Category: Scotland

New Book: ‘Water, Energy, and Environment – A Primer’

After a long hiatus from blogging while I worked on a new book, I am pleased to announce that the book ‘Water, Energy, and Environment – A Primer’ will be published by International Water Association Publishing (IWAP) on February 18th (2019). It will be available in both printed and digital form, and the digital version will be downloadable for free as an Open Access (OA) document.

To access the free digital version go to IWAP’s OA website on Twitter: https://twitter.com/IWAP_OA.

Attached below is front material from the book, its preface and table of contents. Designed to serve as a basic and easily read introduction to the linked topics of water, energy, and environment, it is just under 200 pages in length, a convenient size to throw into a folder, a briefcase, or a backpack. Its availability as an OA document means that people all over the world with access to the internet will have access to the book and its 10 chapters.

With the completion of the book I plan to return to a regular schedule of blogging.
…………………………..
Contents
Preface ………………………………….. xi
Acknowledgement ……………………….. xv
Acronyms ……………………………… xvii
Epigraph ……………………………….. xxi
Chapter 1
Water and its global context …………………. 1
1.1 Earth’s Water Resources . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Saline Water and Desalination Processes . . . . . . . . . . . 2
1.3 Energy Requirements and Costs of Desalination . . . . . 5
1.4 Demand for Freshwater . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Implications of Limited Access to Freshwater . . . . . . . . . 9
1.6 Actions to Increase Access to Freshwater . . . . . . . . . . 10
1.7 Gender Equity Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 2
Energy and its global context ……………….. 13
2.1 Energy’s Role in Society . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 Energy Realities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3 What is Energy? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.4 Energy Trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.4.1 Important questions . . . . . . . . . . . . . . . . . . . . . . . 18
2.4.2 How is energy used? . . . . . . . . . . . . . . . . . . . . . . 18
2.4.3 Electrification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Chapter 3
Exploring the linkage between water
and energy ……………………………….. 23
3.1 Indirect Linkages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.2 The Policy Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3 The Conundrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.4 Addressing the Conundrum . . . . . . . . . . . . . . . . . . . . . . . 26
3.5 The Need for Partnership . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 4
Energy production and its consequences for
water and the environment …………………. 29
4.1 Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2 More on Climate Change . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3 Environment and Religion . . . . . . . . . . . . . . . . . . . . . . . . 33
4.3.1 The theocentric worldview . . . . . . . . . . . . . . . . . 33
4.3.2 The anthropocentric worldview . . . . . . . . . . . . . 34
4.3.3 Other worldviews . . . . . . . . . . . . . . . . . . . . . . . . . 34
Chapter 5
Energy options ……………………………. 37
5.1 Fossil Fuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2 Nuclear Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.3 Geothermal Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.4 The Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.5 Energy Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.5.1 Energy demand . . . . . . . . . . . . . . . . . . . . . . . . . . 40
vi Water, Energy, and Environment – A Primer
5.5.2 Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.5.3 Saving energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.5.4 Accelerating implementation . . . . . . . . . . . . . . . 43
5.5.5 Energy Star . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.5.6 The lighting revolution . . . . . . . . . . . . . . . . . . . . . 45
5.5.7 Energy efficiency in buildings . . . . . . . . . . . . . . . 48
5.5.7.1 Zero energy buildings . . . . . . . . . . . . . 48
5.5.7.2 Electrochromic windows . . . . . . . . . . . 52
5.6 Energy Efficiency in Industry . . . . . . . . . . . . . . . . . . . . . . 54
5.7 Energy Efficiency in Transportation . . . . . . . . . . . . . . . . 56
Chapter 6
Fossil fuels ………………………………. 61
6.1 Coal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
6.1.1 Carbon capture and sequestration . . . . . . . . . . 63
6.1.2 A conundrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
6.2 Petroleum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.2.1 Oil spills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.2.2 Peak oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.3 Natural Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6.3.1 Methane hydrates . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.3.2 Fracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Chapter 7
Nuclear power ……………………………. 85
7.1 Nuclear Fission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
7.1.1 Fission fundamentals . . . . . . . . . . . . . . . . . . . . . . 85
7.1.2 Introduction to nuclear issues . . . . . . . . . . . . . . . 87
7.1.3 Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
7.2 Nuclear Fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.2.1 Fusion fundamentals . . . . . . . . . . . . . . . . . . . . . . 91
7.2.2 Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
