A two-dimensional model for the heat transfer on the external circuit of a Stirling engine for a dish/Stirling system

Conference · Wed Jul 01 04:00:00 EDT 1998

OSTI ID:20000229

Makhkamov, K K; Ingham, D B

In this paper the {kappa}-{var{underscore}epsilon} turbulent model for the incompressible fluid flow has been used to describe the heat transfer and gas dynamical processes on the external circuit of a Stirling Engine as used on a Solar Dish/Stirling System. The problem considered, in this work for a cavity-type heat receiver of the Stirling Engine, is that of the heat transfer in the body of the shell of the heat exchangers of the engine due to the thermal conductivity, the convective heat transfer between the working fluid and the walls of the engine internal gas circuit and the heat transfer due to the forced convection of the air in the cavity and in the attached air domain. The boundary conditions employed on the engines internal circuit were obtained using the developed one-dimensional second level mathematical model of the engine working cycle. Physical models for the distribution of the solar insolation on the bottom and side walls of the heat receiver have been taken into account and the temperature fields for the heat receiver and the air velocity have been obtained for the case when the heat receiver is affected by wind. The numerical results show that it is in the region of the boundary of the input window of the heat receiver where there is the largest reduction in the temperature in the shell of the heat exchangers and this is due to the convection of the air.

• Research Organization: Physical and Technical Institute of the Uzbek Academy of Sciences, Tashkent (UZ)
• OSTI ID: 20000229
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
HEAT TRANSFER
PARABOLIC DISH COLLECTORS
PERFORMANCE
SOLAR HEAT ENGINES
STIRLING ENGINES