Dynatemp Intl. (www.dynatempintl.com) featured R-421A, an HFC blend, non-ozone depleting, long-term replacement refrigerant for R-22. R-421A can replace R-22 without unit modification and does not contain hydrocarbons such as butane, isopentane, or isobutene. No change of oil is necessary, as it is usable with mineral, alkylbenzene (AB), or polyol ester (POE) oils. R-421A is comparable to R-22’s performance-temperature range and can be used in a wide variety of applications.
Embraco (www.embraco.com) introduced a full range of hydrocarbon compressors with low-temperature cooling capacities from 520-4,780 Btuh and high-temperature capacities from 4,700-10,125 Btuh. These compressors are UL-recognized and have nearly no global warming potential (GWP) or ozone depletion potential (ODP). The company also featured its micro-compressor technology, which allows portable cooling for miniaturized applications. Small and lightweight (about the size of a 12-ounce soda can and weighing 1.4 kg), these micro-compressors are able to operate in any position because they are 100 percent oil-free. Also on display were Fullmotion variable-capacity compressors, which are designed for wine coolers and light commercial applications.