Advanced Materials Research Vols. 984-985

Abstract: A massive deployment of solar thermal technology is required in those industries which use large quantities of low temperature hot water for the economic operation. With the rise in fuel cost and scarcity now, there is a significant research, development and application in solar industrial process heating. Due to the unavailability of solar energy during non sunny days and diurnal changes throughout the day, storage of thermal energy is inevitable. Recent developments nationally and internationally may rekindle new applications of solar thermal energy use by industry. This paper reviews the application of solar industrial process heating in paper industry.

Abstract: Nowadays, renewable energies have been widely applied to achieve eco friendly objectives. This paper presents the development of a single-phase grid-connected wind energy generation with the improvement in power quality and efficiency. This mainly focuses on showing the improvement in power quality by overcoming the drawbacks with the existing wind energy generation based on the PLL with the discrete PI controller. It is found that Total Harmonic Distortions (THD) present in PLL Single-phase grid-connected wind energy generation can be reduced by using modified PLL method. The modified wind energy generation is based on PLL with Fuzzy logic controller instead of PLL with discrete PI controller. The PLL gets input from the load side, and compare with any one parameters current or voltage (closed loop system). The aim of this survey is to propose a new topology in (HCM) HILL CLIMB METHOD. The tasks related to the SVPWM algorithm, the PLL, the MPPT algorithm, and the monitoring of the DC voltage were successfully implemented in the DSC. Keywords – Total Harmonic Distortions, Phase Locked Loop, Discrete PI Controller, Fuzzy logic controller, Space Vector Pulse Width Modulation, Maximum Power Point Tracking, Digital Signal Controller.

Abstract: This project presents the analyzed results of an integrated offshore wind and seashore wave farm fed to an onshore power grid through a unified power flow controller (UPFC) to simultaneously achieve power-fluctuation mitigation and stability improvement. A damping controller of the proposed UPFC is designed by using modal control theory to render adequate damping characteristics to the studied system. A frequency-domain scheme based on a linear system and a time-domain scheme based on a nonlinear system. From time domain analysis, the UPFC is designed. The proposed UPFC joined with the designed damping controller can effectively stabilize the studied integrated OWF and SWF under various interruption conditions. The fluctuated power injected in to the power grid can also be effectively mitigated by the proposed control scheme.

Abstract: —Hybrid power system consists of different sources of electrical energy with different operating times during different seasons. Deployment of a hybrid power system is expected in rural areas. Supplying remote load systems such as rural telephony, hospitals, military etc.., where continuous power supply is required, can be realized with the combination of wind and solar power. The proposed topology is designed for telecom load which uses dual input dc-dc fused converter for combining solar and wind energy sources. For the further research and improvements in the proposed fused converter topology, it is necessary to know in detail the power flow from solar and wind sources to the load or to storage battery depending on different seasons. For various wind speed with constant solar irirradiation and, for various solar irirradiations with constant wind speed, the power flow of the hybrid power system is simulated and presented. The same topology is investigated for different switching frequencies (10 kHz and 20 kHz), using MATLAB/SIMULINK, and the efficiencies are calculated.

Abstract: The world is going through a very tough situation in terms of environment pollution. Many of the activities of human are creating huge pollution in the entire world. The weather and climate have been changing continuously due to a wide range of human factors. This emission of Greenhouse gases increases the atmospheric temperature gradually. This paper provides a critical perspective to the debate on various greenhouse gas emission in the world. This paper consists of three major areas of discussion. First part of the discussion is with Trends in global CO2 emission second part is global CO2 emission by sector. The last part of the discussion is the potential alternate option to reduce this Gas emission and its concerns for growth focus is discussed for further research. Most of the research papers focused about the solution to the reduction of greenhouse gas emission. Furthermore, in this paper I have focused on the review of Indian wind industries model and its major constraints faced by a wind turbine manufacturer. The result of this research paper is a solid base for further research on which parameter to be focused so that this industry can grow.

Abstract: Due to the enormous increase in the power system load the conventional power generation plants never satisfy the power demand. So the power generating sectors turn into renewable energy sources. Wind power is a promising renewable energy source. It is necessary to determine the optimal dispatch scheme that can integrate wind power reliably and efficiently. In this paper GA and PSO algorithm are used to perform ED considering wind power generation and valve effect of thermal unit. The proposed method is validated with three and six unit test system. The results show the performance comparison of the two methods for solving the wind thermal dispatch problem.

Abstract: The micro wind power generation system is used to generate the power at low cost. In this paper, generator fed SEPIC, Z source inverter based systems are presented. The unique feature of Z source inverter is shoot-through duty cycle control by which any desired output voltage even greater than input line voltage is possible. Both buck-boost capabilities in single stage conversion are possible. This is not possible in conventional inverters. Also conversion losses are reduced in Z-source inverter due to single stage conversion which increases the output voltage of the system. Keywords: micro-wind power generation system, Single-Ended Primary Inductor converter, Z source inverter.

Abstract: Abstract -While constructing the geothermal cogeneration plant the success of the projects depends upon its financial and market feasibility. A new optimization method is used to estimate financing requirements of investment projects will be presented, as well as a new method to predict the optimal year to sell the investment. A case study is used to illustrate the use of a model to assess the financial feasibility of a geothermal cogeneration plant. The conclusion is that Net Present value , Internal rate of Return and Modified Internal rate of Return should be used to assess financial feasibility of investment projects. In addition to calculating the financial feasibility criteria, assessment models should allow the user to perform sensitivity analysis, scenario analysis, and simulation to analyze risk associated with the investment project. Risk probability matrix is used to obtain the risk priority , which then continued with financial analysis for the feasibility study and also sensitivity analysis. The study shows that the parameter investment value will be increased when treatment is done on risk. Keywords: Financial and market feasibility, Geo thermal cogeneration plant, Environmental Aspects, Sensitivity analysis.

Abstract: In order to reduce the entry of moisture, salt, sand and other external contaminations into the nacelle and also to reduce the fan noise which reaches the exterior, in this work a study of an innovative cooling system for off-shore wind turbine has been carried out. The new cooling technique is based on the use of nanofluids (engineered colloidal suspensions of nanoparticles in a base fluid). Nanofluids allow to increase the thermal conductivity of fluids and so to reduce the heat exchange surface and the heat transfer fluid flow rate due to the increased heat capacity. To reduce the amount of nanofluids circulating in the cooling system, the performance of a two-stage cooling circuit has been investigated. The first circuit takes the heat out of the generator and of the accessories whereas the second circuit, coupled with the first via an heat exchanger, dissipates the heat into the ambient. For the second circuit two options have been investigated. In the first solution the waste heat is dispersed using the tower as dissipator whereas in the second option the waste heat is exchanged with a titanium heat exchanger using marine water as heat transfer fluid.Both solutions assure high efficiency of heat exchange, long technical life expectancy and limited maintenance requirements.Keywords: Wind turbine, nanofluid, cooling system.

Abstract: This paper presents the modeling of PMSG based wind energy conversion systems (WECS) using MATLAB Simulink. This model contains the wind turbine, PMSG, diode rectifier, DC–DC converter (Buck – Boost) and SPWM based inverter. Due to the wind fluctuations, output voltage varies continuously. Buck - boost chopper can be controlled to maintain the constant dc voltage. The SPWM based inverter produces the constant output voltage with constant frequency for the stand alone load (Remote locations, Island, Hills Stations etc). The simulation results show that the developed model complies with the theoretical results. The PI controller maintains constant output voltage .