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Analysis And Simulation Of Dual Source Heat Pumps With Three Fluid Evaporators
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Book Synopsis Analysis and Simulation of Dual-source Heat Pumps with Three-fluid Evaporators by : Jai-Hyo Lee
Download or read book Analysis and Simulation of Dual-source Heat Pumps with Three-fluid Evaporators written by Jai-Hyo Lee and published by . This book was released on 1989 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: When the ambient temperature drops, air-source heat pumps deliver less heating per unit of power input and usually cannot provide for the heating load. Therefore, dual-source heat pumps can offer an attractive alternative. In the context of this work, a dual-source heat pump operates as an air-source unit under normal conditions but as a water-source unit when ambient air conditions are unfavorable. The main objective of this thesis is the analysis and computer simulation of a dual-source heat pump with a three-fluid evaporator. This includes the mathematical analysis and the development of the performance model for the three-fluid evaporator. For the two-phase state in the evaporator, the mixed model based on the Baroczy correlation was used to calculate the pressure drop and Shah's chart method was used to calculate the heat transfer coefficient. Using the three-fluid evaporator model, a dual-source heat pump model was developed based on the Oak Ridge National Laboratory (ORNL) model for air-source units. An optimization method, using the Modular In-Core Non-Linear Optimization System (MINOS) package, was applied to determine the optimal design variables for the evaporator. Finally, using weather data and load conditions, the annual performance factor (APF) simulation program for this heat pump was developed to obtain the optimal capacity, optimal switching temperature, minimum water temperature and so on. The results from the three-fluid evaporator model show that the developed model predicts pressure drops and overall heat transfer coefficients within 3 to 21 percent error range in comparison to experimental data. The coefficient of performance (COP) of the water-source operation of the dual-source heat pump was 20 percent greater than when the unit was operated as an air-source heat pump at 8.3 °C (47 F). Under the same conditions, the dual-source APF also reflected a 45 percent increase when compared to purely air-source operations. The nominal size of the dual-source heat pump (compressor, condenser and evaporator) can be reduced to a value three-fifths that of the air-source heat pump that would normally be specified under identical conditions.
Book Synopsis The Design and Development of a Split Evaporator Heat Pump System by : Mason H. Somerville
Download or read book The Design and Development of a Split Evaporator Heat Pump System written by Mason H. Somerville and published by . This book was released on 1981 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Heat Exchangers for Heat Pump Applications by : Marco Fossa
Download or read book Design of Heat Exchangers for Heat Pump Applications written by Marco Fossa and published by MDPI. This book was released on 2020-12-28 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat pumps (HPs) allow for providing heat without direct combustion, in both civil and industrial applications. They are very efficient systems that, by exploiting electrical energy, greatly reduce local environmental pollution and CO2 global emissions. The fact that electricity is a partially renewable resource and because the coefficient of performance (COP) can be as high as four or more, means that HPs can be nearly carbon neutral for a full sustainable future. The proper selection of the heat source and the correct design of the heat exchangers is crucial for attaining high HP efficiencies. Heat exchangers (also in terms of HP control strategies) are hence one of the main elements of HPs, and improving their performance enhances the effectiveness of the whole system. Both the heat transfer and pressure drop have to be taken into account for the correct sizing, especially in the case of mini- and micro-geometries, for which traditional models and correlations can not be applied. New models and measurements are required for best HPs system design, including optimization strategies for energy exploitation, temperature control, and mechanical reliability. Thus, a multidisciplinary approach of the analysis is requested and become the future challenge.
Book Synopsis Advances in Ground-Source Heat Pump Systems by : Simon Rees
Download or read book Advances in Ground-Source Heat Pump Systems written by Simon Rees and published by Woodhead Publishing. This book was released on 2016-05-13 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Ground-Source Heat Pump Systems relates the latest information on source heat pumps (GSHPs), the types of heating and/or cooling systems that transfer heat from, or to, the ground, or, less commonly, a body of water. As one of the fastest growing renewable energy technologies, they are amongst the most energy efficient systems for space heating, cooling, and hot water production, with significant potential for a reduction in building carbon emissions. The book provides an authoritative overview of developments in closed loop GSHP systems, surface water, open loop systems, and related thermal energy storage systems, addressing the different technologies and component methods of analysis and optimization, among other subjects. Chapters on building integration and hybrid systems complete the volume. Provides the geological aspects and building integration covered together in one convenient volume Includes chapters on hybrid systems Presents carefully selected chapters that cover areas in which there is significant ongoing research Addresses geothermal heat pumps in both heating and cooling modes
Download or read book Solar Energy Update written by and published by . This book was released on 1982 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solar Energy: Engineering of Solar Energy Systems by : Stanislav Kolisnychenko
Download or read book Solar Energy: Engineering of Solar Energy Systems written by Stanislav Kolisnychenko and published by Trans Tech Publications Ltd. This book was released on 2015-07-31 with total page 4628 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main advantages of solar energy are inexhaustibility and wide accessibility, as well as the relative environmental friendliness of its transformation into other forms of energy. The widespread use of solar energy requires the creation of functionally complete systems which convert solar energy into an element of a given technological process. The collection Engineering of Solar Energy Systems consists of papers published by Trans Tech Publications Inc. from 2010 to 2014 inclusive and covers a wide range of advanced achievements in the field of creating and designing systems for technological use of solar energy. The compiled scientific papers are presented in eight chapters: Chapter 1: Solar Systems for Heating, Cooling and Ventilation Chapter 2: Solar Energy in Environmental Treatment and Water Desalination Chapter 3: Solar Hydrogen Production Chapter 4: Systems for Electricity Supply Based on Solar Energy Chapter 5: Design of Components and Equipment for Solar Systems Chapter 6: Mechatronics, Control and Automation in Solar Energetics Chapter 7: Integration of Solar Technologies in the Architecture of Buildings Chapter 8: Engineering Management in Solar Energetics, which cover many aspects of scientific and engineering activities.
