Download or read book Simulation Models for Improved Water Heating Systems written by and published by . This book was released on 2013 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research improved the design of computer simulation models of water heaters and hot water distribution systems to increase their accuracy and flexibility, and to allow for future inclusion of new technologies. The models will be incorporated into the Buildings Library at Lawrence Berkeley National Laboratory to assist those performing whole-building energy simulations.
Download or read book Simulation Models for Improved Water Heating Systems written by Jim Lutz and published by . This book was released on 2013 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Simulation of Solar Water Heating System with Thermal Storage written by Ahmed Mohamed Aisa and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increase in electricity prices and environmental concerns, new technologies are being developed to extract energy from every available source and store the excess energy generated for later usage. One such solution is provided by Thermal Energy Storage Systems. Solar radiation in summer can be stored inter-seasonally to provide heating in winter, while the cold from winter air can be used to run air conditioning in summer. This thesis studies in detail the solar thermal energy storage system used for domestic water heating purposes in a typical detached home in St. John's, Newfoundland, Canada. It introduces the topic, discusses the background and development of the systems, and presents the basic concept of what a solar thermal energy storage system is and how it works. As well, it focuses on the availability of solar radiation, which is important for analyzing how effective the system can be, considering that the amount of solar radiation is not constant throughout the earth. In-depth information on how thermal energy storage system functions and operates, along with an extensive review of the literature, is also featured. Studies including experimental and simulation models are reviewed, which helps to compare earlier approaches to the present handling of the problem. Additionally, to establish the findings of the thesis, a simulation model of solar thermal energy storage for domestic water usage is created with the help of SAM software. Various parameters of MATLAB software are taken into consideration as well to establish the desired design of the system. These design parameters are extensively explained, together with a discussion on the assumptions and design technologies considered for creating the model for the MATLAB and BEopt simulations. Overall, this thesis demonstrates a method of designing a solar water heating system with thermal storage that can provide hot water for a small house. SAM and HOMER, which are design models that calculate the consumption of hot water and cost for a system, are extensively utilized in the study.
Download or read book Modeling Processes and Their Interactions in Cropping Systems written by Lajpat R. Ahuja and published by John Wiley & Sons. This book was released on 2022-08-09 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling Processes and Their Interactions in Cropping Systems A complete discussion of soil-plant-climate-management processes In Modeling Processes and Their Interactions in Cropping Systems: Challenges for the 21st Century, a team of distinguished researchers delivers a comprehensive and up-to-date scientific textbook devoted to teaching the modeling of soil-plant-climate-management processes at the upper undergraduate and graduate levels. The book emphasizes the new opportunities and paradigms available to modern lab and field researchers and aims to improve their understanding and quantification of individual processes and their interactions. The book helps readers quantify field research results in terms of the fundamental theory and concepts broadly generalizable beyond specific sites, as well as predict experimental results from knowledge of the fundamental factors that determine the environment and plant growth in different climates. Readers will also discover: An introduction to water and chemical transport in the soil matrix and macropores Explorations of heat transport, water balance, snowpack, and soil freezing Discussions of merging machine learning with APSIM models to improve the evaluation of the impact of climate extremes on wheat yields in Australia Examinations of the quantification and modeling of management effects on soil properties, including discussions of tillage, reconsolidation, crop residues, and crop management The book will be essential reading for anyone interested in the 2030 breakthroughs in agriculture identified by the National Academies of Sciences, Engineering, and Medicine.
Download or read book Thermal Food Processing written by Da-Wen Sun and published by CRC Press. This book was released on 2012-05-16 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal processing remains one of the most important processes in the food industry. Now in its second edition, Thermal Food Processing: New Technologies and Quality Issues continues to explore the latest developments in the field. Assembling the work of a worldwide panel of experts, this volume highlights topics vital to the food industry today an
Download or read book Modeling and Simulation of Thermal Power Plants with ThermoSysPro written by Baligh El Hefni and published by Springer. This book was released on 2019-01-24 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains the modelling and simulation of thermal power plants, and introduces readers to the equations needed to model a wide range of industrial energy processes. Also featuring a wealth of illustrative, real-world examples, it covers all types of power plants, including nuclear, fossil-fuel, solar and biomass. The book is based on the authors’ expertise and experience in the theory of power plant modelling and simulation, developed over many years of service with EDF. In more than forty examples, they demonstrate the component elements involved in a broad range of energy production systems, with detailed test cases for each chemical, thermodynamic and thermo-hydraulic model. Each of the test cases includes the following information: • component description and parameterization data; • modelling hypotheses and simulation results; • fundamental equations and correlations, with their validity domains; • model validation, and in some cases, experimental validation; and • single-phase flow and two-phase flow modelling equations, which cover all water and steam phases. A practical volume that is intended for a broad readership, from students and researchers, to professional engineers, this book offers the ideal handbook for the modelling and simulation of thermal power plants. It is also a valuable aid in understanding the physical and chemical phenomena that govern the operation of power plants and energy processes.
