publication . Doctoral thesis . 2012

Pressure drop during condensation inside smooth, helical micro-fin, and herringbone micro-fin tubest

Open Access
  • Published: 08 Aug 2012
  • Country: South Africa
Abstract
M.Ing. Since the promulgation of the Montreal Protocol many refrigerants needed to be phased out. R-22, which is a widely used refrigerant in refrigeration systems, was one of these. Many replacements have been found throughout the years but very few have the same refrigeration capacity without being penalised by an increase in pressure drop. R-407C is one of the refrigerants having the potential to replace R-22 as it has the same theoretical coefficient of performance and has a lower global warming potential. However, due to its zeotropic characteristics there is a degradation in heat transfer during evaporation and condensation attributed to mass transfer resi...
Subjects
free text keywords: Heat -Transmission, Heat pumps, Condensation, Refrigerants
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