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1.0 Introduction to the Problem: Considerable confusion appears to exist with respect to the definition of the efficiency (å) of an energy system or energy process versus the definition of its coefficient of performance (COP). Thus, the purpose of this paper is to show the distinction and the relationship between these two important concepts. 2.0 Assumptions: For the development of this problem the following definitions are needed to clarify the energy flow concepts necessary for a logical understanding of the thermodynamic energy processes involved: a) An energy process is an entity that accepts input energy, transforms or converts the energy to a different form (producing work), and outputs useful energy. b) An energy system is a set of two or more energy processes, operating in series and/or parallel, such that the final output is useful energy. c) An energy system or energy process may be in equilibrium with its environment (i.e. energy input from environment equals energy output to environment) or far from equilibrium with its environment (i.e. energy input from environment differs from energy output to environment). [Note: Hereafter, the word "system" shall be used for "system or process".] To subscribe, send a message to: [EMAIL PROTECTED] Or go to: http://groups.yahoo.com/group/FairfieldLife/ and click 'Join This Group!' Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/FairfieldLife/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/FairfieldLife/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
