Theoretical Thermal Evaluation of Energy Recovery Incinerators—Part II: Parametric Examination

1987 ◽  
Vol 109 (2) ◽  
pp. 84-89
Author(s):  
C. A. Kodres
Keyword(s):  
Heat Exchanger ◽  
Computer Program ◽  
Energy Recovery ◽  
Thermal Characteristics ◽  
Mathematic Model ◽  
Governing Equations ◽  
Combustion Chambers ◽  
Tube Heat Exchanger ◽  
Water Tube

The thermal characteristics of energy recovery incinerators are examined, both parametrically and, to the extent possible, by direct comparison. A mathematic model is employed, using a computer program to solve the governing equations. Three energy recovery configurations are considered: a water tube heat exchanger downstream from the combustion chambers, waterwalls, and a combination of the two. Results show the advantages of combining water walls and a convection boiler.

scholarly journals Study of heat transfer and pressure drop characteristics of air heat exchanger using PCM for free cooling applications

2016 ◽  
Vol 20 (5) ◽  
pp. 1543-1554 ◽  
Author(s):  
Sivakumar Kalaiselvam ◽  
Kanchipuram Sureshkumar ◽  
Vijeykishoor Sriram
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Phase Change Materials ◽  
Thermal Characteristics ◽  
Ambient Air ◽  
Dynamics Modeling ◽  
Tube Heat Exchanger ◽  
High Heat Transfer ◽  
Free Cooling

Free cooling is the process of storing the cool energy available in the night ambient air and using it during the day. The heat exchanger used in this work is a modular type which is similar to the shell and tube heat exchanger. The shell side is filled with Phase Change Materials (PCM) and air flow is through the tubes in the module. The modules of the heat exchanger are arranged one over other with air spacers in between each module. The air space provided in between the module in-creases the retention time of the air for better heat transfer. Transient Computational Fluid Dynamics modeling is carried out for single air passage in a modular heat exchanger. It shows that the PCM phase transition time in the module in which different shape of fins is adopted. The module with rectangular fins has 17.2 % reduction in solidification compared with the plain module. Then steady state numerical analysis is accomplished to the whole module having the fin of high heat transfer, so that pressure drop, flow and thermal characteristics across the module and the air spacers are deter-mined for various air inlet velocities of 0.4 to 1.6 m/s. To validate the computational results, experiments are carried out and the agreement was found to be good.

Sign in / Sign up

Export Citation Format

Share Document