scholarly journals Toxicological evaluation of liquids proposed for use in direct contact liquid--liquid heat exchangers for solar heated and cooled buildings

1976 ◽  
Author(s):  
R.M. Buchan ◽  
J.R. Majestic ◽  
R. Billau
Keyword(s):  
Heat Exchangers ◽  
Direct Contact ◽  
Toxicological Evaluation ◽  
Liquid Heat ◽  
Contact Liquid

scholarly journals MATHEMATICAL MODELING OF THE THERMODYNAMIC PROCESS GAS-STEAM BUBBLES

2018 ◽  
Vol 1 (50) ◽  
pp. 220-226
Author(s):  
B. А. Kutnyi ◽  
А. М. Pavlenko
Keyword(s):  
Gas Hydrates ◽  
Solid Phase ◽  
Thermodynamic Process ◽  
Size Change ◽  
Process Gas ◽  
Exchange Processes ◽  
Pressure Steam ◽  
Liquid Heat ◽  
Velocity Pressure ◽  
Contact Liquid

A mathematical model that considers the inertial oscillations and thermodynamic components bubbles in liquid heat exchange processes, heat transfer on the boundary bubbles. Research of the dynamic characteristics of gas-steam bubbles in various size was conducted. After the calculations its temperature, velocity, pressure steam environment inside the bubble in time, graphs bubbles size change graphs were built . It is established that each bubble size has its oscillation frequency. Calculated speed phase transients and found that it is in its maximum during the bubble oscillation. For thermodynamic properties of the surface of contact liquid and gaseous phases defined amount of solid phase formed. The research results can be applied to optimize various of technological processes related to the boil, swelling materials, and the formation of gas hydrates in a fluid cavitation.

A Heuristic Evaluation of the Governing Mode of Heat Transfer in a Liquid–Liquid Spray Column

1989 ◽  
Vol 111 (3) ◽  
pp. 773-779 ◽  
Author(s):  
H. R. Jacobs ◽  
M. Golafshani
Keyword(s):  
Heat Transfer ◽  
Small Diameter ◽  
Continuous Phase ◽  
Organic Liquids ◽  
One Dimensional ◽  
Spray Column ◽  
Column Type ◽  
Liquid Heat ◽  
Interphase Heat Exchange ◽  
Contact Liquid

A steady-state one-dimensional multiphase flow model is developed to describe the characteristics of a spray column type direct-contact liquid–liquid heat exchanger. Several models are assumed to describe the interphase heat exchange between water as the continuous phase and organic liquids as the dispersed phase. For small-diameter droplets, it is shown that existing experimental data are best described by a model that assumes the heat transfer is controlled by conduction within the drops.

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