Cooling Emissions and Policy Synthesis Report: Benefits of Cooling Efficiency and the Kigali Amendment
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Fifth-Generation District Heating and Cooling Substations: Demand Response with Artificial Neural Network-Based Model Predictive Control
energies Article Fifth-Generation District Heating and Cooling Substations: Demand Response with Artificial Neural Network-Based Model Predictive Control Simone Buffa 1,*, Anton Soppelsa 1 , Mauro Pipiciello 1, Gregor Henze 2,3,4 and Roberto Fedrizzi 1 1 Eurac Research, Institute for Renewable Energy, Viale Druso 1, 39100 Bolzano, Italy; [email protected] (A.S.); [email protected] (M.P.); [email protected] (R.F.) 2 Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309-0428, USA; [email protected] 3 National Renewable Energy Laboratory, Golden, CO 80401, USA 4 Renewable and Sustainable Energy Institute, Boulder, CO 80309, USA * Correspondence: simone.buff[email protected]; Tel.: +39-0471-055636 Received: 16 July 2020; Accepted: 11 August 2020; Published: 21 August 2020 Abstract: District heating and cooling (DHC) is considered one of the most sustainable technologies to meet the heating and cooling demands of buildings in urban areas. The fifth-generation district heating and cooling (5GDHC) concept, often referred to as ambient loops, is a novel solution emerging in Europe and has become a widely discussed topic in current energy system research. 5GDHC systems operate at a temperature close to the ground and include electrically driven heat pumps and associated thermal energy storage in a building-sited energy transfer station (ETS) to satisfy user comfort. This work presents new strategies for improving the operation of these energy transfer stations by means of a model predictive control (MPC) method based on recurrent artificial neural networks. The results show that, under simple time-of-use utility rates, the advanced controller outperforms a rule-based controller for smart charging of the domestic hot water (DHW) thermal energy storage under specific boundary conditions. -
Performance Prediction of a Solar District Cooling System in Riyadh, Saudi T Arabia – a Case Study ⁎ G
Energy Conversion and Management 166 (2018) 372–384 Contents lists available at ScienceDirect Energy Conversion and Management journal homepage: www.elsevier.com/locate/enconman Performance prediction of a solar district cooling system in Riyadh, Saudi T Arabia – A case study ⁎ G. Franchini , G. Brumana, A. Perdichizzi Department of Engineering and Applied Sciences, University of Bergamo, 5 Marconi Street, Dalmine 24044, Italy ARTICLE INFO ABSTRACT Keywords: The present paper aims to evaluate the performance of a solar district cooling system in typical Middle East Solar cooling climate conditions. A centralized cooling station is supposed to distribute chilled water for a residential com- District cooling pound through a piping network. Two different solar cooling technologies are compared: two-stage lithium- Parabolic trough bromide absorption chiller (2sABS) driven by Parabolic Trough Collectors (PTCs) vs. single-stage lithium-bro- Absorption chiller mide absorption chiller (1sABS) fed by Evacuated Tube Collectors (ETCs). A computer code has been developed Thermal storage in Trnsys® (the transient simulation software developed by the University of Wisconsin) to simulate on hourly basis the annual operation of the solar cooling system, including building thermal load calculation, thermal losses in pipes and control strategy of the energy storage. A solar fraction of 70% was considered to size the solar field aperture area and the chiller capacity, within a multi-variable optimization process. An auxiliary com- pression chiller is supposed to cover the peak loads and to be used as backup unit. The two different solar cooling plants exhibit strongly different performance. For each plant configuration, the model determined the optimal size of every component leading to the primary cost minimization. -
District Cooling Systems
DEPARTMENT OF TECHNOLOGY AND BUILT ENVIRONMENT TECHNOLOGICAL AND ECONOMIC EVALUATION OF DISTRICT COOLING WITH ABSORPTION COOLING SYSTEMS IN GÄVLE (SWEDEN) Elixabet Sarasketa Zabala June 2009 Master’s Thesis in Energy Systems uuir Master Programme in Energy Systems Examiner: Ulf Larsson Supervisor: Åke Björnwall Preface This investigation, as final Thesis Project of Master in Energy Systems (University of Gävle), was started to carry out in February, in collaboration with the company Gävle Energi AB. Many people have been involved answering my questions, providing me with information and so forth; some of those are mentioned below. First of all, I would like to thank Åke Björnwall, my supervisor at Gävle Energi AB, very much for his attention, help and support. His knowledge, comments, guidance and advices have been essential for the development of my work. Needless to say that I have learnt a lot from him. Secondly, I would like to thank the rest of workers at Gävle Energi AB, who have done everything they can to help me, in addition to make pleasant my stay in the company. I would also like to thank Ulf Larsson at the University of Gävle for his help. Furthermore, I am very grateful for all information I have received from other companies. Finally, I do not forget the invaluable support of my mother, Rosa, during all my studies. No one mentioned, no one forgotten. Gävle, June 2009 Elixabet Sarasketa Zabala Abstract Gävle Energi AB is a company which produces electricity as well as heat that is delivered through a district heating network in the municipality of Gävle. -
