Download or read book The Investigation and Optimization of a Two Heat Pump System Incorporating Thermal Storage for Shaping Residential Heating Load written by and published by . This book was released on 2016 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portland General Electric has proposed coupling one or more water tanks with two heat pumps in order to perform load-shifting in residential customer heating and cooling applications. By using the water tanks as a thermal storage unit, this project attempts to partially decouple energy consumption from generation to provide peak demand reduction and to better facilitate the integration of variable renewable energy resources. A scoping study was performed to evaluate the potential impact of this project if implemented in single family homes in Portland, Oregon. This study revealed that the system could provide meaningful savings in the cost of electricity to both the customer and utility. Additionally, an optimization algorithm was developed to dictate system operation and to maximize gains to the utility. Evolutionary algorithms were explored in an attempt to increase the effectiveness of the algorithm's search in limited computation time. Ultimately, an evolution strategy was selected as the most suitable based on tests run in winter and spring months. A genetic algorithm was then developed to handle fixed-speed heat pump operation for compatibility with an alpha-system prototype that has been developed by the research team.
Download or read book A Thermochemical Heat Storage System for Households written by Armand Fopah Lele and published by Springer. This book was released on 2016-07-09 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book offers a comprehensive report on the design and optimization of a thermochemical heat storage system for use in buildings. It combines theoretical and experimental work, with a special emphasis on model-based methods. It describes the numerical modeling of the heat exchanger, which allows recovery of about two thirds of the waste heat from both solar and thermal energy. The book also provides readers with a snapshot of current research on thermochemical storage systems, and an in-depth review of the most important concepts and methods in thermal management modeling. It represents a valuable resource for students, engineers and researchers interested in thermal energy storage processes, as well as for those dealing with modeling and 3D simulations in the field of energy and process engineering.
Download or read book Advances in Thermal Energy Storage Systems written by Luisa F. Cabeza and published by Elsevier. This book was released on 2014-10-31 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal energy storage (TES) technologies store thermal energy (both heat and cold) for later use as required, rather than at the time of production. They are therefore important counterparts to various intermittent renewable energy generation methods and also provide a way of valorising waste process heat and reducing the energy demand of buildings. This book provides an authoritative overview of this key area. Part one reviews sensible heat storage technologies. Part two covers latent and thermochemical heat storage respectively. The final section addresses applications in heating and energy systems. - Reviews sensible heat storage technologies, including the use of water, molten salts, concrete and boreholes - Describes latent heat storage systems and thermochemical heat storage - Includes information on the monitoring and control of thermal energy storage systems, and considers their applications in residential buildings, power plants and industry
Download or read book Assessment of Energy Storage Technologies and Systems written by Argonne National Laboratory. Energy and Environmental Systems Division. Special Projects Group and published by . This book was released on 1978 with total page 42 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 1988 with total page 1550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Analysis and Optimization of a Dual Tank Solar assisted Heat Pump System written by Carsen Jeffrey Banister and published by . This book was released on 2015 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work investigates the performance of a dual tank solar-assisted heat pump (SAHP) system. These systems combine solar thermal collectors (STCs) and a heat pump (HP) into a hybrid system to meet building thermal loads. The main goals of a system of this type are to reduce energy consumption and provide a method to deliver thermal energy with sustainable sources. This research project undertook the design, testing, model creation and tuning, performance evaluation, and optimization of a dual tank SAHP system for domestic hot water (DHW). The novel SAHP configuration developed uses a second thermal storage tank to create more modes of operation with the intent of decreasing the amount of purchased energy. A key aspect of the work was a test apparatus built at the University of Waterloo (UW) to facilitate equipment testing and mapping, identify operational problems such as HP short-cycling, and tune mode components. Alternatives were modelled in TRNSYS to develop design recommendations and assess economic justification for the dual tank SAHP system. Despite noticeable electricity savings by these systems, an analysis of tolerable capital cost versus electricity cost shows that SAHP systems are not justifiable for single family dwellings at the current time. The impact of electricity time-of-use charges was investigated, which revealed that the DHW, SDHW, and single tank SAHP systems consume a similar amount of electricity during off-peak hours. The performance of the dual tank SAHP system in many global climate types was assessed to identify locations best suited for such a system. Many recommendations are provided to improve economic justification of the system. Overall, the performance benefits of a dual tank SAHP system over the alternatives was demonstrated. Due to the high capital costs of the additional equipment required, economic justification is difficult for a single-family residential application. There are promising applications and system augmentations that should be investigated which can lead to a successful demonstration project of a dual tank solar-assisted heat pump system.
