Thermal model of the dishwasher heater in air

Author

McDonald, Alan T. ; Friskney, Stephen H. ; Ulrich, David J.

Author_Institution

Sch. of Mech. Eng., Purdue Univ., West Lafayette, IN, USA

Volume

25

Issue

6

fYear

1989

Firstpage

1176

Lastpage

1180

Abstract

A thermal model of the dishwasher heater has been formulated, programmed for computer solution, and verified. In the model, all significant parameters that affect heater operation-power input, geometry, and operating strategy-can be varied. Results predicted by the simulation include surface temperature versus time for heating or cooling, steady-state surface temperature, and the contributions of radiation and convection to the total heat transfer rate. Parametric studies were made to investigate the influence of surface heat fluxes in a range 10-40 W/in². Increasing the surface heat flux raised the steady-state heater surface temperature and caused it to be approached more quickly. Radiation increased from 64 to 81% of total heat transfer. Correlating equations of simple power-law form were found to represent each of these trends within a few percent

Keywords

domestic appliances; electric heating; thermal analysis; convection; dishwasher heater; geometry; operating strategy; power input; radiation; steady-state surface temperature; surface heat fluxes; total heat transfer rate; Computational modeling; Cooling; Equations; Geometry; Heat transfer; Parametric study; Predictive models; Solid modeling; Steady-state; Temperature;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.44256

Filename

44256