The egg steamer paradox

2021 ◽  
Vol 57 (2) ◽  
pp. 025002
Author(s):  
S Flach ◽  
S Parnovsky ◽  
A A Varlamov
Keyword(s):  
Heat Transfer ◽  
Latent Heat ◽  
Measurement Data ◽  
Transfer Mechanism ◽  
Heat Transfer Mechanism ◽  
Device Design ◽  
Physical Processes ◽  
Preparation Time ◽  
Water Reduction ◽  
The One

Abstract Why do we need to pour less water in an egg steamer to prepare more eggs to the same degree of ‘doneness’? We discuss the physical processes at work in the electric egg steamer and resolve this seeming paradox. We demonstrate that the main heat transfer mechanism from steam to egg is due to latent heat through condensation. This not only explains the paradox, but also allows us to estimate the amount of water reduction. Comparing the preparation time to the one for traditional boiling, we estimate the eggshell temperature during steaming. We also describe the device design and provide further theoretical estimates and experimental kitchen measurement data for this appealing kitchen experiment that can be easily accomplished at home.

Experimental Investigation Into the Heat Transfer Mechanism of Oscillating Heat Pipes Using Temperature Sensitive Paint

2021 ◽  
Vol 143 (4) ◽  
Author(s):  
Matthew Francom ◽  
Jungho Kim
Keyword(s):  
Heat Transfer ◽  
Latent Heat ◽  
Fluid Motion ◽  
Heat Pipes ◽  
Transfer Mechanism ◽  
Working Fluid ◽  
Temperature Sensitive ◽  
Heat Transfer Mechanism ◽  
Experimental Apparatus ◽  
Temperature Sensitive Paint

Abstract Oscillating heat pipes (OHPs) represent a promising passive mechanism for the removal or spreading of heat. While simple to construct, the fluid and thermodynamics of these devices are still poorly understood. There is debate over whether the primary heat transfer mechanism is due to sensible heating of the liquid phase or due to latent heat transfer through phase change. To answer this question, an experimental apparatus was constructed to provide time- and space-resolved temperature and heat transfer data across the face of an operating OHP with HFE-7000 as the working fluid. This experiment utilized temperature sensitive paint (TSP) alongside visual recording of the fluid motion in order to determine the relative latent and sensible contribution to the overall heat transfer. The OHP was tested with input powers ranging from 2.6 W to 10.1 W. It found that latent heat transfer was the dominant heat transfer mechanism, accounting for between 65% and 83% of the total heat transferred in all cases.

Heat transfer mechanism driven by acoustic body force under acoustic fields

2021 ◽  
Vol 6 (7) ◽  
Author(s):  
Varun Kumar ◽  
Mohammed Azharudeen ◽  
Charish Pothuri ◽  
Karthick Subramani
Keyword(s):  
Heat Transfer ◽  
Body Force ◽  
Transfer Mechanism ◽  
Acoustic Fields ◽  
Heat Transfer Mechanism

Heat-transfer mechanism at a gas-fiber boundary

1979 ◽  
Vol 36 (1) ◽  
pp. 37-42 ◽  
Author(s):  
I. G. Chumak ◽  
V. G. Pogontsev
Keyword(s):  
Heat Transfer ◽  
Transfer Mechanism ◽  
Heat Transfer Mechanism
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