Kensa Heat Pumps Follow on training

Agenda  Introduction  Heat Pump Operation  Application  Design/MCS/ Pricing  Ground Arrays – unrolling and purging  Simple diagnostics and fault finding  Q&A, product viewing  Lunch  Introduction  Heat Pump Operation  Application  Design/MCS/ Pricing  Ground Arrays – unrolling and purging  Simple diagnostics and fault finding  Q&A, product viewing  Lunch

Heat Pump Cycle 3

4 Heat Pump Performance The efficiency of a heat pump is mainly governed by the outlet temperature

Heat Pump Performance Inlet temperature also can have an affect on COP 5

Heat Pump Efficiency Real-life efficiency is expressed as a SPF (Seasonal Performance Factor) which is a very complex calculation and is influenced by numerous factors quite distinct from the heat pump performance. Kensa’s heat pumps use Copeland scroll compressors, the most advanced available, and capable of providing the best available performance. Branding of the heat pump is not the critical factor in determining performance. Factors linked to the property and the site are far more influential. Ability to highlight the impact of some of these factors is helpful in gaining credibility with the client. Real-life efficiency is expressed as a SPF (Seasonal Performance Factor) which is a very complex calculation and is influenced by numerous factors quite distinct from the heat pump performance. Kensa’s heat pumps use Copeland scroll compressors, the most advanced available, and capable of providing the best available performance. Branding of the heat pump is not the critical factor in determining performance. Factors linked to the property and the site are far more influential. Ability to highlight the impact of some of these factors is helpful in gaining credibility with the client. 6 6

Domestic Heat Pumps R407CR134a SizeCompressorSizeCompressor 4kWSingle3.5 kWSingle 6kWSingle4.3kWSingle 8kWSingle6kWSingle 10kWSingle7kWSingle 12kWSingle8.5kWSingle 12kWTwin10kWSingle 16kWTwin12kWTwin 20kWTwin17kWTwin 24kWTwin20kWTwin 30kWTwin

Single Compressor internals

Twin Compressor Internals

Hybrid Heat Pumps 10 Single Phase Twin Compressor R407C and R134a 15kW and 21kW

Shoebox Heat Pumps 11

Traditional district scheme problems  Traditional schemes featuring a central boiler plant are not popular  Difficult to implement as a retro fit solution  Inefficient  Heat losses as hot water circulated through the “district”  Burdensome  HA has to manage billing  Bulky  Requires considerable space  Expensive  Requires back up system to eliminate risk of catastrophic district-wide failure  Traditional schemes featuring a central boiler plant are not popular  Difficult to implement as a retro fit solution  Inefficient  Heat losses as hot water circulated through the “district”  Burdensome  HA has to manage billing  Bulky  Requires considerable space  Expensive  Requires back up system to eliminate risk of catastrophic district-wide failure

Kensa micro-district solution  Individual heat pump at each dwelling  Linked to a communal ground array  New build or retro fit  Capital subsidy provided by Energy Company Obligation (retro fit)  Supported by 20 year income stream through the Non Domestic Renewable Heat Incentive  Technically robust solution  Myriad of operational and tenant fuel cost benefits over other solutions  Individual heat pump at each dwelling  Linked to a communal ground array  New build or retro fit  Capital subsidy provided by Energy Company Obligation (retro fit)  Supported by 20 year income stream through the Non Domestic Renewable Heat Incentive  Technically robust solution  Myriad of operational and tenant fuel cost benefits over other solutions

Kensa micro-district solution Ground source heat pump Kensa high temperature units, installed externally Ground source heat pump Kensa high temperature units, installed externally Micro district heating Individual gshp per property linked to a shared ground array serving 2+ properties Micro district heating Individual gshp per property linked to a shared ground array serving 2+ properties Technically robust Smaller number of deeper boreholes Flexibilty over borehole location No plant room or central pump Technically robust Smaller number of deeper boreholes Flexibilty over borehole location No plant room or central pump Energy saving Low cost, low carbon heating and hot water reducing energy bills Energy saving Low cost, low carbon heating and hot water reducing energy bills Scaleable solution Can be applied to apartment blocks or clusters of terraced or semi detached houses/bungalows, sheltered accommodation, holiday lets and more… Scaleable solution Can be applied to apartment blocks or clusters of terraced or semi detached houses/bungalows, sheltered accommodation, holiday lets and more… Renewable Heat Incentive 20 year income stream for district schemes under the non domestic RHI Renewable Heat Incentive 20 year income stream for district schemes under the non domestic RHI Energy Company Obligation (Retro fit) Attractive capital subsidy, especially when displacing electric heating Energy Company Obligation (Retro fit) Attractive capital subsidy, especially when displacing electric heating Simple billing No centralised billing – each tenant has control over own heating system and energy bill Simple billing No centralised billing – each tenant has control over own heating system and energy bill New Build New build developments are eligible for the non-domestic RHI New Build New build developments are eligible for the non-domestic RHI

