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Relevant bibliographies by topics / Chlorofluorocarbons

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Academic literature on the topic 'Chlorofluorocarbons'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 July 2024

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Journal articles on the topic "Chlorofluorocarbons"

1

Michael O Jonas. "The ozone hole and a phase change in lower stratospheric temperature." World Journal of Advanced Research and Reviews 21, no. 2 (February 28, 2024): 1319–13. http://dx.doi.org/10.30574/wjarr.2024.21.2.0531.

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Depletion of ozone over Antarctica was first observed in the late 1970s, and discovery of the Antarctic ozone hole was announced in the 1980s as having started in 1979. The ozone hole was defined as the area with total column ozone less than 220 Dobson units. Analysis of ozone, temperature, chlorofluorocarbon and nitrous oxide data from 1963 onwards suggests that the annual ozone minimum at the South Pole is related to lower stratospheric temperature independently of chlorofluorocarbons and nitrous oxide. There were ozone holes, ie. column ozone less than 220 Dobson Units, at the South Pole in several years before 1979 (the date that the ozone hole is reported to have first appeared) when chlorofluorocarbon concentrations were much lower than today and lower than in 1979. An early 1980s phase change in the lower stratospheric temperature at the South Pole at altitudes between 250 hPa and 100 hPa, and at some lower altitudes, coincides with a phase change in the annual South Pole ozone minimum. The phase change is not visible in chlorofluorocarbon or nitrous oxide data. This raises the possibility that, over a multi-annual or decadal timescale, lower stratospheric temperature has more effect than chlorofluorocarbons or nitrous oxide on atmospheric ozone concentration over the South Pole. Alternatively, temperature and ozone may both be reacting to some other influence.

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Kawasaki, Naohito, Seiki Tanada, Takeo Nakamura, and Ikuo Abe. "The Recovery of Chlorofluorocarbons and Chlorofluorocarbon Replacements by Surface Modified Activated Carbon." Journal of Colloid and Interface Science 172, no. 2 (June 1995): 368–73. http://dx.doi.org/10.1006/jcis.1995.1266.

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Maltagliati, Luca. "Chlorofluorocarbons detection perspectives." Nature Astronomy 6, no. 3 (March 2022): 294. http://dx.doi.org/10.1038/s41550-022-01646-7.

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McFarland, Mack, and Jack Kaye. "CHLOROFLUOROCARBONS AND OZONE." Photochemistry and Photobiology 55, no. 6 (June 1992): 911–29. http://dx.doi.org/10.1111/j.1751-1097.1992.tb08540.x.

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Anderson, Philip O. "Chlorofluorocarbons in medicinals." American Journal of Health-System Pharmacy 47, no. 6 (June 1, 1990): 1382–98. http://dx.doi.org/10.1093/ajhp/47.6.1382.

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McFarland, Mack. "Chlorofluorocarbons and ozone." Environmental Science & Technology 23, no. 10 (October 1989): 1203–7. http://dx.doi.org/10.1021/es00068a004.

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Ellmers, S. "Alternatives to chlorofluorocarbons." BMJ 298, no. 6680 (April 22, 1989): 1100–1101. http://dx.doi.org/10.1136/bmj.298.6680.1100-c.

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Boyes, A. "Alternatives to chlorofluorocarbons." BMJ 298, no. 6686 (June 3, 1989): 1521. http://dx.doi.org/10.1136/bmj.298.6686.1521-c.

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Plotkin, S. "Clinical comparison of preinjection anesthetics." Journal of the American Podiatric Medical Association 88, no. 2 (February 1, 1998): 73–79. http://dx.doi.org/10.7547/87507315-88-2-73.

