Web site shows effects of mining

By Knight Ridder Tribune


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An environmental group fighting mountaintop-removal coal mining has a new Internet tool that will allow users to punch in zip codes from Winston-Salem's 27101 to Beverly Hills' 90210 to see how and if their electricity has a connection to the controversial mining method.

Matt Wasson, the conservation director for the group, Appalachian Voices, can offer a vivid mental image of the size of a typical mountaintop-removal coal mine. "You take a two- or three-mile swath between Boone and Blowing Rock and level every mountain and dump it in the valley to have the scale of what's going on," he said.

Now, the new Internet tool allows people to see what he has been describing to them.

Users can visit www.appvoices.org, which uses Google maps and shows how the power plants and coal mines are connected. Mountaintop removal is a form of surface or strip mining that uses explosives to take off ridge tops to get to the coal seams. The debris is often scraped into river valleys beside them.

Northwest North Carolina doesn't have enough coal for mountaintop-removal operations here. The nearest mountaintop-removal mine to Boone is 68 miles away, in a straight line, in Wise County, Va. Others are in West Virginia, Kentucky and Tennessee.

The new Web tool shows the direct connections between mountaintop removal and people in Northwest North Carolina. For instance, using the tool and typing in the downtown Winston-Salem zip code 27101, shows that Duke Energy Corp., which provides power in that zip code, uses coal from mountaintop-removal mines to fuel the Belews Creek power plant in Stokes County.

For some areas, the Web site shows satellite images of the mines. In other cases, the maps also include access to high-resolution aerial photographs, allowing users to zoom in close enough to see the trucks in the mines.

Marilyn Lineberger, a spokeswoman for Duke Energy, said that any utility having coal-fired plants would likely be listed on the site.

"We're obligated to purchase the fuel at the most reasonable cost for our customers," she said. The company gets about half of its coal from underground mines and about half from surface mines, which include those that use mountaintop removal.

The Belew Creek power plant would not buy directly from a coal mine, but would get coal from Duke's central fuel purchase from various mines. She said that the company is sensitive to concerns about the mountaintop-mining method and is monitoring it carefully. While the maps and photographs show the sheer scale of the mines, the accompanying stories show how mountaintop removal has affected people who live near the mines.

Appalachian Voices, based in Boone, has made mountaintop removal one of its core issues since it was founded 10 years ago. The nonprofit organization worked for more than six months to develop the technology for the new Web site, and worked in partnership with eight other environmental groups that gathered photographs and interviewed people.

Helping document the human toll were the Appalachian Citizens Law Center, Coal River Mountain Watch, Keeper of the Mountains Foundation, the Ohio Valley Environmental Coalition and other groups. The story of 71-year-old Mary Farley of Wharncliffe, Va., is told on the Winston-Salem link, about how the blasting woke her from her sleep and caused a crack in her kitchen wall.

The Beverly Hills zip code link shows that the area's provider, California Edison Co., buys coal from companies engaged in mountaintop removal. The story there tells of a 2004 tragedy in which a half-ton boulder dislodged by a strip-mine bulldozer rolled down a slope and crashed through a house, killing 3-year-old Jeremy Davidson as he slept in his bed in Wise County, Va.

Wasson said he wants people who use the new Internet tool to see what's going on in people's lives.

"My biggest hope is they're going to make their way into the human side of that and see their connection to the people on the other side of the light switch," he said, adding, "I think anybody who does that will think cheap energy is doing incredibly wrong things to some fellow Americans."

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Denmark's climate-friendly electricity record is incinerated

Denmark Renewable Energy Outlook assesses Eurostat ranking, district heating and trash incineration, EV adoption, wind turbine testing expansions, and electrification to cut CO2, aligning policies with EU 2050 climate goals and green electricity usage.

 

Key Points

A brief analysis of Denmark's green power use, electrification, EVs, and policies needed to meet EU 2050 CO2 goals.

✅ Eurostat rank low due to trash incineration in district heating.