Plant Room Modules to 75 kW per module. Combinations up to 1 MW and beyond

Application Application is critical If a heat pump fails we can fix it, but if the application is wrong Application is critical If a heat pump fails we can fix it, but if the application is wrong

Application - Exercise  Points to consider when installing a GSHP i.e. Type of fuel replacing  Points to consider when installing a GSHP i.e. Type of fuel replacing

Application How well insulated is the building? What type of heating? What fuel are we displacing? Floor Construction. Amount of glazing. Noise issues. Available heat source. How well insulated is the building? What type of heating? What fuel are we displacing? Floor Construction. Amount of glazing. Noise issues. Available heat source.

Insulation 19 The better you insulate your building : -  The lower the flow temperature required by the underfloor heating system to reach your target temperature  Therefore, the less the heat pump has to raise the temperature  And the more efficient the heat pump! The better you insulate your building, the more efficiently the heat pump will operate.

The better insulated the building 20 Smaller the heat pump required The less the digging/drilling required Lower the capital cost Lower the building ’ s carbon emissions Lower the energy bill

21 Heating Distribution Methods Underfloor  Ideal, large emitting area therefore low input temperatures.  Beware floor coverings and method of installation which might require the heat pump to operate at higher temperatures. Underfloor  Ideal, large emitting area therefore low input temperatures.  Beware floor coverings and method of installation which might require the heat pump to operate at higher temperatures.

22 Heating Distribution Methods Radiators  Need a higher temperature than underfloor due to the lower heat emitting area.  Might need oversized radiators as maximum temperature from the heat pump is approx. 50C. Radiators  Need a higher temperature than underfloor due to the lower heat emitting area.  Might need oversized radiators as maximum temperature from the heat pump is approx. 50C.

Mixing radiators and underfloor 23 Some want radiators upstairs, and underfloor downstairs Can this be done? Yes Depending on the floor construction, the temperature required by the radiators can be the same as the underfloor system! There is a delay between the radiators and underfloor feeling warm.  Zone valves are generally required.

24 Domestic Hot Water Production Can a heat pump produce DHW? Yes However, things to consider:- 1.Lower efficiency due to the higher required temperature 2.Increased ground array requirement as additional load on ground Can a heat pump produce DHW? Yes However, things to consider:- 1.Lower efficiency due to the higher required temperature 2.Increased ground array requirement as additional load on ground

DHW Production 25

Secondary Returns 26 Standard secondary returns cause the cylinder temperature to drop and due to the low temperature nature of heat pumps this temperature drop cannot be recovered

DHW Cylinders 27 Single or Twin Coils (Coil designed and sized for Heat Pump applications) 3kW Immersion Heater Expansion Vessel G3 Kit Stainless Steel tanks guaranteed for 25 years against leaks.

Inverted houses Bedrooms downstairs, living area upstairs. Depends on floor construction. Might need to run at higher temperatures and standard rate electricity. Bedrooms downstairs, living area upstairs. Depends on floor construction. Might need to run at higher temperatures and standard rate electricity.

Glazing Beware high areas of glazing. (even triple glazing only retains 1/3 rd of the heat a solid wall does) Will be cool in winter when cold ambient conditions. Additional heating such as log burners. Beware high areas of glazing. (even triple glazing only retains 1/3 rd of the heat a solid wall does) Will be cool in winter when cold ambient conditions. Additional heating such as log burners.

Noise Issues Keep the heat pump away from noise sensitive areas. Similar noise to an oil fired boiler or running dishwasher. Can install external to the building at the back of a garage or in a lean to. Keep the heat pump away from noise sensitive areas. Similar noise to an oil fired boiler or running dishwasher. Can install external to the building at the back of a garage or in a lean to.

Buffer Vessels Fitted to avoid short-cycling, i.e. which is where the heat generated during the minimum run time for the heating appliance (usually several minutes) cannot be absorbed by the buildings distribution system.

Buffer Vessels 2 connection buffer vessels are more efficient If close control of all temperature zones is not required then ‘open’ zones of the underfloor can be used as the buffer vessel.

Project Example – Sizing The Heat Pump 33 New Build Four Bedroom Detached Property with Garage

Sizing 34 Internal area – Ground Floor & First Floor Total Internal area = 224.6m2 Heat load = x 40w/m (If New Build) = 8984 = 8.98 kW

Budget Pricing

Budget Pricing

SAP Report - Line 37 Heat Loss Coefficient x Temperature Difference -2°C (Min) to 21°C (Max) = 23°C rise x 23 = 8704W = 10kW (39W/m) SAP sizing – Line 37!