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To minimize injection anxiety and discomfort, the podiatric surgeon can choose from a variety of topical anesthetics. Available modalities include skin refrigerants (also referred to as vapocoolants), needleless injection systems, iontophoresis, and eutectic mixtures of topical anesthetic cream such as EMLA Cream. Many of the vapocoolants contain chlorofluorocarbons, which are known to damage the ozone layer, a stratospheric layer that filters out harmful ultraviolet B radiation. In accordance with the 1992 Montreal Protocol, which banned the manufacture of certain chlorofluorocarbon compounds, many commonly used vapocoolants will no longer be available. Some newly marketed vapocoolants produce extremely cold temperatures, limiting their use. This article discusses the properties of various vapocoolants and other topical anesthetics and compares their effectiveness in patient trials.

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Elliot, Scott, and F. S. Rowland. "Chlorofluorocarbons and stratospheric ozone." Journal of Chemical Education 64, no. 5 (May 1987): 387. http://dx.doi.org/10.1021/ed064p387.

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Dissertations / Theses on the topic "Chlorofluorocarbons"

1

Bateman, Alison Sian. "Chlorofluorocarbons in groundwater." Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285224.

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Berrey, Christopher Lee. "Catalytic reactions involving chlorofluorocarbons : a review /." Master's thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-10242009-020132/.

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Jeansson, Emil. "Chemical tracers in the Nordic Seas : studies on water masses and anthropogenic carbon /." Göteborg : Göteborg University, Department of Chemistry, 2005. http://www.loc.gov/catdir/toc/fy0801/2006421403.html.

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Dalamagas, Demetra G. "The effects of varying concentration and duration of CFC-113 exposure on end-exhaled breath CFC-113 concentration." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=411.

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Thesis (M.S.)--West Virginia University, 1999.
Title from document title page. Document formatted into pages; contains viii, 105 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 68-69).

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Frantzen, Michelle E. Gunn. "Abatement of perfluorocompounds and chlorofluorocarbons using surface wave plasma technology." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4734.

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Application of surface wave plasma technology for effective abatement of environmentally harmful gases such as perfluorocompounds and chlorofluorocarbons is investigated. Perfluorocompounds (PFCs) are gases that contribute to forced global warming and have been favored for wafer etch and chamber clean applications in the semiconductor industry. Chlorofluorocarbons (CFCs) are ozone depleting gases that were used as refrigerants for commercial and domestic condensers and air conditioners, but current reserves still pose threats to environmental sustainability. Increased average global temperatures and further destruction of the ozone layer have prompted proposal of international initiatives such as the Montreal Protocols and the Kyoto Agreement to curtail emissions of such fugitive gases into the environment. These have increased the need for effective abatement technologies to control such emissions and include surface wave plasma abatement, the subject of this dissertation. Surface wave plasmas are considered high frequency non-equilibrium traveling wave discharges in contrast to the more frequently used standing wave discharges. The use of surface wave plasmas have the advantages of a variety of discharge vessel shapes, reproducibility of application, numerous operating conditions and large plasma volumes which ultimately produce low, molecular weight byproducts that are associated with high effective electron temperatures but low heavy particle temperatures. For these reasons, surface wave plasma abatement technology was developed for the destruction and removal of PFCs and CFCs. Results include final destruction and removal efficiencies (DREs) for octafluorocyclobutane greater than 99.8%, dichlorodifluoromethane greater than 99.995% and trichlorofluoromethane greater than 99.999% using moderate applied microwave powers of less than 2000 watts with the production of low molecular weight byproducts, such as CO2, CO, HF and HCl, that prevent environmentally harmful process emissions from entering the atmosphere. Characterizations of the initial and final products were accomplished by the use of Fourier transform infrared spectroscopy and quadrupole mass spectrometry to provide independent quantitative analyses of plasma processes. In addition to these analytical methods, Global_Kin a kinetic model, of plasma reactions were conducted and compared to all the experimental data determined in order to facilitate understanding of the chemistry involved in the surface wave plasma abatement applications studied. Basic plasma reaction mechanisms were determined for the abatement of octafluorocyclobutane and dichlorodifluoromethane.

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Conqueror, Martin Robert. "Reactions of silicon intermediates relevant to the dechlorination of chlorofluorocarbons." Thesis, University of Leicester, 1994. http://hdl.handle.net/2381/34058.

