Air-to-water heat pumps:
Making the most of renewables
Richard Pickford, Daikin UK
1
Overview
1. ASHPs potential
2. Heat pump system design
3. Installation best practice
4. Renewable Heat Incentive
5. Conclusions
2
Section 1
ASHP potential
Energy efficiency
Lower fuel bills
Reduced carbon emissions
Wide applications
Help and advice
Section 1
Section 2
Section 3
Section 4
3
What air-to-water heat pumps
ASHP POTENTIAL
Can help you achieve
Revolutionise the energy efficiency of your housing stock
Lower tenants’ fuel bills - alleviating fuel poverty
Upgrade tenants’ heating systems
Reduce running carbon emissions from homes
4
ASHP POTENTIAL
UK domestic
Heating applications
Renovation / Replacement
New build
Keep radiators
Change radiators
12%
8%
Oil boiler replacement
Gas boiler replacement
10%
70%
5
ASHP POTENTIAL
Daikin Altherma
AWHP solutions for every application
Renovation / Replacement
New build
Keep radiators
Change radiators
Section 1
12%
8%
Daikin LT
Daikin LT
Section 2
Section 3
Section 4
Oil boiler replacement
Gas boiler replacement
10%
70%
Daikin HT
Daikin Hybrid
6
ASHP POTENTIAL
How
Daikin can help
Full range of solutions for new build and
refurbishment programmes
Design and selection advice
Tenant presentations and consultations
Link to local Green Deal Assessors
Guidance on RHI funding applications
Provide installer and bespoke tenant training
7
Section 2
Heat pump system design
Location
Sizing
Insulation
Performance
Running costs
Section 1
Section 2
Section 3
Section 4
8
HEAT PUMP SYSTEM DESIGN
Where is a
Heat pump suitable?
Heat pumps can be fitted to both new or existing
housing
However the considerations vary widely depending on
the property type and location
As with any heating system, care should always be
taken when specifying an air source heat pump
Best practice recommendations should always be
followed
www.energysavingstrust.org.uk
Very high
insulation
9
HEAT PUMP SYSTEM DESIGN
Sizing the heat pump
Important factors
Geographical location
Size / type of building
Construction materials
Other heat sources
Hot water requirement
10
HEAT PUMP SYSTEM DESIGN
Sizing the heat pump
Important factors
MCS installer standard (MIS3005)
Heat loss calculations (BS EN 12831)
Geographical location
Daikin Altherma Selection Software
Energy and carbon savings
11
HEAT PUMP SYSTEM DESIGN
Reduction in heat loss due to
Improved insulation
Scenario 1
• 90m2 semi-detached
•
•
•
•
Unfilled cavity wall
Single glazed windows
<50mm loft insulation
0.7 air changer per hour
10.02kW heat loss
Scenario 2
• 90m2 semi-detached
•
•
•
•
Filled cavity wall
Double glazed windows
>75mm loft insulation
0.7 air changer per hour
56%
reduction
4.72kW heat loss
12
HEAT PUMP SYSTEM DESIGN
Coefficient of
Performance
Important notes about COP
>
Varies depending on operating conditions,
e.g. ambient air temperature and design
flow temperature
>
COP decreases with increasing flow
temperature
>
It’s important to use the right dimensioned
heat emitter to maximise efficiency
13
HEAT PUMP SYSTEM DESIGN
Heat pump
Performance
14
HEAT PUMP SYSTEM DESIGN
Heat pump
Running costs
Comparison of running costs for different heat sources
Annual running cost
for space heating (£)
800
700
600
500
400
300
200
100
0
Daikin Altherma
AWHP @ 45
Daikin Altherma
Oil Boiler
AWHP @ 50
Heating Source
Direct Electric
Heating
15
Section 3
Installation best practice
Competency
Positioning
MCS standard
Section 1
Section 2
Section 3
Section 4
16
Installer
INSTALLATION BEST PRACTICE
Competency and requirements
Although every application is different, the
installer must ensure that he is suitably qualified
and competent in all aspects of the system design
and installation.
>
Refrigeration installation
>
Hot water installation
>
Electrical Installation
>
MCS Accredited
>
Ensure the installer is traiined on product
selected
17
INSTALLATION BEST PRACTICE
Installation of outdoor unit
Positioning
When installing the outdoor unit, the following
points should be considered:
>
Safe?
>
Access?
>
Discharge route?
>
Noise?
>
Drainage?
18
Key to a successful
INSTALLATION BEST PRACTICE
Air source heat pump project
Ensure the properties are sufficiently insulated prior to considering installing a
heat pump
Consider the location of the outdoor unit
Installer selection and training
Ensure the heat pump is designed and installed to the current MCS standard
Ensure radiators are correctly sized to the design running conditions of the
heat pump
Select a manufacturer who has a high efficiency heat pump for all weather
conditions and will be low maintenance for future years
Ensure heat pump is easy to control and is suitable for all life styles
Education for both staff members and tenants in operation of heat pumps is vital
to ensure a smooth project
19
INSTALLATION BEST PRACTICE
MCS
Heat Pump Installer Standard MIS 3005
Standard includes all design and installation information
Heat loss
calculations
The 100%
rule
Bivalent
systems
The Heat
Emitter Guide
20
Section 4
Conclusions
Section 1
Section 2
Section 3
Section 4
21
Conclusions
CONCLUSIONS
Choose the right solution
Choice of heat pump
Sizing and location suitability
Quality installations
Training
Stakeholder communications
22
Thank you
23