In this study, the effects of thermal and hydraulic characteristics of wavy fin and tube heat exchanger are investigated. Simulation has been carried out by a commercial computational fluid dynamics code, ANSYS CFX12.0. The main objective of this study is to investigate the flow characteristics in turbulent flow. Results are predicted for the turbulent flow regime (2100≤Re≤7000) and compared wi...

In case of automobile the fuel saving is the prime important with minimum emission and best performance. The phenomenon by which heat transfer takes place through engine fins must frequently be improved for these reasons. Air-cooling used to reduced weight and simple in construction of engine cylinder block. So,air-cooled engine build heat, the cooling fins permit the wind and air to move the h...

This study explores the endothermic dehydriding (desorption) reaction that takes place in a high-pressure metal hydride (HPMH) hydrogen storage system when hydrogen gas is released to the fuel cell. The reaction is sustained by circulating warm fluid through a heat exchanger embedded in the HPMH powder. A systematic approach to modeling the dehydriding process is presented, which is validated a...

A mathematical model describing the behaviors of current commercialized silica gel-water adsorption chillers is presented in this study. Comparing with the previous study, this model comprises (i) a realistic representation of the thermal mass of the associated piping materials and fins; (ii) a distributed modeling of the reactor bed for the sorption processes. The model is demonstrated on a tw...

This investigation is a three dimensional comprehensive heat transfer analysis for partially differentially heated enclosure with the vertical fin mounted on the hot wall. The thermal lattice Boltzmann based on D3Q19 method is utilized to illustrate the effects of vertical fins and nanoparticles on the flow and thermal fields. The effects of Rayleigh number and different arrangement of fins on ...

A-Type heat exchangers are used to meet required heat load with minimum duct dimensions in air-conditioning applications. This greatly reduces the air-conditioning system footprint in residential and commercial applications. The angle and tube spacing of the A-type heat exchangers should be optimized for minimum duct size and maximum heat load. However, existing air side heat transfer and press...

© Springer Science+Business Media Dordrecht 2016 C.-M. Kyung (ed.), Nano Devices and Circuit Techniques for Low-Energy Applications and Energy Harvesting, KAIST Research Series, DOI 10.1007/978-94-017-9990-4_2 Abstract In contrast to conventional 2-D MOSFETs, FinFETs are able to be scaled down to 20 nm and beyond, and have superior performance. There are two types of FinFETs:SOI FinFETs and bul...

the objective of this paper is to present a design procedure for compact plate-fin heat exchangers based on full utilization of pressure drop. since, design engineers need to indices for optimum selection of plates, an appropriate  index   is   developed  and   then based on the rapid design algorithm, developed by previous investigators, the best enveloped has been modified.  the developed ind...