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The threat to the Earth's ozone layer posed by chlorofluorocarbons (CFCs) arises because of the photolytic generation of chlorine atoms in the stratosphere. New methods of rendering CFCs less harmful by dechlorinating them, are therefore of environmental importance. Preliminary investigations have suggested that silylene chemistry may be useful in this respect. Silylenes have also been shown to be formed as gas-phase intermediates during the Direct Synthesis of methylchlorosilanes. This work reports on a study of the possibility of using these silylenes for the dechlorination of CFCs using the technology of the Direct Synthesis, and the effect that CFCs would have upon methylchlorosilane product distribution. The gas-phase reactions of silylenes with chlorofluorocarbons were studied. Silylenes (:SiMe2, :SiMeCl and :SiCl2), were generated thermally from appropriate disilane precursors in the presence of halomethanes (CF2Cl2 and CFCl3). The reactions proceeded via radical mechanisms, initiated by the decomposition of an adduct formed between the CFC and silylene, resulting in chlorine abstraction to yield chlorosilyl and halomethyl radicals. Abstraction proceeded most efficiently with :SiMe2. The mechanisms were propagated by the resultant halomethyl radicals which acted as chain carriers. Although silylene insertion reactions were observed, radical reactions were dominant. The reactions of silylenes with methyl chloride were also studied but were found to be less extensive, with die greater strength of the C-Cl bond allowing insertion reactions to become competitive. All reactions were found to proceed much more efficiently in the presence of a relatively weak Si-H bond. To understand further the role of radical reactions in the dehalogenation of CFCs, silyl radicals were generated directly using mercury photosensitisation. Similar mechanisms were indicated, although reaction was more extensive as a result of the increased number of gas-phase radical species. A laboratory scale reactor was used to simulate the addition of CFCs to the Direct Synthesis, and to study their effect on product distribution. Surface reactions dominated, with the adsorption of CFCs leading to greater chlorination of the methylchlorosilane products.

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Lee, Julia Margaret. "Determination of stratospheric lifetimes of HCFCs and other halogenated hydrocarbons from balloon-borne profile measurements." Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238852.

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Zhang, Hongxia. "Study of the effect of gold, platinum and vanadium oxide additives on the activity of TiO₂-ZrO₂ mixed oxide for the decomposition of CFC-22." HKBU Institutional Repository, 2002. http://repository.hkbu.edu.hk/etd_ra/367.

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Beegle, Cynthia Juyne. "Modelling the chlorofluorocarbon transient in the north Pacific : comparison with observations and model dynamics /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/11059.

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Hu, Chengjiu. "Investigation of factors influencing the development of pressurized metered dose inhalers /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Books on the topic "Chlorofluorocarbons"

1

D, Beritic-Stahuljak, Millischer R, Valic F, International Program on Chemical Safety., United Nations Environment Programme, and World Health Organization, eds. Partially halogenated chlorofluorocarbons (ethane derivatives). Geneva: World Health Organization, 1992.

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2

Chartered Institution of Building Services Engineers. Chlorofluorocarbons: Professional and practical guidance. London: TheChartered Institution of Building Services Engineers, 1989.

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D, Beritić-Stahuljak, Valic F, World Health Organization, and United Nations Environment Programme, eds. Partially halogenated chlorofluorocarbons (methane derivatives). Geneva: World Health Organization, 1991.

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4

L, Wevill Sharon, ed. Alternative formulations and packaging to reduce use of chlorofluorocarbons (CFCs). Park Ridge, N.J., U.S.A: Noyes Data Corp., 1990.

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5

Kollig, Heinz P. Fate constants for some chlorofluorocarbon substitutes. Athens, GA: U.S. Environmental Protection Agency, Environmental Research Laboratory, 1991.

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6

Curwell, S. R. Use of CFCS in buildings. London: Fernsheer, 1988.