✅ EV adoption stalled after tax reinstatement, slowing electrification.

✅ Wind test centers expanded; electrification could cut 95% CO2.

 

Denmark’s low ranking in the latest figures from Eurostat regarding climate-friendly electricity, which places the country in 32nd place out of 40 countries, is partly a result of the country’s reliance on the incineration of trash to warm our homes via long-established district heating systems.

Additionally, there are not enough electric vehicles – a recent increase in sales was halted in 2016 when the government started to phase back registration taxes scrapped in 2008, and Europe’s EV slump underscores how fragile momentum can be.

 

Not enough green electricity being used

Denmark is good at producing green electricity, reports Politiken, but it does not use enough, and amid electricity price volatility in Europe this is bad news if it wants to fulfil the EU’s 2050 goal to eliminate CO2 emissions.

 

A recent report by Eurelectric and McKinsey demonstrates that if heating, transport and industry were electrified, reflecting a broader European push for electrification across the energy system, 95 percent of the country’s CO2 emissions could be eliminated by that date.

 

Wind turbine testing centre expansion approved

Parliament has approved the expansion of two wind turbine centres in northwest Jutland, supporting integration as e-mobility drives electricity demand in the coming years. The centres in Østerild and Høvsøre will have the capacity to test nine and seven turbines, measuring 330 and 200 metres in size (up from 250 and 165) respectively. The Østerild expansion should be completed in 2019, while Høvsøre ​​will have to wait a little longer.

 

Third on the Environmental Performance Index

Denmark finished third on the latest Environmental Performance Index, finishing only behind Switzerland and France. Its best category ranking was third for Environmental Health, and comparative energy efficiency benchmarking can help contextualize progress. Elsewhere, it ranked 11th for Ecosystem Vitality, 18th for Biodiversity and Habitat, 94th for Forests, 87th for Fisheries, 25th for Climate and Energy and 37th for Air Pollution, 14th for Water Resources and 7th for Agriculture.

 

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Atlantic grids, forestry, coastlines need rethink in era of intense storms: experts

Atlantic Canada Hurricane Resilience focuses on climate change adaptation: grid hardening, burying lines, coastline resiliency to sea-level rise, mixed forests, and aggressive tree trimming to reduce outages from hurricane-force winds and post-tropical storms.

 

Key Points

A strategy to harden grids, protect coasts, and manage forests to limit hurricane damage across Atlantic Canada.

✅ Grid hardening and selective undergrounding to cut outage risk.

✅ Coastal defenses: seawalls, dikes, and shoreline vegetation upgrades.

✅ Mixed forests and proactive tree trimming to reduce windfall damage.

 

In an era when storms with hurricane-force winds are expected to keep battering Atlantic Canada, experts say the region should make major changes to electrical grids, power utilities and shoreline defences and even the types of trees being planted.

Work continues today to reconnect customers after post-tropical storm Dorian knocked out power to 80 per cent of homes and businesses in Nova Scotia. By early afternoon there were 56,000 customers without electricity in the province, compared with 400,000 at the storm's peak on the weekend, a reminder that major outages can linger long after severe weather.

Recent scientific literature says 35 hurricanes -- not including post-tropical storms like Dorian -- have made landfall in the region since 1850, an average of one every five years that underscores the value of interprovincial connections like the Maritime Link for reliability.

Heavy rains and strong winds batter Shelburne, N.S. on Saturday, Sept. 7, 2019 as Hurricane Dorian approaches, making storm safety practices crucial for residents. (Suzette Belliveau/ CTV Atlantic)

Anthony Taylor, a forest ecologist scientist with Natural Resources Canada, wrote in a recent peer-reviewed paper that climate change is expected to increase the frequency of severe hurricanes.

He says promoting more mixed forests with hardwoods would reduce the rate of destruction caused by the storms.

Erni Wiebe, former director of distribution at Manitoba Hydro, says the storms should cause Atlantic utilities to rethink their view that burying lines is too expensive and to contemplate other long-term solutions such as the Maritime Link that enhance grid resilience.

