Patent Document ID: 9201411
Application ID: 13646645
Patent Flag: 1

Claim One:
1. A method to manage energy efficiency of a microgrid, comprising: generating a comprehensive cooling, heating, and power (CCHP) microgrid model; generating a model for converting organic waste to energy; performing on a computer multi-objective optimization to manage system efficiency of energy utilization and reduce environmental problems caused by organic wastes and to optimize microgrid operation; displaying results of the optimization for review; modeling distributed energy resources and grid connections; and modeling energy storage systems (ESS) as follows: e ess , t = ( 1 - φ ess ) ⁢ e ess , t - 1 + τ ( p ess , t chg ⁢ η ess chg - p ess , t dch η ess dch ) , where e ess,t , φ ess , and τ represent energy storage level at time t, energy loss, and the time interval in hours, respectively and p ess,t chg , η ess chg , p ess,t dch , and η ess dch represent charging and discharging power and efficiencies of the ESS, respectively; wherein modeling operational and maintenance costs of ESS includes its degradation costs is assumed to be proportional to the number of charging and discharging cycles, as follows: 
 C ess,t =C ess dg ½( v ess,t chg +v ess,t dch )+τ C ess om Ē ess,t , where C ess om denotes constant maintenance costs and C ess dg represents degradation costs of the ESS per cycle which can be calculated based on the total number of charging and discharging cycles of the ESS from manufacturer data and its replacement costs, v ess,t chg and v ess,t dch represent start up flags for the charging and discharging modes, respectively, defined as follows: 
 v ess,t chg ≧u ess,t chg −u ess,t−1 chg , 
 v ess,t dch ≧u ess,t dch −u ess,t−1 dch , where v ess,t chg and v ess,t dch represent start up flaps for the charging and discharging modes, respectively.