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United States. Dept. of Energy. Office of Program Analysis, ed. Energy efficient alternatives to chlorofluorocarbons (CFCs): A research needs assessment : final report. Washington, DC: U.S. Dept. of Energy, 1993.

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8

Shin Enerugī Sangyō Gijutsu Sōgō Kaihatsu Kikō (Japan). Technology development to reduce the emission of fluorinated gases in response to the goals of Japan's Kyoto protocol target achievement plan. 6th ed. Kawasaki, Japan: New Energy and Industrial Technology Development Organization, 2009.

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9

Ahmed, Kulsum. Technological development and pollution abatement: A study of how enterprises are finding alternatives to chlorofluorocarbons. Washington, D.C: World Bank, 1995.

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10

Australia. Dept. of the Parliamentary Library. Legislative Research Service. Chlorofluorocarbons--do they affect the stratospheric ozone? [Canberra]: Dept. of the Parliamentary Library, 1987.

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Book chapters on the topic "Chlorofluorocarbons"

1

Plummer, L. Niel, and Eurybiades Busenberg. "Chlorofluorocarbons." In Environmental Tracers in Subsurface Hydrology, 441–78. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4557-6_15.

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Elliott, Arthur J. "Chlorofluorocarbons." In Organofluorine Chemistry, 145–57. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1202-2_6.

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Rao, V. N. M. "Alternatives to Chlorofluorocarbons (CFCs)." In Organofluorine Chemistry, 159–75. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1202-2_7.

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Yamabe, Masaaki. "The Importance of Chemical Substitutes to Chlorofluorocarbons (CFCs)." In Twenty Years of Ozone Decline, 429–37. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2469-5_32.

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Ribeiro, Fabio H., and Gabor A. Somorjai. "Kinetics for the Hydrodechlorination of Chlorofluorocarbons over Model Palladium Catalysts." In ACS Symposium Series, 192–204. Washington, DC: American Chemical Society, 2000. http://dx.doi.org/10.1021/bk-2001-0766.ch015.

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Sam, C. T., and T. H. Chua. "The Determination of Chlorofluorocarbons and Extractives in the Expanded and Disposable Polystyrene Ware." In Fourth Symposium on our Environment, 413–22. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-2664-9_38.

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Gooch, Jan W. "Chlorofluorocarbon Resin." In Encyclopedic Dictionary of Polymers, 141. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2325.

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Kónya, Z., I. Hannus, P. Lentz, J. B. Nagy, and I. Kiricsi. "Alumina and Zeolites as Catalysts for Decomposition and Transformation of Chlorofluorocarbons Studied by Multinuclear NMR Methods." In Magnetic Resonance in Colloid and Interface Science, 559–64. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0534-0_54.

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Ying, J. F., C. P. Mathers, and K. T. Leung. "Valence and Inner Shell Multipole Electronic Excitations in Chlorofluorocarbons by Momentum-Transfer-Resolved Electron Energy Loss Spectroscopy." In Electron Collisions with Molecules, Clusters, and Surfaces, 141–50. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1489-7_11.

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Drenkard, S., N. Plummer, E. Busenberg, P. Schlosser, M. Stute, and H. Dörr. "Applications of the Transient Tracers Tritium/Helium-3, and Chlorofluorocarbons for Tracing and Age-Dating Young Ground Water: Field Examples from the USA and Germany." In Soil & Environment, 195–96. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0415-9_33.

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Conference papers on the topic "Chlorofluorocarbons"

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Stix, T. H. "Removal of chlorofluorocarbons from the troposphere." In International Conference on Plasma Sciences (ICOPS). IEEE, 1993. http://dx.doi.org/10.1109/plasma.1993.593398.

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Bullock, Donald L., Diana Dee, and Marcy M. Valley. "Removal of atmospheric chlorofluorocarbons by lasers." In OE/LASE '92, edited by Richard C. Wade and Peter B. Ulrich. SPIE, 1992. http://dx.doi.org/10.1117/12.58993.

