ulster.ac.uk COLERAINE DISTRICT ENERGY SCHEME 13 th September 2016
ulster.ac.uk
COLERAINE DISTRICT ENERGY SCHEME
13th September 2016
IntroductionEnergy costs for business in NI
Luxembourg
Sweden
Finland
Greece
Netherlands
Belgium
France
EU 15 M
edian
Austria
DenmarkSp
ain
Portugal
Ireland
Germany NI
Italy UK
0.00
2.00
4.00
6.00
8.00
10.00
12.00
1.80
5.406.60
7.90
9.70
L&VLEU
p/kW
h
Project KelvinTrans-Atlantic data link
IntroductionBackground to the project
• Causeway Coast & Glens Borough Council• Kelvin Link• Smart Energy Programme• Local scheme for cheaper business energy• Overcome obstacles• Power, heating, cooling• CASE/Invest NI funding
System overviewHigh level
• Energy system characteristics• Expensive for business• Wind power• Heat demand• 2020 targets• RHI• Developing a Secure Sustainable System (DS3) – 75%• Curtailment (277 GWh – 4.1%)• Negative pricing
System overviewCurtailment 2014
System overviewNegative pricing 12th September 2016
0:00
6:00
12:0
0
18:0
0
0:00
-100
-50
0
50
100
150
SMP EUR/MWh
€/M
Wh
Power to heatEnergy system integration
• Power system generation variability• Electricity 19% of total energy demand• Heat 50% of total energy demand• Manage very high VRE penetration using heat• Cost of storage• Large scale WSHP• River Bann
Heat sourceRiver Bann
Proposed technologyWater Source Heat Pump
Drammen heat pumpStar Renewable Energy
• 25km heat network
• Flow 85-90°• Return 55-60°• Water/glycol mix• 20 bar operating
pressure (rated to 50 bar)
• COP = 3.15• Refrigerant –
R717 (NH3)
Feasibility StudyObjectives – CIBSE Code of Practice
1. To achieve sufficient accuracy of peak heat demands and annual heat consumptions
2. To identify the most suitable low carbon heat sources and location of an energy centre
3. To select suitable operating temperatures4. To define heat network routes, pipe sizes and costs5. To determine the location of top-up and standby boilers
and use of existing boilers6. To conduct a consistent economic analysis & options
appraisal
Coleraine Heat NetworkLoads
Month Hospital Kerry WD Meats Pool Combined
Annual total 9088 7943 4642 2909 24582
Min load
454 386 271 121 1472
August October January July August
Max load
1183 780 449 325 2485
January January July February February
Coleraine Heat Network – Phase 1Anchor loads
January
February
March
AprilMay
JuneJuly
August
September
October
November
December
0
500
1000
1500
2000
2500
3000
Hospital Kerry WD Meats Pool
MW
h
Proposed systemPhase 1
• c. 1 (?) MW WSHP• c. 0.5 (?) MW
electrode boiler• Heat store• Back-up boilers
(gas/oil)• c. 2.5km heat network
Proposed system
LOAD25-40 GWh
Networkc. 2.5km
IncomeOption 1 – self control with retailer
• Heat sales• Simple supply agreement with retailer on pool price pass-
through tariff (moving to DAM ref price)• Optimise load shape by combining load diversity and
storage – basically ask retailer for a shape which is inverse of price curve
IncomeOption 2 – self control with retailer
• Heat sales• Simple supply agreement with retailer on pool price pass-
through tariff (moving to DAM ref price)• Optimise load shape by combining load diversity and
storage – basically ask retailer for a shape which is inverse of price curve
• Discuss constraint alleviation with NIE and local windfarms. Bilateral deal to increase demand during local network constraints
IncomeOption 3 – SONI (innate response only)
• Heat sales• Utilise innate response of continuous load to deliver;
• FFR• POR• SOR• TOR1
• Need to go through testing procurement process now underway
• Network remains under full control of owner/operator
IncomeOption 4 – SONI (grid-dispatchable)
• Heat sales• Provide longer term operational reserve, from TOR2 –
RM8• Potential for long periods with electrical loads offline• SONI-controlled
IncomeOption 6 – contrived load on demand
• Heat sales• DS3 aims to pay back some of the value of reduced
curtailment• However, no “shift consumption”/”consume now” product• Compare with BETTA • Possible through electrode boiler energy market play
Phase 1Scenarios
SCENARIO 1 2 3 4 5
Hot Water Outlet Temperature (Deg C) 80 75 70 65 60
Hot Water Return Temperature (Deg C) 60 55 50 45 40
Heat Capacity (KW) 1803.9 1881.3 1963.5 2058.4 2205.4
Cooling Capacity (KW) 1159.6 1284.2 1406 1535.2 1704.2
Shaft Power Required (kW) 640.8 594 554.7 521 499.4
Driver Motor and inverter inefficiency 679.8247 630.1746 588.4812 552.7289 529.8135
Hot Water Flow (kg/s) - Required 21.53 22.469 23.464 24.609 26.375
Hot Water Pipe Size 125 125 125 125 125
Water Source Flow (kg/s) - Required 91.92 101.797 111.449 121.691 135.088
Water Source Pipe Size (NB) 250 250 250 250 250
Source Pump Power (kW) estimated 39 42.6 47.9 53.6 62.6
Number Of Units Running 2 2 2 2 2
Dissemination
• DETI - Ministerial Energy and Manufacturing Advisory Group
• UU Interreg Proposal• EU Urban Innovations Actions• H2020 Proposals• Westminster Northern Ireland Affairs Committee
Questions?