BIM & SIMULATION CIBSE BIM & SIMULATION 14/5/2015. MARTIN SIMPSON ARUP/The University of Salford 1. Linking Building Design Performance and BIM

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1 BIM & SIMULATION Linking Building Design Performance and BIM Martin Simpson Associate Director ARUP RAEng Professor of Innovation University of Salford Should BIM be: A) A process that conforms, enhances and strengthens your current business by facilitating greater efficiency and providing new opportunity? B) A software that you choose to impose on your current business because everyone else is using it and you are therefore willing to conform you business processes to the limitations of the software? MARTIN SIMPSON ARUP/The University of Salford 1

2 Why Change? Cost of Change Cost This must be avoided This is the ideal place for change to occur, ie where it is cheap! Egan stated that up to 30% of construction is rework Feasibility Concept Design Detailed Design Construction Post Construction Time To cost of post construction change is many times the cost of change during design Example Data, Information, & Knowledge Why Change? Lose of Data Concept Design Construction As Built? Current Practice Handover Date atrophy during project lifecycle due to: Information exchange via 2D drawings/sketches/reports/conversations... Upfront simulation is limited and for some disciplines simulation is not accurate We start the final production phase commence before design is complete. Often without production of prototypes (Most buildings are unique!) MARTIN SIMPSON ARUP/The University of Salford 2

3 Why Change? Duplication of work The cost of inadequate interoperability in the U.S. capital facilities industry estimated at: $15.8 billion per year Because the government tells you to? MARTIN SIMPSON ARUP/The University of Salford 3

4 Why BIM Ask the right questions Reduce Capital Cost Reduce Carbon Emission Decrease time to practical completion Improved continuity of Information / Audit Trail Improve whole life asset management Improve consistency in delivery (reduction of errors) Improve level of performance and constructability Improve Safety Reduce of Waste Reduce the consumption of resources Defining BIM? process of designing, constructing or operating a building or infrastructure asset using electronic object-oriented information PAS MARTIN SIMPSON ARUP/The University of Salford 4

5 Defining BIM? A coordinated digital dataset that contains appropriate computable information necessary to design, build, operate and ultimately decommission a project * Sharing Structured Information A 3D model that Contains no object attributes Has no additional information Is composed of only 2D CAD references Is not geometrically accurate Cannot be shared or requires another party to duplicate information or processes and allows you to cheat...is not BIM! MARTIN SIMPSON ARUP/The University of Salford 5

6 BIM is... Project Team members need to be able to exchange and stored project data quickly and with confidence Information Communication Technology Building Information Model (Management) Project Team members need coordinated up to date information to be able to do modelling & calculations Geometrical & BIM Technical Simulations (Virtual Prototype) Project Information Management Project Team members need carry out tasks in such a way that they are easily coordinated, recorded and verified...sharing Structured Information What are we doing really well? MARTIN SIMPSON ARUP/The University of Salford 6

7 Co-ordination MARTIN SIMPSON ARUP/The University of Salford 7

8 MARTIN SIMPSON ARUP/The University of Salford 8

9 MARTIN SIMPSON ARUP/The University of Salford 9

10 Architectural Structural Mechanical Pipework Ventilation Electrical Landscape Underground/Existing Sub-Co Mechanical Sub-Co Architectural Off-Site Manufacture Sub-Co Electrical MARTIN SIMPSON ARUP/The University of Salford 10

11 MARTIN SIMPSON ARUP/The University of Salford 11

12 MARTIN SIMPSON ARUP/The University of Salford 12

13 Quantification MARTIN SIMPSON ARUP/The University of Salford 13

14 Fabrication MARTIN SIMPSON ARUP/The University of Salford 14

15 MARTIN SIMPSON ARUP/The University of Salford 15

16 MARTIN SIMPSON ARUP/The University of Salford 16

17 Where are we going? MARTIN SIMPSON ARUP/The University of Salford 17

18 Project_OVE https://www.youtube.com/watch?v=wjyszl9mdxc MARTIN SIMPSON ARUP/The University of Salford 18

19 MARTIN SIMPSON ARUP/The University of Salford 19

20 MARTIN SIMPSON ARUP/The University of Salford 20

21 Virtually Human Site location MARTIN SIMPSON ARUP/The University of Salford 21

22 MARTIN SIMPSON ARUP/The University of Salford 22

23 MARTIN SIMPSON ARUP/The University of Salford 23

24 MARTIN SIMPSON ARUP/The University of Salford 24

25 Mass model into Revit Modelling Using Rhino & Importing Much Quicker Highly accurate Consistent Bi-directional Mass model used for Rule-ofthumb plant sizing MARTIN SIMPSON ARUP/The University of Salford 25

26 MARTIN SIMPSON ARUP/The University of Salford 26

27 MEP Intelligence Automation Efficiency MARTIN SIMPSON ARUP/The University of Salford 27

28 Current Process What are the opportunities to improve? system strategies heating/ cooling loads airflows equipment sizing systems analysis finalise system time MARTIN SIMPSON ARUP/The University of Salford 28

29 Ventilation Ventilation = Respiratory MARTIN SIMPSON ARUP/The University of Salford 29

30 FCU System level system lungs AHU system MARTIN SIMPSON ARUP/The University of Salford 30

31 Ventilation summary model drives flow neat system browser system splitter but we are not finished with airflow yet Pipework MARTIN SIMPSON ARUP/The University of Salford 31

32 Pipework = Circulatory Terminal unit system Level system Riser system Primary plant system MARTIN SIMPSON ARUP/The University of Salford 32

