Differential Transformation Method for Thermal Analysis of Trapezoidal Fins under Sensible and Latent Heat Transfer

نوع: Type: thesis

مقطع: Segment: masters

عنوان: Title: Differential Transformation Method for Thermal Analysis of Trapezoidal Fins under Sensible and Latent Heat Transfer

ارائه دهنده: Provider: jalal maleki kamari

اساتید راهنما: Supervisors: Habibollah sayevand

اساتید مشاور: Advisory Professors:

اساتید ممتحن یا داور: Examining professors or referees: Dr Mohsen goodarzi and Dr fazlolah eskandari

زمان و تاریخ ارائه: Time and date of presentation: 9/3/2022 - 14-16

مکان ارائه: Place of presentation: virtual

چکیده: Abstract: The aim of this study is to perform an analytical solution to determine the performance of trapezoidal fins under wet surface conditions in terms of temperature dependence of the thermal conductivity of the fin material. The thermal performance of the fin is analyzed by the Differential transformation (DTM) method to dehumidify the environment by the fin surface. The mass transfer process is calculated by considering the moisture ratio ω as a polynomial function of the surface temperature of the fin T, where, the relationship between ω and T is determined using a psychometric chart. The effect of wet surface and temperature variable coefficient of thermal conductivity as well as fin efficiency have been investigated. The results showed that the DTM corresponds to the result obtained from the numerical method with high accuracy. In addition, the efficiency of the fins decreases with increasing the Z_0 parameter of the fin, and the efficiency of wet fins does not change significantly with relative humidity. However, as the Z_0 fin parameter increases, it amplifies slightly. Also, the profile of fins with higher values of A (A in trapezoidal fins, the dimensionless parameter is the widening ratio), has a greater effect of variable thermal conductivity on the fin efficiency. This trend also depends on the value of Z_0

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