DOE-2 Reference Manual Version 2.1 - DOE2.com

REPORT BEPS - ESTIMATED BUILDING ENERGY PERFORMANCEThe information in this report has been calculated and formatted to complywith the U.S. Department of Energy's. Building Energy Performance Standards.The report makes it possible to review quickly the building performance as afunction of site energy used (by type) per unit floor area. The breakdown ofusage of up to five different types of energy sources is presented. Theseenergy sources are user-specified through the ENERGY-COST and PLANT-PARAMETERSinstructions.HVAC auxiliary (shown as HVAC AUX) is defined as the energy required tooperate non-solar fans, pumps, etc., which transport the conditioned air andwater. AUX SOLAR is the energy required to operate the fans, pumps, etc. thattransport the conditioned water or air associated with solar equipment. SPACECOOL and SPACE HEAT includes all equipment required to produce the conditionedwater or air for SPACE heating or cooling.Process and domestic hot water (shown as DOM HOT WTR) is the summation ofthe user input for hot water in the BUILDING-RESOURCE instruction and anyentries for SOURCE-TYPE = HOT-WATER in the SPACE-CONDITIONS instruction.Vertical transportation (shown as VERT TRANS) is the summary of energy forelevators and escalators input through the BUILDING-RESOURCE instruction.Loads that are input through the SOURCE-TYPE = GAS or SOURCE-TYPE =ELECTRIC in the SPACE-CONDITIONS instruction will appear in this report asmiscellaneous equipment (shown as MISC EQUIP). Loads entered as SOURCE-TYPE =PROCESS are assumed to have energy sources independent of the buildingutilities (i.e., wood stoves, acetylene welders, etc.) and are not reported inthe BEPS report.The distribution of ENERGY TYPE among the CATEGORY OF USE items is exactfor every type of energy except electricity. Purchased electricity isapportioned correctly, but electricity generated on-site is apportioned on thebasis of net yearly demands for electricity for each category.It should also be pointed out that this report is not designed to workwhen there is a steam turbine among the specified plant equipment items. Thenumbers reported when a steam turbine is present will not be reliable.The report of TOTAL SITE ENERGY and TOTAL SOURCE ENERGY provides adistinction between the energy used per gross square foot of building area andthat used per net square foot of building area. The report generator takesthe gross area from the keyword GROSS-AREA in the BUILDING-LOCATIONinstruction in LOADS. The default for this keyword is the net area, i.e., thesum of the floor areas of the CONDITIONED ZONEs.When a hot storage tank is present, a note is printed on the BEPS report·stating that the hot water storage tank can get energy from many sources. Anytime there is residual energy in the storage tanks, the totals in the BEPSreport will not agree with those in report PS-B, because the BEPS reportincludes only the energy used for the above categories, whereas PS-B includesthe energy that is left in the tanks as ~ll.VII.115 (Revised 5/81)