Tag Archives: community energy

Heating Clydebank via the Clyde: renewable heat in the COP26 host city

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Image: West Dunbartonshire Council

In less than ten months’ time, the eyes of the world will be on Glasgow, as the city plays host to the UN’s 26th Climate Change Conference (COP26). Leaders from across the world will come together to discuss enhanced ambitions to reduce greenhouse gas emissions and take steps to mitigate the effects of climate change. This is a process known as the ‘ratchet mechanism’, which envisions signatories of the Paris Agreement, stepping up their commitments to reduce carbon emissions every five years. This year’s conference in Glasgow is the first time that this mechanism will be in play, and expectations surrounding a significant acceleration of efforts to reduce greenhouse gas emissions are high.

With an eye on climate change and the impact of the Covid-19 pandemic, many countries are already discussing how they can take advantage of the need for economic recovery as an opportunity to accelerate the transition to carbon neutrality. A key element of this transition will be the decarbonisation of the housing stock, and the Climate Change Committee has highlighted the significant role that the implementation of renewable forms of heating will play in reducing the amount of carbon emitted by our homes.

Queens Quay, Clydebank

An example of a project which will take advantage of a variety of modern renewable technologies to create the “greenest town in Scotland” is the Queens Quay development in Clydebank, a site which is only five miles from the Scottish Event Campus where COP26 will take place.

Queens Quay is a £250 million regeneration of the former John Brown shipyard in Clydebank. Designed to take advantage of its waterfront location, the development will feature a variety of mixed-use spaces and a pioneering district heating system. This system will utilise Scotland’s first major and the UK’s largest water-sourced heat pump. The heat pump will extract heat from the River Clyde, and after a process of compression, the heat will be pumped into the development using a buried modular district heating system. It is estimated that this innovative combination of heat pump and district heating technology will cut more than 4,000 tonnes of CO2 emissions each year.

But just how do these technologies work? In this blog, we will take a look at how heat pumps and district heating systems operate, and their application in the Queens Quay development in Clydebank.

Heat pump

In simple terms, a heat pump is a form of renewable heating system that is able to move thermal energy from one location to another. There are a number of different types of heat pump which can extract thermal energy from different locations. At the Queens Quay development, a water-sourced heat pump will be used to extract thermal energy from the River Clyde.

Water-sourced heat pumps use a network of submerged pipes which contain a working fluid that absorbs the heat within the body of water. This working fluid then undergoes a process of conversion that increases the temperature of the heat generated. Once at an appropriate temperature, it can then be used to provide heating and hot water. 

Naturally, as not all developments are located near a body of water, the use of water-sourced heat pump is relatively uncommon. However, water-sourced heat pumps are able to operate more efficiently than ground and air-sourced heat pumps, as heat transfers more efficiently due to the stability of the temperature of water.

District heating

Once heat is produced, it’s vital that it is transferred to buildings in an efficient and reliable manner that prevents heat-loss. A system of district heating is often the most reliable way to utilise energy produced by any form of heat pump, and analysis conducted by the Department for Energy and Climate Change (now the Department for Business, Energy, & Industrial Strategy) found that this combination offers “large CO2 emissions reduction potential”.

A district heating system uses a network of insulated pipes to deliver heat from a centralised energy centre direct to connected buildings. Instead of a boiler, each building will have a heating interface unit which will enable individuals to control the temperature of the heat and hot water they receive without impacting other connected properties.

On top of helping to lower overall fuel costs and reduce greenhouse gas emissions, district heating systems are also easily expandable and new properties can be added to the network as required. This ensures that district-heating systems are future-proofed and are able to respond to the heat requirements of developments as they evolve over time.

Queens Quay implementation

The implementation of a water-sourced air pump and district heating system in the Queens Quay development provides Clydebank with the opportunity to become the “greenest” town in Scotland, and sets an example of how new developments can be created in a way that supports Scotland’s ambition to become net-zero by 2045.

By linking each property in the development to the network, and establishing a council owned energy company as operator, residents of Queens Quay will benefit from reductions in both the cost of energy and their overall carbon footprint. The success of a renewable heating project at this scale could be a significant development in Scotland’s transition to net-zero, as it may prove that renewable heating systems are an effective means to tackle climate change and fuel poverty.

Additionally, as a key benefit of a district heating system is its modularity, there is scope for existing buildings within Clydebank to be connected to the renewable heating network. West Dunbartonshire Council have set out their desire for the nearby NHS Golden Jubilee National Hospital to be added to the network and are also considering if all future developments should be required to join the district heating system.

