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Simple input/output file structuresNo surface, zone or system limitsĭefaults to 50 coils per HVAC loopCan be increased Heat balance loads calculation (one of two load calculation methods recommended by ASHRAE)Moisture balance calculationSimultaneous building/systems solutionSub-hourly time stepsModular HVAC system simulationWINDOW 5 methodology Only models what is explicitly describedMissing wall does not let air inMissing roof does not let sun in Migration between zonesApproximates air exchange using a nodal model Time dependent conductionConduction through building surfaces calculated with conduction transfer functionsHeat storage and time lags
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#DOTS HVAC SIMULATION 3.0 SOFTWARE#
Heat Transfer Mechanisms:Conductiontransfer of thermal energy through a solidConvectionexchange of thermal energy between a solid and a fluid that are in contactRadiationexchange of thermal energy via electro-magnetic waves between bodies or surfacesįully integrated building & HVAC simulation programBased on best features of BLAST and DOE-2 plus new capabilitiesWindows 95/98/NT/2000/XP & LinuxSimulation engine onlyInterfaces available from private software developers Quick Review of Important Background ConceptsĬontrol Volumes and the Conservation of:MassEnergy (First Law of Thermodynamics) Simulation can and has played a significant role in reducing the energy consumption of buildingsīuilding thermal simulation allows one to model a building before it is built or before renovations are startedSimulation allows various energy alternatives to be investigated and options compared to one anotherSimulation can lead to an energy-optimized building or inform the design processSimulation is much less expensive and less time consuming than experimentation (every building is different) Much of this energy is consumed maintaining the thermal conditions inside the building and lighting Load CalculationsGenerally used for determining sizing of equipment such as fans, chillers, boilers, etc.Įnergy AnalysisHelps evaluate the energy cost of the building over longer periods of timeīuildings consume roughly one-third of all the energy consumed nationally every year Gain an understanding ofSimulation as a ConceptEnergyPlus as a Simulation Toolīriefly review topics important to your understanding of building thermal simulationsĭefinition: the imitative representation of the functioning of one system or process by means of the functioning of another (Merriam-Webster Dictionary On-Line)Īpproximate definition: a computer model of the energy processes within a building that are intended to provide a thermally comfortable environment for the occupants (or contents) of a buildingExamples of building thermal simulation programs: EnergyPlus, Energy-10, BLAST, DOE-2, esp-R, TRNSYS, etc. and University of Illinoisat Urbana-Champaign under contract to the National Renewable Energy Material prepared by GARD Analytics, Inc. Lecture 1: An Overview of Simulation and EnergyPlus