Microgeneration, Storage and the Smart Grid
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Trends in Electricity Prices During the Transition Away from Coal by William B
May 2021 | Vol. 10 / No. 10 PRICES AND SPENDING Trends in electricity prices during the transition away from coal By William B. McClain The electric power sector of the United States has undergone several major shifts since the deregulation of wholesale electricity markets began in the 1990s. One interesting shift is the transition away from coal-powered plants toward a greater mix of natural gas and renewable sources. This transition has been spurred by three major factors: rising costs of prepared coal for use in power generation, a significant expansion of economical domestic natural gas production coupled with a corresponding decline in prices, and rapid advances in technology for renewable power generation.1 The transition from coal, which included the early retirement of coal plants, has affected major price-determining factors within the electric power sector such as operation and maintenance costs, 1 U.S. BUREAU OF LABOR STATISTICS capital investment, and fuel costs. Through these effects, the decline of coal as the primary fuel source in American electricity production has affected both wholesale and retail electricity prices. Identifying specific price effects from the transition away from coal is challenging; however the producer price indexes (PPIs) for electric power can be used to compare general trends in price development across generator types and regions, and can be used to learn valuable insights into the early effects of fuel switching in the electric power sector from coal to natural gas and renewable sources. The PPI program measures the average change in prices for industries based on the North American Industry Classification System (NAICS). -
An Overview of the State of Microgeneration Technologies in the UK
An overview of the state of microgeneration technologies in the UK Nick Kelly Energy Systems Research Unit Mechanical Engineering University of Strathclyde Glasgow Drivers for Deployment • the UK is a signatory to the Kyoto protocol committing the country to 12.5% cuts in GHG emissions • EU 20-20-20 – reduction in EU greenhouse gas emissions of at least 20% below 1990 levels; 20% of all energy consumption to come from renewable resources; 20% reduction in primary energy use compared with projected levels, to be achieved by improving energy efficiency. • UK Climate Change Act 2008 – self-imposed target “to ensure that the net UK carbon account for the year 2050 is at least 80% lower than the 1990 baseline.” – 5-year ‘carbon budgets’ and caps, carbon trading scheme, renewable transport fuel obligation • Energy Act 2008 – enabling legislation for CCS investment, smart metering, offshore transmission, renewables obligation extended to 2037, renewable heat incentive, feed-in-tariff • Energy Act 2010 – further CCS legislation • plus more legislation in the pipeline .. Where we are in 2010 • in the UK there is very significant growth in large-scale renewable generation – 8GW of capacity in 2009 (up 18% from 2008) – Scotland 31% of electricity from renewable sources 2010 • Microgeneration lags far behind – 120,000 solar thermal installations [600 GWh production] – 25,000 PV installations [26.5 Mwe capacity] – 28 MWe capacity of CHP (<100kWe) – 14,000 SWECS installations 28.7 MWe capacity of small wind systems – 8000 GSHP systems Enabling Microgeneration -
Two-Stage Radial Turbine for a Small Waste Heat Recovery
energies Article Two-Stage Radial Turbine for a Small Waste Heat y Recovery Organic Rankine Cycle (ORC) Plant Ambra Giovannelli *, Erika Maria Archilei and Coriolano Salvini Department of Engineering, University of Roma Tre, Via della Vasca Navale, 79, 00146 Rome, Italy; [email protected] (E.M.A.); [email protected] (C.S.) * Correspondence: [email protected]; Tel.: +39-06-57333424 This work is an extended version of the paper presented at the 5th International Conference on Energy and y Environment Research ICEER 22–25 July 2019 held in Aveiro, Portugal and published in Energy Reports. Received: 21 January 2020; Accepted: 24 February 2020; Published: 27 February 2020 Abstract: Looking at the waste heat potential made available by industry, it can be noted that there are many sectors where small scale (< 100 kWe) organic Rankine cycle (ORC) plants could be applied to improve the energy efficiency. Such plants are quite challenging from the techno-economic point of view: the temperature of the primary heat source poses a low cutoff to the system thermodynamic efficiency. Therefore, high-performance components are needed, but, at the same time, they have to be at low cost as possible to assure a reasonable payback time. In this paper, the design of a two-stage radial in-flow turbine for small ORC industrial plants is presented. Compared to commonly applied mono-stage expanders (both volumetric and dynamic), this novel turbine enables plants to exploit higher pressure ratios than conventional plants. Thus, the theoretical limit to the cycle efficiency is enhanced with undoubted benefits on the overall ORC plant performance. -
Best Electricity Market Design Practices
In My View Best Electricity Market Design Practices William W. Hogan (forthcoming in IEEE Power & Energy) Organized wholesale electricity markets in the United States follow the principles of bid-based, security-constrained, economic dispatch with locational marginal prices. The basic elements build on analyses done when large thermal generators dominated the structure of the electricity market in most countries. Notable exceptions were countries like Brazil that utilized large-scale pondage hydro systems. For such systems, the critical problem centered on managing a multi- year inventory of stored water. But for most developed electricity systems, the dominance of thermal generation implied that the major interactions in unit commitment decisions would be measured in hours to days, and the interactions in operating decisions would occur over minutes to hours. As a result, single period economic dispatch became the dominant model for analyzing the underlying basic principles. The structure of this analysis Figure 1: Spot Market integrated the terminology of economics and engineering. As shown in SHORT-RUN ELECTRICITY MARKET Figure 1: Spot Market, the Energy Price Short-Run (¢/kWh) Marginal increasing short-run Cost Price at marginal cost of generation 7-7:30 p.m. defined the dispatch stack or supply curve. Thermal Demand efficiencies and fuel cost 7-7:30 p.m. Price at were the primary sources 9-9:30 a.m. of short-run generation cost Price at Demand differences. The 2-2:30 a.m. 9-9:30 a.m. introduction of markets Demand 2-2:30 a.m. added the demand Q1 Q2 Qmax perspective, where lower MW prices induced higher loads. -
