2026-09-22T16:41:15Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/34300 2023-07-10 col_2142_5131 col_2142_14787 com_2142_5130 com_2142_9630 com_2142_234

Brewster, M. Quinn Kim, Jong Woo 2012-09-18T21:10:14Z 2012-09-18T21:10:14Z 2012-08 2012-09-18T21:10:14Z 2012-08 Defrosting of domestic refrigerator evaporator coils is currently done with external electrical heaters of various designs using a combination of convection, radiation, and conduction. These designs put unnecessary heat into the refrigerators during the defrosting process and the heat must be taken out again by the compressor work. Radiation, which has a fundamentally different mechanism from conduction and convection, can have significant advantages over traditional defrosting methods since it doesn’t heat up the air inside evaporator. Defrosting experiments are done to find out the effectiveness of microwave defrosting in a commercial microwave oven. Frost is formed on the small aluminum evaporator with a controlled temperature and mass and thaws out in the microwave oven while measuring the defrosting conditions. Temperature and geometry of defrosting conditions are discussed by changing the frost temperature and magnetron positions to the evaporator. Later, Monte Carlo simulations are performed to find out the uniformity of defrost in a two-dimensional slot. Various incoming angles and surface conditions are compared to find out the best condition. The fundamental mechanisms of microwave oven defrosting and experiment results are presented in detail. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2012-07-02T15:17:58Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Kim_Jong Woo.pdf: 4282445 bytes, checksum: 83d536ab189dc01dc091c9ce1b4c25d0 (MD5) Made available in DSpace on 2012-09-18T21:10:14Z (GMT). No. of bitstreams: 2 Kim_Jong Woo.pdf: 4281301 bytes, checksum: 0f6763a9c2fa22bfe93825d7f0633b12 (MD5) license.txt: 4057 bytes, checksum: df09a16fc15522dd2c0251019e49257f (MD5) http://hdl.handle.net/2142/34300 en Copyright 2012 Jong Woo Kim Defrosting Radiative Melting Microwave Defrosting Evaporator Defrosting Evaporator Thawing Analytical and experimental examination of microwave defrosting method on commercial refrigerator evaporators Mechanical Sci & Engineering 1917 Mechanical Engineering 0133 University of Illinois at Urbana-Champaign Thesis M.S. MS:Mechanical Engineerng -UIUC 10KS0133MS