Download or read book NREL Documents Efficiency of Mini Split Heat Pumps Fact Sheet written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new report delivers mini-split heat pump (MSHP) performance data for use in whole-building simulation tools.

Download or read book NREL Documents Efficiency of Mini Split Heat Pumps Fact Sheet written by and published by . This book was released on 2012 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new report delivers mini-split heat pump (MSHP) performance data for use in whole-building simulation tools. Mini-split heat pumps (MSHPs) are highly efficient refrigerant-based air conditioning and heating systems that permit room-by-room conditioning and control in homes. Because of their size, efficiency, and price, MSHPs are very popular overseas and are gaining market share in energy-efficient home upgrades in the United States. They are a good option for retrofitting older homes that lack ductwork. To evaluate MSHP cost effectiveness and performance in U.S. homes, National Renewable Energy Laboratory (NREL) researchers are studying these systems in the laboratory, simulated buildings, and field test settings. A new NREL report describes an innovative laboratory approach to testing MSHPs and includes experimental performance maps for use in whole-building simulation tools. Most public information on MSHP performance is provided by equipment manufacturers, and is typically limited to performance at a single operating speed for heating and cooling. Mini-split heat pumps use variable speed components that spin up and down to continuously meet the heating or cooling need, significantly improving a system's operating efficiency. Measuring that efficiency in a laboratory is challenging and required new approaches to performance testing. NREL researchers worked with colleagues at Purdue University's Herrick Labs and Ecotope, Inc. to refine and apply this new approach to a suite of MSHP products. Researchers measured the performance of two MSHPs across a variety of operating conditions, which allowed, for the first time, development of accurate building simulation MSHP models. In the laboratory tests, researchers found that both MSHPs achieved manufacturer-reported performance at rating conditions. However, at other temperature and humidity conditions, the heat pumps capacity ranged from 40% above to 54% below the manufacturer-reported values. Knowing how performance varies is critical in order to reasonably estimate annual energy consumption of a MSHP, and to compare MSHPs to other heating and cooling options. Mini-split heat pump efficiency (COP) was seen to significantly exceed rated efficiency at low compressor speeds-a very important effect.

Download or read book NREL Delivers In Home HVAC Efficiency Testing Solutions Fact Sheet written by and published by . This book was released on 2012 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers at the National Renewable Energy Laboratory (NREL) have recently developed two simple in-home efficiency test methods that can be used by technicians, researchers, or interested homeowners to verify the correct operation and energy efficiency of a home's air conditioning equipment. An efficiency validation method for mini-split heat pumps (MSHPs) - highly efficient refrigerant-based air conditioning and heating systems that permit room-by-room conditioning and control - will enable building researchers to easily explore the installed performance of this class of equipment. MSHPs are very popular overseas and are gaining market share in energy efficient home upgrades throughout the United States. Yet, because MSHPs have multiple variable-speed components that work in tandem, their performance is challenging to measure in a real home. NREL researchers developed a field evaluation method including test equipment, methods, and data analysis to determine the installed performance of this equipment in occupied homes. A field test was conducted to validate the method. When testing a home's operation, it is often important to simulate occupancy within an unoccupied home. That way, the researcher will know the actual usage profiles for heat and moisture generation; this removes the uncertainty associated with real occupants. The second test method details a standardized protocol for generating heat and moisture loads, to mimic occupants and their activities by using heaters and humidifiers. Realistic heat and moisture loads can be used to drive air conditioning systems, evaluate air distribution systems, and examine building enclosure technologies. These loads are drawn from the Building America House Simulation Protocols. Proper application of the method will result in better comparison between performance of the test home and its simulated analogue. This method is also validated by field testing. These test methods are now available in two technical reports. The methods can be used widely by the building research community to confirm proper operation of space conditioning equipment in homes, thereby improving thermal comfort, building health, and durability. National objectives for cost-effective energy savings in the residential sector can be met more quickly and with greater consistency.

Download or read book Assessment of Low Cost Minisplit Heat Pump Connection System written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was funded by SCE's Emerging Technologies Program, and evaluates the feasibility of a connection system that can pave the path to accelerated, cost-effective adoption of high-efficiency Minisplit Heat Pump (MSHP) systems. This report details the characterization of this connection system and a heat pump enabled with this technology in a laboratory setting, and assesses the energy and cost impact applicable to residential buildings in SCE service territory. The energy and economic analysis leverages NREL's ResStock (TM) modeling approach based on the EnergyPlus (R) hourly simulation platform. The connection system can be incorporated into existing MSHP architectures. This reduces installation time from 10 to 20 man hours to approximately one hour or less, dramatically lowering total installation costs without adversely impacting heat pump performance. This report characterizes the connection system's leakage performance while connected and disconnected, as well as leakage over several connection/disconnection cycles, commensurate with manufacturer specifications for the individual components. The connector was incorporated into an off-the-shelf MSHP. Performance was compared to an identical unmodified heat pump. The connector had no impact on performance. Large-scale hourly energy simulations were performed for 22,574 homes across 15 counties in SCE service territory. The analysis was performed using baseline assumptions about the penetrations of window air conditioners (~18%) and six upgrade scenarios for these air conditioners. All scenarios assumed 100% adoption of the Connector-Supported Heat Pump (CSHP) in place of window air conditioners: MSHPs at Seasonal Energy Efficiency Ratio (SEER) 17, 25, and 33, and CSHPs at SEER 17, 25, and 33. Results show the increased adoption of high-efficiency heat pumps can result in up to 29% air conditioning energy savings for homes with window air conditioners.

