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Journal of Energy
Volume 2013, Article ID 712319, 8 pages
Research Article

Comparison of Technological Options for Distributed Generation-Combined Heat and Power in Rajasthan State of India

1Department of Mechanical Engineering, Kautilya Institute of Technology & Engineering, Jaipur Rajasthan 302022, India
2Department of Mechanical Engineering, Mody Institute of Technology & Science, Lakshmangarh, Sikar Rajasthan 332311, India

Received 28 February 2013; Revised 27 May 2013; Accepted 27 May 2013

Academic Editor: José L. Míguez

Copyright © 2013 Ram Kumar Agrawal and Kamal Kishore Khatri. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Distributed generation (DG) of electricity is expected to become more important in the future electricity generation system. This paper reviews the different technological options available for DG. DG offers a number of potential benefits. The ability to use the waste heat from fuel-operated DG, known as combined heat and power (CHP), offers both reduced costs and significant reductions of CO2 emissions. The overall efficiency of DG-CHP system can approach 90 percent, a significant improvement over the 30 to 35 percent electric grid efficiency and 50 to 90 percent industrial boiler efficiency when separate production is used. The costs of generation of electricity from six key DG-CHP technologies; gas engines, diesel engines, biodiesel CI engines, microturbines, gas turbines, and fuel cells, are calculated. The cost of generation is dependent on the load factor and the discount rate. It is found that annualized life cycle cost (ALCC) of the DG-CHP technologies is approximately half that of the DG technologies without CHP. Considering the ALCC of different DG-CHP technologies, the gas I.C. engine CHP is the most effective for most of the cases but biodiesel CI engine CHP seems to be a promising DG-CHP technology in near future for Rajasthan state due to renewable nature of the fuel.