7.2.3 Barriers to Fusion . . . . . . . . . . . . . . . . . . . . . . . . . 94
7.2.4 Pros and cons . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
7.2.5 Thoughts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Chapter 8
Renewable energy ………………………… 97
8.1 The Sun’s Energy Source and Radiation
Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
8.2 Direct Solar Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
8.2.1 Photovoltaics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
8.2.2 Concentrating solar power (CSP) . . . . . . . . . . 108
8.2.2.1 Power tower . . . . . . . . . . . . . . . . . . . . 109
8.2.2.2 Linear concentrator . . . . . . . . . . . . . . 110
8.2.2.3 Dish engine . . . . . . . . . . . . . . . . . . . . . 111
8.2.2.4 CSTP history . . . . . . . . . . . . . . . . . . . 112
8.2.2.5 Advantages and disadvantages . . . 112
8.2.2.6 Thermal storage . . . . . . . . . . . . . . . . . 113
8.2.2.7 Current status . . . . . . . . . . . . . . . . . . . 114
8.2.2.8 Concentrating photovoltaics (CPV) . 115
8.3 Solar Power Satellite (SPS) System . . . . . . . . . . . . . . 116
8.4 Hydropower and Wind Energy . . . . . . . . . . . . . . . . . . . 119
8.4.1 Hydropower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
8.4.2 Wind energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
8.4.2.1 Onshore wind . . . . . . . . . . . . . . . . . . . 121
8.4.2.2 History . . . . . . . . . . . . . . . . . . . . . . . . . 124
8.4.2.3 An onshore limitation . . . . . . . . . . . . . 124
8.4.2.4 Offshore wind . . . . . . . . . . . . . . . . . . . 125
8.5 Biomass Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
8.5.1 Sources of biomass . . . . . . . . . . . . . . . . . . . . . . 129
8.5.2 Wood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
8.5.3 Biofuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
8.5.4 Algae . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
8.5.5 Biochar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
8.5.6 The future . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
8.6 Geothermal Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
8.6.1 Sources of geothermal energy . . . . . . . . . . . . . 134
8.6.2 Manifestations of geothermal energy . . . . . . . 135
8.6.3 Uses of geothermal energy . . . . . . . . . . . . . . . . 135
8.6.3.1 Geothermal power generation . . . . . 136
8.6.3.2 Ground-source heat pumps . . . . . . . 138
8.6.4 An unusual source of geothermal energy . . . . 140
Ocean Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
8.7.1 Wave energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
8.7.1.1 Wave energy conversion
devices . . . . . . . . . . . . . . . . . . . . . . . . 142
8.7.1.2 Potential and pros and cons . . . . . . . 143
8.7.2 Ocean current energy . . . . . . . . . . . . . . . . . . . . 144
8.7.3 Tidal energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
8.7.3.1 Barrage . . . . . . . . . . . . . . . . . . . . . . . . 146
8.7.3.2 History . . . . . . . . . . . . . . . . . . . . . . . . . 147
8.7.3.3 Environmental impacts . . . . . . . . . . . 147
8.7.4 Ocean thermal energy conversion (OTEC) . . 147
8.7.4.1 Barriers . . . . . . . . . . . . . . . . . . . . . . . . 148
8.7.4.2 OTEC technologies . . . . . . . . . . . . . . 148
8.7.4.3 Other cold water applications . . . . . . 149
8.7.4.4 OTEC R&D . . . . . . . . . . . . . . . . . . . . . 149
Chapter 9
Energy storage …………………………… 151
9.1 Storage and Grids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
9.2 Types of Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
9.2.1 Traditional and advanced batteries . . . . . . . . . 153
9.2.1.1 Lead–acid . . . . . . . . . . . . . . . . . . . . . . 153
9.2.1.2 Sodium sulfur . . . . . . . . . . . . . . . . . . . 153
9.2.1.3 Nickel–cadmium . . . . . . . . . . . . . . . . . 154
9.2.1.4 Lithium-ion . . . . . . . . . . . . . . . . . . . . . 154
9.2.1.5 Supercapacitors . . . . . . . . . . . . . . . . . 155
9.2.2 Flow batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
9.2.3 Flywheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
9.2.4 Superconducting magnetic energy
storage (SMES) . . . . . . . . . . . . . . . . . . . . . . . . . 158
9.2.5 Compressed air energy storage (CAES) . . . . 159
9.2.6 Pumped storage . . . . . . . . . . . . . . . . . . . . . . . . . 160
9.2.7 Thermal storage . . . . . . . . . . . . . . . . . . . . . . . . . 161
9.3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
9.4 Costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
9.5 Fundamental Change . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Chapter 10
Policy considerations …………………….. 165
10.1 Important Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
10.1.1 Is there a physical basis for understanding
global warming and climate change? . . . . . . 166
10.1.2 Is there documented evidence for global
warming and climate change? . . . . . . . . . . . . 168
10.1.3 Can global warming and climate change be
attributed to human activities, and what are
those activities? . . . . . . . . . . . . . . . . . . . . . . . . 170
10.1.4 What are the potential short- and long-term
impacts of global warming and climate
change with respect to water supply,
environment, and health? What is the
anticipated time scale for these
impacts? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
10.1.5 What can be done to mitigate the onset
and potential impacts of global warming
and climate change? . . . . . . . . . . . . . . . . . . . . 179
References ……………………………… 183
Index …………………………………… 189

