1 Heat Pumps And Underfloor Heating A Match Made In Heaven? Introduction Steve Alldritt Business Development Manager: Central Region Uponor Housing Solutions Ltd THE NATIONAL ENERGY FOUNDATION Ground Source Heat Pump Seminar 12 th May 2005 Nick Wincott Managing Director Eastern Heat Pumps Incorporating Screedmasters 2 Who Are We???????? Introduction 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 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 3 4 What are we trying to achieve? Radiator Ideal 2,7 m Underfloor HOW DO MODERN HEATING SYSTEMS WORK? 1,7 m 1,7 m 1,7 m 0,1 m 0,1 m 0,1 m C 16 20 C 16 20 C 16 20 UFH is very close to the ideal temperature distribution 5 6
7 How Does UFH Work? General Control Principles WTC Control Box Room Stat 82 C Primary Pump UFH Pump 40 C Flow Detector Energy Source Wirsbo Underfloor Heating 72 C Min Flow Bypass 35 C Just like one big low temperature radiator 8 GSHP Control Principles 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) 9 10 Modern Underfloor Heating Underfloor Heating / GHSP Design Principles Mainly warm water High tech plastic pipe in or just below floor Water is 45-60 O C Forms to suit most floor constructions Well proven controls Economical to run (Especially with GSHP) Reliable, long lasting Maintenance-free 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!!!! 11 12
13 Manifold cabinet & Thermostatic adjustment Solid Floor 100 W/m2 max (40-45 Flow) 14 Floor Cross Section Pipe set in place before screed is laid Carpet Tile Wood Screed Insulation Over site 15 16 Pipe positioning plate Clip Rail 17 18
19 Suspended Floor 70 W/m2 max (50-55 C Flow) Unifoil System 70 W/m2 (50-55 C Flow) 20 Floating Floor 70 W/m2 max (50-55 C Flow) Sports Hall Final floor covering 14mm pipe Heat emission plate Floating floor panel 21 22 Underfloor Heating / Cooling via GSHP 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 23
25 Five Areas of Energy Saving with UFH Advantages of UFH / GSHP No hot air in front of glass No hot air at ceiling level Lower air temperature for same comfort Uses lower water temperature Options to use Ground Source Heat Pumps = Less heat loss through window = Less heat loss through ceiling & walls = Reduced number of air changes = Lower transmission losses = Fuel saving economies 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 26 Other Advantages of UFH Other Advantages of UFH 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 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 27 28 BA Headquarters Heathrow Kingdom Hall 29 30
31 Ancient manuscript archive Pizza Express Restaurant 32 Why UFH / GSHP s Relevant to You Summary 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 Underfloor Heating today is:- clean and green comfortable invisible quiet safe energy-efficient maintenance-free 33 34 UPONOR HOUSING SOLUTIONS LTD 35