FUNDAMENTAL OF HEAT TRANSFER Fundamentals of Heat Transfer

FUNDAMENTAL OF HEAT TRANSFER

Fundamentals of Heat Transfer Heat flows from a hot or warm medium to a cold medium in three ways : 1 2 3 Conduction Convection Radiation Heat transfer through solid or fluid materials Heat transfer involves the physical movement of air Heat transfer from warm surface to cooler surface through air or vacuum Conduction Convection Sunlight Radiation

Radiant Heat Transfer

Radiation Radiant Heat / energy from sun light (IR - heat rays) Strike other object surface absorbed, temp. Energy strike a object surface, absorbed, temp. Radiation between surface

What is a Radiant Barrier?

What is a Radiant Barrier? Definition …. p A radiant barrier consists of a layer of metallic foil, with low emittance, that significantly reduces the transfer of heat energy radiated from “hotter” surfaces to “colder” surfaces (e. g. , the deck of an attic to the attic floor). p Among the benefits of installing radiant barriers are energy savings, $ savings, and comfort.

What is a Radiant Barrier? How they work … Radiant barriers reduce radiated heat transfer rate by the combination of the low emittance/ high reflectance properties of the foil.

What is a Radiant Barrier? Benefits … “Preventing the sun's radiation from entering through the roof can make a significant contribution to comfort and reduction in cooling bills/needs. ” From: Sustainable Building Sourcebook, Chapter: Energy

Industrial Laminates Products “The Ultimate Choice For Insulation”

Difference feature of Radiant barrier & Reflective insulation SIRIM Certified to MS ISO 9001: 2000 Registration no. AR 0385 RIMM SIRIM “The Ultimate Choice For Insulation”

Types of 1 Woven Foil 2 Paper Foil 3 Bubble Foil 4 Foam Foil 5 Veno Foils

Types of 1 Woven Foils

Advantage a) b) c) d) Excellence tear resistant Light weight and high strength Good vapor barrier No wire netting require for installation Disadvantage a) Uneven surface b) Higher shrinkage

Types of 1 Foils Woven Foil Single Sided Non Fire Retardant Alum Double Sided Alum / MPET Alum / Alum Single Sided Fire Retardant Alum Double Sided Alum / MPET Alum / Alum

Types of 2 Paper Foils

Advantage a) Good surface appearance b) No shrinkage c) Lower cost Disadvantage a) b) c) d) Easy to tear Low strength Need wire netting to support Moisture sensitive

Types of 2 Foils Paper Foil Single Sided Non Fire Retardant MPET Double Sided MPET / MPET Fire Retardant Double Sided Alum / MPET Alum / Alum

Types of 3 Bubble Foils

Advantage a) b) c) d) e) Good surface appearance Better R-value Better sound barrier No wire netting require Good vapor barrier Disadvantage a) b) c) d) Easy to tear Lower strength Higher cost Bulky

Types of 3 Foils Bubble Foil Single Sided Non Fire Retardant Alum Double Sided Alum / MPET Alum / Alum Fire Retardant Double Sided Alum / MPET Alum / Alum

Types of 4 Foam Foils

Advantage a) b) c) d) e) Good surface appearance Better R-value Better sound barrier No wire netting require Good vapor barrier Disadvantage a) Higher cost b) Bulky

Types of 4 Foils Foam Foil XFR 302 A-5 Alum/Alum Fire Retardant XFR 302 A-10 Alum/Alum

Types of 5 Foils Veno Foil Single Sided Non Fire Retardant Alum / PET Double Sided Alum / MPET Single Sided Fire Retardant Alum / PET Double Sided Alum / MPET

Introducing … New Innovation of Radiant Barrier

Leno Fabric - Interlocking of yarns - Open weav system - Reduce material usage - High tear resistant - excellence appearance Woven Fabric - Non-interlocking yarns - Close weav system - More material usage - High tear resistant - Uneven surface

Comparison On R-Value For Mass Insulation vs Reflective Insulation Materials (ASTM C 518) 1. 20 1. 02 1. 00 R VALUE 0. 80 0. 60 0. 40 0. 23 0. 20 0. 12 0. 00 0. 15 0. 12 TYPES OF INSULATION Rockwool (60 kg/m 3) Foam Foil (10 mm) Foam Foil (5 mm) Bubble Foil (ø 30 mm) Bubble Foil (ø 10 mm)

