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Presentation Heading Jordan Jeewood Heating Technical Executive Air Source Heat Pumps.

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Presentation on theme: "Presentation Heading Jordan Jeewood Heating Technical Executive Air Source Heat Pumps."— Presentation transcript:

1 Presentation Heading Jordan Jeewood Heating Technical Executive Air Source Heat Pumps

2 What is an Air Source Heat Pump?

3 Refrigeration circuit used to heat water – fridge in reverse Sealed refrigerant unit outputs hot water – outdoor unit Plate heat exchanger transfers energy from hot refrigerant to water What is an Air Source Heat Pump?

4 Produces hot water 25-58ºC – heating only 5kW, 8.5kW, 14kW Mitsubishi Electric Ecodan – domestic market No need for refrigeration qualification to install Approved Ecodan Installers – plumbers and heating engineers What is an Air Source Heat Pump? 58ºC

5 R410A refrigerant Very efficient way to heat water ~ % For every 1 unit of energy put in, 3 useful units of energy out – high COP What is an Air Source Heat Pump?

6 Inverter driven compressor and fan Weather compensation These technologies lead to greater efficiencies Heat pump technology Inverter Compressor Inverter control PCB

7 Heat load Fixed speed Inverter Duty (kW) Time Inverter Drive Technology

8 Weather Compensation Heat load of property reduces as ambient temperature increases

9 Weather Compensation Reducing flow temperature matches output of boiler to heat load

10 Weather Compensation Heat pump has to draw less power to output lower flow temperatures COP increases

11 Weather Compensation

12 UK Market Size – Domestic Heating 60 million people 26 million homes 1.6 million heating systems replaced / yr 85% gas boilers 4.5 million homes – off gas grid 4.7 million social housing

13 Why now? Cost effective Reliable and maintainable as existing systems Scalable solution that can be easily adapted for the whole country Future proof Has to be absolutely acceptable to homeowners in terms of space, noise and usability

14 Cost effective Payback period typically 5-10 years compared to oil, LPG, electricity Payback period will decrease as: Fossil fuels increase in price The Technology becomes more commoditized Manufacturing costs are decreased through economies of scale Introduction of Renewable Heat Incentive (2012)

15 Reliability & Maintainability Proven technology – air conditioning units used for years Minimal servicing needed – like a fridge Essentially a visual inspection, heat exchanger to be kept clean Hot water to clean the coil and brush to remove debris e.g. leaves

16 Scalability 2 Bed Flat 3 Bed Semi 4 Bed Detached 5kW 14kW 8.5kW Potentially over 16 million homes are suitable – new build and retrofit

17 Scalability Geographically and seasonally independent Manufactured in Scotland National distribution network – already in place through aircon Supporting Approved Ecodan Installers all over UK

18 Grid PV Turbine mCHP Future proof Hot Water Radiators Under floor Heating

19 Acceptable to homeowners No change in lifestyle or comfort level Capable of providing both heating and hot water requirements for a property all year round – tank can be heated to 55ºC Radiators and underfloor heating Use of standard domestic heating controls Quiet unit operation – typically 48dBA

20 Applying Air Source Heat Pumps

21 Radiators or underfloor heating can be used Heating and hot water separate – S Plan plumbing Integrated like conventional boiler system Heat pump positioned externally DHW cylinder supplying shower etc. Supplies space heating via underfloor or rads Applying Air Source Heat Pumps

22 Zone valves Pump Boiler buddy Flow setter Pump S Plan System All fitting on cylinder package Applying Air Source Heat Pumps

23 Principals of Heat Pump Sizing Heat Loss from Dwellings: Fabric Heat Loss Ventilation Heat Loss Heat pump should be sized on peak heat loss of dwelling

24 Victorian House Minimum boiler output = 10.8kW 1970s House Minimum boiler output = 6.6kW 2006 House Minimum boiler output = 3.9kW All 80m 2 floor space, similar shape and -3 o C outside, 22 o C inside Heat Loss of a Dwelling

25 3 Points to consider: 1.Water flow temperature through emitter 2.Peak heat loss of room 3.Space to locate emitter Desired Room Temperature = 20 o C Mean Water Flow Temperature = 40 o C Emitter Selection

26 Site survey is required for accurate heat loss calculation Applying Air Source Heat Pumps

27 Thank you Discussion

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