Design For Disassembly (DFD) in Whole life cycle Assessment.

Whole of Cycle Assessment Design For Disassembly

Narges Flowersun

Design For Disassembly in The Whole of Cycle Assessment (DfD)

• Demolishing • Deconstruction • Repair • Reuse

Whole life cycle Assessment

Disposal and obsolescence

•Design for the ENV •Minimization •Intensity of Use •Dematerialization •Reuse •Recycle •Degrading •Salvage martial •Embodied energy •Technology • Rebound effect

Manufacturing materials

extraction manufacturing design construction

• • • • •

Efficiency Durability Performance Intensity of Use serviceability

Use and operation

operation

Design and construction

renovation • Design for the ENV • Design for the Durability • Design for the Serviceability • Design for Maintainability • Design for the Flexibility • Design for the Easy of Assemble • Design for the performance • Design for the Deconstruction • Modular Design • Prefabrication •

Design for Disassembly

disposal

design of buildings to facilitate future change and the eventual dismantlement (in part or whole) for recovery of systems, components and materials.

This design process includes developing the assemblies, components, materials, construction techniques, and information and management systems to accomplish this goal.

What is DfD ?

The recovery of materials is intended minimize environmental impacts

maximize economic value reuse, repair, remanufacture and

Recycling and safe biodegradation.

DfD enables flexibility, convertibility.

Df D includes using reusable materials & materials intended as recycling feedstock and “natural� materials that might be entirely biodegradable

Product inception Design cycle

Pre _ Design cycle

Design for Disassembly

research recycling stream

create measurable goals

organizational education

research martials processes

evaluate measurable results

create DfD concept

examine end –of- life results

implement DfD products or services

Post _ Design cycle

Product Release

Design for disassembly methodology

What is Design for Disassembly?

Human factors

Technology

Hierarchical Modular modelling

DfD Guidelines Active Disassembly

Disassembly Embedded Design

others

Enable maintenance

Reasons for Disassembly

Enhance serviceability End-of-life (EOL) objectives such as product reuse, remanufacture, and recycling

product is reacquired

how does disassembly work?

product taken to special DfD facilities Each component of the product is taken off the components are sorted

then reused .recycle and refurbished

Manufacturing materials Disposal and obsolescence

Use and operation

Design and construction

•Design for the ENV •Minimization •Intensity of Use •Dematerialization •Reuse •Recycle •Degrading •Salvage martial •Embodied energy •Technology • Rebound effect

1.Use bolted, screwed and nailed connections 2.Select materials using the precautionary principle 3. Minimize or eliminate chemical connections 4. Separate mechanical, electrical and plumbing(MEP) systems.

5. Simplicity of structure and form.

6. Interchangeability.

7. Document materials and methods for deconstruction.

8. Design connections that are accessible.

9. Design to the worker and labor of separation.

provide ready access to parts. Fasteners. etc. to support disassembly Disposal and obsolescence

Use and operation

Manufacturing materials

design modular products to enable modules to be disassembled for service or re-use

Design and construction • Design for the ENV • Design for the Durability • Design for the Serviceability • Design for Maintainability • Design for the Flexibility • Design for the Easy of Assemble • Design for the performance • Design for the Deconstruction • Modular Design • Prefabrication • Design for

Disassembly

minimize weight of individual parts and modules

Enhance serviceability Cost- saving whit disassembly

Disposal and obsolescence

Manufacturing materials

better selection of martials more specific identification of component martials

Use and operation • • • • •

Efficiency Durability Performance Intensity of Use serviceability

•

SLD

Design and construction

assembly methods that provide for more efficient and possibly automated disassembly

DfD includes using reusable materials & materials intended as recycling feedstock and “natural� materials that might be entirely biodegradable

most important reason to disassembly

Demolishing Deconstruction Repair Reuse Disposal and obsolescence

component reuse Manufacturing materials

remanufacture

recycle Use and operation

Design and construction

Waste management

construction

Technology Furniture manufacturing

what industries use DfD?

Electronic manufacturing Automobile manufacturing

what industries use DfD? (Construction)

The Six S’s According to Stewart Brand

• Site (geographical setting, urban location, legally defined lot) can easily outlast the life of the building.

• Structure (foundation and load-bearing elements) can last 30-300 years although many buildings don’t live that long for other reasons.

The Six S’s According to Stewart Brand

• Skin (the building envelope, consisting of frame, exterior finishes, glazing, etc.) can change for repair or appearances every 25 years or so.

• Services (the utility and HVAC systems and moving parts like elevators)may reach the point of major replacement every 7-15 years and can cause demolition of an entire building if their embedded-ness prevents alteration.

• Space Plan (division of space, cabinetry, interior finishes) can range widely from a commercial setting being overhauled every 30 years to a much longer life in a residential setting.

• Stuff (furniture, free-standing lamps, appliances, etc.) the things that change daily to monthly.

(Brand, 1994)

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