Blair Feltmate, head of the Intact Centre on Climate Change at the University of Waterloo, says Atlantic Canada should also develop standards for coastline resiliency due to predictions of rising sea levels combining with the storms, while considering how delivery rate changes influence funding timelines.

He says that would mean a more rapid refurbishing of sea walls and dike systems, along with more shoreline vegetation.

Feltmate also calls for an aggressive tree-trimming program to limit power outages that he says "will otherwise continue to plague the Maritimes," while addressing risks like copper theft through better security.

 

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EPA Policy to limit telework emerges during pandemic

EPA Telework Policy restricts remote work, balancing work-from-home guidance during the COVID-19 pandemic with flexible schedules, union contracts, OMB guidance, and federal workforce rules, impacting managers, SES staff, and non-bargaining employees nationwide.

 

Key Points

A directive limiting many EPA staff to two telework days weekly, with pandemic exceptions and flexible schedules.

✅ Limits telework to two days per week for many employees

✅ Allows flexible schedules, including maxiflex, during emergencies

✅ Aligns with OMB, OPM, CDC guidance; honors union agreements

 

EPA has moved forward on a new policy that would restrict telework even as agency leadership has encouraged staff to work from home during the coronavirus outbreak.

The new EPA order obtained by E&E News would require employees to report to the office at least three days every week.

"Full-time employees are expected to report to the official worksite and duty station a minimum of three (3) days per week," says the order, dated as approved on Feb. 27. It went into effect March 15 — that night, EPA Administrator Andrew Wheeler authorized telework for the entire agency due to the pandemic.

The order focuses on EPA employees' work schedules and gives them new flexibilities that could come in handy during a public health emergency like the COVID-19 virus, when parts of the power sector consider on-site staffing to ensure continuity.

It also stipulates a deep reduction in EPA employees' capability to work remotely, leaving them with two days of telework per week. An agency order on telework, issued in January 2016, said staff could telework full time.

"The EPA supports the use of telework," said that order. "Regular telework may range from one day per pay period up to full time."

An EPA spokeswoman said the new order doesn't change the agency's guidance to staff to work from home during the pandemic.

"The health and safety of our employees is our top priority, and that is why we have requested that all employees telework, even as residential electricity use increases with more people at home, until at least April 3. There is no provision in the work schedules policy, telework policy or collective bargaining agreement that limits this request," said the spokeswoman.

"While EPA did implement the national work schedule policy effective 3/15/2020, it was implemented in order to provide increased work schedule flexibilities for non-bargaining unit employees who were not previously afforded flexible schedules, including maxiflex," she added.

"The implementation of the policy does not currently impact telework opportunities for EPA employees, and EPA has strongly encouraged all staff to telework," she said.

Still, the new order has caused consternation among EPA employees.

One EPA manager described it as another move by the Trump administration to restrict telework across the government.

"Amidst the COVID-19 crisis, this policy seems particularly ill-timed and unwise. It doesn't even give the administration the chance to evaluate the situation once the COVID-19 pandemic passes," said the manager.

"I think this is a dramatic change in the flexibilities available to the EPA employees without any data to support such a drastic move," the manager said. "It has huge ramifications for employees, many of whom commute over an hour each way to the office, increasing air pollution in the process."

Another EPA staffer said, "I honestly think such an order, given current circumstances, would elicit little more than a scoff and a smirk."

The person added, "How tone-deaf and heavy-handed can one administration be?"

Inside EPA first reported on the new order. E&E News obtained the memo independently.

The recently issued policy applies only to non-bargaining-unit employees, including "full-time and part-time" agency staff as well as "supervisors and managers in the competitive, excepted, Senior Level, Scientific and Professional, and Senior Executive Service positions."

In addition, the order covers "Public Health Service Officers, Schedule C, Administratively Determined employees and non-EPA employees serving on Intergovernmental Personnel Act assignments to EPA."