Comparison On R-Value For Mass Insulation vs Reflective Insulation Material with 50 mm Air Gap Top & Bottom (ASTM C 518) 3. 00 2. 47 2. 50 2. 33 2. 29 2. 17 R VALUE 2. 00 1. 50 1. 02 1. 00 0. 50 0. 00 TYPES OF INSULATION Rockwool (60 kg/m 3) Foam Foil (10 mm) Foam Foil (5 mm) Bubble Foil (ø 30 mm) Bubble Foil (ø 10 mm) Woven Foil (140μ)

MS 2095: 2014 Radiant Barrier and Reflective Insulation Building Materials Specification

FOURTH SCHEDULE Standards for Certification of Construction Material

Installation method SIRIM Certified to MS ISO 9001: 2000 Registration no. AR 0385 RIMM SIRIM “The Ultimate Choice For Insulation”

Important guideline To ensure reflective insulation system work, the following installation guideline are important: a) The low emissivity surface(high reflective surface) face the air gap. b) Ensure no roof leaking, aluminium will oxidize. c) 3 -6 inch overlapping at the edge. d) Avoid installation during raining day.

SINGLE METAL ROOF SYSTEM (radiant barrier + Mass Insulation + wire netting) 2 1 3 1 Metal roof 2 Screw 4 5 6 7 3 Insulation felt 4 Mass insulation 5 Reflective foil 6 Wire netting 7 C-Purlin

SINGLE METAL ROOF SYSTEM (radiant barrier + Mass Insulation) 2 1 3 4 6 5 1 Metal roof 2 Screw 3 Insulation felt 4 Mass insulation 5 Reflective foil 6 C-Purlin

DOUBLE METAL ROOF SYSTEM (radiant barrier + Mass Insulation) 2 1 3 4 6 1 Metal roof 2 Screw 3 Insulation felt 5 7 4 Mass insulation 5 Reflective foil 6 C-Purlin 7 Metal roof

SINGLE METAL ROOF SYSTEM (reflective insulation- foam/bubble foil) 2 1 3 4 5 1 Metal roof 2 Screw 3 Insulation felt 4 Reflective insulation 5 C-Purlin

DOUBLE METAL ROOF SYSTEM (reflective insulation- foam/bubble foil) 2 1 3 5 4 6 1 Metal roof 2 Screw 3 Insulation felt 4 Reflective insulation 5 C-Purlin 6 Metal roof

SINGLE METAL ROOF SYSTEM (reflective insulation- foam/bubble foil) 2 3 1 4 5 6 7 1 Metal roof 2 Screw 3 Insulation felt 4 Z- spacer 5 Screw 6 Reflective insulation 7 C-Purlin

DOUBLE METAL ROOF SYSTEM (reflective insulation- foam/bubble foil) 2 3 1 4 5 1 Metal roof 2 Screw 6 7 3 Insulation felt 4 Z- spacer 8 5 Screw 6 Reflective insulation 7 C-Purlin 8 Metal roof

RESIDENTIAL PITCH ROOF - OPEN ROOF SYSTEM (radiant barrier/reflective insulation)

DOUBLE METAL CLADDING 6 1 External metal cladding 2 Screw 3 Mass insulation 4 C channel metal purlin 5 Reflective foil 5 3 1 2 4 7 6 Airspace 7 Internal metal cladding

SINGLE METAL CLADDING 1 External metal cladding 2 Screw 3 Mass insulation 4 C channel metal purlin 5 Reflective foil 5 3 1 2 4

CONCRETE WALL 1 Concrete slab 2 Mass insulation 5 2 3 1 4 3 6 Reflective foil 4 Wooden purlin 5 Airspace 6 10 mm plasterboard

EXTERNAL FIBER BOARD WALL SYSTEM 1 Fiber board 5 2 Mass insulation 2 3 1 4 6 3 Reflective foil 4 Wooden purlin 5 6 Airspace 10 mm plasterboard

BRICK WALL SYSTEM 1 Brick wall 5 2 Mass insulation 2 3 1 4 6 3 Reflective foil 4 Wooden purlin 6 5 Airspace 10 mm plasterboard

End Of Presentation

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