Sensible and Latent Heat Transfer in Cross-Counterflow Gas-To-Gas Heat Exchangers

1989 ◽  
Vol 111 (1) ◽  
pp. 173-177 ◽  
Author(s):  
R. B. Holmberg
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Heat Exchangers ◽  
Air Conditioning ◽  
Absolute Humidity ◽  
Transfer Equations ◽  
Difference Type ◽  
Air Conditioning Systems ◽  
Simultaneous Heat ◽  
Steady State Performance

Simultaneous heat and mass transfer during condensation in cross-counterflow gas-to-gas heat exchangers has been analyzed. The coupled heat and mass transfer equations are derived for boundary-layer controlled heat and mass transfer and include longitudinal heat conduction in the exchanger wall. A numerical method of the finite-difference type is applied to the steady-state performance. Temperature and absolute humidity distributions are calculated for exchanger parameters that are typical in air conditioning systems. Temperature and humidity efficiencies together with frosting limits are evaluated for different inlet air conditions.

Heat and Mass Transfer in Rotary Heat Exchangers With Nonhygroscopic Rotor Materials

1977 ◽  
Vol 99 (2) ◽  
pp. 196-202 ◽  
Author(s):  
R. B. Holmberg
Keyword(s):  
Mass Transfer ◽  
Heat Conduction ◽  
Steady State ◽  
Heat Exchanger ◽  
Heat And Mass Transfer ◽  
Heat Exchangers ◽  
Air Conditioning ◽  
Absolute Humidity ◽  
Difference Type ◽  
Steady State Performance

Heat and mass transfer in rotary heat exchangers with nonhygroscopic rotor materials have been investigated. A numerical method of the finite-difference type is applied to the steady-state performance under conditions of finite rotational speed and finite longitudinal heat conduction. Temperature and absolute humidity distributions are calculated for a set of rotary heat exchanger parameters typical in air conditioning, and temperature and humidity efficiencies are evaluated for different inlet air conditions.

Combined Heat and Mass Transfer in Regenerators with Hygroscopic Materials

1979 ◽  
Vol 101 (2) ◽  
pp. 205-210 ◽  
Author(s):  
R. B. Holmberg
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Transfer Equations ◽  
Difference Type ◽  
The Matrix ◽  
Flow Heat ◽  
Performance Results ◽  
Heat And Moisture ◽  
Matrix Heat ◽  
Simultaneous Heat

Simultaneous heat and mass transfer in periodic-flow heat and mass exchangers, or regenerators, with hygroscopic matrix materials has been analyzed. The coupled heat and mass transfer equations are derived for boundary-layer controlled heat and mass transfer and include longitudinal heat conduction in the matrix. A numerical method of the finite-difference type is applied to the steady-state performance. Results for a water vapor-air mixture show the influence of matrix heat and moisture capacities on temperature and humidity efficiencies. Distributions of air temperature, air humidity, matrix temperature and adsorbent moisture content are calculated in drying as well as recovery operations.

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