Presentation is loading. Please wait.

Presentation is loading. Please wait.

Presentation Heading Air Source Heat Pumps Jordan Jeewood

Similar presentations

Presentation on theme: "Presentation Heading Air Source Heat Pumps Jordan Jeewood"— Presentation transcript:

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

2 What is an Air Source Heat Pump?

3 What is an Air Source Heat Pump?
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

4 What is an Air Source Heat Pump?
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 -5ºC 58ºC

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

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

7 Inverter Drive Technology
Duty (kW) Heat load Fixed speed Inverter 10 5 Refrigerant 410A offers good efficiency Inverter drive improves efficiency Inverter drive improves control Inverter drive reduces starting torque Inverter drive reduces stress on the electrical supply Inverter control system offers sophisticated diagnostics Time

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 Covers first 2.5 weeks in Jan (very cold).
First week sub average outside temp sub zero. Red and blue line – flow and return temps, demonstrates radiators are fine, space temp (red has been maintained even in these cool temps) Green = COP, significant increase in COP as outdoor temp rises above zero. Note average air temp in UK are 9.5. COPs of 3.5 should be easy to achieve in a well designed system.

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 Potentially over 16 million homes are suitable – new build and retrofit 14kW 8.5kW 5kW Since the 1970’s houses have increased the thermal efficiency quite dramatically. The heat loads are not the same, the graph shows the percentage decrease. 2 Bed Flat Bed Semi Bed Detached

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 Future proof Grid PV Hot Water Turbine Radiators mCHP Under floor

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

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

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 Heat Loss of a Dwelling Victorian House Minimum boiler output = 10.8kW
1970’s House Minimum boiler output = 6.6kW 2006 House Minimum boiler output = 3.9kW All 80m2 floor space, similar shape and -3oC outside, 22oC inside

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

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

27 Thank you Discussion

Download ppt "Presentation Heading Air Source Heat Pumps Jordan Jeewood"

Similar presentations

Ads by Google