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RESIDENTIAL HEATING & COOLING SEMINARAN INTRODUCTION TO TEMPERATURE CONTROL SYSTEMS

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RESIDENTIAL HEATING & COOLING SEMINARAN INTRODUCTION TO TEMPERATURE CONTROL SYSTEMS

SPEAKER AGENDA–

09.00 – 09.30 TONY HARBOUR, Technical Specifications Manager, REHAU Ltd.

09.30 – 10.00 RICK HUTCHINSON, Business Development Manager, MITSUBISHI Electric Europe B.V.

10.00 – 10.30 PAUL HEATLEY, Area Sales Manager, KAHRS Flooring

10.30 – 11.00 COFFEE / TEA Break

11.00 – 11.30 GARY AKERS, Technical Manager, St George West London

11.20 – 12.00 WILL GOLD, Design Engineer, REHAU Ltd.

12.00 – 13.30 Q&A session and Networking Lunch

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REHAU SURFACE HEATING & COOLING TECHNOLOGYAN INTRODUCTION TO TEMPERATURE CONTROL SYSTEMS

© REHAU

LEARNING OBJECTIVES

• About REHAU

• The UK UFH market

• Introduction to Underfloor Heating & Cooling

• Control Options

• Floor types

• PE-Xa pipe

AGENDA

© REHAU

REHAU COMPANY HISTORY

Private Company

- 1948 Founded in the Bavarian town of REHAU

- 1962 First UK Sales Office and Warehouse

opened in Slough- 1975 First Manufacturing Plant was

opened in Amlwch

- 1995 Opening of the new headquarters in Ross-on-Wye

- 2012 REHAU celebrated its 50th anniversary

trading in the UK

UK LOCATIONS

© REHAU

REHAU WORLDWIDE

6 CONTINENTS 174 LOCATIONS OVER 15,000 EMPLOYEES

THINK GLOBALLY – ACT LOCALLY

© REHAU

REHAU DIVISIONS

FURNITURE, HOUSEHOLD APPLIANCES, HOSES AND INDUSTRIAL DEVELOPEMENTS

EXTERIOR, WATER MANAGEMENT, AIR MANAGEMENT & SEALING

WINDOW AND CURTAIN WALLING TECHNOLOGY, BUILDING TECHNOLOGY, CIVIL ENGINEERING

UNLIMITED POLYMER SOLUTIONS

Building

Solutions

Automotive

Industry

© REHAU

THE UK UNDERFLOOR HEATING MARKETUNDERFLOOR HEATING AND COOLING

• Wet & Electric UFH included• Market grown since 2009• 5% of the UK heating market • £78m value in 2011• Est. £90m value by 2016• Non-domestic projects

account for 51% share • Emphasis on small flats &

apartments (49% share)• UFH can create up to 15%

more space in the property

© REHAU

UNDERFLOOR HEATING AND COOLINGENERGY REQUIREMENTS

• Energy requirements of a UK home can typically come from 40-50 W/m²

• Average family home (120-160m² ) requires 6-7kW• Optimum flow temperature for heating from heat pumps (≈ 35-40°C)• Optimum flow temperature for cooling is ≈ 16°C, possible to obtain

cooling directly from primary ground-source circuit, i.e. simple pump (no heat pump)

© REHAU

Domestic Heating Compliance Guide

- System temperature controls

- High limit thermostat

- Room temperature control

- Temperature control for each room

- Weather compensating controls should be installed

- Time control

- Dwellings with total usable area up to 150m²

- Dwellings with total usable area > 150m²

- Boiler control

- Boiler interlock

- SAP rating

UNDERFLOOR HEATING AND COOLINGBUILDING REGULATIONS – DOMESTIC HEATING COMPLIANCE GUIDE

© REHAU

BASIC PRINCIPLESUNDERFLOOR HEATING AND COOLING

Modes of heat transfer from human body

© REHAU

*

* Source: BSRIA APPLICATION GUIDE AG 12/2001

Thermal comfort

Since majority of the heat lost from the human body is due to Radiation, the comfort level derived from Floor Heating is greater than by Convection, due to the heat lost from the human body being replaced in the same way