Download or read book Annual Energy Outlook written by and published by . This book was released on 1992 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field Monitoring Protocol written by and published by . This book was released on 2011 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report provides a detailed method for accurately measuring and monitoring performance of a residential Mini-Split Heat Pump. It will be used in high-performance retrofit applications, and as part of DOE's Building America residential research program.

Download or read book An Integrated Control Method for Supplemental Minisplit Heat Pumps in Existing Homes written by and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Florida Solar Energy Center (FSEC), a research institute of the University of Central Florida, has investigated low-cost space-conditioning upgrade solutions for existing homes since 2014. The retrofits involve installing a modest-capacity, centrally located, high-efficiency, ductless, minisplit heat pump (MSHP) for use in conjunction with the home's existing central space-conditioning system (CSCS). A retrofit targets homes with older but not obsolete CSCSs that have not reached end of life, and presents a more cost-effective option to achieve space-conditioning energy savings than outright CSCS replacement. Energy savings are achieved by using the high-efficiency MSHP to offset runtime of the lower-efficiency CSCS, which also achieves reductions in associated duct losses and duct-leakage-induced infiltration.

Download or read book Renewable Energy Sources and Climate Change Mitigation written by Ottmar Edenhofer and published by Cambridge University Press. This book was released on 2011-11-21 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Intergovernmental Panel on Climate Change Special Report (IPCC-SRREN) assesses the potential role of renewable energy in the mitigation of climate change. It covers the six most important renewable energy sources - bioenergy, solar, geothermal, hydropower, ocean and wind energy - as well as their integration into present and future energy systems. It considers the environmental and social consequences associated with the deployment of these technologies, and presents strategies to overcome technical as well as non-technical obstacles to their application and diffusion. SRREN brings a broad spectrum of technology-specific experts together with scientists studying energy systems as a whole. Prepared following strict IPCC procedures, it presents an impartial assessment of the current state of knowledge: it is policy relevant but not policy prescriptive. SRREN is an invaluable assessment of the potential role of renewable energy for the mitigation of climate change for policymakers, the private sector, and academic researchers.

Download or read book Global Renewables Outlook Energy Transformation 2050 written by International Renewable Energy Agency IRENA and published by International Renewable Energy Agency (IRENA). This book was released on 2020-04-01 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This outlook highlights climate-safe investment options until 2050, policies for transition and specific regional challenges. It also explores options to eventually cut emissions to zero.

Download or read book NREL Delivers In Home HVAC Efficiency Testing Solutions Fact Sheet written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers at the National Renewable Energy Laboratory (NREL) have recently developed two simple in-home efficiency test methods that can be used by technicians, researchers, or interested homeowners to verify the correct operation and energy efficiency of a home?s air conditioning equipment.

Download or read book Net Zero Energy Buildings written by Linda Reeder and published by Routledge. This book was released on 2016-03-31 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents 18 in-depth case studies of net zero energy buildings—low-energy building that generate as much energy as they consume over the course of a year—for a range of project types, sizes, and U.S. climate zones. Each case study describes the owner’s goals, the design and construction process, design strategies, measurement and verification activities and results, and project costs. With a year or more of post-occupancy performance data and other project information, as well as lessons learned by project owners and developers, architects, engineers, energy modelers, constructors, and operators, each case study answers the questions: What were the challenges to achieving net zero energy performance, and how were these challenges overcome? How would stakeholders address these issues on future projects? Are the occupants satisfied with the building? Do they find it comfortable? Is it easy to operate? How can other projects benefit from the lessons learned on each project? What would the owners, designers, and constructors do differently knowing what they know now? A final chapter aggregates processes to engage in and pitfalls to avoid when approaching the challenges peculiar to designing, constructing, and owning a net zero energy building. By providing a wealth of comparable information, this book which will flatten the learning curve for designing, constructing, and owning this emerging building type and improve the effectiveness of architectural design and construction.

