Optimal Heating Time for Cylindrical Items Removal from the Shaf
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2015, Vol 39, Issue 39
Abstract
For easy removal of cylindrical items from the shaft, they are heated on their external cylindrical surface for thermal dilatation. The best result is obtained if the temperatures gradient inside the item is highest on the separation surface. In the paper, considering a suddenly occurring constant high temperature on the external cylindrical surface of the homogeneous item, the shaft with the same thermal diffusivity and neglecting the contact thermal resistance, the transitory thermal field is analyzed and optimal time for item removal is determined. Example is given.
Authors and Affiliations
Grigore Cividjian
Virtual Synchronoscope for Connecting Synchronous Generator on the Grid
In this paper is presented in a constructive and functional way an instrument that can be used at connecting synchronous generators at the grid supply that has a constant voltage and frequency. Actually it is abou...
Modelling of Transformer Windings and Computation of Very Fast Transient Over-Voltages
The main objective of this paper is represented by analysis and modeling of the transformer windings stressed by over-voltage with direct impact on voltage distribution across the winding. The authors considered both app...
Numerical Determination of Inductance of a SMES Device Using the Response Surface Methodology Applied on FEM Modeling
The paper proposes the determination of the inductance of a Superconducting Magnetic Energy Storage (SMES) device with modular toroid coil based on a new 2-D FEM modeling using the response surface methodology (RSM...
The Online Temperature Control
In this paper is presented the hardware and software design of a remote controlled system which can have multiple destinations. In particularly, this system is used to create an online thermostat using a microcont...
Study of Low Power Alternating Current Motors by Functional and Energy Aspect
The objectives followed in the frame of this paper are to approach comparatively the two types of motors, from the view point of operation performances and of exploitation expenses obtained with them (asynchronous...