33 Maximise opportunity in families MARTIN SIMPSON ARUP/The University of Salford 33

34 MARTIN SIMPSON ARUP/The University of Salford 34

35 Air Terminal Flow MARTIN SIMPSON ARUP/The University of Salford 35

36 Throw Air Terminal Flow Pressure drop Noise Fan Coil Unit Duct Cooling Load Noise Data Heating Load CHW Flow LTHW Flow Pipes Chillers Boilers Pumps Services summary Single input (air terminal) drives all other parameters in system Increase automation Maximise efficiency MARTIN SIMPSON ARUP/The University of Salford 36

37 Improving Energy Modeling Efficiency Whole Building Energy Model Revit Model Weather Data Geometry Internal Loads Envelope Performance Schedules HVAC Systems HVAC Plants Aims: Manage and share data Increase efficiency Improve model accuracy Utility Rates Load / Energy Modeling Overview MARTIN SIMPSON ARUP/The University of Salford 37

38 Conventional Method BIM Method Manual zoning diagrams in AutoCad Space creation with embedded data in Revit Manual documentation in Excel gbxml export Manual input into load / energy modeling software Import into load / energy modeling software Workflow Traditional vs BIM Why use BIM over the conventional process? Automation Visualization Accuracy Checking Organization Time-saving Enhanced datasharing among team Fun! MARTIN SIMPSON ARUP/The University of Salford 38

39 Overview of the BIM to BEM workflow ORGANIZE REVIT MEP MODEL FOR ANALYSIS CHOOSE ZONING METHOD & LINK CAD BACKGROUNDS OR REVIT ARCH. MODEL PLACE SPACES AND POPULATE SPACE DATA CHECK MODEL & EXPORT gbxml FILE IMPORT INTO LOAD / ENERGY MODEL AND CHECK COMPLETE ANALYSIS IN LOAD / ENERGY MODELING SOFTWARE IMPORT LOAD AND AIRFLOW DATA BACK INTO REVIT 77 What are Spaces? Vertical Constraints Loads and Airflows Identity Data Data Management MARTIN SIMPSON ARUP/The University of Salford 39

40 Zoning Diagram in Revit MEP Data Management Space Schedule in Revit MEP Data Management MARTIN SIMPSON ARUP/The University of Salford 40

41 Zones in Revit MEP Revit Spaces: Become thermal zones when imported into energy modeling software Store internal gains and schedules (lighting, occupancy, equipment) Store peak heating and cooling loads and airflows Revit Zones: Used to sort Revit Spaces into HVAC systems Ability to store heating / cooling setpoints and outdoor airflow rates Data Management gbxml Export gbxml Export MARTIN SIMPSON ARUP/The University of Salford 41

42 Complete Analysis in Energy Modeling Software TRACE 700 gbxml Import Dialog IES-VE gbxml Import Dialog Revit Zone Imports in TRACE 700 MARTIN SIMPSON ARUP/The University of Salford 42

43 Revit Zone Imports in IES-VE BEM to BIM Importing the analysis results back into Revit Currently no direct export from TRACE 700 or IES-VE to Revit MEP ExcelLink can automate data transfer from spreadsheets Space parameters can store load model results Design cooling load Design heating load Specified supply airflow MARTIN SIMPSON ARUP/The University of Salford 43

44 Displaying information in BIM model BIM used for sharing information and aids design process Dynamic space tags displays information about space or zone Colors schemes based on data useful for checking and programming Loads, airflows can be displayed to size equipment and systems Compare specified supply airflow to actual supply airflow from Revit air terminals Integrated Design of the Interdisciplinary Science and Engineering Complex (ISEC) MARTIN SIMPSON ARUP/The University of Salford 44

45 Northeastern University 220,000 laboratory with Payette Associates 6 stories atrium - Core labs in basement - 2 level penthouse Construction documents Spring 2014 Opening in MARTIN SIMPSON ARUP/The University of Salford 45

46 Building Energy Modeling (BEM) IES VE Geometry for CD created directly in IES. - Avoids error from importing such as voids and intersections Rooms are named to match spaces in the Revit model exactly (name and number) 91 Loads calculated in IES VE 92 MARTIN SIMPSON ARUP/The University of Salford 46

47 IES loads to Revit via Excel Link BEM to BIM integration Spaces added from architects Rooms 94 MARTIN SIMPSON ARUP/The University of Salford 47

48 Adding shared parameter to the spaces 95 Cooling/heating loads now in Revit 96 MARTIN SIMPSON ARUP/The University of Salford 48

49 Chilled beam and diffuser added to space 97 Schedule sheet chilled beams added to project 98 MARTIN SIMPSON ARUP/The University of Salford 49

50 Cooling load schedule 99 Vent check schedule volume flow rate/sqft 100 MARTIN SIMPSON ARUP/The University of Salford 50

51 Duct velocities 101 VAV schedule Spaces and numbers populated automatically Air flow read from ductwork 102 MARTIN SIMPSON ARUP/The University of Salford 51

52 Who is responsible for modelling spaces? MARTIN SIMPSON ARUP/The University of Salford 52

53 BIM is about sharing structured information Future Challenges Clear specifications for model build if others are to rely on the model for their own tasks This has implications on contracts & PI Validation of design & simulation Dissemination through the industry IPR of the design processes that may get embedded into the model Closing the project lifecycle and getting as-built building performance data. Real-time optimisation (power of the cloud) MARTIN SIMPSON ARUP/The University of Salford 53

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