Vol. 16 No. 1 (2001)

A two-stroke engine is one of the commonly used energy conversion systems for transportation.The process inside the cylinder and the transport passages can be simulated with mathematical models with certain assumptions. In modeling and simulating a two-stroke engine, the flows in the passages are modeled as unsteady gas flows. The unsteady gas flows are important in a twostroke engine since they affect the intake and exhaust processes of the working fluid. The results of the simulation can be used for analyzing or tuning the intake and exhaust passages of a two-stroke engine. As an example,…

This paper concerns on analysis of energy in drying operation, because energy is crucial and determines process efficiency throughout. Further, techno-economy is also studied for drying agricultural product, such as paddy, in a multi-stage deep-bed dryer with focussing in study two-stage one. Thermal and drying efficiency have been evaluated from experiment data. Moreover, the techno-economy in view of energy consumption for drying operation is also considered. The analysis shows that the increasing of bed height for constant drying air temperature will significantly increase thermal and…

This paper discusses theoretical and experimental study to determine the signature of stator supply current and stator vibration of 3-phase induction motor resulting from airgap eccentricity. Based on the theoretical study it can be formulated that the signature due to eccentricity is affected by number of slots on the rotor and the stator as well as slip, defined as "Principal Slot Harmonics (PSH)" and "Dynamics Eccentricity Components (DEC)". To study its feasibility for practical use a set of experiments was performed and the predicted signature was identified. Using the test rig, it was…

Angle sensor has been used in many systems demanding angle information of moving object. Angle sensor reported here has no damping as well as filtering system, therefore vibration information inherently in the construction of sensor will be included in the measured data. Algorithm in the intelligent control system will calculate the angle value separated from any vibration data, and the results have been compared to the ideal value where no vibration occurs during measurement.