Nevertheless, EPA employees covered under union contracts must adhere to those contracts if the policy runs counter to them.

"If provisions of this order conflict with the provisions of a collective bargaining agreement, the provisions of the agreement must be applied," the order says.

EPA has taken a more restrictive approach with the agency's largest union, American Federation of Government Employees Council 238, which represents about 7,500 EPA employees. EPA imposed a contract on the council's bargaining unit employees last July that limited them to one day of telework per week, among other changes that triggered union protests.

EPA and AFGE have since relaunched contract negotiations, and how to handle telework is one of the issues under discussion. Both sides committed to complete those bargaining talks by April 15 and work with the Federal Service Impasses Panel if needed (Greenwire, Feb. 27).

 

Both sides of the telework debate
EPA's new order has been under consideration for some time.

E&E News obtained a draft version last year. The agency had circulated it for comment in July, noting the proposal "limits the number of days an employee may telework per week," among other changes (Greenwire, Sept. 12, 2019).

EPA, like other federal agencies under the Trump administration, has sought to reduce employees' telework. That effort, though, has run into the headwinds of a global pandemic, with a U.S. grid warning highlighting broader risks, leading agency leaders to reverse course and now encourage staff to work remotely in order to stop the spread of the COVID-19 virus.

Wheeler in an email last week told staff that he authorized telework for employees across the country. Federal worker unions had sought the opportunity for remote work on behalf of EPA employees, and the agency had already relaxed telework policies at various offices the prior week where the coronavirus had begun to take hold.

The EPA spokeswoman said the agency moved toward telework after guidance from other agencies.

"Consistent with [Office of Management and Budget], [Centers for Disease Control and Prevention] and [Office of Personnel Management] guidance, along with state and local directives, we have taken swift action in regions and at headquarters to implement telework for all employees. We continue to tell all employees to telework," said the spokeswoman.

Wheeler said in a later video message that his expectation was most EPA employees were working from home.

"I understand that this is a difficult and scary time for all of us," said the EPA administrator.

The coronavirus has become a real challenge for EPA, and utilities like BC Hydro Site C updates illustrate broader operational adjustments.

Agency staff have been exposed to the virus while some have tested positive, and nuclear plant workers have raised similar concerns, according to internal emails. That has led to employees self-quarantining while their colleagues worry they may next fall ill (Greenwire, March 20).

One employee said that since EPA's operations have been maintained with staff working from home, even as household electricity bills rise for many, it's harder for the Trump administration to justify restricting remote work.

"With the current climate, I think employees have shown we can keep the agency going with nearly 95% teleworking full time. It makes their argument hard to justify in light of things," said the EPA employee.

The Trump administration overall has pushed for more remote work by the federal workforce in the battle with the COVID-19 virus. The Office of Management and Budget issued guidance to agencies last week "to minimize face-to-face interactions" and "maximize telework across the nation."

Lawmakers have also pushed to expand telework for federal workers due to the virus.

Democratic senators sent a letter last week urging President Trump to issue an executive order directing agencies to use telework.

In addition, Sens. James Lankford (R-Okla.), Chris Van Hollen (D-Md.) and Kyrsten Sinema (D-Ariz.) introduced legislation that would allow federal employees to telework full time during the pandemic.

Some worry EPA's new order could further sour morale at the agency after the pandemic passes, as other utilities consider measures like unpaid days off to trim costs. Employees may leave if they can't work from home more.

"People will quit EPA over something like this. Maybe that's the goal," said the EPA manager.

 

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Energy chief says electricity would continue uninterrupted if coal phased out within 30 years

Australia Energy Policy Debate highlights IPCC warnings, Paris Agreement goals, coal phase-out, emissions reduction, renewables, gas, pumped hydro, storage, reliability, and investment certainty amid NEG uncertainty and federal-state tensions over targets.

 

Key Points

Debate over coal, emissions targets, and grid reliability, guided by IPCC science, Paris goals, and market reforms.