District Energy Enters the 21St Century
TECHNICAL FEATURE This article was published in ASHRAE Journal, July 2015. Copyright 2015 ASHRAE. Posted at www.www.burnsmcd.com .org. This article may not be copied and/or distributed electronically or in paper form without permission of ASHRAE. For more information about ASHRAE Journal, visit www.ashrae.org. District Energy Enters The 21st Century BY STEVE TREDINNICK, P.E., MEMBER ASHRAE; DAVID WADE, P.E., LIFE MEMBER ASHRAE; GARY PHETTEPLACE, PH.D., P.E., MEMBER ASHRAE The concept of district energy is undergoing a resurgence in some parts of the United States and the world. Its roots in the U.S. date back to the 19th century and through the years many technological advancements and synergies have developed that help district energy efficiency. This article explores district energy and how ASHRAE has supported the industry over the years. District Energy’s Roots along with systems serving groups of institutional build- District energy systems supply heating and cooling ings, were initiated and prospered in the early decades to groups of buildings in the form of steam, hot water of the 1900s and by 1949 there were over 300 commercial or chilled water using a network of piping from one or systems in operation throughout the United States. Of more central energy plants. The concept has been used course, systems in the major cities of Europe also gained in the United States for more than 140 years with the favor in Paris, Copenhagen and Brussels. In many cases first recognized commercial district energy operation district steam systems were designed to accept waste originating in Lockport, N.Y. -
Kigali Amendment to the Montreal Protocol: a Crucial Step in the Fight Against Catastrophic Climate Change
EIA Briefing to the 22 nd Conference of the Parties (CoP22) to the United Nations Framework Convention on Climate Change (UNFCCC) November 7-18, 2016, Marrakech, Morocco Kigali amendment to the montreal Protocol: A Crucial Step in the Fight Against Catastrophic Climate Change In October 2016, the 28 th Meeting of the Parties to the Montreal Protocol adopted the Kigali Amendment on hydrofluorocarbons (HFCs), which commits the world’s nations to significantly reduce consumption and production of HFCs. 1 The Kigali Amendment, which could avoid emissions of well over 70 billion tonnes carbon dioxide-equivalent (CO 2e) by 2050, marks an historic achievement and brings significant impetus to the Paris Agreement which comes into force this month. and 2024 for developing countries. The HFC reductions MONTreAl PrOTOCOl ANd HFC s are measured on the basis of overall CO 2e impact as HFCs have widely differing Global Warming Potentials The Montreal Protocol is widely hailed as the (GWP), ranging from 53 to 14,800. 4 The agreement most successful environmental agreement to includes two phase-down options for developing countries date, phasing out 98 per cent of ozone-depleting (Article 5 or A5 Parties) and an earlier phase-down substances (OdS) and putting the ozone layer on schedule for developed countries (non-Article 5 or non- the path to recovery by the middle of this century. A5 Parties). Since most OdS such as hydrochlorofluorocarbons (HCFCs) While the majority of non-A5 parties will begin phasing and chlorofluorocarbons (CFCs) are also powerful greenhouse down HFC consumption with a 10 per cent reduction gases (GHGs), the Montreal Protocol has avoided more than in 2019, a small group of non-A5 countries (Belarus, 135 billion tonnes CO 2e emissions through phasing out their Kazakhstan, Russian Federation, Tajikistan and production and consumption. -
Production of District Heating, District Cooling, Electricity and Biogas Our
Our dream – a city free from fossil fuels Application – First Global District Energy Climate Awards Production of district heating, district cooling, electricity and biogas Borås Energi och Miljö AB, Sweden Borås Energi och Miljö AB, is a municipally owned company and part of Borås Stadshus AB. Contact: Jonas Holmberg – Head of Marketing, +46 33 35 72 20, [email protected] www.borasenergimiljo.se Part of Borås Stadshus AB Borås is Sweden’s 13th largest municipally. Around 64,000 people live in Borås City, and over 100,000 The accumulator tank. throughout the municipality. Borås Energi och Miljö AB (BEM) is a municipally owned company that handles refuse and the production of district heating, cooling and electricity in the municipality of Borås. The company has a vision of a city free from fossil fuels. BEM runs a number of facilities and services, all of which contribute to the reduction of greenhouse gas emissions in one way or another. The term “emissions” used in thes document usally refers to greenhouse gases. First off, please watch our company movie for a quick tour of our company. Click here to watch the movie. We harness all energy streams Whenever they sort their household waste, travel on Today Borås City is a pioneer when it comes to working biogas buses, relax at home with comfortable district in harmony with the biological cycle, and we look on heating or spend time at an office with pleasant district combustible household refuse as a valuable energy cooling, the inhabitants of Borås play an important role resource – energy that would otherwise be wasted. -
