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Table 2 Controlled and variable parameters

From: Application of silver nanofluid containing oleic acid surfactant in a thermosyphon economizer

  The tubes were arranged in a staggered
  Operating temperature of 60,70 and 80°C
The controlled parameters Silver nanofluid concentration of 0.5 w/v%
  Volumetric flow rate was 5 l/min in evaporator section
  Cool water flow was 25°C in condenser section
  Working fluid = pure water, silver nanofluid concentration of 0.5 w/v% and silver nanofluid concentration of 0.5 w/v% mixed oleic acid surfactant
The variable parameters Concentration of oleic acid surfactant were 0.5, 1, 1.5 w/v%
  Volumetric flow rate were 1, 2, 5 l/min in condenser section
  Filling ratio = 30, 50, and 80% (by total length of evaporator)