A new cogeneration targeting procedure for total site utility system

As a head of design, the cogeneration targeting is necessary to optimal design of site utility in the process industries to estimate fuel demand, steam generation, steam used as well as production of heat and power. A new cogeneration targeting model that has been developed to estimate the cogeneration potential of site utility systems. The new procedure has been proposed here provides a consistent, general procedure for determining the mass flow rates and the efficiencies of the turbines used. This algorithm utilizes the relationship of the entropy with the enthalpy and the isentropic efficiency. Finally the new model allows targeting shaft work production and degree of superheat at steam boiler with high accuracy. It is superior to previous works in that it does not require cumbersome simulation for initiation and accurate. Also, this algorithm is simple, clear to understand with high computational efficiency and could be easily to provide computer code rather than simulation programs. Three case studies are used to illustrate the usefulness of the new cogeneration targeting method. (C) 2013 Elsevier Ltd. All rights reserved.