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Biomass Heating SystemTralee, Ireland

Nick Fazio and Abhishek Bodkay

Project Overview

Location:Tralee, Ireland

Implement year: 2008 (Phase 1) - Tobar Naofa,

Cooperated organization:Kerry County Council a multi-agency in partnership with core community involvement proposed to establish an Energy Efficient Self-Sustaining Region for Tralee, through a twin track program beginning with energy conservation of both commercial and domestic premises followed by the development of biomass energy centers meeting identified demand, using locally produced biomass.

Background: Tralee was selected as a neighborhood in decline due to the disinvestment of the manufacturing sector. Businesses moved out of the neighborhood due to poor competitiveness and high energy costs. Kerry County Council and Tralee Town Council formed a strategy to establish Tralee as an energy efficient self-sustaining region transforming the local economy through job creation and achieving a high standard of living. A biomass district heating system was a key strategy in achieving their goals. Sources: http://www.seai.ie/Publications/Renewables_Publications_/Bioenergy/The_Mitchels_Boherbee_Regeneration_Project.pdf

System Type:Biomass Heating System

Area managed:Entire Site - 10Ha Block (24 Acres)Tobar Naofa – 2.5 acres

Estimated Cost of System Implementation:Project recouping 6.5 million Euros from the department of Environment, community and local government. The grant of 81,000 Euros from SEI under the ReHeat Programm.

Job hours devoted to the project:The first phase took 4 years to implement.

Stakeholders:Tralee Town Council Statutory and Non-Statutory Agencies in TraleeMitchels Regeneration Steering Group Department of the Environment

Sources: http://www.seai.ie/Publications/Renewables_Publications_/Bioenergy/The_Mitchels_Boherbee_Regeneration_Project.pdfhttp://www.kerrycoco.ie/en/allservices/codevelopmentboard/news/thefile,6558,en.pdF

Project Overview

Climate

Climate Type:Temperate Oceanic

Climate

Sources: http://www.foreca.com

Location Los AngelesAtwaterVillage

Oros Street

Tralee Town Council is the administrative

centre for Tralee (with a population of almost

23,000), the capital town of Kerry County

and Ireland’s 7th largest town. It is a

bustling commercial, tourism and

educational centre, the seat of local

government, and a regional transport

hub.

SiteTobar Naofa

brown field site with high density housing,

within walking distance of Tralee

town centreArea: 2.5 acres

Sources: Kerry County Council Submission on Proposal for a Sustainable Energy Community


View of the

HousingTypology

The biomass heating system is a centralized production of heat and the distribution of that

heat through a network of insulated pipes. The system is fueled by locally grown and

harvested wood fueled. The network to each apartment block providing temperature

controlled space heating and instant hot water on demand at low cost.

The initial development had the installation of 1 MW wood chip fueled district heating system

with heat pipes connected to each apartment providing controlled space heating and meeting

all the hot water needs at a low cost. Completed at the end of 2011 the district

heating system comprises of 2500Kw Hertz wood chip boilers each with an auger feed

system from the fuel store. The boilers operate on a duty/assist control and are linked to 2

5,000 liter thermal store buffer tanks. They are all housed in the central plant room.

System Description

Sources: http://www.dulas.org.uk/images/elements/misc/how_does_biomass_work.jpg

Sources: http://www.seai.ie/Publications/Renewables_Publications_/Bioenergy/The_Mitchels_Boherbee_Regeneration_Project.pdf

Site1 MW supplies

heat to:

100 housing units

11 # “TowardsCarbon Neutral”

Houses

7# B1 houses

Moyderwell National School

County LibraryIntegrated Services

Building

Day careCenter


Plant Room and Wood

Chipper Boiler• Two 500kW Hertz

Wood Chip Boilers each with an auger

feed system from the fuel store.

• The boilers which operate on

duty/assist control are linked to two

5,000l thermal store buffer tanks.

• Distribution header with separate

branch, pump and district heat pipe for each block of apartments and

spare connections for future demand


Wood Chip Conveyor and

Store• The Wood Chip is

unloaded into the underground

conveyor.• The Chip is then transferred into the

80m³ Fuel Store.• The Chip is then transferred into the

80m³ Fuel Store.


District Heating System

Sources: http://www.seai.ie/Publications/Renewables_Publications_/Bioenergy/The_Mitchels_Boherbee_Regeneration_Project.pdf

District Heat Pipe Network to each apartment block providing temperature

controlled Space Heating and instant Hot Water on demand at low cost.

Supplying water at 80 Degree Celsius throughout the development

Heat Distribution SubstationHeat exchanger for instant hot water with anti-

scald control.Under floor heating manifolds with circulating

pump and temperature limiting control.Time clock to control space heating times.

Heat Meter measuring Kilowatt Hours.Pre-Payment Card System linked to an isolating

valve.


