Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Cost Estimating of Electricity and Steam on a Gas-Turbine Cogeneration

가스터빈 열병합발전에서 생산된 전기와 증기의 원가산정

  • Published : 2009.04.10
Download PDF
⟨ Previous Next ⟩

Abstract

When various kinds of outputs are produced from a single energy system, the methodology which allocates the common cost to each output cost is very important because it is directly related with the profit and loss of producers and purchasers. In the cost allocation methodology of the heat and the electricity on a cogeneration, there are energy method, work method, proportional method, benefit distribution method, various exergetic methods, and so on. On the other hand, we have proposed a worth evaluation method which can be applied to any system. The definition of this methodology is that the unit cost of a product is proportion to the worth. Where, worth is a certain evaluating basis that can equalize the worth of products. In this study, we applied this methodology to a gas-turbine cogeneration which produces 119.2 GJ/h of electricity and 134.7 GJ/h of steam, and then we allocated 3,150 $/h of fuel cost to electricity cost and steam cost. Also, we compared with various cost allocation methods. As the result, we conclude that reversible work of various kinds of worth basis evaluates the worth of heat and electricity most reasonably.

Keywords

References

  1. Carolyn, G., 2003, Regulation of heat and electricity produced in combined-heat-and power plants, The world bank, Washington, D. C
  2. Lozano, M. A. and Valero, A., 1993, Theory of the exergetic cost, Energy, Vol. 18, No. 9, pp. 939-960 https://doi.org/10.1016/0360-5442(93)90006-Y
  3. Valero, A., Lozano, M. A., Serra, L., and Torres, C., 1994, Application of the exergetic cost theory to the CGAM problem, Energy, Vol. 19, No. 3, pp. 365-381 https://doi.org/10.1016/0360-5442(94)90116-3
  4. Bejan, A., Tsatsaronis, G., and Moran, M. J., 1996, Thermal design and optimization, Wiley, New York
  5. Tsatsaronis, G. and Pisa, J., 1994, Exergoeconomic evaluation and optimization of energy systems-application to the CGAM problem, Energy, Vol. 19, No. 3, pp. 287-321 https://doi.org/10.1016/0360-5442(94)90113-9
  6. Lazzaretto, A. and Tsatsaronis, G., 2006, SPECO : a systematic and general methodology for calculating efficiencies and costs in thermal systems, Energy, Vol. 31, No. 5, pp. 1257-1289 https://doi.org/10.1016/j.energy.2005.03.011
  7. Oh, S. D., Pang, H. S., Kim, S. M., and Kwak, H. Y., 1996, Exergy analysis for a gas turbine cogeneration system, Journal of Engineering for Gas Turbine and Power, Vol. 118, pp. 781-791
  8. Kim, S. M., Oh, S. D., Kwon, Y. H., and Kwak, H. Y., 1998, Exergoeconomic analysis of thermal systems, Energy, Vol. 23, No. 5, pp. 393-406 https://doi.org/10.1016/S0360-5442(97)00096-0
  9. Kim, D. J., 2003, Suggestion of power and heat costing for an energy system, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 15, No. 5, pp. 360-371
  10. Kim, D. J., 2008, A new cost allocation method on the multi-products of energy systems, Report of Enecos Inc. Available on : www.enecos.com
  11. Kim, D. J., 2008, Cost allocation of heat and electricity on a steam-turbine cogeneration, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 20, No. 9, pp. 624-630
  12. Kim, D. J., 2008, A suggestion for the worth evaluation of warm air and the allocation methodology of heating cost, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 20, No. 10, pp. 654-661