Implementation of the Internet of Things for Monitoring the Companys Electrical Power Consumption

This research aims to design an electric panel monitoring system using the Internet of Things technology in company buildings so that consumers can monitor real-time electricity consumption. The energy consumption monitoring method that we propose uses PM2100 by implementing a real-time monitoring function of the power consumption of a 3-phase electric panel. The monitoring system implementation results show that the value is very close to measuring the digital multimeter measuring instrument. The monitoring system produces a current measurement accuracy of 97.38% with an error of 2.62%, while the 3-phase voltage measurement error is 0.616%. This system design helps companies obtain information faster to be considered data to improve efficiency in the Company.

Modeling Realistic Piston Skirts & I St Compression Ring Ehl in the Initial Engine Startup

The automobile manufacturers aspire to improve the engine design and enhance its life apart from optimizing the energy usage in the actual engine operation. A major concern at the time of the initial start up at the low loads and speed conditions is the wear of an engine. A significant proportion of the engine life gets compromised due to the adhesive engine start up wear. The start up wear does not exist during the normal engine operation due to the fully established elastohydrodynamic lubricating (EHL) film between the interacting surfaces of the piston assembly and the cylinder liner at the high loads, speeds and the optimum piston-to-bore radial clearances. Such arrangements do not exist in a few initial engine start up cycles. Resultantly, the piston skirts and the 1 st compression ring establish a physical contact with the liner and adhesive wear occurs. This PhD research work numerically models the lubrication of the piston skirts and the 1 st compression ring in the initial engine start up. The 2-D hydrodynamic and EHL models of the piston skirts are developed in the initial engine start up conditions. The initial engine start up conditions cover the secondary transverse piston displacements and the different start up speeds, radial clearances & viscosity-grades of an engine lubricant. The realistic aspects include the isothermal & adiabatic conditions, the steady-state and transient conditions, the Newtonian and non-Newtonian engine lubricant behavior, the surface roughness factors of the piston skirts and the liner. These aspects are modeled, studied and analyzed separately as part of the hydrodynamic and EHL models of the skirts. The 1-D and the 2-D steady-state isothermal Newtonian lubrication models of 1 st compression ring are developed as applicable to the initial engine start up conditions. The simulation analysis are studied to optimize the different realistic aspects/characteristics in an effort to reduce the engine start up wear.