Determination of transfer coefficients by psychrometry

✍ Scribed by A. Kondjoyan; J.D. Daudin

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 991 KB
• Volume: 36
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/s0017-9310(05)80167-x

✦ Synopsis

This

paper presents a method based on psychrometry for measuring simultaneously heat and mass transfer coefficients in the case of forced convective exchanges between air and a body surface. This method is specially well adapted to bodies of complex shapes. The theoretical aspects are described. Errors linked to data treatments and to measurements are discussed. The method is tested for a circular cylinder in cross flow in the following conditions : 3500 < Re <: 26 000, Tu = l2%, T,,, = 25°C. Discussion shows that errors can be reduced to less than 2% for mean transfer coefficients and less than 5% for local coefficients.