DOE-2 Reference Manual Version 2.1 - DOE2.com

As an example, if three 100-ton one-stage absorptionchillers are to be installed, and a maximum of two can beused simultaneously, and the user decides to name aPLANT-EQUIPMENT instruction "CHILLERS-l" the entry would be:FIRST-COSTCHILLERS-l ; PLANT-EQUIPMENT TYPE; ABSOR1-CHLRSIZE; 1.2INSTALLED-NUMBER; 3MAX-NUMBER-AVAIL ; 2 •.specifies the first cost for one unit of the type and sizereferenced above, not including installation costs.This cost must be entered in dollars referenced to the samepoint in time as all other input. For example, if energycosts refer to January 1979, this cost must be converted toJanuary 1979 dollars before it is entered regardless of theactual expenditure date. If the money is spent beforestart up and operation, the present value is increased bythe lost opportunity value over the time interval betweenspending and start up.The PLANT program is not capable of calculating thisincreased value. The user is required to calculate thisincreased value before entering the cost. This is thepresent value of the cost and it may be approximated by thefollowing equation:where: Cp ; present value of cost,vC r ; cost in reference dollars,D ; real discount rate in per centper time interval, andN ; number of time intervals from expenditureto start up.INSTALLATIONCONSUMABLESspecifies the multiplier on equipment FIRST-COST toestimate first cost per unit installed. For example, ifinstallation cost is 20 per cent of first cost, thenINSTALLATION; 1.2.specifies the cost (in $ per operating hour per unit) ofthose items consumed during operation (excluding primaryfuel). For example, diesel fuel for an engine is not underthe consumable category, but lubricating oil is.V.13 (Revised 5/81)