Ratification of the Kigali Amendment
Ratification of the Kigali Amendment IN TRINIDAD AND TOBAGO Details of Kigali Amendment to the Protocol, the Kigali Amendment, was adopted at the Twenty Eighth (28th) Meeting of the Parties to the Montreal Protocol held in Kigali, Rwanda in October 2016. This fifth Amendment reaffirms global commitment to the protection of the ozone layer as well as consideration of the effects ozone depleting substances on the climate. The commitment affirms through the phase down of the powerful climate-warming pollutants called hydrofluorocarbons (HFCs) under the Montreal Protocol. This Amendment was agreed to by all 197 Parties to the Montreal Protocol. Trinidad and Tobago The country attended the Kigali meeting and coming out of that meeting the meeting report was prepared and a draft Cabinet Note prepared with information regarding: ✓The details of the proposed amendment, phase down targets, dates, history of MP and current country implementation strategies and targets. ✓The justification for the amendment included Kigali being instrumental in TT meeting our climate obligations as well as future obligations under the MP. Cabinet Note sent for approval included the following items: ✓ The Kigali Amendment is seen as crucial as it comes just after the landmark Paris Agreement under the United Nations Convention for Climate Change (UNFCCC), which aims at reducing carbon dioxide (CO2) emissions. Together these two instruments will have a significant impact in the addressing the effects of climate change. ✓ Twinned with the Vision 2030 ✓ Climate ratification for the Paris agreement and the Carbon reduction strategies ✓ Emphasized that ratification was necessary to access any offers of funding under the Protocol. -
District Cooling Versus Individual Cooling in Urban Energy Systems: the Impact of District Energy Share in Cities on the Optimal Storage Sizing
energies Article District Cooling Versus Individual Cooling in Urban Energy Systems: The Impact of District Energy Share in Cities on the Optimal Storage Sizing Dominik Franjo Dominkovi´c 1,* and Goran Krajaˇci´c 2 1 Department of Applied Mathematics and Computer Science, Technical University of Denmark, Matematiktorvet, 2800 Kgs. Lyngby, Denmark 2 Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lucica 5, 10000 Zagreb, Croatia; [email protected] * Correspondence: [email protected]; Tel.: +45-93-511-530 Received: 25 December 2018; Accepted: 26 January 2019; Published: 28 January 2019 Abstract: The energy transition of future urban energy systems is still the subject of an ongoing debate. District energy supply can play an important role in reducing the total socio-economic costs of energy systems and primary energy supply. Although lots of research was done on integrated modelling including district heating, there is a lack of research on integrated energy modelling including district cooling. This paper addressed the latter gap using linear continuous optimization model of the whole energy system, using Singapore for a case study. Results showed that optimal district cooling share was 30% of the total cooling energy demand for both developed scenarios, one that took into account spatial constraints for photovoltaics installation and the other one that did not. In the scenario that took into account existing spatial constraints for installations, optimal capacities of methane and thermal energy storage types were much larger than capacities of grid battery storage, battery storage in vehicles and hydrogen storage. Grid battery storage correlated with photovoltaics capacity installed in the energy system. -
District Cooling Plant with High Efficiency Chiller and Ice Storage
District Cooling Plant with High Efficiency Chiller and Ice Storage System YOSHINORI HIDA*1 SEIJI SHIBUTANI*1 MATSUYUKI AMANO*1 NORIYASU MAEHARA*2 Mitsubishi Heavy Industries, Ltd. (MHI) received an order from Singapore District Cooling Pte, Ltd., for a district cooling plant with a cooling capacity of 57 MW (16,210 RT). This project was an engineering, procurement, and construction contract that included the design, manufacture, procurement, construction, and commissioning of a high-efficiency district cooling plant that would serve as a model for South East Asia where the year-round cooling demand is high. One year has now elapsed since the start of commercial operation, and this plant is currently operating at higher efficiency than originally planned. This report describes the performance improvement technologies, such as the centrifugal chiller and ice storage system, that were introduced to achieve this increased efficiency. the movement and maintainability of each machine and 1. Introduction piping system into the design. In addition, MHI reduced The Government of Singapore has developed the Marina the cost of the detailed design using automatic isometric South area to include a district cooling plant and an advanced drawings for the plant piping with 3D CAD. telecommunication infrastructure. This area is beginning to take on a role as an important business center in Singapore. MHI received an order for the first district cooling plant in Table 1 Main equipment of heat source components of No. 1 plant this area from Singapore District Cooling Pte, Ltd. (SDC)Note, Quantity Quantity and delivered and handed over the plant in 2007 as a model of Chillers during at time of first stage completion high-efficiency technology. -
