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Published byBernadette Craig Modified over 6 years ago
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Lecture Objectives: Finish with major ES software Introduce HW 4
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Characteristic parameters
Conduction (and accumulation) solution method finite dif (explicit, implicit), response functions Time steps Meteorological data Radiation and convection models (extern. & intern.) Windows and shading Infiltration models Conduction to the ground HVAC and control models
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ES programs Large variety DOE2 eQUEST (DOE2) BLAST ESPr TRNSYS
DOE2 eQUEST (DOE2) BLAST ESPr TRNSYS EnergyPlus (DOE2 & BLAST)
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eQUEST (DOE2) US Department of Energy & California utility customers
eQUEST - interface for the DOE-2 solver DOE-2 - one of the most widely used ES program - recognized as the industry standard eQUEST very user friendly interface Good for life-cycle cost and parametric analyses Not very large capabilities for modeling of different HVAC systems Many simplified models Certain limitations related to research application - no capabilities for detailed modeling
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ESPr University of Strathclyde - Glasgow, Scotland, UK
Detailed models – Research program Use finite difference method for conduction Simulate actual physical systems Enable integrated performance assessments Includes daylight utilization, natural ventilation, airflow modeling CFD, various HVAC and control models Detail model – require highly educated users Primarily for use with UNIX operating systems
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ESPr University of Strathclyde - Glasgow, Scotland, UK
Detailed models – Research program
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TRNSYS Solar Energy Lab - University of Wisconsin
Modular system approach One of the most flexible tools available A library of components Various building models including HVAC Specialized for renewable energy and emerging technologies User must provide detailed information about the building and systems Not free
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Component-based simulation programs - Trnsys
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EnergyPlus U S Department of Energy
Newest generation building energy simulation program ( BLAST + DOE-2) Accurate and detailed Complex modeling capabilities Large variety of HVAC models Some integration wit the airflow programs Zonal models and CFD Detail model – require highly educated users Very modest interface Third party interface – very costly
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EnergyPlus
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Software comparison (BESTest)
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HW 4 Modeling based on Measured Data
Location: Syracuse
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HW4 Empirical model: Q=f(DBT)
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