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Puchebner, Birgit E. "Chlorofluorocarbons in the Workplace: A Summary of Guidelines and Alternatives." In Optical Fabrication and Testing. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/oft.1994.owc4.

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The Montreal Protocol on Substances That Deplete the Ozone Layer mandates an end to the industrialized countries' production of chlorofluorocarbons (CFCs), carbon tetrachloride, and methyl chloroform by January 1, 1996. This treaty effects everyone from the CEO of a top chemical producer to the next door neighbor driving to work everyday.

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Evans, W. F. J. "The Temporal Increase in Greenhouse Radiation from Chlorofluorocarbons in the Atmosphere." In Optical Remote Sensing of the Atmosphere. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/orsa.1991.otua5.

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The buildup of radiatively active gases in the atmosphere has affected the energy balance of the climate system. The atmosphere is in balance between incoming solar radiation of about 250 watts/m2 and outgoing long wave infrared heat radiation of 250 watts/m2 from the cold atmosphere at 12 km. At the surface, the outgoing heat flux is about 350 watts/m2; the atmosphere radiates about 100 watts/m2 downwards to the surface. The surface also transfers heat to the atmosphere by convection and evaporation of water vapour. Thus, the atmosphere absorbs and reradiates about 100 watts/m2; this is called the greenhouse radiation. Any increase in the absorption caused by adding gases to the atmosphere will increase this greenhouse radiation. The man made increase in atmospheric greenhouse gases over the last 50 years has produced about a 2.5 watt/m2 increase in the greenhouse radiation(Dickinson and Cicerone,1986) and we expect a corresponding increase in surface temperature to occur.

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Abdullah, M. O., and S. L. Leo. "Feasibility Study of Solar Adsorption Technologies for Automobile Air-Conditioning." In ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76064.

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An adsorption system driven by solar heat or waste heat can help to eliminate the use of ozone depletion substances, such as chlorofluorocarbons (CFCs) and hydro-chlorofluorocarbons (HCFCs). In recent years, adsorption system has witnessed an increasing interest in many fields due to the fact that this system is quiet, long lasting, cheap to maintain and environmentally benign. Although adsorption system is not commonly used for automobile air conditioning, adsorption-cooled mini-refrigerators have been marketed for recreational transports (motor homes, boats, etc). Hence, there exists a need for a creative design and innovation to allow adsorption technology to be practical for air conditioning in automobile. The objective of this paper is to present a comprehensive review on the past efforts in the field of solar adsorption refrigeration systems and also the feasibility study of this technology for automobile airconditioning purpose. It is a particularly an attractive application for solar energy because of the near coincidence of peak cooling loads with the available of solar power.

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Varanasi, P., and V. Nemtchinov. "A Spectroscopic Database for Satellite Remote Sensing of Chlorofluorocarbons and Their Alternates." In Optical Remote Sensing of the Atmosphere. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/orsa.1997.omd.6.

