Time to rethink heating Daikin Altherma Hybrid heat pump Iain Bevan, Daikin UK 1
Introduction 1. Introducing Daikin 2. Rethink Heating 3. How Hybrid works 4. Hybrid & drhi 5. Case Studies Retrofit 6. Hybrid, New Build & SAP 2
Section 1 Introducing Daikin 3
Introducing Daikin UK A leading supplier of heating, Cooling, Ventilation and Refrigeration Solutions A wholly owned subsidiary of Daikin Europe NV Manufacturing facilities within Europe and headquarters in Belgium A UK nationwide organisation (circa 225) Five regional sales and training centres National after sales service network Glasgow Birmingham Bristol Manchester Weybridge Woking 4
Daikin UK Why the Green Housing Forum? Home ownership is now at its lowest level since the 1980 s. With private rents soaring and more people priced out of buying a home affordable and social housing is crucial, so that everyone can have a place to call home Rachel Fisher, NHF Approximately 1 in 7 (17%) people currently live in social housing, however this has fallen from almost a third (31%) in 1980 1 in 3 working households (32%) in social housing are on housing benefit It is clear that all registered providers have similar objectives, issues and customer requirements Renewable technology has a key role to play in the provision of affordable heating for social housing residents Registered Providers have been the highest volume adopters of renewable technologies in the UK since their introduction Renewable technology manufacturers, suppliers, contractors and registered providers can work together to reduce carbon, provide affordable heat and hot water and improve health and well being for residents Green Housing Forum brings together social housing professionals to learn, share ideas and experience 5
Section 2 Re-think heating 6
UK domestic Heating applications New build Change radiators Renovation / Replacement Keep radiators Oil boiler replacement Gas boiler replacement 12% 8% 10% 70% 7
Daikin Altherma AWHP solutions for every application New build Change radiators Renovation / Replacement Keep radiators Oil boiler replacement Gas boiler replacement 12% 8% 10% 70% Daikin LT Daikin LT Daikin HT Daikin Hybrid 8
The opportunity for hybrid heat pumps Off gas 4 million On gas 21 million hybrid 9
Section 3 How hybrid works 10
The solution: Daikin Altherma hybrid heat pump Refrigerant gas Heating 11
The solution: Daikin Altherma hybrid heat pump DHW Refrigerant gas Heating 12
Two heat sources running seamlessly together MODE 3 Boiler only MODE 2 Hybrid MODE 1 Heat pump only Automatically managed by Daikin s intelligent control logic based on: Electricity price Gas price Ambient temperature Water temperature Heat load (kwh) Savings vs gas boiler Heat load -7ºC 0 15ºC Outdoor temperature (ºC) 13
Two heat sources running seamlessly together For homes connected to the gas mains or LPG DAIKIN ALTHERMA hybrid Always runs the cheapest source Compact No need to change radiators Eligible for Renewable Heat Incentive (RHI) 14
Switching logic The Daikin Way The Smart Way The Basic Way Energy price dependant Energy price dependant Optimised hybrid operation Fixed outdoor temperature 15
Gas boiler Running cost The Smart Way η = 90% PR gas = 0.05 /kwh What you buy 1.11 kwh 1 kwh What you use You pay : 0.056 / kwh 16
Heat pump Running cost The Smart Way COP = 4.0 PR elec = 0.15 /kwh What you buy 0.25 kwh 1 kwh What you use You pay : 0.038 /kwh 17
Heat pump Running cost The Smart Way COP = 2.5 PR elec = 0.15 /kwh What you buy 0.40 kwh 1 kwh What you use You pay : 0.06 /kwh Introduction The time Rethink How it works Hot water Installation Case study Hybrids & RHI Support The range 18
Section 4 Hybrids and Domestic RHI 19
Hybrids and drhi Hybrids are treated as a bivalent system Tariff rate the same as for standalone AWHP [Nov 2014 : 7.3 p/kwh renewable heat] Metering is required to prove the amount of heat generated from renewable sources System must include both heat meter and electric meter Maximum payment is based on the measured heat load 20
Example RHI Income estimate with natural gas House 1 House 2 Example : small house with heat pump delivering 65% 2,730 Example : Same house with heat pump delivering 50% 2,100 Assumptions Green Deal assessment 11,500 kwh SPF 3.5 Over 7 years No previous funding Heat pump delivers 65% System must be metered Assumptions Green Deal assessment 11,500 kwh SPF 3.5 Over 7 years No previous funding Heat pump delivers 50% System must be metered 21
Example RHI Income estimate with LPG House 1 House 2 Changing to LPG means the heat pump now delivers 80% but the SPF drops to 3.0 3,130 Changing to LPG means the heat pump now delivers 70% but the SPF drops to 3.0 2,740 Assumptions Green Deal assessment 11,500 kwh No previous funding Heat pump delivers 80% System must be metered Assumptions Green Deal assessment 11,500 kwh No previous funding Heat pump delivers 70% System must be metered 22