Download or read book Simulation of Energy Use in Residential Water Heating Systems written by Carolyn Dianarose Schneyer and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Current federal and provincial efficiency standards for residential water heating are based solely on the tested efficiency of individual water heating devices. Additional energy expended or saved as the water cycles through the home is not taken into account. This research, co-funded by British Columbia's Ministry of Energy, Mines and Petroleum Resources (MEMPR), is a first step toward the Province's goal of developing a new energy efficiency standard for water heating systems in new construction. This groundbreaking new standard would employ a?systems? approach, establishing guidelines for new construction based on the total energy used for water heating within the building envelopeThe research team has developed a Simulink computer model which, using a one-minute time-step, simulates 24-hour cycles of water heating in a single-family home. The objectives of this thesis are to use that model to simulate a variety of water heating technology combinations, and to devise methods of utilizing the resulting data to evaluate water heating systems as a whole and to quantify each system's relative energy impact. A metric has been developed to evaluate the efficiency of the system: the system energy factor (SEF) is the ratio of energy used directly to heat water over the amount of energy drawn from conventional fuel sources. The CO2 impact of that energy draw is also considered. Data is generated for cities in three different climates around BC: Kamloops, Victoria and Williams Lake. Electric and gas-fired tank water heaters of various sizes and efficiencies are simulated, along with less traditional energy-saving technologies such as solar-assisted pre-heat and waste water heat recovery components. A total of 7,488 six-day simulations are run, each representing a unique combination of technology, load size, location and season. The resulting data is presented from a variety of angles, including the relative impacts of water heater rating, additional technology type, location and season on the SEF of the system. The interplay between SEF and carbon dioxide production is also examined. These two factors are proposed as the basis for devising performance tiers by which to rank water heating systems. Two proposals are made regarding how these tiers might be organized based on the data presented here, though any tiers will have to be re-evaluated pending data on a wider range of technology combinations. A brief financial analysis is also offered, exploring the potential payback period for various technology combinations in each location. Given current equipment and energy costs, the financial savings garnered by the increase in energy efficiency are not, in most cases, found to be sufficient to justify the expense to the homeowner from a purely fiscal perspective. Additional changes would need to take place to ensure the financial viability of these technologies before large-scale adoption of systems-based standards could be employed.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolutionary Methods Based Modeling and Analysis of Solar Thermal Systems written by Biplab Das and published by Springer Nature. This book was released on 2023-04-29 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents insights into the thermal performance of solar thermal collectors using both computational and experimental modeling. It consists of various computational and experimental case studies conducted by the authors on the solar thermal collector system. The authors begin by developing thermal modeling using a case study that shows the effect of different governing parameters. A few more experimental cases studies follow that highlight the energy, exergy, and environmental performance of the solar thermal collector system and to examine the performance of a modified solar collector system, illustrating performance improvement techniques. Finally, application of different evolutionary optimization techniques such as soft computing and evolutionary methods, like fuzzy techniques, MCDM methods like fuzzy logic based expert system (FLDS), Artificial Neural Network (ANN), Grey relational analysis (GRA), Entropy-Jaya algorithm, Entropy-VIKOR etc. are employed.
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:
Download or read book High Resolution Time series Modeling of Domestic Hot Water Heating Systems written by Bo Li and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis evaluates domestic water heating systems in conjunction with energy saving technologies such as solar water heating, drain water heat recovery, and heat pump water heating. Five dynamic models are developed using Matlab Simulink® with a time-step of one minute. Using minute resolution hot water flow, hourly solar radiation data and ambient temperature, the performance of various configurations are assessed when operating in Victoria, Kamloops, and Williams Lake, B.C. Twelve different demand profiles on a summer day and winter day are simulated. Some specific metrics, such as conventional energy consumption, system energy factor, and equivalent CO2 emissions are used as the basis of evaluating the system efficiency. Results indicate the potential improvements in system performance over a conventional domestic water heating system in lower conventional energy consumption and lower CO2 emissions when applying any one of the three energy saving technologies mentioned above. For example, on a representative summer day (Day 228) in Victoria with a load profile of a low-use two-person family on a weekday, the system's energy factor can be improved from 0.50 to up to2.84, and the corresponding conventional energy consumption and the CO2 emissions decrease from 9.86 kwh to 1.67 kwh, and 1.77 kg/day to 0.06 kg/day, respectively depending on which energy saving technology is applied. The modeling tool developed in this research can be used to guide the design of domestic water heating systems with various system configurations.