Download or read book Heat Pump Controls to Exploit the Energy Flexibility of Building Thermal Loads written by Thibault Péan and published by Springer Nature. This book was released on 2021-01-04 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes different control strategies adapted to heat pumps, at the purpose of increasing energy flexibility in buildings. It reports on the development of both simple rule-based controls (RBC) and advanced model predictive controls (MPC). These are tested and compared in both simulation and experimental setups. The book analyzes in detail all the different steps, including the development and tuning of the controllers, their testing in experimental settings and simulation studies. Bridging between advanced control systems theory concepts and practical needs, and discussing the advantages and main challenges of MPC and RBC controllers in terms of efficiency of heat pump operation, electricity prices, emission values, and users’ comfort, this book offers an in-depth evaluation of innovative control strategies applied to energy demand management in buildings.
Download or read book Summary Report on Methods of Heat Storage for the Heat Pump to Joint AEIC EEI Heat Pump Committee September 30 1958 written by Battelle Memorial Institute and published by . This book was released on 1958 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Performance of a Residential Air to air Heat Pump written by George E. Kelly and published by . This book was released on 1977 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Recovery with Commercial Institutional and Industrial Heat Pumps written by Vasile Minea and published by CRC Press. This book was released on 2024-06-03 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat Recovery with Commercial, Institutional, and Industrial Heat Pumps presents the basic concepts and thermodynamic behavior of mechanical vapor compression and recompression. It covers both ammonia water absorption and compression/resorption heat pumps. Including theoretical and practical approaches, the book features numerous solved exercises based on real thermodynamic and climatic parameters and case studies with takeaways from on-site experiences to help the reader better identify the advantages and limitations of each heat pumping technology. The book discusses future implementations of heat recovery heat pump technologies that are among the most energy-efficient and environmentally friendly techniques. This book will interest graduate students studying HVAC, thermal systems, and heat pumps. It will also benefit professionals working with heat pumps, industrial process engineers, manufacturers, and research and design personnel.
Download or read book Masters Abstracts International written by and published by . This book was released on 1996 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar and Heat Pump Systems for Residential Buildings written by Jean-Christophe Hadorn and published by John Wiley & Sons. This book was released on 2015-06-30 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die Kombination von Wärmepumpen und Solarthermie ist eine relativ neue Entwicklung und hat großes Potenzial, die Energieeffizienz von Heizungs- und Warmwasseranlagen wesentlich zu erhöhen. Damit kann die Gesamtenergiebilanz eines Gebäudes entscheidend verbessert werden. Das Buch ist ein Leitfaden für Entwurf, Simulation, Monitoring und Evaluation von Systemen aus Wärmepumpen und Solarthermie. Verschiedene Systeme werden verglichen und hinsichtlich ihrer Leistungsfähigkeit analysiert. Ergebnisse von Simulationen und Labortests werden ebenso beschrieben wie die Erfahrungen aus gebauten Projekten. Somit ermöglicht es dem Leser, entsprechend der jeweiligen Randbedingungen seines Projektes das effizienteste System zu entwerfen. Dieses Buch ist das erste, das sich eingehend mit dieser Kombination von Komponenten befasst und präsentiert den aktuellen Stand der Technik in diesem Bereich. Es basiert auf einem vierjährigen gemeinsamen Forschungsprojekt zweier Programme der Internationalen Energieagentur: 'Solar Heating and Cooling' (SHC) und 'Heat Pump'. Mehr als 50 renommierte Experten aus 13 Ländern waren an dem Projekt beteiligt.