✅ IPCC urges rapid cuts and coal phase-out by 2050

✅ NEG's emissions pillar stalled; reliability obligation alive

✅ States, market operators push investment certainty and storage

 

The United Nation’s climate body, the Intergovernmental Panel on Climate Change, on Monday said radical emissions reduction across the world’s economies, including a phase-out of coal by 2050, was required to avoid the most devastating climate change impacts.

The Morrison government dismissed the findings. Treasurer Josh Frydenberg insisted this week that “coal is an important part of the energy mix”.

“If we were to take coal out of the system the lights would go out on the east coast of Australia overnight. It provides more than 60 per cent of our power," he said.

Ms Zibelman, whose organisation operates the nation’s largest gas and electricity markets, said if Australia was to make an orderly transition to low-emissions electricity generation, aligning with the sustainable electric planet vision, “then certainly we would keep the lights on”.

Ms Zibelman said coal assets should be maintained “as long as they are economically viable and we should have a plan to replace them with resources that are lowest cost”.

Those options comprised gas, renewables, pumped hydro and other energy storage, she told ABC radio, as New Zealand weighs electrification to replace fossil fuels.

Under the Paris treaty the government has pledged to lower emissions by 26 per cent by 2030, based on 2005 levels, even as national emissions rose 2% recently according to industry reports.

Labor would increase the goal to a 45 per cent cut - a policy Prime Minister Scott Morrison said last month would " shut down every coal-fired power station in the country and ... increase people’s power bill by about $1,400 on average for every single household”.

The federal government has scrapped its proposed National Energy Guarantee, which would have cut emissions in the electricity sector, but the reliability component of the plan may continue in some form.

The policy was being developed by the Energy Security Board. The group’s chairwoman Kerry Schott has expressed anger at its demise but on Thursday revealed the board was still working on the policy because “nobody told us to stop”.

Speaking at the Melbourne Institute's Outlook conference, she urged the government to revive the emissions reduction component of the plan to provide investment certainty, noting the IEA net-zero report on Canada shows electricity demand rises in decarbonisation.

Energy Minister Angus Taylor, an energy consultant before entering Parliament, on Thursday said the electricity sector would reduce emissions in line with the Paris deal without a mandated target.

Mr Taylor said only a “very brave state” would not support the policy’s reliability obligation.

The federal government has called a COAG energy council meeting for October 26 in Sydney to discuss electricity reliability.

It is understood Mr Taylor has not contacted Victoria, Queensland or the ACT since taking the portfolio, despite needing unanimous support from the states to progress the issue.

The Victorian government goes into caretaker mode on October 30 ahead of that state's election.

Victorian Energy Minister Lily D’Ambrosio said the federal government was “a rabble when it comes to energy policy, and we won’t be signing anything until after the election".

Speaking at the Melbourne Institute conference, prominent business leaders on Thursday bemoaned a lack of political leadership on energy policy and climate change, saying the only way forward appeared to be for companies to take action themselves, with some pointing to Canada's race to net-zero as a case study in the role of renewables.

Jayne Hrdlicka, chief executive of ASX-listed dairy and infant-formula company a2 Milk, said "we all have an obligation to do the very best job we can in managing our carbon footprint".

"We just need to get on doing what we can .. and then hope that policy will catch up. But we can’t wait," she said.

Ms Hrdlicka said the recent federal political turmoil had been frustrating "because if you invest in building relationships as most of us do in Canberra and then overnight they are all changed, you’re starting from scratch".

 

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DBRS Confirms Ontario Power Generation Inc. at A (low)/R-1 (low), Stable Trends

OPG Credit Rating affirmed by DBRS at A (low) issuer and unsecured debt, R-1 (low) CP, Stable trends, backed by a supportive regulatory regime, strong leverage metrics, and provincial support; monitor Darlington Refurbishment costs.

 

Key Points

It is DBRS's confirmation of OPG at A (low) issuer and unsecured, R-1 (low) CP, with Stable outlooks.