Under floor HeatingEnergy efficient uniform heating throughout the

apartment.Under floor network designed to operate at low

temperature 35ºC.Heat thermostatically controlled in each unit.

Heat store is built up gradually - no peak demands on Boiler Plant

Heat MeterThe kWh heat output from the Boiler Plant is recorded

on the Heat Meter.The Wood Chip Supplier records the reading at each

delivery for billing purposes.The Supplier bills the Council on kWh of heat

produced.North Kerry Wood Chip, Knocknagashel, is the present

fuel supplier.


Fuel Supply

Annual Demand 115 ton Wood Chip

< 25% moisture content

346 MW/hr Produced 3.01 MW/hr per ton

8,230 kWh per Apartment

€291.00 per Annum

Biomass Resource

• 55,000 ha of forest plantation in Kerry (11.6% of County area)

• 35,500 ha (65%) is in private ownership

• 1400 local farm families involved

• Average holding 9 ha

• 10% of National Plantation Target being achieved in Kerry.



http://www.seai.ie/Publications/Renewables_Publications_/Bioenergy/The_Mitchels_Boherbee_Regeneration_Project.pdf

• Re-use of a brown field site, job opportunities, and reduction in energy demand of residents.

• Renewable resource- wood chips fuel the District heating system which is also sourced locally.

• The Regeneration project is designed to SEI (sustainable Energy Ireland) which has improved their standard of insulation from 2005 by 40%.

• Units in the development have special features such as pv solar, rain water harvesting.

• Tralee Town Council will save up to one ton of carbon based on fuel type used and save over 100,000 Euros a year in fuel bills. Additional metered heat will be sold to adjoining school, Library, 11# low carbon homes, existing 12 # units and integrated services building.

Thinning will give 25%more income to

farmers.50,000 meter cube of

woodchip per annum is available.

Could generate 26,000MWh of heat

and 6,000 MWh of electricity with Biomass

Combined Heat and Power.

Displace over 3.5 million liters of oil

which costs over €2.8million.

If oil is used as a fuel 80% of the money

generated goes out of the Country, while with

wood-chip 90% of the money generated stays

in the County.

Benefits

• Average retrofitting cost per unit will range from €2,000 to €10,000

• Grants and tax relief are available for private houses with the balance being made up through the proposed Pay As You Save Scheme

• This will be recouped from the potential savings of €1000 -€1500 on energy cost per unit per year, over 3 to 5 years

• Potential savings €1000 - €1500 on heating and hot water cost per unit.

• Average insulation cost per unit is €9,540

“Pay As You Use Pre Payment System” will provide the following benefits to the householder

• Addressing the issue of fuel poverty • Control over their budget • No bulk purchase of fuel required • Energy Awareness Tool. • Hot water and heating on demand • Increased comfort level at reduced cost Pay As You Use

(Prepayment) already in use in 200 houses in Tralee and 60 in Killarney

Pay as you use pre

payment system

Pay as you save



Retrofitting the house


• Potential Size 20MW Biomass Installation • 5MW Electrical & 15MW Thermal

• 2,000 houses • Kerry General Hospital / Health Board head office • Dairy processing unit • County Buildings / Clash Industrial Estate • Hotels / Sports Complex / Aqua dome • Primary & Secondary Schools, ITT South Campus

• Approximate 15,000 Biomass Tonnes Per Year (50,000 available) • Approximate Biomass Flue Cost €1.2 - €1.4 million per year • Potential Electrical Income €1,200,000.00 • Potential Thermal Income €3,000,000.00 • Approximate 14,000 tonnes CO2 Saving

Future Proposal

and Phasing



Future Extension


Sources:http://www.seai.ie/Renewables/Bioenergy/Information_and_Resources/Proceedings_of_Bioenergy_Conferences/REHEAT_Information _Day/Support_funding_for_renewable_heat_in_Ireland_SEI.pdfhttp://www.seai.ie/News_Events/Press_Releases/2007/Sustainable_Energy_Ireland's_House_of_Tomorrow_Programme_supports_5000_homes.html

• The Green Paper “Towards a Sustainable Energy Future for Ireland” was released in 2006, which identified the essentials of the way forward as regards development of renewables and energy efficiency.

• SEI House of Tomorrow Program, which has substantially improved the insulation standards of low-income homes.

• SEI, Renewable Heat Deployment Program• ReHeat Program

Policies

• I think this system works due to the climate of Ireland and that they do not experience extremely cold winters. So the requirement for heat is not as demanding as say other communities that face colder and more sudden cold fronts.

• The economic background and demographics of the both Tralee and McKees Rocks are similar.

• Since the climatic similarity is factor, the system could be implemented without extensive restructuring.

• Most importantly the scale of the distribution system is suitable as a proposal for the McKees Rocks Community.

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