Download or read book Annual Energy Outlook 2010 with Projections To 2035 written by and published by Government Printing Office. This book was released on 2010-06-09 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Where the Wind Blows Us unites critical practice with a community-based approach to archaeology. Author Natasha Lyons describes an inclusive archaeology that rests on a flexible but rigorous approach to research design and demonstrates a responsible, ethical practice. She traces the rise and application of community archaeologies, develops a wide-ranging set of methods for community practice, and maps out a “localized critical theory” that is suited to the needs of local and descendant communities as they pursue self-defined heritage goals. Localized critical theory aims to decenter the focus on global processes of capitalism in favor of the local processes of community dynamics. Where the Wind Blows Us emphasizes the role of individuals and the relationships they share with communities of the past and present. Lyons offers an extended case study of her work with the Inuvialuit community of the Canadian Western Arctic. She documents the development of this longstanding research relationship and presents both the theoretical and practical products of the work to date. Integrating knowledge drawn from archaeology, ethnography, oral history, and community interviews, Lyons utilizes a multivocal approach that actively listens to Inuvialuit speak about their rich and textured history. The overall significance of this volume lies in outlining a method of practicing archaeology that embraces local ways of knowing with a critically constructed and evolving methodology that is responsive to community needs. It will serve as a handbook to mine for elements of critical practice, a model of community-based archaeology, and a useful set of concepts and examples for classroom study.

Download or read book Future of solar photovoltaic written by International Renewable Energy Agency IRENA and published by International Renewable Energy Agency (IRENA). This book was released on 2019-11-01 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study presents options to fully unlock the world’s vast solar PV potential over the period until 2050. It builds on IRENA’s global roadmap to scale up renewables and meet climate goals.

Download or read book 2009 ASHRAE Handbook written by Mark S. Owen and published by Amer Society of Heating. This book was released on 2009 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2009 ASHRAE Handbook-Fundamentals covers basic principles and data used in the HVAC&R industry. The ASHRAE Technical Committees that prepare these chapters strive not only to provide new information, but also to clarify existing information, delete obsolete materials, and reorganize chapters to make the Handbook more understandable and easier to use. An accompanying CD-ROM contains all the volume's chapters in both I-P and SI units.

Download or read book Handbook on Battery Energy Storage System written by Asian Development Bank and published by Asian Development Bank. This book was released on 2018-12-01 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook serves as a guide to deploying battery energy storage technologies, specifically for distributed energy resources and flexibility resources. Battery energy storage technology is the most promising, rapidly developed technology as it provides higher efficiency and ease of control. With energy transition through decarbonization and decentralization, energy storage plays a significant role to enhance grid efficiency by alleviating volatility from demand and supply. Energy storage also contributes to the grid integration of renewable energy and promotion of microgrid.

Download or read book Variable Speed Pumping written by Europump & the Hydraulic Europump & the Hydraulic Insti and published by Elsevier. This book was released on 2004-06-10 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared by industry experts from the pump, motor and drive industries under the auspices of Europump and the Hydraulic Institute, this reference book provides a comprehensive guide to variable speed pumping.It includes technical descriptions of pumping systems and their components, and guides the reader through the evaluation of different speed control options.Case studies help illustrate the life cycle cost savings and process improvements that appropriate variable speed pumping can deliver.·Authoritative, global reference to Variable Speed Pumping, by Europump and the Hydraulic Institute·Combines the technical knowledge of pump, motor and control systems in one guide·Brings together all the concepts, metrics and step-by-step decision-making support you need to help you decide which VSD strategies are most appropriate·Will help you design and specify pumping applications that minimise life-cycle costs

Download or read book Energy for Sustainability written by John Randolph and published by . This book was released on 2018 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite a 2016-18 glut in fossil fuel markets and decade-low fuel prices, the global transformation to sustainable energy is happening. Our ongoing energy challenges and solutions are complex and multidimensional, involving science, technology, design, economics, finance, planning, policy, politics, and social movements. The most comprehensive book on this topic, Energy for Sustainability has been the go-to resource for courses. This new edition has been thoroughly revised and updated to inform and guide students and practitioners who will steer this transformation. Drawing on a combined 80 years of teaching experience, John Randolph and Gilbert Masters take a holistic and interdisciplinary approach. Energy for Sustainability can help techies and policymakers alike understand the mechanisms required to enable conversion to energy that is clean, affordable, and secure. Major revisions to this edition reflect the current changes in technology and energy use and focus on new analyses, data, and methods necessary to understand and actively participate in the transition to sustainable energy. The book begins with energy literacy, including patterns and trends, before covering the fundamentals of energy related to physics, engineering, and economics. The next parts explore energy technologies and opportunities in three important energy sectors: buildings, electricity, and transportation. The final section focuses on policy and planning, presenting the critical role of public policy and consumer and investor choice in transforming energy markets to greater sustainability. Throughout the book, methods for energy and economic analysis and design give readers a quantitative appreciation for and understanding of energy systems. The book uses case studies extensively to demonstrate current experience and illustrate possibilities.