RT Journal Article
T1 New methodology for CFD simulations of compact evaporators used in automotive ORC systems
A1 Paz Penín, Maria Concepcion
A1 Suárez Porto, Eduardo
A1 Porteiro Fresco, Jacobo
A1 Diaz Garcia, Antonio
K1 3303.06 Tecnología de la Combustión
K1 3313.13 Motores de Combustión Interna (General)
AB Waste heat dissipated in exhaust systems of a combustion engine represent a major source of energy that can be recovered and converted into useful work. Waste heat recovery systems based on the organic Rankine cycle (ORC) have already proven their efficiency in recovering energy from different heat sources, thus, achieving a significant reduction in fuel consumption and exhaust emissions. This study aims to evaluate an engine's main component, an evaporator, using computational fluid dynamics (CFD). This study implements a coupling methodology between a one-dimensional discretised model of a working fluid (WF) and a three-dimensional solution for the gas and metal sides in the CFD software ANSYS Fluent. Computational results were compared with experimental test-bench data and with wall temperature contours registered using infrared thermography, which elicited good agreement regarding the evaporator performance, outlet temperature responses of the gas and WF, and wall temperatures. The evolution along the evaporator for all the parameters of interest, such as vapour quality, Reynolds or Nusselt numbers, and local thermal properties, were also predicted. The presented methodology represents a valuable tool for aiding the design and enhancement of compact evaporators used in automotive ORC systems.
PB International Journal of Thermal Sciences
SN 12900729
YR 2019
FD 2019-09
LK http://hdl.handle.net/11093/6995
UL http://hdl.handle.net/11093/6995
LA eng
NO International Journal of Thermal Sciences, 143, 14-26 (2019)
DS Investigo
RD 02-dic-2024