Microgeneration Strategy: Progress Report
MICROGENERATION STRATEGY Progress Report JUNE 2008 Foreword by Malcolm Wicks It is just over two years since The Microgeneration Strategy was launched. Since then climate change and renewables have jumped to the top of the global and political agendas. Consequently, it is more important than ever that reliable microgeneration offers individual householders the chance to play their part in tackling climate change. In March 2006, there was limited knowledge in the UK about the everyday use of microgeneration technologies, such as solar thermal heating, ground source heat pumps, micro wind or solar photovolatics. Much has changed since then. Thousands of people have considered installing these technologies or have examined grants under the Low Carbon Buildings Programme. Many have installed microgeneration and, in doing so, will have helped to reduce their demand for energy, thereby cutting both their CO2 emissions and their utility bills. The Government’s aim in the Strategy was to identify obstacles to creating a sustainable microgeneration market. I am pleased that the majority of the actions have been completed and this report sets out the excellent progress we have made. As a consequence of our work over the last two years, we have benefited from a deeper understanding of how the microgeneration market works and how it can make an important contribution to a 60% reduction in CO2 emissions by 2050. Building an evidence base, for example, from research into consumer behaviour, from tackling planning restrictions and from tracking capital costs, means that we are now in a better position to take forward work on building a sustainable market for microgeneration in the UK. -
The Potential Air Quality Impacts from Biomass Combustion
AIR QUALITY EXPERT GROUP The Potential Air Quality Impacts from Biomass Combustion Prepared for: Department for Environment, Food and Rural Affairs; Scottish Government; Welsh Government; and Department of the Environment in Northern Ireland AIR QUALITY EXPERT GROUP The Potential Air Quality Impacts from Biomass Combustion Prepared for: Department for Environment, Food and Rural Affairs; Scottish Government; Welsh Government; and Department of the Environment in Northern Ireland This is a report from the Air Quality Expert Group to the Department for Environment, Food and Rural Affairs; Scottish Government; Welsh Government; and Department of the Environment in Northern Ireland, on the potential air quality impacts from biomass combustion. The information contained within this report represents a review of the understanding and evidence available at the time of writing. © Crown copyright 2017 Front cover image credit: left – Jamie Hamel-Smith, middle – Katie Chase, right – Tom Rickhuss on Stocksnap.io. Used under Creative Commons. United Kingdom air quality information received from the automatic monitoring sites and forecasts may be accessed via the following media: Freephone Air Pollution Information 0800 556677 Service Internet http://uk-air.defra.gov.uk PB14465 Terms of reference The Air Quality Expert Group (AQEG) is an expert committee of the Department for Environment, Food and Rural Affairs (Defra) and considers current knowledge on air pollution and provides advice on such things as the levels, sources and characteristics of air pollutants in the UK. AQEG reports to Defra’s Chief Scientific Adviser, Defra Ministers, Scottish Ministers, the Welsh Government and the Department of the Environment in Northern Ireland (the Government and devolved administrations). -
Microgeneration Certification Scheme: MCS 008
Microgeneration Certification Scheme: MCS 008 Product Certification Scheme Requirements: Biomass Issue 3.0 This Microgeneration Product Certification Standard is the property of Department of Energy and Climate Change (DECC), 3 Whitehall Place, London, SW1A 2HH. © DECC 2013 This Standard has been approved by the Steering Group of the Microgeneration Certification Scheme. This Standard was prepared by the Microgeneration Certification Scheme Working Group 5 ‘Biomass’. REVISION OF MICROGENERATION STANDARDS Microgeneration Standards will be revised by issue of revised editions or amendments. Details will be posted on the website at www.microgenerationcertification.org Technical or other changes which affect the requirements for the approval or certification of the product or service will result in a new issue. Minor or administrative changes (e.g. corrections of spelling and typographical errors, changes to address and copyright details, the addition of notes for clarification etc.) may be made as amendments. The issue number will be given in decimal format with the integer part giving the issue number and the fractional part giving the number of amendments (e.g. Issue 3.2 indicates that the document is at Issue 3 with 2 amendments). Users of this Standard should ensure that they possess the latest issue and all amendments. Issue: 3.0 PRODUCT CERTIFICATION SCHEME MCS: 008 REQUIREMENTS: BIOMASS Date: 01/11/2016 Page 2 of 31 TABLE OF CONTENTS FOREWORD .................................................................................................................. -
A"Review"Of"Commercially" Available"Technologies"For" Developing"Low:Carbon"Eco:Cities" !
