Smartklub Leeds Presentation By Richard knights & Brian Gowthorpe of Arup @ Towerblocks 2.

1. Leeds City Council Tower Blocks
Proposed Heat Network & Energy Efficiency
Strategy
Richard Knights & Brian Gowthorpe
24 February 2016

2. The Brief

3. 3
1. Determine how best to connect to proposed city-wide Heat
Network – social housing focus
2. Determine a 10-year plan Tower Block investment to improve
energy efficiency, reduce bills and reduce carbon
• Brief was influenced by SmartKlub Tower Block workshop on
5th May 2015
Two Linked Parts

4. Connecting to Proposed City-wide
Heat Network

5. 5
Brief
• Find optimal solution
for heat network within
and around red line
• Focus on Housing Leeds
• Considered other
residential, social and
commercial
• Produce:
- concept design
- Performance spec
Connecting to Proposed City-wide Heat Network

6. 6
Connecting to Proposed City-wide Heat Network

7. 7
Connecting to Proposed City-wide Heat Network
Three networks
• Lincoln Green
• Stoney Rock
• Saxton Gardens

8. 8
Connecting to Proposed City-wide Heat Network
Lincoln Green
• New energy centre
• New heat network
• Conversion from electric

9. 9
Connecting to Proposed City-wide Heat Network
Stoney Rock
• New energy centre
• New heat network
• Connections to existing
• Conversion from electric

10. 10
Connecting to Proposed City-wide Heat Network
Saxton Gardens
• Existing energy centre
• Existing network

11. Tower Blocks Energy Efficiency
Strategy

12. 12
108 blocks = 7,238 flats
30 blocks - RERF DH
2 blocks – Clydes CH
12 basic archetypes
22 variants in total
LCC Tower Blocks

13. Priorities

14. Reduce fuel poverty – 10% + energy cost savings
With thanks to Warm Homes Oldham

15. 15
Reduce carbon emissions: 40% by 2020

16. 16
• Within the available Housing Revenue Account resources
Affordability
By Björn Laczay from Moosburg, Germany (Flickr) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

17. What we did

18. 18 Our Approach

19. 19
Shortlist of 13 potential interventions
Impact tested by thermal modelling
Different results for different archetypes
Workshop discussion
5 effective interventions recommended
Shortlisting Interventions

20. 20 Investment Planning Tool
1 2 3 4 5 8
SUMMARY
RoofInsulation
HWInsulation
ElectricHeating
CommunityHeating
HotWaterCylinders
Cladding(EWI)
TOTALCOST
£ £ £ £ £ £ £
Year 1
Net Cost 466,501 0 2,990,624 0 1,143,535 0 4,600,660
INFLATION 23,325 0 149,531 0 57,177 0 230,033
TOTAL 489,826 0 3,140,155 0 1,200,712 0 4,830,693
Year 2
Net Cost 260,886 0 1,234,862 0 530,788 0 2,026,535
INFLATION 26,741 0 126,573 0 54,406 0 207,720
TOTAL 287,627 0 1,361,435 0 585,193 0 2,234,255
Year 3
Net Cost 384,821 0 1,081,870 3,291,336 386,382 0 5,144,409
INFLATION 60,657 0 170,530 518,797 60,903 0 810,887
TOTAL 445,478 0 1,252,400 3,810,133 447,286 0 5,955,297
Year 4
Net Cost 406,326 0 2,003,463 3,649,165 715,523 0 6,774,476
INFLATION 87,566 0 431,759 786,418 154,200 0 1,459,942
TOTAL 493,891 0 2,435,222 4,435,583 869,722 0 8,234,418
Year 5
Blocks Postcode Type Storeys No. of Flats GIA m2 Perimeter Envelope Area m2 Plan Area m2
MOOR GRANGE COURT(1-61) LS16 5ED Townsen Unclad 10 60 4,472 131 3,537 461
CLYDE COURT(1-100) LS12 1XN Clydes Unclad With DH 17 99 8,839 129 5,921 536
CLYDE GRANGE(1-100) LS12 1XD Clydes Unclad With DH 17 98 8,839 129 5,921 536
OATLAND COURT(1-101) LS 7 1SE Shepherd Unclad - OS 17 100 8,905 99 4,544 540
OATLAND HEIGHTS(1-101) LS 7 1SQ Shepherd Unclad - OS 17 100 8,905 99 4,544 540
OATLAND TOWERS(1-101) LS 7 1SA Shepherd Unclad - OS 17 100 8,905 99 4,544 540
MEYNELL HEIGHTS(1-100) LS11 9PX Wimpey H Block Unclad - OS 17 98 8,806 127 5,829 534
CARLTON CLOSE(1-47) LS 7 1HJ Wimpey High Rise Unclad - OS 12 46 3,771 72 2,333 324
CARLTON CROFT(1-47) LS 7 1HF Wimpey High Rise Unclad - OS 12 44 3,771 72 2,333 324
CARLTON GARTH(1-47) LS 7 1HL Wimpey High Rise Unclad - OS 12 46 3,771 72 2,333 324
TORRE GARDENS(1-61) LS 9 7RN Myton (Newland) Unclad - RERF 10 60 4,966 128 3,456 512
TORRE GREEN(1-61) LS 9 7RL Myton (Newland) Unclad - RERF 10 60 4,966 128 3,456 512
LAKELAND COURT (1 - 60) LS15 0BY Reema Clad 10 58 4,472 131 3,537 461
ALDERTON HEIGHTS(122-181) LS17 5LS Reema Unclad 10 60 4,472 131 3,537 461

