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Thermodynamic Assessment of the Components Comprising an Integrated System for Cogeneration and District Heating and Cooling


 In recent years, there has been increased interest in integrating systems for cogeneration, otherwise known as combined heat and power (CHP), and district heating and cooling. In this paper, a thermodynamic assessment is carried out of a proposed system, for which advanced engineering designs have been developed for integrating cogeneration with district heating and cooling. The system was developed by Edmonton Power for the city of Edmonton, Alberta, Canada. Energy and exergy analyses are used to attain a more complete thermodynamic understanding. The objectives of the work reported here are to develop a better understanding of the thermodynamic efficiencies and losses associated with the Edmonton System, and to establish generalized findings that may assist in efforts to improve the design of the Edmonton system and other related systems. The results are utilized, throughout the present investigation, of previous studies by the authors on (i) establishing the relevant thermodynamic principles relating to the integration of systems for cogeneration and district cooling, and (ii) developing measures of efficiency for such integrated systems.