ERNEST"ORLANDO"LAWRENCE" LBNL>179304! ! BERKELEY"NATIONAL"LABORATORY" ! A"Review"of"Commercially" Available"Technologies"for" Developing"Low:Carbon"Eco:cities" ! Nan!Zhou,!Gang!He,!John!Romankiewicz,!David!Fridley,!! and!Cecilia!Fino>Chen! ! " Energy"Technologies"Area" " " " " May"2015" " ! ! ! This!work!was!supported!through!the!U.S.!Department!oF!Energy!under! Contract!No.!DE>AC02>05CH11231.! ! ! ! Disclaimer! " This!document!was!prepared!as!an!account!of!work!sponsored!by!the!United! States! Government.! While! this! document! is! believed! to! contain! correct! information,!neither!the!United!States!Government!nor!any!agency!thereof,! nor!The!Regents!of!the!University!of!California,!nor!any!of!their!employees,! makes!any!warranty,!express!or!implied,!or!assumes!any!legal!responsibility! for!the!accuracy,!completeness,!or!usefulness!of!any!information,!apparatus,! product,! or! process! disclosed,! or! represents! that! its! use! would! not! infringe! privately!owned!rights.!Reference!herein!to!any!specific!commercial!product,! process,!or!service!by!its!trade!name,!trademark,!manufacturer,!or!otherwise,! does! not! necessarily! constitute! or! imply! its! endorsement,! recommendation,! or!favoring!by!the!United!States!Government!or!any!agency!thereof,!or!The! Regents! of! the! University! of! California.! The! views! and! opinions! of! authors! expressed!herein!do!not!necessarily!state!or!reflect!those!of!the!United!States! Government! or! any! agency! thereof,! or! The! Regents! of! the! University! of! California.! ! Ernest!Orlando!Lawrence!Berkeley!National!Laboratory!is!an!equal! -
Feasible Microgeneration System for Small Amounts of Solid Biomass As Fuel
International Journal of Smart Grid and Clean Energy Feasible microgeneration system for small amounts of solid biomass as fuel Jorge Bedolla-Hernández, Marcos Bedolla-Hernández , Vicente Flores-Lara , José Michael Cruz-García , and Carlos Alberto Mora-Santos Department of Metal-Mechanics, National Technological Institute of Mexico / Apizaco Institute of Technology, Av Tecnológico s/n, Apizaco, Tlaxcala, C.P. 90300, México. Abstract Solid biomass can be considered as an alternative to fossil fuels in microgeneration. Although there are currently options for biomass generation, these are mainly focused on continuous production, with the respective proportional amount of fuel consumption. In this study, the viability of applying a microgeneration system on a small scale is analyzed. The system uses solid biomass from forest residues as combustible. The size of the boiler in the system is similar to a domestic one with a capacity of 20 L. The study considers small amounts of solid biomass; therefore the arrangement of the initial configuration of the biomass in the fireplace is analyzed to achieve the best use of energy from combustion. The initial percentage of water contained in the boiler to reach a convenient relationship of steam and heating time of the system is analyzed. The amount of steam generated is small, and then the feed of steam to the turbine is variable in terms of mass flow and pressure; as well as its quality. For this reason, an adhesion turbine is integrated as part of the system to reduce the inconveniences in the operation of conventional turbines. The proposed system can operate in a range of up to 25000 rpm, depending on the variable mass flow. -
U.S. Power Sector Outlook 2021 Rapid Transition Continues to Reshape Country’S Electricity Generation
Dennis Wamsted, IEEFA Energy Analyst 1 Seth Feaster, IEEFA Data Analyst David Schlissel, IEEFA Director of Resource Planning Analysis March 2021 U.S. Power Sector Outlook 2021 Rapid Transition Continues To Reshape Country’s Electricity Generation Executive Summary The scope and speed of the transition away from fossil fuels, particularly coal, has been building for the past decade. That transition, driven by the increasing adoption of renewable energy and battery storage, is now nearing exponential growth, particularly for solar. The impact in the next two to three years is going to be transformative. In recognition of this growth, IEEFA’s 2021 outlook has been expanded to include separate sections covering wind and solar, battery storage, coal, and gas— interrelated segments of the power generation sector that are marked by vastly different trajectories: • Wind and solar technology improvements and the resulting price declines have made these two generation resources the least-cost option across