✅ Stable trends; strong cash flow-to-debt and capital ratios

✅ Provincial financing via OEFC; Fair Hydro Trust ring-fenced

✅ Darlington Refurbishment on budget; cost overruns remain risk

 

DBRS Limited (DBRS) confirmed the Issuer Rating and the Unsecured Debt rating of Ontario Power Generation Inc. (OPG or the Company) at A (low) and the Commercial Paper (CP) rating at R-1 (low), amid sector developments such as Hydro One leadership efforts to repair government relations and measures like staff lockdowns at critical sites.

All trends are Stable. The ratings of OPG continue to be supported by (1) the reasonable regulatory regime in place for the Company's regulated generation facilities, including stable pricing signals for large users, (2) strong cash flow-to-debt and debt-to-capital ratios and (3) continuing financial support from its shareholder, the Province of Ontario (the Province; rated AA (low) with a Stable trend by DBRS). The Province, through its agent, the Ontario Electricity Financial Corporation (rated AA (low) with a Stable trend by DBRS), provides most of OPG's financing (approximately 43% of consolidated debt). The Company's remaining debt includes project financing (31%), including projects such as a battery energy storage system proposed near Woodstock, non-recourse debt issued by Fair Hydro Trust (Senior Notes rated AAA (sf), Under Review with Negative Implications by DBRS; 11%), CP (2%) and Senior Notes issued under the Medium Term Note Program (12%).

In March 2019, the Province introduced 'Bill 87, Fixing the Hydro Mess Act, 2019' which includes winding down the Fair Hydro Plan, and later introduced electricity relief to mitigate customer bills during the COVID-19 pandemic. OPG will remain as the Financial Services Manager for the outstanding Fair Hydro Trust debt, which will become obligations of the Province. DBRS does not expect this development to have a material impact on the Company as (1) the Fair Hydro Trust debt will continue to be bankruptcy-remote and ring-fenced from OPG (all debt is non-recourse to the Company) and (2) the credit rating on the Company's investment in the Subordinated Notes (rated AA (sf), Under Review with Negative Implications by DBRS) will likely remain investment grade while the Junior Subordinated Notes (rated A (sf), Under Review with Developing Implications by DBRS) will not necessarily be negatively affected by this change (see the DBRS press release, 'DBRS Maintains Fair Hydro Trust, Series 2018-1 and Series 2018-2 Notes Under Review,' dated March 26, 2019, for more details).

OPG's key credit metrics improved in 2018, following the approval of its 2017-2021 rates application by the Ontario Energy Board in December 2017, alongside the Province's energy-efficiency programs that shape demand. The Company's profitability strengthened significantly, with corporate return on equity (ROE) of 7.8% (adjusted for a $205 million gain on sale of property; 5.1% in 2017) closer to the regulatory allowed ROE of 8.78%. However, DBRS continues to view a positive rating action as unlikely in the short term because of the ongoing large capital expenditures program, including the $12.8 billion Darlington Refurbishment project, amid ongoing oversight following the nuclear alert investigation in Ontario. However, a downgrade could occur should there be significant cost overruns with the Darlington Refurbishment project that result in stranded costs. DBRS notes that the Darlington Refurbishment project is currently on budget and on schedule.

 

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Are Norwegian energy firms ‘best in class’ for environmental management?

CO2 Tax for UK Offshore Energy Efficiency can accelerate adoption of aero-derivative gas turbines, flare gas recovery, and combined cycle power, reducing emissions on platforms like Equinor's Mariner and supporting net zero goals.

 

Key Points

A carbon price pushing operators to adopt efficient turbines, flare recovery, and combined cycle to cut emissions.

✅ Aero-derivative turbines beat industrial units on efficiency

✅ Flare gas recovery cuts routine flaring and fuel waste

✅ Combined cycle raises efficiency and lowers emissions

 

By Tom Baxter

The recent Energy Voice article from the Equinor chairman concerning the Mariner project heralding a ‘significant point of reference’ for growth highlighted the energy efficiency achievements associated with the platform.

