Stanford CEE 214 - Energy Simulation and BIM (16 pages)

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Energy Simulation and BIM



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Energy Simulation and BIM

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Lecture Notes


Pages:
16
School:
Stanford University
Course:
Cee 214 - Introduction To Modeling And Analysis In Cee

Unformatted text preview:

E Energy Si Simulation l i and d BIM Benjamin Welle P E C E M LEED AP PhD Student CIFE CEE Department Stanford Universityy What is an Energy Model An energy simulation model uses a computer to model the complex energy flows and processes in buildings Calculates cooling and heating loads by simulating the thermal performance of the building Calculates energy use over the course of a year by simulating the performance of HVAC equipment in response to these loads Calculates annual utility costs using the energy use results What are the simulation results used for LEED energy performance calculations Utility incentive calculations Energy code compliance calculations Research Policy development Testing the building before it s built Verifying performance after it s it s built How do Energy Models work Energy simulation tools typically consist of a graphical user interface GUI and a thermal calculation engine g The thermal calculation engine predicts the annual energy use of the building the energy costs and in some cases the thermal comfort for its occupants The simulation engine does this using a description of the building geometry and layout layout constructions operating schedules internal loads heating ventilating and air conditioning HVAC systems local weather data and utility rates that are provided by the user It performs an annual hourly simulation first calculating the building loads then calculating the system i h lloads d requirements to meet those Building Thermal Loads Energy gy Simulation Inputs p Occupant Loads Lighting Loads Equipment Loads Infiltration Loads Thermal Zones Construction Types Walls Roofs Floors Windows Doors Occupant Schedules Lighting Schedules E i Equipment Schedules S h d l Thermostat Schedules HVAC Schedules Remember Garbage In Garbage In Garbage Out DOE 2 vs EnergyPlus DOE 2 EnergyPlus Source Birdsallet al 1990 Overview of the DOE b ildi energy analysis building l i program Version V i 2 1D 2 1D Source EnergyPlus Documentation No



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