Download or read book Solar Water Heating Systems written by H.P. Garg and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: H.P. Garg Centre of Energy Studies Indian Institute of Technology Hauz Khas, New Delhi 110 016 India Heating of water using solar energy is not new and by using a little science and technology in it, the solar energy can be utilized more effectively and economically for heating the water both for domestic and industrial applications. Solar Water Heaters are popular for the last three decades in countries like USA, Australia, Israel, Japan, India. This is the only solar energy application which is commercially, technic ally and economically viable and has been studied for more than 30 years in many countries. Technical advances in solar water heating have been very rapid in the last 30 years. These are becoming popular not only for domestic use but for large establishments like hostels, hotels, hospitals, industries such as Textile, Paper and Food Processing and even in heating of swimming pools in winter. In few instances the cost of solar water heating systems may be higher than those operated by electricity, gas or other fuel but over a period of time this is more than recovered by the savings in the cost of operations and maintenance.
Download or read book Modeling Methods and Practices in Soil and Water Engineering written by Balram Panigrahi and published by CRC Press. This book was released on 2017-03-16 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the development of useful models and their applications in soil and water engineering. It covers various modeling methods, including groundwater recharge estimation, rainfall-runoff modeling using artificial neural networks, development and application of a water balance model and a HYDRUS-2D model for cropped fields, a multi-model approach for stream flow simulation, multi-criteria analysis for construction of groundwater structures in hard rock terrains, hydrologic modeling of watersheds using remote sensing, and GIS and AGNPS.
Download or read book Miscellaneous Publication written by and published by . This book was released on 1981 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Thermodynamic Heating of Water Through Hydraulic Heat Load and Pressure Drop written by Edward Howard Little (III) and published by . This book was released on 2014 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat-loading on working fluids such as those used on Hydraulic and Braking systems have been considered to cause a negative effect due to performance inefficiencies and pressure drops brought on by designed features such as pressure regulators and relief valves. For this type of working systems the negative effect causes toward the working fluid are in the form of heat, which if not properly regulated can cause a degradation to the performance (reduction of working force) of the hydraulic system, as well as the breakdown of the hydraulic fluid, and an increase in the wear to critical components such as seals, bearings (as used in pumps and valves that could lead to premature failure of the hydraulic system. Normally, this heating effect is addressed by the integration of devices such as a heat exchanger or properly sized fluid reservoirs into the hydraulic system. By doing so this effectively dissipates or reduces the amount of thermal energy residing in the heated fluid. Such preventive methods help maintain a sufficient operating temperature range within the system, protecting components. However, what if this negative heating effect that occurs within hydraulics systems could be harnessed, even promoted to produce a positive product in the form of raising the temperature in water such as could used to design an instantaneous hot water heater system? The work laid out in this thesis is intended to evaluate if the use of heat loading in the form of pressure drop and pump inefficiency can be used as a means to intentionally increase the temperature of an incompressible fluid (water, H2O), through mathematical and computation studies. Two mathematical equation models were performed providing initial predictions that a pressure drop of 5000psi will produce about 14-degF of heating to the fluid. Taking these predictions, 3D simulation models were created and were used to validate the mathematical predictions to show that pressure drop of different pressure levels does convert the potential energy in the fluid (in the form of the raised pressure) and converts it to thermal energy (in the form of increase fluid temperatures). The simulation portion on this thesis will show the setup and process for creating each simulation. The process is first started with having models of both pressure relief valves and of an orifice to be created to simulate both direct and hybrid heating of flowing water. Each model is then meshed in to the computational fluid dynamics (CFD) preprocessor, ANSYS FLUENT. After the CFD software setup was configured, each individual model is simulated in FLUENT and the results are compared to determine the most optimized and efficient model for heating water to a specified temperature level. By using two different relief valve designs, it was determined that the pressure drop is the primary contributor to the temperature. By comparing the three types of relief devices, the orifice was determined to provide the most simplest and cost effective design, but also requires that the water flowing through the restriction must be accurately conditioned so that a specific flow rate and inlet pressure is maintained or the output temperature would be negatively affected (lower than predicted temperature). Finally 3D model of inlet tank concepts were analyzed in ANSYS FLUENT to determine that a 7-8-degF increase to inlet water could be provided which could reduce the amount of components required to heat the water to an approximate range of 120-140-degF. Finally, this thesis will provide direction to what further activities would be required to validate both the mathematical and simulated results and provide conceptual design ideas.
Download or read book Solar Energy and Nonfossil Fuel Research written by and published by . This book was released on 1980 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Energy Update written by and published by . This book was released on 1981 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
