Lecture建模问题E+.pptVIP

April 2003 EnergyPlus Workshop for Beginning Modelers - Part 1 Lecture 7: Building Modeling Questions Importance of this Lecture to the Simulation of Buildings Every building is different in many ways: Location/exterior environment Construction/building envelope HVAC system Building envelope/construction determines how a building will respond to the exterior environment Thermal simulation requires information about the physical make-up of the building, where various constructions are located and how they are oriented, how the building is subdivided into zones, etc. Thermal simulation requires information on the building envelope to properly analyze the building from an energy perspective Purpose of this Lecture Gain an understanding of how to specify the building construction Groups of Surfaces (Zones) and Overall Building Characteristics Walls, Roofs, Ceilings, Floors, Partitions, etc. Materials and Groups of Materials (Constructions) Potential Questions You Might Have Is every room a zone? How many zones? How detailed should the building model be? How accurate will my results be? Do I need to do a design day run or an annual run? Defining a Building Getting Started Manual A methodology for using EnergyPlus Four Step Process Gather information Zone the building Create building model Create input file Step 1 - Gather Information Location and design climate Building description Wall constructions Wall sizes Window, door, overhang details Wall locations (shading) Building use information Equipment and occupancy information Schedule information Step 1 - Gather Information (cont’d) Building thermostatic controls HVAC equipment information Equipment types Operating schedules Control information Step 2 – “Zone” the Building Thermal, not geometric, zones Heat storage and heat transfer surfaces Heat transfer ? only when expected to separate spaces of significantly diff temps Exterior Walls, Roofs, Floors Heat storage surfaces ? surfaces separating spaces of same temperatur