Optimum Selection of Refrigerants Under Environmental Constraints

Watanabe, Koichi

doi:10.1007/978-94-010-0099-4_5

Cited by 1 publication

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within the next few decades, other chemically related refrigerants were additionally commercialised, including chlorodifluoromethane, or a hydrochlorofluorocarbon known as HCFC-22, which found use in a wide array of applications such as air conditioners, chillers, and refrigeration for food retail and industrial processes. Additionally, HCFC-22 was a component of refrigerant R-502, an azeotropic blend of 48.8 % HCFC-22 and 51.2 % CFC-115 by mass, introduced in the 1960s for commercial refrigeration equipment (Watanabe, 2003). The use of chlorodifluoromethane has also grown as a feedstock, for example its pyrolysis yields tetrafluoroethylene (TFE), the monomer for polytetrafluoroethylene (PTFE), which is trademarked as Teflon (Myers, 2007).…”

Section: Introductionmentioning

confidence: 99%

New and improved infrared absorption cross sections for chlorodifluoromethane (HCFC-22)

Harrison

2016

Atmos. Meas. Tech.

View full text Add to dashboard Cite

Abstract. The most widely used hydrochlorofluorocarbon (HCFC) commercially since the 1930s has been chlorodifluoromethane, or HCFC-22, which has the undesirable effect of depleting stratospheric ozone. As this molecule is currently being phased out under the Montreal Protocol, monitoring its concentration profiles using infrared sounders crucially requires accurate laboratory spectroscopic data. This work describes new high-resolution infrared absorption cross sections of chlorodifluoromethane over the spectral range 730-1380 cm −1 , determined from spectra recorded using a high-resolution Fourier transform spectrometer (Bruker IFS 125HR) and a 26 cm pathlength cell. Spectra of chlorodifluoromethane/dry synthetic air mixtures were recorded at resolutions between 0.01 and 0.03 cm −1 (calculated as 0.9/MOPD; MOPD denotes the maximum optical path difference) over a range of temperatures and pressures appropriate for atmospheric conditions. This new cross-section dataset improves upon the one currently available in the HITRAN (HIgh-resolution TRANsmission) and GEISA (Gestion et Etude des Informations Spectroscopiques Atmosphériques) databases; in particular it provides coverage over a wider range of pressures and temperatures, has more accurate wavenumber scales, more consistent integrated band intensities, improved signalto-noise, is free of channel fringing, and additionally covers the ν 2 and ν 7 bands.

show abstract

Section: Introductionmentioning

confidence: 99%

New and improved infrared absorption cross sections for chlorodifluoromethane (HCFC-22)

Harrison

2016

Atmos. Meas. Tech.

View full text Add to dashboard Cite

show abstract

Optimum Selection of Refrigerants Under Environmental Constraints

Cited by 1 publication

References 20 publications

New and improved infrared absorption cross sections for chlorodifluoromethane (HCFC-22)

New and improved infrared absorption cross sections for chlorodifluoromethane (HCFC-22)

Contact Info

Product

Resources

About