CAD Model Design - optimising the model

Duncan Brown — Mon, 15 May 2017 11:50:24 GMT

Current Revision posted to Hevacomp Wiki by Duncan Brown on 5/15/2017 11:50:24 AM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

This document provides some best practices for creating Design Database projects.

Method

The Design Database program offers a CAD-like interface that should make entering projects a straight forward process. You do need to take care with your model as a badly designed model can lead to the following:

Runtime Errors
Extended calculation times
Irregular or unexpected results

A model should be constructed as accurately as possible though with some consideration given to design complexity. While we do offer a "CAD-like" interface it should be not be considered a full fledged CAD design tool. Simplicity can be the key to your design allowing for a robust and accurate model.

It would be prudent to familiarize yourselves with the Defaults options in CAD Input. This provides options for setting grab distances for adjacencies and snap accuracy along with other useful features that will help with your design.

Intricate surfaces and room layouts

There are instances where a room layout may contain unnecessary surfaces and recesses:

For Design Simulation or PartL, this would generate a number of extra surfaces which will slow down the calculations. This room could be defined as follows with very little impact on the end calculations:

Incorrect adjacencies

Room adjacencies will usually be created automatically, along with whether a surface is exposed or internal. If a model is inaccurately traced or the grab distance is set too large, then surfaces may not be defined correctly, as here where incorrect tracing has left adjacencies to room 1 , 1b and 1c incorrect.

The correct room layout could be easily created by considering grab distance and by using care when tracing.

Rounded surfaces

Design Database doesn't intrinsically support spherical surfaces. They can be modeled reasonably accurately by incorporating a series of straight wall sections:

You should be aware however that a large number of surfaces would have an adverse effect on the time taken to run Design Simulation projects. It may also introduce more surfaces than the SBEM calculation engine (PartL) can handle. We recommend using as few surfaces as possible model the curved wall, without drastically affecting the room floor area:

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design - optimising the model

Shane Regan — Mon, 12 Dec 2016 14:50:42 GMT

Revision 11 posted to Hevacomp Wiki by Shane Regan on 12/12/2016 2:50:42 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

This document provides some best practices for creating Design Database projects.

Method

Runtime Errors
Extended calculation times
Irregular or unexpected results

Intricate surfaces and room layouts

There are instances where a room layout may contain unnecessary surfaces and recesses:

The correct room layout could be easily created by considering grab distance and by using care when tracing.

Rounded surfaces

Design Database doesn't intrinsically support spherical surfaces. They can be modeled reasonably accurately by incorporating a series of straight wall sections:

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design - optimising the model

Duncan Brown — Mon, 17 Oct 2016 13:46:54 GMT

Revision 10 posted to Hevacomp Wiki by Duncan Brown on 10/17/2016 1:46:54 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

This document provides some best practices for creating Design Database projects.

Method

Runtime Errors
Extended calculation times
Irregular or unexpected results

Intricate surfaces and room layouts

There are instance where a room layout may contain unnecessary surfaces and recesses:

The correct room layout could be easily created by considering grab distance and by using care when tracing.

Rounded surfaces

Design Database doesn't intrinsically support spherical surfaces. They can be modeled reasonably accurately by incorporating a series of straight wall sections:

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design

Duncan Brown — Mon, 02 Nov 2015 14:27:34 GMT

Revision 9 posted to Hevacomp Wiki by Duncan Brown on 11/2/2015 2:27:34 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	ALL
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

This document provides some best practices for creating Design Database projects.

Method

Runtime Errors
Extended calculation times
Irregular or unexpected results

Intricate surfaces and room layouts

There are instance where a room layout may contain unnecessary surfaces and recesses:

Incorrect adjacencies

The correct room layout could be easily created by considering grab distance and by using care when tracing.

Rounded surfaces

Design Database doesn't intrinsically support spherical surfaces. They can be modeled reasonably accurately by incorporating a series of straight wall sections:

To view information about CAD model design, please click here

External links

Bentley homepage

Bentley LEARN Server

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design

Shane Regan — Fri, 19 Jun 2015 13:43:00 GMT

Revision 8 posted to Hevacomp Wiki by Shane Regan on 6/19/2015 1:43:00 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

This document provides some best practices for creating Design Database projects.

Method

Runtime Errors
Extended calculation times
Irregular or unexpected results

Intricate surfaces and room layouts

There are instance where a room layout may contain unnecessary surfaces and recesses:

Incorrect adjacencies

The correct room layout could be easily created by considering grab distance and by using care when tracing.

Rounded surfaces

Design Database doesn't intrinsically support spherical surfaces. They can be modeled reasonably accurately by incorporating a series of straight wall sections:

To view information about CAD model design, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design

Duncan Brown — Tue, 10 Mar 2015 11:25:02 GMT

Revision 7 posted to Hevacomp Wiki by Duncan Brown on 3/10/2015 11:25:02 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

This document provides some best practices for creating Design Database projects.

