An automatic noncontact measurement technique for investigation of the effect of frosting on wind convector heat transfer performance

✍ Scribed by P.F. Monaghan; M. Redfern; P.H. Oosthuizen; F.W. Grealish; D.P. Finn

• Book ID: 103926869
• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 685 KB
• Volume: 4
• Category: Article
• ISSN: 0894-1777
• DOI: 10.1016/0894-1777(91)90003-a

✦ Synopsis

This paper describes the design, testing, and performance of a computer vision/load cell system for automatic measurement of mass and depth of frost accumulated on heat exchangers located outdoors. Frost mass accumulation of up to 10 kg and frost depths of up to 12 mm have been recorded in test runs of up to 24 h. The uncertainty for these measurements is + 0.016 kg and ___ 0.1 mm, respectively. Data on heat transfer rates and weather conditions are also logged automatically. Frost layer development outdoors and its effect on heat transfer do not always follow the same trends found for frosting in steady laboratory conditions.