RT Journal Article
T1 Inverse heat problem of determining unknown surface heat flux in a molten salt loop
A1 Fernández Torrijos, María
A1 Sobrino Fernández, Celia
A1 Almendros Ibáñez, José Antonio
A1 Marugán Cruz, Carolina
A1 Santana Santana, Domingo José
AB Inverse heat transfer problems typically rely on temperature measurements for estimating unknown boundary heat flux, such as that in the water tubes of steam boilers or central receivers in solar tower power plants. In this work, an experimental facility consisting of a molten salt loop that simulates a tube of a solar tower receiver is presented to obtain the outer tube surface temperatures under solar tower power plant operating conditions. The external surface f the pipe in the test section is heated in a controlled manner with an induction heater, which provides a very high nonuniform heat flux. An inverse thermal method has been applied to obtain the incident heat flux onto the receiver tube from the outer surface temperature measurements. To solve the inverse problem, a transient two-dimensional numerical model of a circular pipe flowing molten nitrate salt and subjected to a nonhomogeneous circumferential heat flux has been developed. The heat flux calculation with the inverse method is in accordance with the heat flux estimation based on the calibration of the induction heater. A good agreement between the experimental and calculated temperatures is observed. Furthermore, the deflection of the tube caused by the nonhomogeneous heat flux is measured and is compared to the deflection calculated from the radial temperature profile from the inverse problem solution, and a good agreement between both results is observed.
PB Elsevier
SN 0017-9310
YR 2019
FD 2019-08-01
LK http://hdl.handle.net/10016/32165
UL http://hdl.handle.net/10016/32165
LA eng
NO This work was partially funded by the Ministerio de Eduación, Cultura y Deporte para la Formación de Profesorado Universitario (FPU-04941), the Ministerio de Ciencia, Innovacion y Universidades (Project RTI2018-096664-B-C21 (MICINN/FEDER, UE)) of the Spanish Government and the Project SBPLY/17/180501/000412 of the Regional Government of Castilla-La Mancha.
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RD 27 abr. 2024