South West BIM Hub Ben RouncefieldSwales URS Sustainable Design amp Construction benrouncefieldswalesurscom 07917 898548 2 One of the worlds leading engineering construction and technical services firms ID: 230991
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Slide1
How do you BIM an existing building?
South West BIM Hub
Ben Rouncefield-Swales
URS – Sustainable Design & Construction
ben.rouncefield-swales@urs.com
07917 898548Slide2
2
One of the world’s leading engineering, construction and technical services firms.
Focuses on four key markets:
Infrastructure Governments Power Industrial & CommercialFully integrated services support full project lifecycle. Serves federal, national, state and local government agencies, FORTUNE 500 companies and other multinational corporations.Approximately 57,000 employees in more than 50 countries worldwide.
URS - OverviewSlide3
Who cares about existing buildings?
But 70% of all buildings in 2050 are already built
Buildings are responsible for 40% of global energy demandSlide4
Carbon Liability:
schemes like the CRC require
private and public
energy users to pay a tax on their energy billThe
EPBD -
net-zero energy by 2019 for all new buildings, and carbon neutrality
by 2019 for all new commercial buildingsUnable to
let E rated buildings from April 2018
Energy costs drive
landlords
to improve the thermal efficiency of their existing building stock
Research shows higher
rental income
secured for buildings with sustainability credentials
What are the Drivers
for
Change?
Rising
energy costs
will force occupiers to adopt sustainable operations and improve the efficiency of M&E equipment
The
Green Deal
intended to stimulate
the improvement of energy efficiency in existing buildings Slide5
What is happening now?
Traditional energy audits
Cost can vary depending upon level of output required
Some modelling may be done for high investment items – usually at design stageMore involved AM&T contractingHigh cost and long contract periodsCreates good data but still need to work up into opportunitiesTypically outputs are data not modelsEnergy Performance ContractingInvestment grade energy auditDetailed modelling to underpin financeNo initial cost to client but pays through savingsDo It YourselfSuccess varies depending upon in-house skillsUnlikely that any modelling would be doneSlide6
Wouldn’t it be nice….
If we could determine energy savings for existing buildings using a method that is…
Comprehensive
QuickAccurateInexpensiveAble to leave a legacy that is useful in the futureSlide7
That’s why URS developed REM
R
apid
Energy ModellingA tool developed by URS in partnership with AutoDeskUses innovative means to quickly construct a 3D model of the buildingPhysical Audit feeds information into the modelReVit models the building and tests improvement measuresOuptut leaves a legacy model for the building
MANAGE
BUILD
DESIGN
PLANSlide8
The REM processSlide9
Data CaptureSlide10
Laser scanningSlide11
PhotogrammetrySlide12
PhotogrammetrySlide13
3D sketchingSlide14
From a floor plan – in 30 minutes
Generated from 2D plans & elevations using
AutoCAD, Revit, Vasari, Google Sketchup etc.
From the laser scan – in 2 hours
No drawings required – photogrammetry builds a 3D model
Rapid ResponseSlide15
Immediate decision makingSlide16
Option & Sensitivity Studies - Readily Undertaken
Alter key building elements and observe impact on energy & CO
2
outputs and also quality of internal space
Unimproved
With external shadingSlide17
Example output - recommendations
Short
Term
Medium
Term
Strategic
1
Space set points on heating system
17
Solar Thermal
20
Upgrade lighting to LED
3
Time clock on water heaters
16
Thermal performance
– Ext. Walls
22
Draft lobby at main entrance
5
Replace boilers
14
Energy heat meters
24
Thermal performance-windows
4
Upgrade time clock system
19
Photo
Voltaics
15
Slave Terminals
7
Daylight dimming system
18
Thermostat & time control
6
Install PIR control
23
Occupancy sensing on
cooling
2
Variable Speed Drives
21
Thermal performance - Roof
8
Repair Damaged windows
12
Lighting zoning and control system
13
TRVs
9
Reduce door air leakage
10
Adapt T8 to T5
light fittingsSlide18
Case Study
18Slide19
City of London office - introduction
Late-Victorian office
Multi-tenantedCirca 3,500 m
27 storiesEnergy spend c. £50k p.a.Slide20
City of London office – REM
Site visit circa 3 hours
Photogrammetry modelRapid Energy Model created
Accuracy <10% difference*
includes small power, computers, communications equipment, printers etc
*Slide21
City of London office – Improvement Recommendations
Low Cost, Quick Wins
Medium Cost
Strategic
Energy cost saving (p.a.)
£ 10,260
£ 9,570
£7,550
Carbon emissions saving (p.a.)
21%
19%
15%
Specific improvement measures
Review and implement Good Practice recommendations
(behaviour & operation)
Install Voltage Optimisation Unit
Upgrade lighting to LED lamps in appropriate areas
Install time clock on water heaters
Install lighting PIR occupancy control
Install occupancy sensing on cooling systems within meeting rooms
Interconnect existing control systems
Install daylight dimming system
Install thermostat and time control on electric panel heaters within communal parts
Adapt T8s to T5s in main office
Replace laptops / docking stations / terminals with "mainframe" and slave monitor and keyboard terminals
Implement energy metering strategy
Replace centralised hot water with point of use hot water suppliesSlide22
City of London office – Improvement RecommendationsSlide23
REM experience across the Built Environment
R
EM studies undertaken since March 2011 Accuracy consistently <±10% Average CO
2 and energy savings identified
circa 40%
Oxford
University
Student
Accom
.
URS Basingstoke
Office
AB
InBev
Belgium
Office
Manchester Council
Office (Nat vent)
URS Nottingham
Office and Labs
AB
InBev
Bremen
Office
Oxford University
Student
Accom
.
Major Property
Man.
Office (Period)
Gateshead
Housing BlockSlide24
Summary
24Slide25
Lots of buildings – most already built
Poor understanding of building performance
T
raditional audit / survey take a long timeNeed to act now to meet commercial imperatives:
Delivering cost savings
Improving energy performanceEnhancing working environment
Reducing carbon emissionsKey issuesSlide26
What benefits will REM bring?
It helps reduce a building’s energy running costs and CO
2 emissions
It provides a rapid focus on building improvement optionsIt is a Building Information Modelling (BIM) process, creating a legacy model that can be retained and refinedImproves building user environmentSlide27
What about the nitty gritty?
Cost for one-off single building REM study – circa £5k
Scalable for with economies building portfolio
Turnaround time – 3 weeks (from site visit and info received)Process loads and unusual buildings add complexity!Step 1 in “Energy Management” offer The future – UAV surveysSlide28
Thank You
28
Ben Rouncefield-Swales
AssociateURS – Sustainable Design & Constructionben.rouncefield-swales@urs.com
07917 898548