Section 6 Case Studies Retrofit 23
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Case study Retrofit Daikin Altherma hybrid heat pump 3 bed Semi-detached bungalow Gloucestershire 25
Case study Property details Social housing property 3 bedroom semi-detached bungalow 1960s prefab construction improved with external cladding and insulation in 2009 Floor area: 80m 2 Location: Gloucestershire Previous heating system: electric night storage heating 1 bathroom with electric shower 2 adult occupants Design heat loss: 5kW at -5 C Installed heat source: Daikin Altherma Hybrid heat pump (5kW) Heat emitters: new radiators Design flow temperature: 45 C at -5 C 26
Case study Summary Monitoring period: 1 st April 2014 to 31 th March 2015 Based on the Renewable Heat Energy produced by the heat pump, the RHI income was 113 Total Running cost of the Altherma Hybrid (SPH*): 144 Total Running cost if Gas Boiler only installation (SPH*): 178 Annual Running Cost Savings (SPH*): 19% Hybrid 2 Heat Pump Annual SPF Heat Pump Coverage* Boiler Coverage* Primary Energy Efficiency* RHI*** payment received Actual (Hybrid) Running Cost (SPH*) if Gas Boiler instead** Savings on running cost 3.4 63% 37% 104% 113 144 178 19% * SPH: Space Heating Only ** Gas price: 4p/kWh, Electricity price: 12p/kWh *** RHI tariff: 7.42 p/kwh 27
Case study System efficiency Monitoring period: 1 st April to 31 th March 2015 Heat pump SPF: 3.4 Annual Primary Energy Efficiency for Space Heating was 104% Heat Pump SPF 4 3.5 3 2.98 2.91 3.41 3.37 3.41 3.42 3.74 2.5 2 1.5 1.53 1 0.5 0 0.0 *No Space Heating demand during June to September ** In-situ monitoring of efficiencies of condensing boilers and use of secondary heating, DECC, 2009 28
Case study Retrofit Daikin Altherma hybrid heat pump 3 bed Semi-detached house Dorest 29
Case study Property details Private property 3 bedroom semi-detached Floor area: 73m2 Location: Gillingham, Dorset Previous heating system: Gas Boiler with hot water cylinder 1 bathroom Occupants: 2 adults and 2 children Design heat loss: 5.6 kw at -1.8 C Installed heat source: Daikin Altherma Hybrid heat pump (5kW) Heat emitters: old and new radiators Design flow temperature: 45 C at -1.8 C 30
Case study Summary Monitoring period: 1st May 2014 to 31th March 2015 Based on the Renewable Heat Energy produced by the heat pump, the RHI income was 142 Total Running cost of the Altherma Hybrid (SPH*): 256 Total Running cost if Gas Boiler only installation (SPH*): 284 Annual Running Cost Savings (SPH*): 10% Hybrid 2 Heat Pump Annual SPF Heat Pump Coverage* Boiler Coverage* Primary Energy Efficiency* RHI*** payment received Actual (Hybrid) Running Cost (SPH*) if Gas Boiler instead** Savings on running cost 3.1 48% 52% 98% 142 256 284 10% * SPH: Space Heating Only ** Gas price: 4p/kWh, Electricity price: 12p/kWh *** RHI tariff: 7.42 p/kwh 31
Case study System efficiency Monitoring period: 1st May to 31th March 2015 Heat pump SPF: 3.1 Annual Primary Energy Efficiency for Space Heating was 98% (Mean Combi Boiler Efficiency in Market is 82.5%)** Heat Pump SPF 3.5 3 2.5 2.45 3.04 3.24 3.25 3.15 2.99 2.97 2 1.5 1 0.5 0 May 0 Jun-Sept (No SPH) October NovemberDecember January February March *No Space Heating demand during June to September ** In-situ monitoring of efficiencies of condensing boilers and use of secondary heating, DECC, 2009 32
Section 6 Hybrid, New Build & SAP Retrofit 33
Modelling Altherma Hybrid in SAP BRE Calculations BRE In House Software House Type/Heat Source DER TER % Improvement Flat 60m2 Mains Gas Boiler 17.87 19.47 8.2% Flat 60m2 - AWHP 20.09 28.38 29.2% Flat 60m2 - Hybrid 16.15 19.21 15.9% Detached 100m2 Mains Gas Boiler 16.90 16.98 0.5% Detached 100m2 - AWHP 17.37 24.41 28.8% Detached 100m2 - Hybrid 14.75 16.61 11.2% Detached 400m2 Mains Gas Boiler 13.78 14.34 3.9% Detached 400m2 - AWHP 13.55 21.31 36.4% Detached 400m2 - Hybrid 12.04 14.20 15.2% 34
Modelling Altherma Hybrid in SAP Daikin UK Calculations NHER Plan Assessor v6 House Type/Heat Source DER TER % Improvement Detached 200m2 Mains Gas Boiler Detached 200m2 Mains Gas Boiler & 2kW PV 19.47 14.89 30.76% - 14.94 14.89 0.34% - Detached 200m2 - AWHP 14.48 21.75 33.43% Detached 200m2 - Hybrid 14.65 14.65 0.00% 35
Daikin Altherma heating range Daikin Altherma LT Monobloc > Suitable for heating installers (no F-gas) 6 8 11 14 16 kw > Space saving inside; only DHW tank inside the house Daikin Altherma LT Split > Small outdoor unit, wall hung indoor unit > Highest seasonal efficiency and part load > Designed for severe winter conditions Daikin Altherma HT Split > Flow temperature up to 80 C > Boier performance at heat pump efficiencies Daikin Altherma Hybrid > For gas / LPG boiler replacements > Combi boiler and AWHP combined 4 6 8 11 14 16 kw 11 14 16 kw 5 8 kw 36
Thank you 37