21. Energy efficiency strategy - findings

22. 22
Intervention Priority
(1 is high)
Commentary
Community heating
systems
1 The projected savings in regulated energy bills (27%-31%) and carbon
emissions (57%-59% or about 3,200 tonnes/CO2 p.a.) are considerable
compared with existing electric heating and hot water systems.
New hot water cylinders 1 Major savings to 40 blocks. High proportion of the energy costs for all-
electric flats. This intervention shows very good savings in carbon
emissions (12%-18%) but the projected energy bill reduction is even
greater (13%-25%) because of the favourable tariff.
New electric heaters and
controls
2 Relatively modest savings (3%-9%) but important for all-electric flats.
Hedge against future energy price rises. Further savings potential from
controls/behaviour.
Cladding (external wall
insulation)
2-3 High priority for inefficient deck access blocks. Permanent reduction of
heat demand. For the priority blocks this intervention shows very good
levels of savings in carbon emissions (18%-32%) and energy bills (16%-
30%).
Increased roof insulation 4 Cost relates to top floor flats only where fuel poverty is greatest. To be
dealt with as part of roof re-covering under planned maintenance. Carbon
and energy cost savings for these flats are estimated at 3%-5% but, if new
heating controls are used effectively, individual tenants could potentially
achieve greater savings.
Recommended Interventions

23. 23
Intervention No. of
Blocks
Flats
treated
Commentary
Cladding (external wall
insulation)
14 960 Selected for the least energy efficient blocks that are unsuitable for connection
to district/community heating schemes. It is also recommended that, if
possible, the two remaining untreated electrically heated blocks with high
energy bills should also be clad at a cost of a further £2m. (Beevers Court and
Norman Towers)
Community heating
clusters
26 1,483 6 new gas-fired heating clusters are proposed generating the highest savings
of any of the interventions. Minimum of 3 blocks per cluster.
Replacement electric
heating
38 2,462 Greater control and more efficient systems. Restricted savings but beneficial
for blocks that cannot connect to communal systems.
Replacement hot water
cylinders
40 2,589 More efficient, better insulated, can run on Economy 7, for blocks that cannot
connect to communal systems.
Additional roof
insulation
38 210 Remedies levels of higher fuel poverty/carbon emissions in top floor flats.
Planned to coincide with cyclical renewal of roof coverings. All blocks
assumed likely to have some insulation already.
Totals - 4,180 This represents 58% of all the flats in the study. Some blocks/flats benefit
from more than one investment.
Investment Strategy
In addition the RERF district heating scheme and the Clydes community heating scheme will greatly reduce energy bills
and carbon emissions in relation to the 2,218 flats in these blocks (31% of flats in the study).

24. 24
10-year energy efficiency investment programme
• 4,180 flats would benefit (58%)
• Remainder are in energy efficient blocks
• Or to be connected to community/district heating networks
• Potential carbon saving up to 36%
• This represents a 30-year carbon saving of 175,000 tonnes
• Average energy bill saving of up to 28% or £185 per year
Community & district heating networks
• 2,218 flats would benefit
• Potential saving of up to 71% in carbon emissions (Clydes)
• Potential saving of up to 88% in carbon emissions (Heat Network)
Potential outcomes

25. What’s left to do

26. 26
• Confirm funding
• Install block level energy meters/measure current consumption
• Develop specifications
• Engage with contractors & supply chain
• Develop the recommended procurement plan/new framework
• Procure early projects
Next Steps – Implementation Stage