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Transcript of 1 Heat Pumps And Underfloor Heating – A Match Made In Heaven? THE NATIONAL ENERGY FOUNDATION...
1
Heat Pumps And Underfloor Heating – A Match Made In Heaven?
THE NATIONAL ENERGY
FOUNDATION
Ground Source Heat Pump Seminar
12th May 2005
2
Introduction
• Steve Alldritt Business Development Manager: Central
Region Uponor Housing Solutions Ltd
• Nick Wincott Managing Director Eastern Heat Pumps Incorporating
Screedmasters
3
Uponor• Net Sales Worldwide : 1.3 billion EUR• Sales to 100 countries worldwide• 27 production sites in 13 countries• 4800 employees
• Main Areas of Business• Heating & Cooling systems• indoor water systems (heating / potable)• Sewer & storm pipework• ground loop collector pipework
Who Are We????????
4
•Aims– Explain how underfloor Heating works.
– Examine advantages & disadvantages UFH used
with GSHP
•Outcome– Show how you and your clients can benefit from
UFH & GSHP
– Effect energy efficiency improvements
Introduction
5
HOW DO MODERN HEATING SYSTEMS WORK?
6
What are we trying to achieve?
UFH is very close to the ideal temperature distribution
0,1 m
1,7 m
24°C 16 20
Radiator
0,1 m
1,7 m
24°C 16 20
0,1 m
1,7 m
24°C 16 20
2,7 m
Ideal Underfloor
7Just like one big low temperature radiator
How Does UFH Work?
8
General Control Principles
UFH Pump
40°C Flow Detector
Wirsbo Underfloor Heating
Room
‘Stat
WTC ControlBox
Primary Pump
82°C
Energy Source
72°C
35°C
Min Flow Bypass
9
GSHP Control Principles
10
1960’s Underfloor Heating
• Mainly electric cable in thick concrete
floors
• Floor used as storage heater
• Poor controls
• Floors too hot (Uncomfortable)
• Inefficient (Generally poor insulation)
• Ineffective (Huge number of air changes)
• Ultimately unreliable (Expensive to run)
11
Modern Underfloor Heating
• Mainly warm water
• High tech plastic pipe in or just below floor
• Water is 45-60OC
• Forms to suit most floor constructions
• Well proven controls
• Economical to run (Especially with GSHP)
• Reliable, long lasting
• Maintenance-free
12
Underfloor Heating / GHSP Design Principles
• Ultimate performance from both systems• Perform Heat Loss Calculations• Match W/m2 from UFH with GSHP• Agree flow / return temps, depending on
floor constructions• Agree control strategy (i.e individual room
temperature control)
• Tel the customer what we can give him!!!!
13
Manifold cabinet & Thermostatic adjustment
14
Solid Floor – 100 W/m2 max (40-45° Flow)
15
Carpet Tile Wood
Floor Cross Section
Insulation
Screed
Over site
16
Pipe set in place before screed is laid
17
Pipe positioning plate
18
Clip Rail
19
Suspended Floor – 70 W/m2 max (50-55°C Flow)
20
Unifoil System – 70 W/m2 (50-55°C Flow)
21
Floating Floor – 70 W/m2 max (50-55°C Flow)
Floating floor
panel
Heat emission plate
14mm pipeFinal floor
covering
22
Sports Hall
23
Underfloor Heating / Cooling via GSHP
• Comfort cooling can be achieved by reverse cycling GSHP
• Cooling outputs of approx. 40 W/m2
• Flow / Return temperatures of 10/15°C
• Dew point control to avoid ‘Wet Floors’
• Heating / Cooling changeover controls
24
Underfloor Heating / Cooling Via GSHP
25
Five Areas of Energy Saving with UFH
•No hot air in front of glass
= Less heat loss through window
•No hot air at ceiling level
= Less heat loss through ceiling & walls
• Lower air temperature for same comfort
= Reduced number of air changes
• Uses lower water temperature
= Lower transmission losses
• Options to use Ground Source Heat Pumps
= Fuel saving economies
26
Advantages of UFH / GSHP
• Very comfortable– No ‘hot heads or cold feet’
– Does not promote floor draughts
– No drying of the air
– Reduced dust levels
– Beneficial to allergy sufferers, asthma etc
– Simplifies controls i.e. minimal mixing
required
• Unobtrusive– Walls left completely clear
– Floors and walls are easier to clean
27
• Quiet
– No creaks and groans, especially in solid floors
• Safe
– No hot surfaces - important to HSE
– No sharp edges to cause injury
– Ultimate low surface temperature radiator
– Nothing to vandalise
– In Sweden, only UFH is allowed, by law, in
children's nurseries
– Ultimate in ‘green’ energy
Other Advantages of UFH
28
• Complements other aspects of heating– Keeps options open for water heating
– heat pumps
• Cost effective installation– Less damage & less pilferage
– Installable in most stages of the construction
process
• Lower running costs– Low water temperature direct from GSHP
– Reduced installation problems
Other Advantages of UFH
29
BA Headquarters Heathrow
30
Kingdom Hall
31
Ancient manuscript archive
32
Pizza Express Restaurant
33
• Improving building insulation standards leads to
reduced heating requirements
• EU regulations on energy efficiency and pollution
require low temperature emitters such as UFH
• Options are kept open for green energy sources
based on low temperatures (heat pumps)
The UK is now to rediscovering
Underfloor Heating
Why UFH / GSHP’s Relevant to You
34
Underfloor Heating today is:-• clean and ‘green’
• comfortable
• invisible
• quiet
• safe
• energy-efficient
• maintenance-free
Summary
35
UPONOR HOUSING SOLUTIONS
LTD