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In view of the world-wide interest in the remote sensing of chloro-fluoro-carbons (CFC’s), especially CFC-11 (CFCl3) and CFC-12 (CF2Cl2), hydro-chloro-fluoro-carbons (HCFC’s), HCFC-22 (CHFCl2) in particular, the fluorocarbon CF4, the chlorocarbon CCl4, and sulphur hexaflouride (SF6), we have been performing laboratory measurements of the spectral absorption cross-sections needed for the retrieval of the atmospheric vertical mixing ratios and column abudances of these chemicals from data obtained by satellite-based infrared instruments. These chemicals, which possess either a strong ozone-depletion potential or a global-warming potential, or both, have infrared absorption features that do not readily lend themselves to the conventional line-by-line analysis.1,2 Therefore, we adapted a novel technique of measuring the absorption cross-section, kν (cm2 molecule-1), which is defined as kν = (-ln τν)/pξL in terms of the spectral tranmittance τν at the wavenumber ν, temperature T, and total pressure p along an optical path of length L through the absorbing chemical with a mixing ratio of ξ in N2 (used in place of air without any measurable difference in the measured kν) directly. Highly accurate kν measured in the thermal infrared bands of CFC-11 (CFCl3), CFC-12 (CF2Cl2), HCFC-22 (CHFCl2), and SF6 at several (T,p) combinations representing atmospheric layers3 have already been presented at the last Topical Meeting of this series.2 We present now the significant enhancement that we have produced in the database on cross-sections by extending our earlier measurements to include additional chemicals such as CF4 (CFC-14) and CCl4 and conditions encountered in the atmosphere at Arctic and Antarctic latitudes. Our data (Figs. 1 and 2), which were obtained at pressures and temperatures given in commonly tabulated atmospheric models3 and represent tangent heights in solar occultation type remote sensing observations of the atmosphere as well as conditions encountered in the polar regions, are directly applicable to the analysis of the satellite data. The data were obtained at temperatures between 180 and 295 K using a high-resolution Fourier-transform spectrometer and are free from instrumental distortion, since the spectra were recorded at spectral resolution that was sufficiently high at broadening pressures corresponding to tropospheric and stratospheric layers. Various methods of extending these data to conditions not covered in the experiments will be discussed.

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Okuhata, Brytne, Aly El-Kadi, Henrietta Dulai, Jonghyun Lee, Donald Thomas, and Brian N. Popp. "Assessment of Groundwater Ages Using Radiocarbon and Chlorofluorocarbons in West Hawai'i Aquifer Systems." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1987.

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Varanasi, Prasad. "IR absorption coefficients of CFC-12 and CFC-22." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.mu5.

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Infrared line positions of many chlorofluorocarbons are difficult to catalog because the lines are densely packed. Lines belonging to hot bands and isotopic bands further complicate the problem. It is desirable to measure the absorption coefficient itself over the range of wave numbers, temperatures, and pressures that are appropriate to remote sensing experiments in the atmosphere. Because the ultimate goal in any lineby-line scheme is to compute the absorption coefficient, kv, a computation that can be flawed by our lack of knowledge of all the spectroscopic parameters governing line absorption and of their temperature and pressure dependence, why not measure the absorption coefficient directly in the laboratory?

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Garland, Patricia Welesko, Robert C. DeVault, and Abdi Zaltash. "United States Department of Energy Large Commercial Absorption Chiller Development Program." In ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-0852.

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Abstract The U.S. Department of Energy (DOE) is working with partners from the gas cooling industry to improve energy efficiency and U.S. competitiveness by using advanced absorption technologies that eliminate the use of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), refrigerants that contribute to ozone depletion and global warming. Absorption cooling uses natural gas as the heat source, which produces much lower NOx emissions than oil- or coal-generated electricity. Gas-fired chillers also have the advantage of helping reduce peak electrical usage during summer months. To assist industry in developing advanced absorption cooling technologies, DOE sponsors the Large Commercial Chiller Development Program. The goal of the program is to improve chiller cooling efficiency by 30–50% compared with the best currently available absorption systems.

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Umar, Muhammad, and Charles A. Garris. "Effect of Geometric Parameters on the Performance of a Radial Flow Pressure Exchange Ejector." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-40480.

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The “Pressure exchange” is a novel concept in turbomachinery whereby two fluids, at different energy levels, come in direct contact with each other to transfer energy and momentum between them through non-steady interface pressure forces. The rotating jets of the high pressure primary fluid, often referred to as pseudoblades, resemble solid blades on the impeller of a conventional turbomachine. The low pressure secondary fluid, ahead of the pseudoblades, is pressurized by the action of interface pressure forces. The current paper seeks to provide an insight into the complex flow phenomena occurring inside the radial flow pressure exchange ejector. This research presents the results of the first successful numerical simulation to explore the effects of spin angle, rotor cone angle and number of nozzles on the performance of a radial flow pressure exchange ejector. If this new concept is shown to be viable for gas compression at sufficiently high pressure ratios, then, in refrigeration applications, it would enable environmentally benign refrigerants to replace the harmful chlorofluorocarbons (CFC) and reduce the effluence of greenhouse gases. Applications in many other areas, where conventional ejectors are currently used, are also possible.

