Abstract
Vortex generator is a method to enhancing of heat exchanger performance but still have some disadvantages when the heat transfer performance increase. One of the disadvantage using vortex generator is high pressure drop. This investigation will be compared three type vortex generators to result the overall performance of heat transfer around tube in plate fin heat exchanger. The three types of vortex generator to investigate are rectangular winglet type, delta winglet type, and trapezoidal winglet type in laminar flow. The result showed that using the kind of trapezoidal winglet pair type in the plate fin and tube heat exchanger consist of six rows of round tube with two neighboring fins form a channel better performance than two types vortex generators such as rectangular winglet type and delta winglet type. The heat transfer coefficient when use trapezoidal winglet type was increased almost same with rectangular winglet type and pressure drop was decreased more than delta winglet type.
Highlights
IntroductionIn many industrial areas, such as chemical and food process, automobile, power plant, HVACR (heating, ventilating, air conditioning and refrigeration), and petrochemical process, heat exchangers are devices used to improve energy efficiency and heat transfer enhancement
In many industrial areas, such as chemical and food process, automobile, power plant, HVACR, and petrochemical process, heat exchangers are devices used to improve energy efficiency and heat transfer enhancement
The use of RWPs generated the highest performance because it had the most extensive heat transfer surface while producing the most powerful longitudinal vortices compared to the use of DWPs and TWPs [7]
Summary
In many industrial areas, such as chemical and food process, automobile, power plant, HVACR (heating, ventilating, air conditioning and refrigeration), and petrochemical process, heat exchangers are devices used to improve energy efficiency and heat transfer enhancement. One of methods of improving heat transfer performance is by using vortex generators. Vortex generators can increase the enhancement heat transfer but it can’t loss additonal penalty in the pressure drop [2]. Vortex generation is a new method of enhancing air-side heat transfer. Vortex generators such as wing and winglet can introduce vortices into flow around fin and tube heat exchanger, causing heat transfer enhancement. Vortices are generated when fluid flow through vortex generators and due to the friction and separation on the edge of the vortex generator [3]
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