Research on Different Heat Transfer Characteristics of the Dirt on the Pipe

Abstract:

In this study, the dirt adhered on the tubes of different materials (copper alloy tube, stainless steel pipe, polyethylene-aluminum composite pipe) were studied by the scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, PCR amplification, DGGE electrophoresis analyzers. Experimental results show that the microorganism in dirt on the copper alloy tube is mainly shuttle-type bacteria, and the distribution is dense. Stainless steel pipe’s dirt colony is assembling with long bacilli and cocci, polyethylene-aluminum composite pipe’s dirt is the large bacilli and density cocci. Three kinds of dirt in the pipe contains inorganic crystals with SiO₂ and CaCO_3, and the same type of element, but the content is differences, polyethylene-aluminum composite pipe have greater richness of microbial species, a copper alloy tube’s dirt is of little microorganisms.

• Periodical: Applied Mechanics and Materials (Volumes 644-650)
• Pages: 5179-5182
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.644-650.5179
• Online since: September 2014
• Authors: Li Bai*, Tan Liu
• Keywords: DGGE Electrophoresis, Different Materials, Electron Microscopy Observations, Elemental Analysis

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