……………………

Preface
This book springs from my strong conviction that clean water and clean energy are the critical elements of long-term global sustainable development. I also believe that we are experiencing the beginning of an energy revolution in these early years of the 21st century. Providing clean water requires energy, and providing clean energy is essential to reducing the environmental impacts of energy production and use. Thus, I see a nexus – a connection, a causal link – among water, energy, and environment. In recent years we have adopted the terminology of the water-energy nexus for the intimate relationship between water and energy, and similarly we can apply the term nexus to the close connections among water, energy, and environment. Thisuse of the term nexus can be, and has been, extended to include the related issues of food production and health. Dealing with, and writing about, a two-element nexus is difficult enough. In this book, I will limit my analysis and discussion to the three-element water -energy-environment nexus and leave the discussion of other possible nexus elements to those more qualified to comment.

This book also springs from my observation that while there are many existing books of a more-or-less technical nature on the three elements of this nexus, a book addressing each of them and their interdependencies in a college-level primer for a broad global and multidisciplinary audience would be valuable. Consideration of these and related issues, and options for addressing them, will be priorities for all levels of government. They will also be priorities for many levels of the
private sector in the decades ahead, both in developing and developed nations. A handbook-style primer that provides an easily read and informative introduction to, and overview of, these issues will contribute broadly to public education. It will assist governments and firms in carrying out their responsibilities to provide needed services and goods in a sustainable manner, and help to encourage young people to enter these fields. It will serve as an excellent mechanism for exposure of experts in other fields to the issues associated with the water-energy-environment nexus. Further, in addition to the audiences mentioned above, target audiences include economists and others in the finance communities who will analyze and provide the needed investment funds, and those in the development community responsible for planning and delivering services to underserved populations.
The book is organized as follows: the first chapter will be devoted to the concept of nexus and how the three elements, water, energy, and environment, are inextricably linked. This recognition leads to the conclusion that if society is to optimize their contributions to human and planetary welfare they must be addressed jointly. No longer must policy for each of these elements be considered in its own silo. Chapters 2 and 3 will be devoted to spelling out global contexts for water and energy issues, respectively. Chapter 4, on related environmental issues, will address the issues of water contamination, oil spills, fracking, radioactive waste storage, and global warming/
climate change. Chapter 5 will be a discussion of energy efficiency – i.e., the wise use of energy – and its role in limiting energy demand and its associated benefits. Chapter 6 will focus on the basics of fossil fuels – coal, oil, natural gas – which today dominate global energy demand. Chapter 7 will discuss nuclear-fission-powered electricity production, which today accounts for 10% of global electricity. It will also discuss the prospects for controlled nuclear fusion. Chapter 8 will discuss the broad range of renewable energy technologies – wind, solar,hydropower, biomass, geothermal, ocean energy – which are the basis of the now rapidly emerging energy revolution. Chapter 9 will discuss the closely related issue of energy storage. Finally, Chapter 10 will address
policy issues associated with water, energy, and environment, discuss policy history and options, and provide recommendations.