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Reports on the topic "Chlorofluorocarbons"

1

Perry, A. M. Environmental effects of chlorofluorocarbons: Will restrictions be needed. Office of Scientific and Technical Information (OSTI), October 1986. http://dx.doi.org/10.2172/7191226.

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Van Hook, R., P. Fairchild, W. Fulkerson, A. Perry, J. Regan, and G. Taylor. Environmental, health, and CFC (chlorofluorocarbons) substitution aspects of the ozone depletion issue. Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/5293212.

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Busenberg, E., E. P. Weeks, L. N. Plummer, and R. C. Bartholomay. Age dating ground water by use of chlorofluorocarbons (CCl{sub 3}F and CCl{sub 2}F{sub 2}), and distribution of chlorofluorocarbons in the unsaturated zone, Snake River Plain aquifer, Idaho National Engineering Laboratory, Idaho. Office of Scientific and Technical Information (OSTI), April 1993. http://dx.doi.org/10.2172/10177237.

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Busenberg, E., L. N. Plummer, R. C. Bartholomay, and J. E. Wayland. Chlorofluorocarbons, Sulfur Hexafluoride, and Dissolved Permanent Gases in Ground Water from Selected Sites In and Near the Idaho National Engineering and Environmental Laboratory, Idaho, 1994 - 1997. Office of Scientific and Technical Information (OSTI), August 1998. http://dx.doi.org/10.2172/765438.

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Solomon, Kip, and Troy Gilmore. Age Dating Young Groundwater. The Groundwater Project, 2023. http://dx.doi.org/10.21083/liiu2727.

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Abstract:

This book provides an overview of common tracer methods that can be used to estimate the age of young groundwater that recharged less than about 60 years ago. In this book, applications of tracers to address hydrogeologic problems are only mentioned briefly because such problems are the topic of the Groundwater Project Book titled Introduction to Isotopes and Environmental Tracers as Indicators of Groundwater Flow (Cook, 2020) which readers are encouraged to review. The dating tracer methods include tritium (3H), tritium/helium-3 (3H/3He), sulfur hexafluoride (SF6) and chlorofluorocarbons (CFCs). All these methods except 3H involve the occurrence and transport of dissolved gases and thus the basic concepts of dissolved gases are discussed in this book. The authors are hydrogeologists interested in solving both groundwater quality and quantity issues in a world in which the availability of high-quality groundwater is diminishing. The goal of this book is to inform researchers and policy makers about the concepts and underlying assumptions involved in groundwater dating methods with the aim of increasing the application of these powerful methods while informing readers of their inherent limitations.

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Munday, E. B. Chlorofluorocarbon leak detection technology. Office of Scientific and Technical Information (OSTI), December 1990. http://dx.doi.org/10.2172/6175700.

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Marseille, T. J., D. L. Shankle, and A. G. Thurman. International research into chlorofluorocarbon (CFC) alternatives. Office of Scientific and Technical Information (OSTI), May 1992. http://dx.doi.org/10.2172/10146255.

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Marseille, T. J., D. L. Shankle, and A. G. Thurman. International research into chlorofluorocarbon (CFC) alternatives. Office of Scientific and Technical Information (OSTI), May 1992. http://dx.doi.org/10.2172/5204054.

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Marseille, T. J., and M. C. Baechler. Chlorofluorocarbon environmental issues related to conservation acquisition in commercial buildings. Office of Scientific and Technical Information (OSTI), September 1990. http://dx.doi.org/10.2172/6204435.

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McElroy, D., and M. Scofield. Chlorofluorocarbon (CFC) technologies review of foamed-board insulation for buildings. Office of Scientific and Technical Information (OSTI), March 1990. http://dx.doi.org/10.2172/6816593.

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