FLC Pool Heating Project Powerpoint City of Fremantle 24092014 post CEEP comments
1. Low Carbon Pool Heating: Getting the Temperature
Right with Geothermal and Cogeneration
Conference
Fremantle Leisure Centre Pool Heating Project
Craig Heal, Sustainability Technical Officer, September 2014 1
2. Project Objectives
2
• Heat pools independently a
sustainable, cost effective
manner.
• Improve automation of pool
heating and chemical dosing.
• Improve amenity, noise,
operations, safety.
• Reduce greenhouse gas
emissions.
•Addresses Council’s Carbon
Neutrality Policy
3. Project Scope
3
The project consists of five main
components to deliver the optimal
balance between sustainability,
operational effectiveness and cost
competitiveness:
1. 76kWe cogeneration unit, thermally
led.
2. 300kWe groundwater source heat
pump.
3. An shallow geothermal borefield.
4. Supplementary boilers.
5. Supporting infrastructure.
4. Operating Strategy
• 2 years data used, forecast long term.
• Month by month, hour by hour.
• Special needs/shut down.
• Needs modelled against 12 technologies.
• Weighted criteria assessment.
• Best technology applied till capacity expended, then next
technology until all needs met.
4
7. Geothermal bore
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• Shallow borefield constructed- reduces risk and
capital outlay.
• 300kW closed geothermal heat pump draws
water at 27°C from 160m below the ground.
• Water passes through heat plate exchange at
12L/s, warming the pool.
• Large heat energy transfer due to high volumes
of water.
•Water is re-injected at 22°C into the borefield.
•Geothermal supplies primary heating at all
times.
8. Geothermal Heat Pump
8
• Water passes through heat plate exchange at 12L/s, warming
the pool.
• Large heat energy transfer due to high volumes of water.
• Overall COP of 6.0.
9. 9
C Murphy’s Masters thesis report determined that the FLC’s
borefield has a service life of 50 years before reaching thermal
equilibrium.
10. Cogeneration
10
• Will generate 75 kW of
electricity and 120 kW of heat
energy.
• Will reduce use of grid
electricity during peak.
• System slightly undersized to
limit excess electricity created
as export of electricity to the
Perth grid is presently not
allowed.
• 85% overall efficiency.
13. Supporting technologies
• All heating, flow and most
chemical dosing
monitoring and
management now run
through a BMS.
• New piping, ventilation,
plant room, manifolds, site
switchboard, electrical
motor control system.
13
14. • The project was primarily funded by the City
of Fremantle.
• This activity received funding from the
Australian Government.
14
Project Funding
The views expressed herein are not necessarily the views of the Commonwealth of Australia,
and the Commonwealth does not accept responsibility for any information or advice contained
herein
16. Recommendations
• Understand energy needs.
• Technologies and operating strategy must respond to the need.
• Use proper financial calculations to determine real worth.
• Some costs can’t be anticipated, a contingency budget is valid.
• Control project creep.
• Choose a equipment performance contract or Owner’s Engineer service.
• Focus on good tender and contract documents to reap promised
outcomes.
• Formalise performance levels and design expected.
• Multiple technologies means complex integration.
• Obtain integration approvals with electricity network provider ASAP.
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18. SPLASH! Environmental Award Winner
The project won the
SPLASH
Environmental
Project of the year
at the SPRAA
conference in July
14.
One of only two
Environmental
Awards for the Pool
Industry Worldwide.
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19. Conclusion
Project achieved an overall
operational efficiency of 6.5 COP.
An improvement on the specified 4
COP at tender.
19
Editor's Notes
(1 MIN) Councils’ pool leisure centres are typically the biggest source of greenhouse gas, consuming 10% to 30% of Council’s greenhouse profile and are a major expense. When the Fremantle Leisure Centre was slated for major renovations in June 2013, it was the ideal opportunity to optimise the electrical and heating demand for a facility that accounts for 15% of Council’s total greenhouse gas profile.
(2MINS) This article details the project approach, technologies used, key lessons learnt and results, supported by detailed figures in order to provide conference participants with information and recommendations on how best to conduct similar low carbon pool heating projects. Addresses Council’s Carbon Neutrality Policy
FULL NOTES
Be consistent with the City’s Strategic Direction 2010-2015 report and the Low Carbon City Plan, A 40% reduction in greenhouse gas emissions by 2020.