Financing the Growth of Renewable Energy in Scotland

This is a follow-up to my previous blog post ‘The Exciting Changes Taking Place in Scotland’s Energy System’ that discusses how Scotland’s already impressive and steadily increasing deployment of renewable energy systems is being financed.  While technology costs  will always be an important part of the total cost of deploying renewable energy systems, as these costs come down with technological advances, large scale manufacturing, and increased deployment experience, financing costs imposed by lending institutions, whether private or public, take on increasing  importance.  Financing of emerging technology options has always been recognized as a critical barrier, and demonstrating the ‘bankability’ of proposed projects requires careful attention in the planning phases. Finance issues are a major focus of the annual meeting of Scottish Renewables, the representative body of the Scottish renewable energy industry since 1996. It has over 300 members and member organisations, ranging across all technologies and supply chains.

As reported in the previous blog post, Scotland now generates enough wind energy to meet its entire residential electricity demand, and renewables are Scotland’s largest source of electrical power, with much more to come. How this came about is a case study in the importance of national policy in support of renewable generation, a policy still needing implementation in the United States.

Scotland, a separate country with its own parliament even though formally a part of the United Kingdom, has set two important energy goals: to achieve 100% renewable electricity generation by 2020 and achieve zero carbon emissions from all power generation by 2030. In support of these goals the Scottish Government has set up several financing programs that offer assistance to renewable energy projects in both the planning and deployment phases. These include the Scottish Government Community and Renewable Energy Scheme (CARES), Scottish Investment Bank’s Renewable Energy Investment Fund (REIF), and Home Energy Scotland. Community Energy Scotland is a registered charity that provides practical help for communities on green energy development and energy conservation. It is supported separately by local communities. Each program is described briefly below.

CARES is a loan fund established in 2011 “..to provide loans toward the high risk, pre-planning consent stage of renewable energy projects which have significant community engagement and benefit.” It is managed by localenergyscotland.org on behalf of the Scottish Government. A part of CARES, the Local Energy Challenge Fund, was established more recently “..to demonstrate the value and benefit of local low-carbon energy economies.”

CARES financing is designed to to support high-risk early planning stages widely recognized as principal barriers for resource-limited small businesses and community groups. Its key features include:
– financing of initial planning of any renewable energy project up to 5MW in size in a competitive process
– unsecured loans of up to £150,000 (£1 = $1.55) for up to 90% of project costs
– a fixed interest rate of 10%

Phase 1 of the Local Energy Challenge Fund attracted 114 applications and 17 were funded. Phase 2 is currently underway. Phase 1 projects include a community district heating scheme, community use of hydrogen, ground source heat pump projects, and development of community microgrids.

The Renewable Energy Investment Fund, established in 2012, supports projects at the demonstration and commercialization stage that
“- Deliver energy from a renewable source, reduce the cost of renewable energy or provide key solutions for renewable energy generation
– Provide benefit to the economy of Scotland
– Have a demonstrable funding gap for REIF to consider
– Be at a sufficient stage of development to require REIF funding before March 2016”

Some of the project types that REIF can support include marine energy, community owned renewables, and renewable district heating. The REIF team also provides technical advice and assistance in finding other funding sources. Its £103 million fund is available to provide commercially priced loans, equity investments, and loan guarantees. Initial projects include
– a £735,000 loan to the Islay Energy Community Benefit Society to install a community owned, 330KW wind turbine on the island,
– a £615,000 loan to a village in Stirlingshire in support of their efforts to become a zero-carbon, zero-waste community,
– a £700,000 loan to support the first phase of the 0.5MW Shetland Tidal Array, and
– a £250,000 loan to support development of the AWS-III wave energy device.

