and its relation to precipitation and air temperature

    We analyse the change trends of the annual and seasonal runoff series of the hydrological station Batang on the headstream of the Yangtze River over the period 1960–2007. The relations between runoff series and precipitation and temperature conditions are investigated, and the influence of the refreezing process of meltwater of the glaciers on the Yangtze River flow is examined with the ...


    By IWA Publishing

  • Gas Chromatography: MCERTS Certification for Ambient Air Analysis on Benzene and VOCs

    Due to environmental issues, the world of gas analysis is evolving very rapidly. Governments set the rules to limit and control the environmental pollution through legislation. Volatile organic compounds (VOCs), often produced by human activities, are amongst the sources of pollution that need to be identified and quantified for safety reasons. Exposure to high concentrations of certain VOCs is ...


    By Chromatotec Group

  • Air quality in Europe — 2016 report

    This report presents an updated overview and analysis of air quality in Europe. It is focused in the state in 2015 and the development from 2004 to 2015. It reviews progress towards meeting the requirements of the air quality directives. An overview of the latest findings and estimates of the effects of air pollution on health and its impacts on ecosystems is also ...

  • Comparison of objective air-mass types and the Peczely weather types and their ability to classify levels of air pollutants in Szeged, Hungary

    This paper compares the efficiency of a system of objective air-mass types and the Peczely's weather types in classifying pollution levels over the Carpathian Basin for the winter and summer months. Based on the ECMWF data set, daily sea-level pressure fields analysed at 00 UTC were related to the levels of air pollutants for both the objective air-mass types and the Peczely-types in Szeged. The ...


    By Inderscience Publishers

  • Gas Chromatography: MCERTS Certification for Ambient Air Analysis on Benzene and VOCs

    Due to environmental issues, the world of gas analysis is evolving very rapidly.Governments set the rules to limit and control the environmental pollution through legislation.Volatile organic compounds (VOCs),often produced by human activities, are amongst the sources of pollution that need to be identified and quantified for safety reasons. Exposure to high concentrations of certain VOCs is ...


    By Chromatotec Group

  • An efficiency study of airlines and air cargo/passenger divisions: a DEA approach

    In this paper we investigate the question of whether a high degree of cargo business improves the operational efficiency of a mixed passenger/cargo airline. We use Data Envelopment Analysis (DEA) to compute the efficiency scores for major airlines in the world and then carry out non-parametric statistical tests. Using data for 29 airlines during the period 1998-2002, we find that airlines with a ...


    By Inderscience Publishers

  • Industrial Applications – Air Analysis i n Clean Air Room - Case Study

    Context & Challenges To ensure people’s safety and a good repeatability of industrial process, the analysis of ambient air is crucial. Especially, electronic boards are produced in clean air room by complex lithographic process using very reactive chemicals. The nature and concentration of volatile compounds can be different depending on the chemical process and can also vary ...


    By Chromatotec Group

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