(2MINS)
The pool heating project provided an innovative solution to a need for sustainability and energy conservation by implementing the first of its kind low carbon technology arrangement, primarily led by a 300kW geothermal heat pump, supported by a 76kW cogeneration unit, electrically led and operating on peak periods and supplemented by a wing of instantaneous natural gas boilers. These elements were integrated with new supporting piping and plant room equipment, BMS automation, flow and temperature monitors and housed in a new custom mechanical plant room.
(2 mins) What’s important
(3 MINS) What happens each month and why were things selected?
FULL NOTES
The heat load was examined in greater depth because it drastically affects the FLC’s heating operating strategy, financial viability and greenhouse abatement potential. Figure details how each heating element contributes to the required average monthly thermal load.
Little heat energy is required in summer months; the heat pump supplies base load augmented by the cogeneration unit almost exclusively. The geothermal heat pump supplies primary heat energy throughout the year and is designed for steady constant use. The cogeneration unit supplies a steady supply during peak times throughout the year; some heat rejection in summer occurs, a minor amount in the winter. The boiler supplies top up during cold weather months, and in peak use and maintenance events.
(3 MINS) Drilling down to average daily profiles for different months reveals the FLC’s very different hourly thermal heating requirements and the specialisation of the different heating units, and determines the features of the overall heating operating strategy.
FULL NOTES
January’s high ambient heat means little thermal load is required to heat the FLCs. The facility’s high relative HVAC energy consumption makes it more profitable to run the cogeneration unit for its electrical contribution and reject nearly all the heat load to the atmosphere than heat the pools through other sources.
(2mins) Talk features and construction. Most energy, cost and greenhouse effective technology in this instance.
FULL NOTES
EXPECTED QUESTION
The localised cone of depression over time is negligible, as the system is closed, this positively contributes to the sustainability of the groundwater resource use. This means there is projected to be a viable hot groundwater resource at the required depth to justify a complete replacement to the current heat pump at end of life.
water flow into the long term [2].
(2mins) Talk features and construction. Most energy, cost and greenhouse effective technology in this instance.
FULL NOTES
EXPECTED QUESTION
The localised cone of depression over time is negligible, as the system is closed, this positively contributes to the sustainability of the groundwater resource use. This means there is projected to be a viable hot groundwater resource at the required depth to justify a complete replacement to the current heat pump at end of life.
water flow into the long term [2].
(1 min) Results and long term sustainability, how temperature changes- The modelled pumped water temperatures are 24.2°C (2C decrease) after 50 years
2 MIN What did we get and why did we get it?
FULL NOTES
Cogeneration produces two forms of usage energy, in this case heat and electrical. The system selected is a reciprocating engine fuelled by natural gas. It has an efficiency of 85% and has the benefit of on-site power providing energy security, lower greenhouse gas and greater cost certainty.
1 MIN In parallel to give instant heat across sectors, low maintenance, easy to replace.
(1mins) If you put in bespoke gear make sure its manageable
(1min) The project received $356,048 in Community Energy Efficiency Program funding under the Commonwealth Government’s Clean Energy Future program, Improving Australia’s Energy Efficiency.
(1min) The project received $356,048 in Community Energy Efficiency Program funding under the Commonwealth Government’s Clean Energy Future program, Improving Australia’s Energy Efficiency.
(2 mins) Recommendations for other parties considering undertaking a similar project are listed by order of where they appear in a heating project’s progression:
FULL NOTES in article
SHORT NOTES HERE
Know all energy requirements (past, present and future).
Plan the technologies and operating strategy to fit the energy use. Not the other way around.
At the proposal stage use, financially savvy calculations to determine worth to Council. Nett present value, discount or internal rate of review calculations rather than just simple payback.
Determine all costs and project particulars prior to commencement.
Other costs cant be anticipated as they develop based on tenderer’s response proposal and must be sourced from an allocated contingency budget.
Keep a close eye on project creep.
Consider whether an equipment performance contract or acquiring an Owners Engineer service is right for your organisation.
Take time to develop tender and contract documentation for supply and implementation of capital equipment. Get all PM documentation ready at this stage to ensure promised outcomes are achieved.
Define performance levels expected. This is the time to bed down all design issues- not at construction.
Multiple technologies means multiple integration. Keep on top this risk.
Obtain integration approvals with electricity network provider ASAP.
Pay special attention to all stakeholders. Agree and implement a communication plan document.
Say why for each recommendation only
(1min) Detail other benefits
(1mins) Better results than expected. Well received by community.