Final thoughts

The dual threats posed by climate change and Covid-19 have provided the world with a rare opportunity to undergo a truly revolutionary process of recovery. With expectations high that this year’s COP26 will result in countries accelerating the transition to carbon-neutrality, the development of a pioneering renewable heating system just five miles from the conference may offer us a glimpse of the way homes will be heated in the future.

Decarbonising the housing stock is vital in the battle for carbon neutrality, but concerns have previously been raised about the impact this may have on people in fuel poverty. Ensuring that the transition to renewable forms of energy does not exacerbate existing inequalities will be key to ensuring that everyone benefits from the journey to net-zero.  

As a result, the success of the roll-out of the water-sourced heat pump and district heating system in Queens Quay, and the expected reduction in overall energy costs for residents, may prove to be a major stepping stone in Scotland’s journey to becoming carbon neutral.  

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Why the future of public transport has to be green

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Image by flickr user Justin Pickard via Creative Commons

Image by flickr user Justin Pickard via Creative Commons

By Morwen Johnson

Ending our use of oil, coal and natural gas by the end of the century? It seems an impossible task, but this week’s G7 Summit closed with the announcement that the leaders of 7 leading industrial nations had agreed to phase out the use of fossil fuels. As one of the G7, the UK is part of this long-term commitment to reduce greenhouse gas emissions. It is also legally-bound, via The Climate Change Act (2008), to cut carbon emissions by 80% by 2050.

These national and international targets will only be met however if we all make practical changes to our patterns of energy consumption. Organisations like the Energy Saving Trust Foundation and NESTA have pointed out that providing new technologies is not enough to increase public engagement with alternative energy. Success is dependent on getting real people to use these technologies in everyday situations.

Use of renewable energy in public transport

Earlier this week I attended an event on the use of renewable energy in public transport. Not being a transport specialist, but interested from the point of view of community development and social exclusion, it was a useful introduction to some of the innovative work that is underway in Europe.

Organised to present the results of the REPUTE (Renewable Energy in Public Transport Enterprise) project, the event explored the challenges of ensuring accessible public transport in rural areas. People in rural areas typically travel 50% further than people living in urban areas. Travel which is essential to daily life such as going to school or work, going shopping or getting to doctors and hospitals all requires longer journeys, mostly by car or bus. A lack of integration between different modes of transport also makes travel by car more convenient in rural areas.

Pilot projects showcased at the event included personal travel planning in Fort William; solar-powered real-time bus information signs in the Highlands and Islands region; and electric vehicle rental in rural towns in Portugal.

A new guide written by Oxford Brookes University was also launched at the event and includes lots of examples of community-based transport and energy schemes.

Signs of progress

I picked up on a few heartening signs of a shift in attitudes. Many local authorities are publicly supporting alternative energy use in their fleets and providing charging points. A recent survey showed that Scottish councils in particular are leading the way in the UK in the adoption of electric vehicles, with Dundee placed in the number 1 spot and South Lanarkshire, Glasgow and Fife also in the top 5.

  • Aberdeen now has the largest fleet of hydrogen fuel buses of any authority in Europe.
  • 2 of Edinburgh’s bus routes have switched completely to low carbon hybrid vehicles.
  • There are more electric vehicles in Scottish car clubs than the total in car clubs in the rest of the UK.
  • Elsewhere in Europe, Oslo’s initiative to open up bus lanes to electric vehicles has become a victim of its own success with the announcement in May that the law is being changed. A fifth of new cars bought in Norway in the last 3 years have been electric.

A key aspect of pilot schemes is to introduce the public to new energy solutions in a way that is engaging. For example, visitors to the Brecon Beacons National Park can hire electric cars to travel around the area, turning eco travel into a fun activity in itself. A new ‘poo bus’ which runs in Bristol and is fuelled by bio-waste, is a witty way to spark debate about alternative fuel sources. And in Oxford, the city is transforming into a Living Lab for integrated transport experimentation.

Public transport as eco-transport

The need for a transport system which is cleaner and less-energy dependent is clear – the transport sector is the fastest growing source of greenhouse gas emissions.

However investing in innovative renewable energy technologies at a time of budget constraints, requires government and local authorities to show leadership and vision. More importantly, there won’t be a step change in behaviour and attitudes without imaginative approaches to community engagement. Locally-led projects such as those highlighted by REPUTE’s guide are a great way to do this.

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