This paper indicates how ammonia systems might be adapted to make them more suitable for use on installations which traditionally adopted CFC and HCFC refrigerants in the range 100kW – 600kW cooling capacity for warehouses, blast freezers and food factory applications. The examples draw on over twenty years of experience with low charge systems in Europe, but are specifically focussed on the Am...

Abstract. We have developed a procedure for retrieving atmospheric abundances of HFC-23 (CHF3) with ground-based Fourier transform infrared (FTIR) spectrometer and analyzed the spectra observed at Rikubetsu, Japan (43.5? N, 143.8? E), Syowa Station, Antarctica (69.0? S, 39.6? E). The FTIR retrievals were carried out SFIT4 retrieval program, two spectral windows 1138.5–1148.0 cm?1 1154.0–1160.0 ...

2 Discipline of Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia Abstract: The reaction of a waste refrigerant mixture of CFC-12, HCFC-22 and HFC-134a (in an argon/methane bath gas) in a dielectric barrier discharge non-thermal plasma reactor has been studied. The conversion of the major refrigerant, CFC-12, ranged from 59–76 % fo...

Reductions in stratospheric ozone (O3) cause increased penetration of ultraviolet-B (UV-B) radiation to the troposphere, and therefore increases in the chemical activity in the lower atmosphere (the troposphere). Tropospheric ozone levels are sensitive to local concentrations of nitrogen oxides (NOx) and hydrocarbons. Model studies suggest that additional UV-B radiation reduces tropospheric ozo...