BS8: IFC HVAC Extension Schemata 7 August 2000 Dr' Vladimir Bazjanac Lawrence Berkeley National Labo

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BS-8 IFC HVAC Extension Schemata7 August 2000
Dr. Vladimir BazjanacLawrence Berkeley
National LaboratoryProject Leader
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IFC 2x Architecture
Kernel
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What Can IFC 2x Do?
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What Can IFC 2x Do?

• Compartmentation
• fire
• workstation

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What Can IFC 2x Do?
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What Can IFC 2x Do?
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What Can IFC 2x Do?
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What Can IFC 2x Do?
Maintenance History
Inventories
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HVAC Definitions in IFCs Now

• Basic definitions for shared building service
  elements
• distribution element/port type
• equipment type
• flow
• plumbing fixtue
• primary fitting
• Basic definitions for HVAC extension schema
• actuator
• air terminal box
• controller
• damper
• sensor
• valve

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Functionality Supported Now

• Acquisition of building geometry by
• HVAC applications that depend on exchange of
  building geometry (e.g., duct layout)
• one-way applications that import what is
  available (e.g., thermal calculations))
• Cataloguing (some) performance metrics during the
  life-cycle of a building
• capture of planning phase performance metrics
• capture of design phase performance metrics
• capture of as-built performance metrics

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Planned BS-8 Functionality

• Extend IFC schemata to support the modeling and
  simulation of HVAC components and systems
• Support the use of various building simulation
  tools
• Import information from upstream applications in
  .ifc or XML format
• building geometry
• general and performance specifications of
  materials
• general and performance specifications of
  quipment and furnishings
• Export information to downstream applications in
  .ifc or XML format
• other HVAC applications
• cost estimating applications
• commissioning and building operations/maintenance
  software
• code-checking applications
• software that serves utility companies
• many other types of applications

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EnergyPlus Simulation Engine

• E HVAC-related definitions and input
• chillers heat recovery
• boilers desiccant units
• furnace packaged systems
• dometic hot water heaters compressors
• generators (all types) heat pumps
• pumps window air-conditioners
• heat rejection fan coil units
• cooling towers two- and four-pipe inducution
  units
• storage radiant heating/cooling
• control strategies air terminal units
• fans evaporative coolers
• coils connections via pipes and ducts
• outside air economizers

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BS-8 Deliverables to the IAI

• Project explanation and summary (early)
• definition of need and project rationale
• scope of work
• management plan (resources, participation,
  schedules)
• AEC/FM industry process definitions (each)
• process scope and definitions
• process diagram(s)
• definition of tasks and the corresponding use
  scenaria
• Detailed analysis of information requirements for
  each defined process
• identification of existing objects and the
  associated data types
• definition of the proposed objects and the
  associated data types
• list of disciplines/applications that are source
  or beneficiaries of information
• documentation of issues raised in reviews and
  their resolution
• Object definition tables
• a spreadsheet with complete definitions of all
  proposed objects

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BS-8 Review Process

• Structured and systematic review of work
• formal requests and summaries
• regular schedule
• regular review teleconferences
• Incremental release of parts for review
• schemata released for review at early, mid- and
  final state of development
• concurrent work and conncurent review
• Reviewers (complete list yet to be developed)
• internal (SRG)
• BS-8 international partners (BS-7 team, CSIRO)
• HVAC software developers (E team, Keops,
  TRANSYS, )
• industry members (ASHRAE, selected consulting
  engineers, manufacturers, utilities, etc.)
• The IAI Technical Advisory Group (TAG)
• Continuously updated issues/resolutions log
• exposd on the public web site

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BS-8 Schemata Integration

• Spreadsheet-to-EXPRESS
• Integration with the rest of the IFC object data
  model
• Complete extension schemata documentation
  schemata diagrams, semantic definitions,
  definitions of all object/attribute/relationship
  sets, all data types
• EXPRESS definitions
• EXPRESS-G flow charts
• on-line documentation (interlinked HTML pages)
• printable files

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Resulting Implementations

• Extension of BS Pro server
• Extension of BS Pro E client
• XML client?
• ??

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Processes Supported by BS-8

• Fully supported process Building energy
  performance simulation
• Implicitly supported processes
• 1. Dynamic load estimation
• 2. HVAC design
• 3. HVAC equipment selection
• 4. Measurement and verification (HVAC view)
• 5. Building performance metrics (HVAC view)
• 6. HVAC system and equipment commissioning
• 7. HVAC system and equipment retrofit
• 8. HVAC system and equipment physical layout
• 9. HVAC system and equipment product data
  (catalogues, external data bases)

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Processes Supported by BS-8

• Partially supported processes
• cost estimating
• procurement
• service
• energy code compliance
• maintenance
• operations
• fault detection and diagnostics
• emergency response
• construction and installation
• utility billing and cost allocation
• interference checking
• HVAC construction documents
• accessibility

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Heating Cooling A-H Unit
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Dual Duct VAV A-H Unit
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Project Development Process
Typical IAI
BS-8
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BS-8 Project IAI Schedule
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BS-8 Info Exchange Environment

• Project web site
• up-to-date project information
• file depository
• issues/resolution log
• Bi-weekly teleconferences
• Face-to-face meetings

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BS-8 Project Web Page

• URL
• http//eetd.lbl.gov/btd/iai/bs8
• Username with write privileges
• bs8body
• Password
• hvac4iai

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BS-8 Project Leader
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• Thank you!
• Questions?