Evaluation of Leasing Versus Purchasing Water Treatment Equipment for Cogeneration Projects PUBLIC ACCESS

[+] Author Affiliations
S. R. Gagnon

Process Equipment Unlimited, Londonderry, NH

H. A. Guidotti

Energy Services Inc., Farmington, CT

Paper No. 92-GT-037, pp. V004T11A001; 9 pages
  • ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration
  • Cologne, Germany, June 1–4, 1992
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7896-5
  • Copyright © 1992 by ASME


The need for high purity water for both water and steam injection into gas turbines has become more evident over the past twenty years. Changing environmental concerns and the need for highly trained personnel have prompted a closer look at permanently installed water treatment systems versus leased, mobile systems. Water availability, water quality, discharge limitations, and licensing have all become key issues in new system development.

Traditional permanently installed water treatment systems with on site regeneration of resins must now be evaluated against new options available to developers and operators of gas turbine installations. The leased mobile systems, as evaluated in this paper, are trailer mounted, self contained units, which will have all regeneration of resins done off site at the vendor’s facility. The units are under the direct control of the vendor, with the only responsibility of the site being the delivery of power and water to the trailers. For clarity, this paper will use the term “Permanent System” to refer to a traditional water treatment plant installation under the control of the plant, and the term “Mobile System” to refer to a leased mobile system under the control of the system vendor.

This paper will provide conceptual designs for water treatment systems at two sites, for both permanently installed and leased mobile water treatment systems. It will examine the cost impact that each option has on installation, operation and maintenance. Different modes of operation will be examined to determine the optimal system. The results of this optimization will consist of an illustration of equipment, operating cost, capital cost, and advantages and disadvantages of purchasing versus leasing.

This paper does not address the leasing of a permanent water treatment system in lieu of purchasing the permanent equipment outright, as that would merely be an exercise in financing options.

Copyright © 1992 by ASME
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