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DOE-2 Reference Manual Version 2.1 - DOE2.com

DOE-2 Reference Manual Version 2.1 - DOE2.com

DOE-2 Reference Manual Version 2.1 - DOE2.com

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ES-C:ENERGY SAVINGS, INVESTMENT STATISTICS, AND OVERALL LIFE-CYCLE COSTS.Energy SavingsThis section summarizes the annual energy use in 10 6 Btu at the siteand at the source for the baseline and for the present building.Investment StatisticsINVESTMENT THISRUNis the total investment associated with the presentbuilding. This number is the same as the total investmentin building components and plant equipment given in ReportES-B.The following quantities are meaningful only if baseline costs and energyuse have been specified.BASELINEREP LACEMENTCOSTSINCREMENTALINVESTMENTCOST SAVINGSRATIO OF SAVINGSTO INCREMENTALINVESTMENT (SIR)DISCOUNTEDPAYBACK PERIODRATIO OF LI FE-CY C LE EN E RGYSAVINGS (AT SITE)TO INCREMENTALINVESTMENTRATIO OF LIFE­CYCLE ENERGYSAVINGS (ATSOURCE) TOI NCREM ENTALINVESTMENTgives the present value of life-cycle replacement costsfor the baseline. This quantity is specified by thekeyword REPLACE-COST OF THE BASELINE instructions.is the INVESTMENT THIS RUN minus the sum of BASELINEREPLACEMENT COSTS and BASELINE FIRST COST.is the present value of the life-cycle savings in energyand operations costs. This number is also given in ReportES-A.gives dollars saved per dollar invested. It is theratio of COST SAVINGS and INCREMENTAL INVESTMENT. Ifthis ratio is greater than 1.0, the investment is costeffective.is the number of years it takes for the accumulatedcost savings to equal the incremental investment. Theshorter the payback period, the more cost effective is theinvestment.gives the life-cycle site energy saved (in units of10 6 Btu) per incremental investment dollar.gives the life-cycle source energy saved (in units of10 6 Btu) per incremental investment dollar.VI1.128 (Revi sed 5/81)

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