Public awareness of the need to reduce global warming and the significant increase in the prices of conventional energy sources have encouraged many countries to provide new energy policies that promote the renewable energy applications. Such renewable energy sources like wind, solar, hydro based energies, etc. are environment friendly and have potential to be more widely used. Combining these renewable energy sources with back-up units to form a hybrid system can provide a more economic, environment friendly and reliable supply of electricity in all load demand conditions compared to single-use of such systems. One of the most important issues in this type of hybrid system is to optimally size the hybrid system components as sufficient enough to meet all load requirements with possible minimum investment and operating costs. There are many studies about the optimization and sizing of hybrid renewable energy systems since the recent popular utilization of renewable energy sources. In this concept, this paper provides a detailed analysis of such optimum sizing approaches in the literature that can make significant contributions to wider renewable energy penetration by enhancing the system applicability in terms of economy.

Optimum design of hybrid renewable energy systems: Overview of different approaches

Uneconomical extension of the grid has led to generation of electric power at the end user facility and has been proved to be cost effective and to an extent efficient. With augmented significance on eco-friendly technologies the use of renewable energy sources such as micro-hydro, wind, solar, biomass and biogas is being explored. This paper presents an extensive review on various issues related to Integrated Renewable Energy System (IRES) based power generation. Issues related to integration configurations, storage options, sizing methodologies and system control for energy flow management are discussed in detail. For stand-alone applications integration of renewable energy sources, performed through DC coupled, AC coupled or hybrid DC–AC coupled configurations, are studied in detail. Based on the requirement of storage duration in isolated areas, storage technology options can be selected for integrated systems. Uncertainties involved in designing an effective IRES based power generation system for isolated areas is accounted due to highly dynamic nature of availability of sources and the demand at site. Different methodologies adopted and reported in literature for sizing of the system components are presented. Distributed control, centralized and hybrid control schemes for energy flow management in IRES have also been discussed.

A review on Integrated Renewable Energy System based power generation for stand-alone applications: Configurations, storage options, sizing methodologies and control

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Optimal planning and design of a renewable energy based supply system for microgrids

A review on recent size optimization methodologies for standalone solar and wind hybrid renewable energy system

Feasibility Study of Small Hydro/PV/Wind Hybrid System for off Grid Rural Electrification in Ethiopia

Integrated renewable energy systems for off grid rural electrification of remote area

Sizing of integrated renewable energy system based on load profiles and reliability index for the state of Uttarakhand in India

Development of IREOM model based on seasonally varying load profile for hilly remote areas of Uttarakhand state in India

Heat transfer augmentation of counterflow double-pass (DP) solar air heater (SAH) was investigated experimentally. Best artificial roughness was selected from previous work and it experimented with porous screen matrix of different porosity range from 0.74 to 0.9. Counterflow DP arrangement gives the best results with the combination of porous screen matrix. Correlations for Colburn factor, Nusselt number, friction factor, and thermal efficiency were developed over a wide range of geometrical configurations of porous media, i.e. wire diameters ranging from 1.06 to 1.4 mm, pitch ranging from 2.54 to 3.01 mm, and layer count ranging from 2 to 9. Correlations have been discovered to predict experimental values accurately. 

A.B. Kanase-Patil

Papers

Integrated renewable energy systems for off grid rural electrification of remote area

Sizing of integrated renewable energy system based on load profiles and reliability index for the state of Uttarakhand in India

Development of IREOM model based on seasonally varying load profile for hilly remote areas of Uttarakhand state in India

Heat transfer study of a double-pass counterflow solar air heater with porous media and multiple C-shaped roughness absorber

Comparative feasibility analysis of an integrated renewable energy system (IRES) for an urban area