Hydrofluorocarbon Phasedown: Issues for Congress
March 3, 2021 Hydrofluorocarbon Phasedown: Issues for Congress Congress enacted legislation—the American Innovation including the United States, agreed to the 1985 Vienna and Manufacturing (AIM) Act of 2020—to phase down Convention for the Protection of the Ozone Layer. hydrofluorocarbons (HFCs) domestically (P.L. 116-260, Division S, §103). HFCs are potent greenhouse gases Montreal Protocol (MP) (GHGs) used in air conditioning, refrigeration, foam Parties to the Vienna Convention adopted the subsidiary blowing agents, insulation, and other applications. Multiple MP in 1987 to set binding, quantitative schedules for scientific assessments conclude that anthropogenic GHGs countries to phase out listed ODS. The MP provides for (e.g., carbon dioxide and HFCs) have been a major driver international cooperation on ODS substitutes and research, of observed climate change since 1950. financial assistance, and trade restrictions with nonparties. The United States is among the 197 parties to the Vienna AIM establishes a 15-year timeline to reduce domestic HFC Convention and the MP. production and consumption and directs the U.S. Environmental Protection Agency (EPA) to implement Kigali Amendment to the MP AIM’s requirements, including through regulations. AIM’s As MP parties agreed to accelerate the phaseout of certain phasedown schedule appears to align with international ODS, discussions turned to the projected growth in HFCs as commitments to phase down HFCs under the Kigali ODS replacements. In 2016, MP parties agreed to phase Amendment to the Montreal Protocol. The United States is down HFCs and adopted the Kigali Amendment to the MP, a party to the Montreal Protocol (MP). As of early March its fifth amendment. -
Geothermal Space Cooling
Proceedings, 6th African Rift Geothermal Conference Addis Ababa, Ethiopia, 2nd – 4th November 2016 GEOTHERMAL SPACE COOLING Thorleikur Johannesson, Yngvi Gudmundsson and Kristin Gudmundsdottir Verkis Consulting Engineers Ofanleiti 2 – 103 Reykjavík ICELAND [email protected], [email protected], [email protected] ABSTRACT The paper will propose an introduction to the heat pump technology applied to geothermal space cooling and give examples of how it can be used. Geothermal ground source heat pumps are currently the most widespread form of geothermal utilization. They usually require rather low enthalpy geothermal resources and can be used for both heating and cooling purposes as their cycle is reversible. Such equipment required a significant electrical input. On the other hand, geothermal heat pumps for cooling purpose is something completely different. Instead of using electricity for the heat pump compressor, like in a normal cooling machine or a refrigerator, the heat from a geothermal resource is used as the driving energy in an absorption heat pump, often named geothermal absorption chillers. Market prospects for residential and space cooling indicate that a steady increase can be expected in the coming years. The paper will indicate potential cooling demand in various places in around the African rift where geothermal energy is available. In addition to presenting and comparing the most common cooling methods, a basic business case will be developed. 1. INTRODUCTION Geothermal ground source heat pumps are currently the most widespread form of geothermal utilization. Geothermal heat pumps for decentralized applications are rather common in Europe. As the cycle on which the heat pumps are based is reversible, they can be applied for both heating and cooling purposes. -
Consumer Cost Impacts of U.S. Ratification of the Kigali Amendment
In Partnership with Consumer Cost Impacts of U.S. Ratification of the Kigali Amendment Report Prepared for the Air-Conditioning, Heating, & Refrigeration Institute and the Alliance for Responsible Atmospheric Policy November 9, 2018 Final Report Consumer Cost Impacts of U.S. Ratification of the Kigali Amendment For more information about the report, please contact: Douglas S. Meade, Ph.D. Executive Director Inforum (301) 405-4608 [email protected] Joseph M. Steed, Ph.D. Principal JMS Consulting [email protected] JMS Consulting in Partnership with: Inforum www.inforum.umd.edu Prepared for: The Air-Conditioning, Heating, and Refrigeration Institute 2311 Wilson Blvd, Suite 400 Arlington, VA 22201 and Alliance for Responsible Atmospheric Policy 2111 Wilson Blvd., 8th Floor Arlington, VA 22201 Blank Page Consumer Cost Impacts of U.S. Ratification of the Kigali Amendment Table of Contents Abbreviations .............................................................................................................................................. v List of Tables ................................................................................................................................................. v List of Figures ................................................................................................................................................ v Executive Summary .................................................................................................................................... 1 Background on the Kigali Amendment