Paper Title

ANALYTICAL MODELING AND SIMULATION OF HEAT TRANSFER IN COMPACT HEAT EXCHANGERS WITH NANOFLUIDS

Abstract

Colloidal suspensions of antiparticles in a base fluid such as water, oil, or ethylene glycol are what we call nanoseconds. These intelligent fluids have the potential to significantly improve upon the functionality of standard HT media. By analyzing the synthesis of nanoseconds, the assessment ir thermostatically characteristics, and the heat transmission and pressure of nanoseconds in a tube under CHF condition, this study hopes to shed light on the topic of nanoseconds. In the laminar regime, we have explored three distinct nanoseconds: aluminium oxide/water, copper oxide/water, and a mixture two. Computers, car engines, and high-powered lasers are just some many goods that benefit from cooling systems. Single-phase liquid cooling techniques, such as micro-channel heat sinks, and two-phase liquid cooling techniques, such as heat pipes, thermosphere, direct immersion cooling, and spray cooling, have recently developed for chip or package level cooling. However, continuing miniaturization has increased heat loss and inherent poor thermal conductivity, which has impeded the development of energy-efficient HT fluids necessary for ultrahigh-performance cooling in subsequent product generations. As a result, the cooling challenge will intensify across a wide range of industries, from electronics and phonics to transportation, power generation, security, and healthcare.
KEYWORDS : nanostructured materials, high-powered laser, energy-efficient HT fluid, micro-channel heat sinks, HT media, aluminium oxide/water, copper oxide/water, CHF condition.

Paper Title

MODELING AND SIMULATION OF AGC SYSTEMS FOR EFFICIENT LOAD FREQUENCY CONTROL IN RESTRUCTURED HYDRO-THERMAL POWER PLANTS

Abstract

In an electric power system, automatic generation control (AGC) is a system for balancing the power output of multiple generators at different power plants, in response to changes in the load. In an interconnected power system, fluctuations in frequency caused due to load variations and penetration of renewable resources. Load variations occur in either one area or all areas of the system causes change in system frequency and tie line power. Due to high frequency deviation in interconnected power system could result in system collapse. Load frequency control is one of the most efficient method to solve these kinds of problems. In the proposed method a three-area system is considered i.e., area-1 with thermal power plant, area-2 with hydro power plant and area-3 with distributed generation (i.e., wind power plant, solar power plant etc.). In order to analyze the performance of a three-area system, the system responses are comparing the values of undershoot and settling time for each case using conventional control and Fuzzy logic control techniques separately for 1% disturbance in either area. Load frequency control (LFC) including conventional controller is proposed in order to suppress frequency deviations and area control error (ACE) for a power system involving wind, hydro and thermal plants. A three-area system involving thermal plants, a wind farm and a hydro plant will be modeled using MATLAB. The controller performances are simulated using MATLAB/SIMULINK simulation software.
KEYWORDS : Load frequency control (LFC), automatic generation control (AGC), area control error (ACE).

Paper Title

IMPROVING QUALITY AND EFFICIENCY IN DIE CASTING OF COMPLEX HOUSINGS

Abstract

In order to provide ecological balance, new technologies are being developed to reduce fuel consumption. Within these new technologies, usage of light alloys such as aluminum and magnesium has gained great importance in the automotive applications. The advantages of aluminum alloys in terms of light weight, recycling, machinability and corrosion resistance led to increase application area of these alloys. Due to these characteristics of aluminum alloys, fuel-saving light-weight material selection plays an important role for automotive parts. Aluminum applications increase not only in automotive, but also in aerospace, space shuttle, marine, and defense applications. According to the production methods, aluminum alloys are generally classified as casting, sheet, forging and extrusion. Aluminum die casting alloys are generally used the production of suspension systems, engines and gears parts. However, with the developing aluminum casting technologies, the aluminum die casting method makes it possible to manufacture multiple body parts in one piece. It is predicted that number of aluminum die casting parts will increase, especially in electric vehicles. In this study, the importance of the use of aluminum die casting alloys in the automotive industry is emphasized. Research and trends so far of the development of aluminum die casting alloys are also summarized.
KEYWORDS : Light weighting, Aluminum casting alloys, Fuel consumption