much of the U.S. IEEFA expects wind and solar capacity installations to continue their rapid rise for the foreseeable future, driven not only by their cost advantage but also by their superior environmental characteristics. • Coal generation capacity has fallen 32% from its peak 10 years ago—and its share of the U.S. electricity market has fallen even faster, to less than 20% in 2020. IEEFA expects the coal industry’s decline to accelerate as the economic competition from renewables and storage intensifies; operational experience with higher levels of wind and solar grows; and public concern about climate change rises. • Gas benefitted in the 2010s from the fracking revolution and the assumption that it offered a bridge to cleaner generation. -
Dynamic Experimental Analysis of a Libr/H2O Single Effect Absorption Chiller with Nominal Capacity of 35 Kw of Cooling Acta Scientiarum
Acta Scientiarum. Technology ISSN: 1806-2563 ISSN: 1807-8664 [email protected] Universidade Estadual de Maringá Brasil Dynamic experimental analysis of a LiBr/ H2O single effect absorption chiller with nominal capacity of 35 kW of cooling Villa, Alvaro Antonio Ochoa; Dutra, José Carlos Charamba; Guerrero, Jorge Recarte Henríquez; Santos, Carlos Antonio Cabral dos; Costa, José Ângelo Peixoto Dynamic experimental analysis of a LiBr/H2O single effect absorption chiller with nominal capacity of 35 kW of cooling Acta Scientiarum. Technology, vol. 41, 2019 Universidade Estadual de Maringá, Brasil Available in: https://www.redalyc.org/articulo.oa?id=303260200003 DOI: https://doi.org/10.4025/actascitechnol.v41i1.35173 PDF generated from XML JATS4R by Redalyc Project academic non-profit, developed under the open access initiative Alvaro Antonio Ochoa Villa, et al. Dynamic experimental analysis of a LiBr/H2O single effect absor... Engenharia Mecânica Dynamic experimental analysis of a LiBr/H2O single effect absorption chiller with nominal capacity of 35 kW of cooling Alvaro Antonio Ochoa Villa DOI: https://doi.org/10.4025/actascitechnol.v41i1.35173 1Instituto Federal de Tecnologia de Pernambuco / Redalyc: https://www.redalyc.org/articulo.oa? 2Universidade Federal de Pernambuco, Brasil id=303260200003 [email protected] José Carlos Charamba Dutra Universidade Federal de Pernambuco, Brasil Jorge Recarte Henríquez Guerrero Universidade Federal de Pernambuco, Brasil Carlos Antonio Cabral dos Santos 2Universidade Federal de Pernambuco 3Universidade Federal da Paraíba, Brasil José Ângelo Peixoto Costa 1Instituto Federal de Tecnologia de Pernambuco2Universidade Federal de Pernambuco, Brasil Received: 01 February 2017 Accepted: 20 September 2017 Abstract: is paper examines the transient performance of a single effect absorption chiller which uses the LiBr/H2O pair with a nominal capacity of 35 kW. -
Challenges Facing Combined Heat and Power Today: a State-By-State Assessment
Challenges Facing Combined Heat and Power Today: A State-by-State Assessment Anna Chittum and Nate Kaufman September 2011 Report Number IE111 © American Council for an Energy-Efficient Economy 529 14th Street, N.W., Suite 600, Washington, D.C. 20045 (202) 507-4000 phone, (202) 429-2248 fax, www.aceee.org Challenges Facing Combined Heat and Power Today, © ACEEE CONTENTS Executive Summary ...................................................................................................................................... iii Acknowledgments ......................................................................................................................................... v Glossary ........................................................................................................................................................ vi Introduction.................................................................................................................................................... 1 Combined Heat and Power Today ........................................................................................................... 1 Methodology ............................................................................................................................................. 5 Part I: General Findings ................................................................................................................................ 6 Economics ...............................................................................................................................................