NDLI: Development of a Profiled Multilayer Tube for High Temperature Solar Receivers and Heat Exchangers

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jedamski, Jens Amsbeck, Lars Buck, Reiner Couturier, Raphael Heller, Peter Tochon, Patrice Uhlig, Ralf Vasquez, Felipe
Copyright Year	2010
Abstract	In solar tower plants absorber tubes are the main components of various solar receivers, e.g. steam receivers, salt receivers, pressurized air receivers. The solar radiation on the absorber tube causes an inhomogeneous temperature distribution because most of the solar radiation along the tube circumference is one-sided. The resulting internal stresses of the tube and the maximum fluid temperature decrease the lifetime significantly. Within the projects SOLHYCO and FUTUR a profiled multilayer tube (PML) is currently under development in order to reduce this problem. It consists of three metallic layers: a high temperature nickel-based alloy at the outer side, a copper layer as intermediate layer and another high temperature nickel-based alloy at the inner side of the tube. The outer layer provides the structural strength while the copper is used to conduct the heat from the irradiated side to the opposite side. The inner layer protects the copper from corrosion and oxidation at high temperatures. In addition, a wire coil is inserted (profiled) to increase the heat transfer on the inside. The PML is manufactured in a hydro-forming process by deforming the tube composite with water under high pressure. To demonstrate the performance and to determine the heat transfer, the pressure loss and the temperature distribution, a test loop was built to simulate the different loads under laboratory conditions. The thermo hydraulic measurements and finite element calculations show that the temperature gradient and the maximum temperature can be reduced significantly. Based on these studies the advantages of the PML in comparison to common tubes will be presented as well as several possibilities for future improvements.
Sponsorship	Heat Transfer Division
Starting Page	483
Ending Page	489
Page Count	7
File Format	PDF
ISBN	9780791849422
DOI	10.1115/IHTC14-22094
e-ISBN	9780791838792
Volume Number	2010 14th International Heat Transfer Conference, Volume 7
Conference Proceedings	2010 14th International Heat Transfer Conference
Language	English
Publisher Date	2010-08-08
Publisher Place	Washington, DC, USA
Access Restriction	Subscribed
Subject Keyword	Water Temperature distribution Temperature Structural mechanics Alloys Heat exchangers High temperature Wire Pressure Stress Temperature gradient High pressure (physics) Fluids Heat Composite materials Corrosion Solar energy Steam Nickel Oxidation Finite element analysis Copper Solar radiation Heat transfer
Content Type	Text
Resource Type	Article

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