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RESIDENTIAL HEATING & COOLING SEMINAR. AN INTRODUCTION TO TEMPERATURE CONTROL SYSTEMS. RESIDENTIAL HEATING & COOLING SEMINAR. SPEAKER AGENDA– 09.00 – 09.30 TONY HARBOUR, Technical Specifications Manager, REHAU Ltd. - PowerPoint PPT Presentation
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BuildingAutomotive
Industry
www.rehau.co.uk
RESIDENTIAL HEATING & COOLING SEMINARAN INTRODUCTION TO TEMPERATURE CONTROL SYSTEMS
BuildingAutomotive
Industry
www.rehau.co.uk
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
BuildingAutomotive
Industry
www.rehau.co.uk
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
BuildingAutomotive
Industry
www.rehau.co.uk
THANK YOU FOR YOUR ATTENTIONANY QUESTIONS?
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