NALLAPANENI MANOJ KUMAR

The annual energy prediction and performance of 10 kW Roof Mount Photovoltaic System (RMPVS) with three different PV modules is studied under similar weather conditions with varying tilt angles as per building roof pitch. This study evaluates and compares the annual energy harnessed with the use of crystalline silicon and thin-film PV modules. Prior to practical installation, its feasibility is analyzed in National Renewable Energy Laboratory (NREL) software tool with an Indian solar resource data base. Monthly energy, annual energy and capacity factor of 10 kW RMPVS is analyzed for three different PV modules mounted at 20 degrees tilt angle on a roof surface. Further, the impact of tilt angle over the annual energy production of RMPVS is analyzed for three different PV modules. Results shows, thin-film performs best among other two crystalline silicon modules at tilt angles ranging from 18.4 - 45 degrees. The capacity factors of RMPVS with two crystalline silicon type and one thin-film type PV modules are 17.8 %, 18.5 %, and 19.3 % respectively.

Technical, economical, and environmental policies on global level led to the promotion of green energy technologies especially use of solar power in the present electricity sector. Due to which the scope for modeling and analysis of solar PV systems prior to practical installations became an essential part of the installers and service providers. In the view of such modeling and analysis, the necessity for the use of simulation tools for technical sizing of solar PV system is studied. This paper gives the study on the few selected simulation tools used for technical sizing and analysis of the Solar PV systems. The selected simulation tools include PV Watts, PVGIS, PV-Online, PV*SOL, PVsyst, System Advisor Model (SAM). Each software tools are discussed focusing on its basic info, simulation procedure, and data requirements. Also listed the benefits of using the proposed tools along with their comparisons.

Among all the renewable energy sources, solar energy has become more attractive and popular in Nigeria due to its non-exhaustible nature, less maintenance, no fuel cost etc. In recent years the use of solar energy in rural areas of Nigeria has grown drastically and it has become a sustainable solution for lighting and for pumping water. This paper clearly discusses the design, installation and economic viability of solar energy utilization with a case study on street lighting and water pumping. In addition to this maintenance of solar energy utilization systems is discussed.

In this paper a study on waste energy recovery in iron and steel industries is presented, the major by-products are heat energy, Blast Furnace Gas (BFG), Coke Oven Gas (COG) which are widely
vented to the atmosphere without proper utilization. On account of this, it is an important task for iron and steel industries to effectively utilize these by-products so as to reduce the impact of Green House Gas (GHG) emissions on the environment. On the contrary, the power generated through these by-products will replace the major quantity of electricity that could have been generated by burning fossil fuels in thermal power plants which are the major sources of GHG,
thus GHG emission reduction could be achieved. For effective emission reductions, it requires specially designed mechanical systems namely expansion turbines, pressure turbines, coke oven batteries and heat recovery which are used as a case to reveal the improved efficiency of energy and CO2 emission reduction approximately 6, 09, 874.5968 tCO2/yr.

Power generation using by-product gases of Iron
and Steel (I&S) industries is one of the most effective ways to
deal with the requirement of meeting the energy demand
challenge and also to reduce the Green-house Gas (GHG)
Emission concentration. Effective utilization of these by-product
gases is achieved by taking advantage of Green Technology using
a Top Recovery Turbine (TRT). TRT is used to effectively utilize
the top pressure of the Blast Furnace Gas (BFG) for power
generation and pressure control. This study shows, TRT project
activity is well suited for I&S industries to generate their own
green power to meet plant energy needs and also to mitigate the
environmental impact of by-product gases that are otherwise
vented without effective utilization.