Presentation on theme: "1 Heat Pumps And Underfloor Heating – A Match Made In Heaven? THE NATIONAL ENERGY FOUNDATION Ground Source Heat Pump Seminar 12 th May 2005."— Presentation transcript:
1 Heat Pumps And Underfloor Heating – A Match Made In Heaven? THE NATIONAL ENERGY FOUNDATION Ground Source Heat Pump Seminar 12 th 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 °C16 20 Radiator 0,1 m 1,7 m 24 °C ,1 m 1,7 m 24 °C ,7 m IdealUnderfloor
7 Just 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 Control Box Primary Pump 82°C Energy Source 72°C 35°C Min Flow Bypass
9 GSHP Control Principles
’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 O C 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)
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