Download or read book Heat Pump Systems with Vertical Ground Heat Exchanger and Uncovered Solar Thermal Collectors written by Bertram, Erik and published by MV-Verlag. This book was released on 2015 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Phase Change Thermal Storage Device in a Heat Pump for Building Electric Peak Load Shaving Preprint written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Replacing carbon-intensive fossil fuel heating systems with electric heat pumps powered by renewables is a promising approach to decarbonize the building sector. However, one of the technical barriers of this approach is the large scale of heat demand, which will put excessive stress on the electricity grid. Integrating thermal energy storage (TES) into the heating systems can help alleviate this problem, by shifting thermal load and thus shaving peaks in the building electric load. Therefore, it is critical to understand how to design a thermal storage device in a heat pump for peak load shaving. In this study, we developed a numerical model for a cascaded vapor compression heat pump system integrating a phase change thermal storage device. This novel system can control the net thermal charging and discharging rate of the TES independently from the building's thermal load, which allows for precise control of electric power use. In the current study, we controlled the system to shave building electric peak load during a cold winter morning, and to charge TES during the relatively warm afternoon while still providing space heating. We used the model to evaluate the system performance with and without peak shaving. We also investigated the effect of PCM transition Tt on the peak reduction and electric energy saving potentials. The results show that peak shaving scheme effectively reduces the peak electric power consumption during a predefined discharge time window. When comparing to the no shaving case, for PCM Tt = 10 degrees C, the peak electric load reduction is 23.5%. When comparing to an air-source heat pump with back up electric heater, as Tt increases from 0 to 20 degrees C, the peak reduction increases from 46.1% to 50.9%. Integrating PCM Tt = 10 degrees C with peak shaving leads to the 45.5% of electric energy saving, which is the highest among the three transition temperatures.
Download or read book Performance of a Hybrid HVAC integrated Thermal Storage Device written by Allison Mahvi and published by . This book was released on 2021 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Optimal Heating and Cooling System in Residential Buildings written by Angela Bolling and published by . This book was released on 2007 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to rising interests of utilizing energy more efficiently, new ways of maximizing the efficiency in heating and cooling systems are being explored. Although natural gas furnaces and central air conditioners are the most common heating and cooling systems used, geothermal heat pumps are also being used more. There are also two new technologies that use solar energy as the primary source of energy to power these heating and cooling systems. One system is an absorption air conditioner unit that uses direct solar heating, and the other is called a thermally driven heat pump. There are several computer programs that simulate the two common systems; however, there are no known programs that calculate the energy and cost during operation for the systems that use solar energy.
Download or read book Residential Variable Capacity Heat Pumps Sized to Heating Loads written by and published by . This book was released on 2014 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Variable capacity heat pumps are an emerging technology offering significant energy savings potential and improved efficiency. With conventional single-speed systems, it is important to appropriately size heat pumps for the cooling load as over-sizing would result in cycling and insufficient latent capacity required for humidity control. These appropriately sized systems are often under-sized for the heating load and require inefficient supplemental electric resistance heat to meet the heating demand. Variable capacity heat pumps address these shortcomings by providing an opportunity to intentionally size systems for the dominant heating season load without adverse effects of cycling or insufficient dehumidification in the cooling season. This intentionally-sized system could result in significant energy savings in the heating season, as the need for inefficient supplemental electric resistance heat is drastically reduced. This is a continuation of a study evaluating the energy consumption of variable capacity heat pumps installed in two unoccupied research homes in Farragut, a suburb of Knoxville, Tennessee. In this particular study, space conditioning systems are intentionally sized for the heating season loads to provide an opportunity to understand and evaluate the impact this would have on electric resistance heat use and dehumidification. The results and conclusions drawn through this research are valid and specific for portions of the Southeastern and Midwestern United States falling in the mixed-humid climate zone. While other regions in the U.S. do not experience this type of climate, this work provides a basis for, and can help understand the implications of other climate zones on residential space conditioning energy consumption. The data presented here will provide a framework for fine tuning residential building EnergyPlus models that are being developed.
