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Tas and Hevacomp underthe Bentley BIM umbrella

Bentley Systems Inc. have agreed a worldwide distribution agreement for EDSL’s Tasbuilding simulation software. This gives EDSL Tas global outreach, further expanding itsglobal presence and market share.

Bentley have also acquired Hevacomp building services design software.

Bentley have combined the market leading strengths of Tas and Hevacomp, the UK’sleading building analysis and design tools, to give them a global solution. The UK is one ofthe most demanding countries in the world for regulation on reduction of CO2 emissionsin the built environment.

Data exchange facilities between Tas and Hevacomp maximise design productivity, whilstensuring design quality.

Bentley’s Energy Performance Series easily integrates with existing 2D workflows andbrings detailed building analysis and simulation to Building Information Modelling (BIM).All of the products work with MicroStation, AutoCAD and interoperate with BentleyArchitecture, Revit and other BIM programs, facilitating collaborative streamlinedworkflows.

Bentley Releases U.S. and Canadian Versions of Robust Energy Performance Series for‘Green’ Building Design.

www.bentley.com/eps

Tas Building &Plant Simulation Software

20 years in the market.

Users in 20 countries.

The team is a mix of top flightengineers, physicists, mathematicians

and computer scientists.

State of the art, efficient softwaretechnology, following a £1mdevelopment investment for acomplete re-write, which was

completed in 2006.

First class technical user support froma dedicated team of experts.

Software compliant with buildingregulations, Part L2 & EPCs andASHRAE (LEED) standards.

SI and Imperial units

Highly regarded building simulationconsultancy service, delivering quality

and economy.

EnvironmentalDesign Solutions Ltd

UPDATE

Who are EDSL now?

www.edsl.netBuilding Simulation Software

Environmental Design Solutions Ltd13-14 Cofferidge Close, Stony StratfordMilton Keynes MK11BY

Tel: +44 (0)1908 261461Fax: +44 (0)1908 566553Email: [email protected]

Reusing bim data for energy analysis

BIM Model

AnalyticalSpace Model

Bentley Tas

Tas Spaces/Zones

EnergyCertificates

EDSL Master Newsletter REV:Layout 1 7/4/09 11:44 Page 2

www.edsl.net Building Simulation Software

TROX VAV ec motor fancoilsPerformance data incorporated into Tas plant simulation softwareTROX VAV ec motor fancoils performance data incorporated into Tasplant simulation software.

Based on detailed laboratory testing and monitoring undertaken byTROX, EDSL have developed simulation procedures that reproducethe measured performance. The impact on calculated CO2 emissionsfor fan energy use is significant. For an efficient building design, movingfrom standard fancoils to TROX VAV fancoils with ec motors canreduce total building CO2 emissions by about 20%. This hasimportant implications for Part L2 compliance and EPC rating for airconditioned buildings. TROX looked for a simulation based tool to tryand quantify the benefits of its technology. They found that Tas wasthe only accredited dynamic simulation software that used componentbased hourly plant modelling, for fans, coils and controls etc, ratherthan SBEM seasonal efficiency ratios and generalised auxiliary energynumbers for fan and pump energy. Tas is able to model in sufficientdetail to allow the true benefits of innovative and new equipmenttechnology aimed at lowering CO2 emissions.

The CO2 emissions graph shows the performance of a new officedesign (that featured in the daylight section opposite) using standardAC fancoils or TROXVAV fancoils. The standard fancoil design is lowerthan the current 2006 target, but would not meet the expected 2010target. The TROXVAV fancoil option betters the expected 2010 target.

EDSL TasConsultancy ServicesWe undertake Tas building simulation basedconsultancy for clients on general design for roomloads and plant sizing, daylight and naturalventilation and plant and control analysis.

EDSL staff are accredited Energy Assessors underthe CIBSE Low Carbon Consultant register andundertake Part L2/EPC compliance calculationsand lodgement.

The quality of the Tas analysis brings benefit to PartL2 and EPC performance, as outlined in the TROXVAV ec motor modelling.

Tas requires little more data than SBEM, but is farmore efficient at data input. Tas consultancyservices are, therefore, very good value formoney. High quality analysis and fast turn around.

Revit 2010, Tas is ready!As part of its commitment to interoperability, EDSL have released a comprehensive gbxmlbased import of 3D geometry and spaces from Revit 2010.