Underfloor heating

Radiators

Radiation 60 % 30 %

Convection 40% 70 %Convection

Radiation

Thermal Comfort / Radiant Heat

BASIC PRINCIPLESUNDERFLOOR HEATING AND COOLING

© REHAU

UNDERFLOOR HEATING AND COOLINGTEMPERATURE PROFILES

© REHAU

- Fit Edge Insulation

- Lay Floor Insulation

- Tape Joints

- Tape Edge Insulation

- Site Manifold

- Lay Circuit

- Reverse Spiral

- Prepare Building

- Fill / flush

- Pressurise to 6 Bar

UNDERFLOOR HEATING AND COOLINGSYSTEM INSTALLATION

© REHAU

UNDERFLOOR HEATING AND COOLINGBENEFITS OF UNDERFLOOR HEATING

• Same comfort level at lower room temperatures > 15% to 30% potential saving in fuel costs*

• Reduces wasted heat at ceiling height > lower heat load

• Large heat emitter reduces heating water temperature > compatible with heat pumps / solar etc.

• Vertical temperature profile close to ideal profile > increased comfort level

• Even spread of heat across complete floor > high comfort level

• Silent and invisible heating system > high comfort level

• Air movement at a minimum > allergy friendly

• No radiator grills > freedom in space design & safe

• Virtually maintenance free system > no downtime

• No ventilation shafts, no covers > very low security risk (prisons, public

areas)

* Source:SEAV – ‘Operating Costs of Gas Appliances’ & Choosing a heating system’ / BSRIA Application Guide AG 12/2001

© REHAU

UNDERFLOOR HEATING AND COOLINGWHY COOLING?

- Over heating of residential buildings is even in UK climate conditions quite common for

the following reasons:

-High internal gains through people

-High internal gains through electrical equipment e.g. TV’s, Computers/Laptops etc.

-High solar gains

-Higher insulation of building

-Lower air leakage rates

© REHAU

UNDERFLOOR HEATING AND COOLINGPRINCIPLES OF UNDERFLOOR COOLING

Thermal comfort of a person is determined by:• The person’s activity• The person’s clothes• Air temperature • Air speed• Air humidity• Surface Temperature

Heat output of the human body occurs via three main mechanisms:

RADIATION EVAPORATION CONVECTION

© REHAU

Important factors which effect the cooling output

- Floor covering

- Pipe spacing

- Pipe dimension

- Floor Construction

- System

- Heat gains

UNDERFLOOR HEATING AND COOLINGSYSTEM DESIGN

© REHAU

- Lower thermal mass

- Chip board 25 mm

- Plaster board 25 mm

- Higher thermal mass

- Screed 65 mm

- Concrete 150 to 200 mm

Screed systems TABS systems

UFH system for joisted floors Chilled ceiling element

- Typical response times

- Screed (75mm) – 1 -1.5 hr/1°C

- Concrete (150mm) – 4 – 6 hr /1°C

UNDERFLOOR HEATING AND COOLINGTHERMAL MASS OF EMMITERS

© REHAU

Description Cross Section

Thickness Thermal

ConductivityResistance

OverallThickness

λmmd

W/mKRλB

M²K/WdWDmm

Carpet

Wood/Adhesive

Vinyl

Ceramic Tiles/Thin Mortar Bed

Ceramic Tiles/ Mortar Bed

Flagstones/Mortar Bed

10 0.07Max0.15

10

82

0.20.2

0.040.010.05

10

5 0.23 0.022 5

10 2

1.01.4

0.010.0010.011

12

1010

1.01.4

0.010.0070.017

20

1510

3.51.4

0.0040.0070.011

25

UNDERFLOOR HEATING AND COOLING

Typical “R” Values of Floor Coverings

SYSTEM DESIGN

© REHAU

UNDERFLOOR HEATING AND COOLING

• Typical 100-150mm pipe centres• 16mm x 1.5mm RAUTHERM Universal pipe• Flow temp 16ºC – Return temp 19ºC• With a surface temperature of 20ºC and room temperature of 26ºC – 32W/m² cooling can be

achieved.• IT IS RECOMMENDED THAT A FLOOR COVERING WITH A LOW THERMAL RESISTANCE IS

USED TO MAXIMISE THE COOLING OUTPUT (Tile, Slate etc.)