Home Energy Scotland provides up to 75% of the total cost of installing a renewable energy system up to £10,000, and up to 100% of the total cost of connecting to a district heating scheme up to £5,000. Loans are available to owner occupiers in Scotland for existing and new residential buildings. Loan amounts and repayment schedules vary by technology – e.g., the maximum loan amount for installation of a PV system is £2,500 and a maximum loan repayment period of 5 years, while the maximums for installation of a ground source to water heat pump are £10,000 and 12 years. In all cases a Green Deal Assessment of the proposed project is required and installers must be certified.

Community Energy Scotland supports community-owned projects by providing funding for feasibility studies, planning, community consultation, and help in finding funding sources. Supported projects include energy audits, energy efficiency improvements, micro-renewables installations, and installation of wind turbines.

All of the above paints a clear and exciting picture of a country committed to a clean energy future that is willing to back up its words with substantial and ongoing budgets. Scotland may thus prove to be an example to the rest of the world as we leave the fossil fuel era and move into the new era of renewable energy.

The Exciting Changes Taking Place in Scotland’s Energy System

I returned recently from a two-week visit to Scotland, my wife’s home country. She and I are now the owners of a flat (apartment in Americanese) in East Kilbride, near Glasgow, that makes visiting with her family much easier.  Another exciting feature is that on all clear days (it happens occasionally in Scotland) we can see, from the flat’s bedroom windows, wind turbines spinning in the nearby Whitelee wind farm, currently the largest operating onshore wind farm in Europe (just under 600MWp). The wind farm is several miles away from the flat.

image

The purpose of this blog post is to discuss the exciting developments taking place in Scotland’s energy system, where the stated national goal is to go 100% renewables for electricity supply by 2020. Achieving this goal, whether in 2020 or sometime in the decade afterwards, will rely heavily on Scotland’s large wind resources, both onshore and offshore. As a sparsely populated country (total population is 5.4 million ) with significant renewable energy resources, Scotland “..is in a unique position to demonstrate how the transition to a low-carbon, widely distributed energy economy may be undertaken.”

What is Scotland’s current energy situation?  In Late November 2014 it was announced by the independent trade body Scottish Renewables that “.. with numbers from the first half of 2014, ..renewable energy was Scotland’s largest source of (electrical) power.” Specifically, for the first half of 2014, renewables provided 10.3 TWh of electrical energy, while nuclear power, previously Scotland’s main sources of electricity, provided 7.8 TWh. Coal was third with 5.6 TWh with natural gas at 1.4 TWh.

This increase in renewable generation continues the trend shown in the following chart:

image

Installed renewable capacity increased to 7,112 MW by the end of the 3d quarter of 2014 – mostly onshore wind and hydro – with another 441 MW of wind capacity (onshore) in construction, 7,720 MW (onshore and offshore) awaiting construction, and 3,765 MW (onshore) in planning. Small amounts of other renewable generation (biomass, landfill gas, hydro) are also in the pipeline.

image

With wind power already generating enough electricity to supply more than total Scottish household demand, Niall Stuart, Chief Executive of Scottish Renewables, sees much more potential in the future: “Offshore wind and marine energy (wave, tidal, ocean current) are still in the early stages of development but could make a big contribution to our future energy needs if they get the right support from government. That support includes the delivery of grid connections to the islands, home to the UK’s very best wind, wave and tidal sites.”

Scottish enthusiasm for renewables was bolstered by a report issued  by WWF Scotland in January (‘Pathways to Power: Scotland’s route to clean, renewable, secure electricity by 2030’) which concluded that, with respect to electricity, a fossil fuel-free Scotland is not only technically feasible but “..could prove a less costly and safer option than pursuing fossil fuel- based development..” that assumes carbon capture and sequestration (CCS) technology will be operating at scale in 2030. With regard to the Scottish government’s stated goal of decarbonizing the electrical sector by 2030, Paul Gardner of DNV GL, lead author of the report, has stated that “There is no technical reason requiring conventional fossil and nuclear generation in Scotland.”  In addition, Gina Hanrahan, climate and energy officer at WWF Scotland, explained that “The report shows that not only is a renewable, fossil fuel-free electricity system perfectly feasible in Scotland by 2030, it’s actually the safe bet. Pursuing this pathway would allow Scotland to maintain and build on its position as the UK and Europe’s renewable powerhouse, cut climate emissions (electricity generation accounts for one-third of Scotland’s emissions) and continue to reap the jobs and investment opportunities offered by Scotland’s abundant renewable resources.”

