Electrical Engineering Section

Hyderabad andhra Pradesh, India

Electrical Engineering Section

Hyderabad andhra Pradesh, India
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Khan M.F.,Electrical Engineering Section
2016 - Biennial International Conference on Power and Energy Systems: Towards Sustainable Energy, PESTSE 2016 | Year: 2016

High (more than three) phase self-excited induction generators (SEIGs) are evoking lots of interest amongst researchers off late. This may be attributed to better stability and reliability of these machines in general. This paper presents the study of a six phase self-excited induction generator (6Ph-SEIG) operating with optimum excitation capacitances. For this purpose detailed mathematical modeling of a six phase SEIG and its implementation in Simulink is achieved. Extraction of magnetizing characteristic and evaluation of optimum excitation capacitance are explained through conducted experimental investigation. The paper is concluded by reporting no-load voltage profile of six phase SEIG in the present case. An open stator winding, 2.2 KW induction machine connected for six phase operation is utilized for the analysis. © 2016 IEEE.


Veeraboina P.,Electrical Engineering Section | Guduri Y.,Osmania University
Environment, Development and Sustainability | Year: 2014

In the present study, a natural circulation thermosyphon flat plate solar water heater has been tested at the CDFD, Hyderabad (17.37°N, 78.43°E) Andhra Pradesh, India. Experimental data were noted on a sunny day. Dynamic response of the system to variations in solar insulation was studied and analyzed. Tinlet °C and Toutlet °C temperatures were recorded. The performance of the system can be improved by using aluminum tape inserts into the collector fins. The objective of the present study is to evaluate the performance of flat plate collector with and without inserts (aluminum strip of 1 mm thick, 3 mm width and 203 mm length). It is expected that with the same collector with the same flow rate, higher efficiency can be obtained by inserting the tapes inside the collector copper fins (9 mm). Thus, the cost of the system can be further bringing down by enhancing the collector efficiency. © 2014, Springer Science+Business Media Dordrecht.


Veeraboina P.,Electrical Engineering Section | Yesuratnam G.,Osmania University | Sundar L.S.,Jawaharlal Nehru Technological University Anantapur
Sustainable Cities and Society | Year: 2011

This paper intends to present the methods of monthly mean daily solar radiation estimation using Temperature-based approach. The main objective of this paper is to estimate the potential of monthly solar radiation using air temperatures at three cities of Andhra Pradesh, India. Solar radiation is the principal, fundamental and abundantly available energy for many physical, chemical and biological processes. However, it is measured at a very limited number of meteorological stations in the world. Since the temperature is probably the most registered meteorological variable, correlation models based on air temperature data are especially interesting to estimate monthly average values of solar irradiation in countries with lack of direct measurements. Measured long-term monthly air temperatures including maximum (Tmax) and minimum temperatures (Tmin), were gathered from meteorological stations and analyzed. Three combinations of air temperatures, namely T max, Tmin, and Taveg were served as inputs. The approach in this present paper seems to be adequate to the data for a region with a diverse orography on the eastern Indian coast obtained from meteorological stations supported by their web site in India. Results: The methodology has also been applied to three city stations in order to check the procedure in places with different latitude, longitude and attitudes. © 2011 Elsevier B.V. All rights reserved.


Veeraboina P.,Electrical Engineering Section | Yesuratnam G.,Osmania University
Sustainable Cities and Society | Year: 2014

India has the most developed renewable energy markets and has the highest energy intensities in Asia. Very little investment and priority are being given to increase of the efficiency. On the other hand, the India has a high potential for developing energy production from renewable energy sources (RES) like solar, water, wind and biomass. However, these potentials are not studied and exploited enough and the present situation for their utilization is not so good. Although energy is a critical foundation for economic growth and social progress of any country, there are many constraints for RES development in all of them (political, technological, financial, legislative, educational, etc.). Obviously, defining development strategies and new support measures are necessary since renewable energy sources can make an important contribution to the regional energy supply and security. The main purpose of this paper is to explore the solar energy harvesting and opportunities in India. In this paper, efforts have been made for cost analysis, payback period calculations, current potential status, promotion policies, targets, major milestones and future of solar energy potential contribution and plans in India. © 2014 Elsevier B.V.


Veeraboina P.,Electrical Engineering Section | Yesuratnam Guduri G.,Osmania University
Sustainable Cities and Society | Year: 2014

Solar energy technologies offer a clean, renewable and domestic energy source, and are essential components of a sustainable energy in the future. This paper presents the comparison of yearly mean daily solar radiation using temperatures of different cities in Andhra Pradesh, India from April 2010 to March 2012. The main objective of this paper is to comparing the potential of monthly solar radiation using air temperatures at three cities (Hyderabad-17.37 N, 78.43 E, Vishakhapatnam-17.7 N, 83.4 E and Anantapur-14.6 N, 77.6 E) of Andhra Pradesh, India. Solar radiation is the principal, fundamental and abundantly available energy for many physical, chemical and biological processes. However, it is measured at a very limited number of meteorological stations in the world. Proper and adequate information on solar radiation and its components at a given location is very essential in the design of solar energy systems. Since the temperature is probably the most registered meteorological variable, correlation models based on air temperature data are especially interesting to compare monthly average values of solar irradiation in countries with lack of direct measurements. The Hargreaves equation was used to estimate the solar radiation. Measured long-term monthly air temperatures including Tmax and Tmin, were gathered from meteorological stations and analyzed. Three combinations of air temperatures, namely T max, Tmin, and Tave were served as inputs. The approach in this present paper seems to be adequate to the data obtained from meteorological stations supported by organizations web site in India. The Vishakapatnam weather conditions are entirely different because of a diverse orography on the eastern Indian coast than other cities. © 2013 Elsevier B.V. All rights reserved.


Veeraboina P.,Electrical Engineering Section | Yesuratnam G.,Osmania University
International Journal of Energy Technology and Policy | Year: 2013

Energy efficient buildings consist of using innovative technologies based on renewable energies and a good thermal insulation. Most strategies applied in design and many of the services offered by lodging establishments require the consumption of substantial quantities of energy, water and non-durable products. In most developing countries, it makes perfect sense to focus on the implementation of energy efficiency on new buildings rather than on retrofitting existing ones (Hinostroza et al., 2007). Energy efficiency in new buildings can be achieved by passive measures such as the insulation of the building envelope, optimised solar design, optimised natural lighting, wall shading, surface material etc. and active measures such as efficient cooling and ventilation appliances and solar water heating. In this paper, the effects of thermal mass and phase change material on building cooling and heating loads and peak loads, air tightness and infiltration of building envelopes are discussed. Copyright © 2013 Inderscience Enterprises Ltd.

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