ulster.ac.uk

COLERAINE DISTRICT ENERGY SCHEME

13th September 2016

Dr Patrick Keatley

Centre for Sustainable TechnologiesUlster University

p.keatley@ulster.ac.uk

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?