SYSTEM DESIGN

© REHAU

UNDERFLOOR HEATING AND COOLINGCOOLING CONTROLS

REHAU INTELLIGENT CONTROL SYSTEM -

HEATING & COOLING MODES:• Each zone controlled by a room sensor – continuously compares required room temp

with actual room temp• If room temp is too low or high it signals the actuator to open the return valve and allow

warm or cold water to flow into the circuit

SET-BACK MODE:• When leaving the house or at night, systems allows internal temp to drop to a lower level • In cooling mode it allows the internal temperatures to INCREASE• Makes the system respond quickly & efficiently

© REHAU

UNDERFLOOR HEATING AND COOLINGREHAU CONTROL OPTIONS

© REHAU

Underfloor Heating Controls with BMS Compatibility

Advantages

- Specifically designed for underfloor heating and

cooling

- Developed and tested software

- Remotely monitor and control UFH/C system

- Optimise running costs

- Install less sensors to do the same job

- Low cost option

BMS AND UNDERFLOOR HEATING CONTROLSUNDERFLOOR HEATING AND COOLING

© REHAU

REHAU STAR Control System

Advantages

- Cost Effective

- Easy to use

- Underfloor heating ONLY

- Reliable PWM used

- Valve protection system reduces maintenance

- Night setback can deliver savings of up to 30%

SUB-SURFACE HEATING / COOLING CONTROLSSTAR CONTROLS – FOR MULTI-OCCUPANCY PROJECTS

© REHAU

UNDERFLOOR HEATING AND COOLINGFLOOR TYPES OVERVIEW

DIFFUSION PLATE FLOATING FLOOR

RAUFIX TACKER SHEET

© REHAU

UNDERFLOOR HEATING AND COOLINGSYSTEM COMPONENTS

Base pipe made of PE-XaAdhesiveO2-Barrier coating made of EVAL Oxygen impermeabilityaccording to B.S 7291

Rautherm Universal Pipe

- Excellent thermal and chemical resistance

- Can withstand 6 bar at 95ºC

- Pipe ‘kinks’ do not damage the pipe and still

maintains 98% strength

© REHAU

- Made from Cross-Linked Polyethylene (PE-Xa)- Conforms to:

- WRAS- BBA Approved- BS 7291 - DIN 4726

Polyethylene Polyethylene Cross

linked

Rautherm Universal Pipe

UNDERFLOOR HEATING AND COOLINGSYSTEM COMPONENTS

© REHAU

- Nearly 1 billion installations worldwide – no

leaks!

- 10 year comprehensive loss warranty

- Fast and simple installation (60% quicker

than copper)

UNDERFLOOR HEATING AND COOLINGSYSTEM COMPONENTS

© REHAU

POLYMER CAN BE GREEN

Lower cost to the environment for production- No mining operations for the ore

- PEX pipe is chemically inert therefore highly resistant

to corrosion and lasts longer

- PE is abundant, created by refining operations

- Low energy cost to produce compared with copper

- No chlorine is used in production of PEX

Proven long life and durability- Provides value: Performance vs environmental cost

- Recyclable PEX can be ground up to inert “filler” e.g.

inert filler in asphalt, irrigation tube etc

ENVIRONMENTAL AND RECYCLABLE ISSUES

Other Consideration - Quiet operation

- Dampens water hammer, reduces pressure spikes that may harm equipment and fixtures - Does not add minerals to drinking water or to the public water system

© REHAU

Low energy windows / curtain walling

Ground-air heat exchanger

Ground-source probes/collectors

Stormwater management

District heating pipework

Underfloor heating/cooling

RENEWABLE ENERGY SOLUTIONSDOMESTIC APPLICATIONS

Rainwater harvesting

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THANK YOU FOR YOUR ATTENTIONANY QUESTIONS?