Geometry data may be imported into the Tas 3D model for further detailing and/orevaluation of design revisions. The Tas 3D model is more intelligent than other 3D modelsand helps to ‘heal and forgive’ small errors that occur in the Revit gbxml output, which cancause major problems in less capable products.

Alternatively, the geometry data may be passed directly into the simulation module. This isthe original intent for gbxml. It overcomes issues of complex geometry being passed fromone 3Dmodel to another. Shadow calculations take place in the Tas simulation model. Thisrepresents an excellent access route to simulation for older 3D CAD models.

Revit gbxml

Tas 3D model


Compliance with any of the international standards forbuilding performance requires efficient use of daylightto reduce lighting energy use. This must be balancedagainst the need to avoid excessive solar gains.

Tas is able to provide daylight simulation, which canhandle the simplest to the most complex of buildinggeometries. Daylight distribution in spaces is importantfor BREEAM and LEED accreditation. Daylight factorson the working plane may be used, in conjunction withhourly climate data to calculate hourly variations ininternal daylight illumination. This, in turn, may be usedto test the efficacy of a range of daylight basedlighting control scenarios, from simple on/off tophotocell dimming.

In combination an extensive range of simple to apply,shading features may be modelled, along with windowshape and glass type to optimise daylight penetrationand minimise solar gains.

www.edsl.netBuilding Simulation Software

Optimising daylight availability and solar shading

Our commitmentThe EDSL Tas promiseto users of alternative,accredited, simulationsoftware.

We can

� Halve your softwareoverheads

� Double your productivity

� Improve the quality ofyour analysis

� Provide quality technicalsupport

� In addition, we will traintwo people for the priceof one

Ask us to prove it to you

Successful natural ventilation design is achallenging task. Tas has a uniquely efficient,broad and robust capability for naturalventilation studies.Consistent with EDSL's ethic of providingthe best possible quality of analysis, Tasincludes laboratory tested and monitoredperformance data for the range of Passiventventilation systems.The project featured is Roundhouse School,Derby, the design for which was undertakenby Hilton Building Services Ltd.Included in the design are PassiventAirstracts with axial boost fans. The schoolis designed to operate using passive stackand wind driven ventilation for most of the

time, with the boost fans assisting duringperiods of hot weather.Air is drawn into the classrooms via wallventilators and windows, through into acentral courtyard/atrium and out throughthe roof ventilators, which contain theboost fans.The design complies with BB101 on allthree of the summertime temperaturecriteria.Good quality design for naturally ventilatedbuildings requires good quality analysis. Tasis the most capable design tool for passiveperformance evaluation, giving yourschemes the best chance of avoiding the riskof overheating.

Natural ventilation andmixed mode design

Roof windows1250mm x 1250mm Airstract units

Typical window groupInlet vent


www.edsl.net Building Simulation Software

What ourclients say..."We have been using Tas for almost 20 yearsand it is a great comfort to us to know that theresults predicted by the software have beenmatched by reality.

Alan Fogarty, Environmental Partner,Cundall

"We have been using Tas now for well over 10years and we have found it to be a very robustpiece of software, allowing us to deliver eventhe most geometrically complicated projectson time and within budget"

"DTM analysis is now an essential tool for theenvironmental engineer allowing us to examinein detail current energy legislation and theresulting design impact they have on ourbuildings"

Matt Kitson, Sustainability DirectorHilson Moran

BAMDesign has been using Tas as our buildingenergy modelling tool for 10 years.

It has the quality of analysis and robustness weneed to be confident that the buildings wedesign will be high performers when handedover to the client.

Tas is used initially to check the validity of theoverall design concept.

A major advantage in our design process is thatmany of our design calculations are availablewithin the same Tas model which makes ourworkflow efficient.

Our designs always consider opportunities toadopt passive techniques and earlyengagement is key to ensuring that theArchitecture is working efficiently, and thatnatural daylight optimisation is maximised.

We carry out life cycle analysis to determinestrategies for renewable energy, for which Tasinforms us on annual energy contribution andCO2 emissions.

Tas further allows us to determine space loadsand the output data leads to selection of plantand ancillaries.

On completion of our designs, the final stageallows us to carry out building regulationcompliances including Part L and EPCCertification.

Stephen Burford, Director, BAM Design

BAM - Design Study


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