Single-Phase Flow and Condensation in Pillow-Plate Condensers

Recent Advances in Experimental Techniques for Flow and Mass Transfer Analyses in Thermal Separation Systems

“…Condensation performance worsens substantially when non‐condensables are present (Fig. c) resulting in a significantly lower overall heat transfer coefficient . This effect can be explained by diffusional effects in a boundary layer built up by the non‐condensable component at the vapor‐liquid interface.…”

“…b) Condensation heat transfer coefficients as a function of heat flux density: measurements for water at film Reynolds numbers between 10 and 60 (adapted from ). c) Ratio of overall heat transfer coefficients with ( U N2 ) and without ( U ) nitrogen evaluated for varied nitrogen volume fraction: single‐phase heat transfer coefficients in outer channels h o1 > h o2 > h o3 (adapted from ).…”

“…The plant can be used to investigate the thermohydraulic condensation behavior and to determine overall heat transfer coefficients and pressure drop during the condensation of pure substances and binary mixtures, while three different methods are used to record the accumulated condensate mass flows. Pure substances as well as binary mixtures containing a non‐condensable substance have been studied under different operating conditions , . Using another experimental setup allowing heat transfer in the cooling channels to be determined , individual heat transfer coefficients in both, inner and outer channels, can be evaluated.…”

“…In the InnovA 2 project, several experimental studies on the condensation of water, iso‐propanol and their mixtures with nitrogen have been carried out , . In the experiments with pure water shown in Fig.…”