What is Scotland’s natural resource base for renewables?  In addition to its existing installed capacity of hydropower (1.3 GW), it is estimated that wind, wave and tide make up more than 80% of Scotland’s  renewable energy potential – 36.5GW/wind (onshore and offshore), 7.5 GW/tidal power, 14 GW/wave power. This total, almost 60 GW, is considerable greater than Scotland’s existing electrical generating capacity from all fuel sources of 10.3 GW.

It is interesting to note that Scotland also has significant fossil fuel resources, including 62.4% of the European Union’s proven oil reserves, 12.5% of the EU’s proven natural gas reserves, and 69% of UK coal reserves.  Nonetheless, the Scottish Government, as discussed above, has set ambitious goals for renewable energy production. This is likely driven by concern for global climate change and the economic potential for Scotland as a major source of renewable energy.

 

 

Wind Energy In Scotland – What A Wind Farm Looks Like

I have just returned from eleven days in Scotland – one week as a Visiting Professor in the Engineering School at the University of Aberdeen and the remaining time visiting with my wife’s family in and around Glasgow.

Prior to heading to Aberdeen, shortly after arriving, I was kindly taken to see the Whitelee Wind Farm just outside Glasgow, an experience I am still savoring. A few pictures will illustrate why I was so excited by the visit – quite a change from the late 60’s and early 70’s when I first got involved with renewables:

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The Whitelee is Europe’s largest onshore wind farm, built in two stages to reach its current dimensions: 215 turbines (140/2.3 MW, 69/3 MW, 6/1.67 MW) with a maximum capacity of 539 MW. Wind energy is Scotland’s fastest growing renewable energy technology, reflecting the fact that Scotland is the windiest country in Europe (25% of all of Europe’s wind crosses the Scottish landmass and its surrounding seas). Scotland’s wind energy potential is estimated to be more than 150 GW onshore (current peak demand in Scotland is 10.5 GW) with significant opportunities for additional onshore and offshore development. Scotland’s offshore potential is estimated to be 206 GW and offshore wind power generation is predicted to be about 10 GW in 2020. As result, the Scottish government has set a target of generating 100% of Scotland’s electricity from renewable energy by 2020, with most of this likely to come from wind power. Scotland is also a world leader in development of wave and tidal power.

A few interesting facts about Scotland’s wind power resource:
– Scotland’s first offshore wind turbine was placed at the Beatrice Wind Farm in the North Sea in 2006 and was the world’s large wind turbine at the time – 5 MW. A second identical turbine was also installed and the wind farm began delivering electricity in 2007. Based on historical wind speed measurements it is expected that these turbines will run 96% of the time (more than 8400 hours per year) and at full power (10 MW) 38% of the time.
– based on averages a wind turbine in an EU country will operate at a 25% capacity factor. In Scotland, given the consistency of wind, it is expected that an average Scottish turbine will have a capacity factor of 35% or more. In fact, a small community wind farm in Shetland set a world record in 2005, achieving a capacity factor of 57.9%.
– About half of the UK’s current installed wind capacity is in Scotland.

This is all happening in the context of a vote next September in Scotland as to whether Scotland will separate from the UK and go out on its own as an independent nation. This is a complicated issue that is receiving extensive coverage in Scotland and the other parts of Great Britain, as well as elsewhere, and may be a nail biter until the vote is taken. An interesting fact is that Scotland is already an independent nation legally – the treaty that bound Scotland to England et al combined their parliaments but did not remove Scotland’s legal separateness. It will be an interesting debate for the next nine months.