I view energy efficiency as a key enabler to net zero, and alongside this the UK must start large-scale storage to meet system needs; it is a topic I have been involved with for many years.

As part of my energy efficiency work, I investigated Norwegian practices and compared them with the UK.

There were many differences, here are three;


1. Power for offshore installations is usually supplied from gas turbines burning fuel from the oil and gas processing plant, and even as the UK's offshore wind supply accelerates, installations convert that to electricity or couple the gas turbine to a machine such as a gas compressor.

There are two main generic types of gas turbine – aero-derivative and industrial. As the name implies aero-derivatives are aviation engines used in a static environment. Aero-derivative turbines are designed to be energy efficient as that is very import for the aviation industry.

Not so with industrial type gas turbines; they are typically 5-10% less efficient than a comparable aero-derivative.

Industrial machines do have some advantages – they can be cheaper, require less frequent maintenance, they have a wide fuel composition tolerance and they can be procured within a shorter time frame.

My comparison showed that aero-derivative machines prevailed in Norway because of the energy efficiency advantages – not the case in the UK where there are many more offshore industrial gas turbines.

Tom Baxter is visiting professor of chemical engineering at Strathclyde University and a retired technical director at Genesis Oil and Gas Consultants


2. Offshore gas flaring is probably the most obvious source of inefficient use of energy with consequent greenhouse gas emissions.

On UK installations gas is always flared due to the design of the oil and gas processing plant.

Though not a large quantity of gas, a continuous flow of gas is routinely sent to flare from some of the process plant.

In addition the flare requires pilot flames to be maintained burning at all times and, while Europe explores electricity storage in gas pipes, a purge of hydrocarbon gas is introduced into the pipes to prevent unsafe air ingress that could lead to an explosive mixture.

On many Norwegian installations the flare system is designed differently. Flare gas recovery systems are deployed which results in no flaring during continuous operations.

Flare gas recovery systems improve energy efficiency but they are costly and add additional operational complexity.


3. Returning to gas turbines, all UK offshore gas turbines are open cycle – gas is burned to produce energy and the very hot exhaust gases are vented to the atmosphere. Around 60 -70% of the energy is lost in the exhaust gases.

Some UK fields use this hot gas as a heat source for some of the oil and gas treatment operations hence improving energy efficiency.

There is another option for gas turbines that will significantly improve energy efficiency – combined cycle, and in parallel plans for nuclear power under the green industrial revolution aim to decarbonise supply.

Here the exhaust gases from an open cycle machine are taken to a separate turbine. This additional turbine utilises exhaust heat to produce steam with the steam used to drive a second turbine to generate supplementary electricity. It is the system used in most UK power stations, even as UK low-carbon generation stalled in 2019 across the grid.

Open cycle gas turbines are around 30 – 40% efficient whereas combined cycle turbines are typically 50 – 60%. Clearly deploying a combined cycle will result in a huge greenhouse gas saving.

I have worked on the development of many UK oil and gas fields and combined cycle has rarely been considered.

The reason being is that, despite the clear energy saving, they are too costly and complex to justify deploying offshore.

However that is not the case in Norway where combined cycle is used on Oseberg, Snorre and Eldfisk.

What makes the improved Norwegian energy efficiency practices different from the UK – the answer is clear; the Norwegian CO2 tax.

A tax that makes CO2 a significant part of offshore operating costs.

The consequence being that deploying energy efficient technology is much easier to justify in Norway when compared to the UK.

Do we need a CO2 tax in the UK to meet net zero – I am convinced we do. I am in good company. BP, Shell, ExxonMobil and Total are supporting a carbon tax.

Not without justification there has been much criticism of Labour’s recent oil tax plans, alongside proposals for state-owned electricity generation that aim to reshape the power market.

To my mind Labour’s laudable aims to tackle the Climate Emergency would be much better served by supporting a CO2 tax that complements the UK's coal-free energy record by strengthening renewable investment.

 

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