Method

Runtime Errors
Extended calculation times
Irregular or unexpected results

Intricate surfaces and room layouts

There are instance where a room layout may contain unnecessary surfaces and recesses:

Incorrect adjacencies

The correct room layout could be easily created by considering grab distance and by using care when tracing.

Rounded surfaces

Design Database doesn't intrinsically support spherical surfaces. They can be modeled reasonably accurately by incorporating a series of straight wall sections:

To view information about CAD model design, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design

Duncan Brown — Thu, 27 Nov 2014 11:51:59 GMT

Revision 6 posted to Hevacomp Wiki by Duncan Brown on 11/27/2014 11:51:59 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

This document provides some best practices for creating Design Database projects.

Method

Runtime Errors
Extended calculation times
Irregular or unexpected results

Intricate surfaces and room layouts

There are instance where a room layout may contain unnecessary surfaces and recesses:

Incorrect adjacencies

The correct room layout could be easily created by considering grab distance and by using care when tracing.

Rounded surfaces

Design Database doesn't intrinsically support spherical surfaces. They can be modeled reasonably accurately by incorporating a series of straight wall sections:

To view information about CAD model design, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design

Duncan Brown — Tue, 08 Jul 2014 16:00:00 GMT

Revision 5 posted to Hevacomp Wiki by Duncan Brown on 7/8/2014 4:00:00 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

This document provides some best practices for creating Design Database projects.

Method

Runtime Errors
Extended calculation times
Irregular or unexpected results

Intricate surfaces and room layouts

There are instance where a room layout may contain unnecessary surfaces and recesses:

Incorrect adjacencies

The correct room layout could be easily created by considering grab distance and by using care when tracing.

Rounded surfaces

Design Database doesn't intrinsically support spherical surfaces. They can be modeled reasonably accurately by incorporating a series of straight wall sections:

To view information about CAD model design, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design

Elisabeth Pry — Mon, 24 Jun 2013 18:33:38 GMT

Revision 4 posted to Hevacomp Wiki by Elisabeth Pry on 6/24/2013 6:33:38 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

This document provides guidance on how to create models in Design Database CAD Input.

Method

To view information about CAD model design, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Mechanical, Hevacomp, V8i V25, design database ddb, Building Performance

CAD Model Design

Duncan Brown — Tue, 17 Jul 2012 08:57:10 GMT

Revision 3 posted to Hevacomp Wiki by Duncan Brown on 7/17/2012 8:57:10 AM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): All

Original Author: Bentley Technical Support Group

Overview

This document provides guidance on how to create models in Design Database CAD Input.

Method

To view information about CAD model design, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Design Database - CAD Model Design

Duncan Brown — Mon, 16 Jul 2012 10:29:54 GMT

Revision 2 posted to Hevacomp Wiki by Duncan Brown on 7/16/2012 10:29:54 AM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): All

Original Author: Bentley Technical Support Group

Overview

This document provides guidance on how to create models in Design Database CAD Input.

Method

To view information about CAD model design, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Design Database - CAD Model Design

Shane Regan — Thu, 07 Jun 2012 14:16:35 GMT

Revision 1 posted to Hevacomp Wiki by Shane Regan on 6/7/2012 2:16:35 PM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): All

Original Author: Bentley Technical Support Group

Overview

This document provides guidance on how to create models in Design Database CAD Input.

Method

To view information about CAD model design, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

CAD Model Design - optimising the model

CAD Model Design - optimising the model

Overview

Method

Intricate surfaces and room layouts

Rounded surfaces

CAD Model Design - optimising the model

Overview

Method

Intricate surfaces and room layouts

Rounded surfaces

CAD Model Design - optimising the model

Overview

Method

Intricate surfaces and room layouts

Rounded surfaces

CAD Model Design

Overview

Method

Intricate surfaces and room layouts

Incorrect adjacencies

Rounded surfaces

External links

CAD Model Design

Overview

Method

Intricate surfaces and room layouts

Incorrect adjacencies

Rounded surfaces

See Also

External Links

Comments or Corrections?

CAD Model Design

Overview

Method

Intricate surfaces and room layouts

Incorrect adjacencies

Rounded surfaces

See Also

External Links

Comments or Corrections?

CAD Model Design

Overview

Method

Intricate surfaces and room layouts

Incorrect adjacencies

Rounded surfaces

See Also

External Links

Comments or Corrections?

CAD Model Design

Overview

Method

Intricate surfaces and room layouts

Incorrect adjacencies

Rounded surfaces

See Also

External Links

Comments or Corrections?

CAD Model Design

Overview

Method

See Also

External Links

Comments or Corrections?

CAD Model Design

Document Information

Overview

Method

See Also

External Links

Comments or Corrections?

Design Database - CAD Model Design

Document Information

Overview

Method

See Also

External Links

Comments or Corrections?

Design Database - CAD Model Design