Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Simulation of the Performance Characteristics of the Hybrid Closed Circuit Cooling Tower
The performance characteristics of the Hybrid Closed Circuit Cooling Tower(HCCCT) have been investigated applying computational fluid dynamics (CFD). Widelyreported CFD techniques are applied to simulate the air-water two phase flow insidethe HCCCT. The pressure drop and the cooling capacity were investigated from severalperspectives. Three different transverse pitches were tested and found that a pitch of45 mm had lower pressure drop. The CFD simulation indicated that when air is suppliedfrom the side wall of the HCCCT, the pressure drop can be over predicted and the coolingcapacity can be under predicted mainly due to the non-uniform air flow distribution acrossthe coil bank. The cooling capacity in wet mode have been calculated with respect towet-bulb temperature (WBT) and cooling water to air mass flow rates for different spraywater volume flow rates and the results were compared to the experimental measurementand found to conform well for the air supply from the bottom end. The differences ofthe cooling capacity and pressure drop in between the CFD simulation and experimentalmeasurement in hybrid mode were less than 5 % and 7 % respectively for the uniform airflow distribution.
Numerical Simulation of the Performance Characteristics of the Hybrid Closed Circuit Cooling Tower
The performance characteristics of the Hybrid Closed Circuit Cooling Tower(HCCCT) have been investigated applying computational fluid dynamics (CFD). Widelyreported CFD techniques are applied to simulate the air-water two phase flow insidethe HCCCT. The pressure drop and the cooling capacity were investigated from severalperspectives. Three different transverse pitches were tested and found that a pitch of45 mm had lower pressure drop. The CFD simulation indicated that when air is suppliedfrom the side wall of the HCCCT, the pressure drop can be over predicted and the coolingcapacity can be under predicted mainly due to the non-uniform air flow distribution acrossthe coil bank. The cooling capacity in wet mode have been calculated with respect towet-bulb temperature (WBT) and cooling water to air mass flow rates for different spraywater volume flow rates and the results were compared to the experimental measurementand found to conform well for the air supply from the bottom end. The differences ofthe cooling capacity and pressure drop in between the CFD simulation and experimentalmeasurement in hybrid mode were less than 5 % and 7 % respectively for the uniform airflow distribution.
Numerical Simulation of the Performance Characteristics of the Hybrid Closed Circuit Cooling Tower
Sarker, M. M. A. (Autor:in) / Kim, E. (Autor:in) / Moon, G. C. (Autor:in) / Yoon, J. I. (Autor:in)
25.01.2008
doi:10.15388/NA.2008.13.1.14591
Nonlinear Analysis: Modelling and Control; Vol 13 No 1 (2008): Nonlinear Analysis: Modelling and Control; 89-101 ; Nonlinear Analysis: Modelling and Control; T. 13 Nr. 1 (2008): Nonlinear Analysis: Modelling and Control; 89-101 ; 2335-8963 ; 1392-5113
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
690
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