Book Synopsis Proceedings of 3rd Annual Solar Heating and Cooling Research and Development Branch Contractors' Meeting, September 24-27, 1978, Washington, D,C. by :
Download or read book Proceedings of 3rd Annual Solar Heating and Cooling Research and Development Branch Contractors' Meeting, September 24-27, 1978, Washington, D,C. written by and published by . This book was released on 1979 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Systems Simulation and Economic Analysis by :
Download or read book Systems Simulation and Economic Analysis written by and published by . This book was released on 1980 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1992 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Heat Pump-Assisted Drying Technology by : Vasile Minea
Download or read book Advances in Heat Pump-Assisted Drying Technology written by Vasile Minea and published by CRC Press. This book was released on 2016-09-15 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drying of solids is one of the most common, complex, and energy-intensive industrial processes. Conventional dryers offer limited opportunities to increase energy efficiency. Heat pump dryers are more energy and cost effective, as they can recycle drying thermal energy and reduce CO2, particulate, and VOC emissions due to drying. This book provides an introduction to the technology and current best practices and aims to increase the successful industrial implementation of heat pump- assisted dryers. It enables the reader to engage confidently with the technology and provides a wealth of information on theories, current practices, and future directions of the technology. It emphasizes several new design concepts and operating and control strategies, which can be applied to improve the economic and environmental efficiency of the drying process. It answers questions about risks, advantages vs. disadvantages, and impediments and offers solutions to current problems. Discusses heat pump technology in general and its present and future challenges. Describes interesting and promising innovations in drying food, agricultural, and wood products with various heat pump technologies. Treats several technical aspects, from modeling and simulation of drying processes to industrial applications. Emphasizes new design concepts and operating and control strategies to improve the efficiency of the drying process.
Book Synopsis Report to the United States Department of Energy, Conservation and Solar Applications, Solar Heating and Cooling Systems Development Branch, on Simulation and Design of Solar Thermal Processes by : University of Wisconsin--Madison. Solar Energy Laboratory
Download or read book Report to the United States Department of Energy, Conservation and Solar Applications, Solar Heating and Cooling Systems Development Branch, on Simulation and Design of Solar Thermal Processes written by University of Wisconsin--Madison. Solar Energy Laboratory and published by . This book was released on 1978 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of Annual Solar Heating and Cooling Research and Development Branch Contractors' Meeting by :
Download or read book Proceedings of Annual Solar Heating and Cooling Research and Development Branch Contractors' Meeting written by and published by . This book was released on 1979 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019) by : Zhaojun Wang
Download or read book Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019) written by Zhaojun Wang and published by Springer Nature. This book was released on 2020-03-19 with total page 1492 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected papers from the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019), with a focus on HVAC techniques for improving indoor environment quality and the energy efficiency of heating and cooling systems. Presenting inspiration for implementing more efficient and safer HVAC systems, the book is a valuable resource for academic researchers, engineers in industry, and government regulators.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Pumps written by Walter Grassi and published by Springer. This book was released on 2017-08-11 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The text describes the main features of currently available heat pumps, focusing on system operation and interactions with external heat sources. In fact, before choosing a heat pump, several aspects must be assessed in detail: the actual climate of the installation site, the building’s energy requirements, the heating system, the type of operation etc. After discussing the general working principles, the book describes the main components of compression machines – for EHPs, GHPs and CO2 heat pumps. It then addresses absorption heat pumps and provides additional details on the behavior of two-fluid mixtures. The book presents a performance comparison for the different types, helping designers choose the right one for their needs, and discusses the main refrigerants. Notes on helpful additional literature, websites and videos, also concerning relevant European regulations, round out the coverage. This book will be of interest to all engineers and technicians whose work involves heat pumps. It will also benefit students in energy engineering degree programs who want to deepen their understanding of heat pumps.
Book Synopsis Energy Abstracts for Policy Analysis by :
Download or read book Energy Abstracts for Policy Analysis written by and published by . This book was released on 1977 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geothermal Energy Utilization and Technologies 2020 by : Carlo Roselli
Download or read book Geothermal Energy Utilization and Technologies 2020 written by Carlo Roselli and published by MDPI. This book was released on 2021-08-31 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rising pollution, climate change and the depletion of fossil fuels are leading many countries to focus on renewable-based energy conversion systems. In particular, recently introduced energy policies are giving high priority to increasing the use of renewable energy sources, the improvement of energy systems’ security, the minimization of greenhouse gas effect, and social and economic cohesion. Renewable energies’ availability varies during the day and the seasons and so their use must be accurately predicted in conjunction with the management strategies based on load shifting and energy storage. Thus, in order to reduce the criticalities of this uncertainty, the exploitation of more flexible and stable renewable energies, such as the geothermal one, is necessary. Geothermal energy is an abundant renewable source with significant potential in direct use applications, such as in district heating systems, in indirect use ones to produce electricity, and in cogeneration and polygeneration systems for the combined production of power, heating, and cooling energy. This Special Issue includes geothermal energy utilization and the technologies used for its exploitation considering both the direct and indirect use applications.
