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Author: Abdallah Ali Publisher: ISBN: Category : Languages : en Pages : 121
Book Description
The current research paper presents the experimental findings following exhaust runner heat exchanger tests as well as a realistic theoretical proof of concept for steam turbocharging by using said results. A preliminary heat analysis was completed in order to first assess the magnitude of recoverable energy from the spent exhaust gases. Through experimentation, actual heat absorbed by the water was successfully obtained and was higher than predicted. The proof of concept was then completed by inputting the experimental engine parameters into a turbocharged Otto cycle combined to a Rankine cycle using experimental figures for the heat input stages of the assessment. The theory ultimately resulted in peak improvements of 7.446% in engine thermal efficiency and an interesting reduction in brake specific fuel consumption of 6.930% near 2500 RPM. Furthermore, through the use of steam turbocharging, brake engine power can theoretically be improved by 35.00%, resulting in a 13.73% increase in the current experimental engine’s power density. The test engine was mounted onto a hydraulic engine dyno and a baseline of its power and torque output was recorded for final confirmation that the heat recuperated via this energy recovery system was not being negated elsewhere in the combined cycle. Finally, a preliminary steam turbine was designed and the optimal system configuration was presented for future use. The obtained results clearly demonstrate that steam turbocharging is a novel energy recovery system with great potential.
Author: Abdallah Ali Publisher: ISBN: Category : Languages : en Pages : 121
Book Description
The current research paper presents the experimental findings following exhaust runner heat exchanger tests as well as a realistic theoretical proof of concept for steam turbocharging by using said results. A preliminary heat analysis was completed in order to first assess the magnitude of recoverable energy from the spent exhaust gases. Through experimentation, actual heat absorbed by the water was successfully obtained and was higher than predicted. The proof of concept was then completed by inputting the experimental engine parameters into a turbocharged Otto cycle combined to a Rankine cycle using experimental figures for the heat input stages of the assessment. The theory ultimately resulted in peak improvements of 7.446% in engine thermal efficiency and an interesting reduction in brake specific fuel consumption of 6.930% near 2500 RPM. Furthermore, through the use of steam turbocharging, brake engine power can theoretically be improved by 35.00%, resulting in a 13.73% increase in the current experimental engine’s power density. The test engine was mounted onto a hydraulic engine dyno and a baseline of its power and torque output was recorded for final confirmation that the heat recuperated via this energy recovery system was not being negated elsewhere in the combined cycle. Finally, a preliminary steam turbine was designed and the optimal system configuration was presented for future use. The obtained results clearly demonstrate that steam turbocharging is a novel energy recovery system with great potential.
Author: M. Anusha Wijewardane Publisher: ISBN: Category : Languages : en Pages :
Book Description
Today, the investigation of fuel economy improvements in internal combustion engines (ICEs) has become the most significant research interest among the automobile manufacturers and researchers. The scarcity of natural resources, progressively increasing oil prices, carbon dioxide taxation and stringent emission regulations all make fuel economy research relevant and compelling. The enhancement of engine performance solely using incylinder techniques is proving increasingly difficult and as a consequence the concept of exhaust energy recovery has emerged as an area of considerable interest. Three main energy recovery systems have been identified that are at various stages of investigation. Vapour power bottoming cycles and turbo-compounding devices have already been applied in commercially available marine engines and automobiles. Although the fuel economy benefits are substantial, system design implications have limited their adaptation due to the additional components and the complexity of the resulting system. In this context, thermo-electric (TE) generation systems, though still in their infancy for vehicle applications have been identified as attractive, promising and solid state candidates of low complexity. The performance of these devices is limited to the relative infancy of materials investigations and module architectures. There is great potential to be explored. The initial modelling work reported in this study shows that with current materials and construction technology, thermo-electric devices could be produced to displace the alternator of the light duty vehicles, providing the fuel economy benefits of 3.9%-4.7% for passenger cars and 7.4% for passenger buses. More efficient thermo-electric materials could increase the fuel economy significantly resulting in a substantially improved business case. The dynamic behaviour of the thermo-electric generator (TEG) applied in both, main exhaust gas stream and exhaust gas recirculation (EGR) path of light duty and heavy duty engines were studied through a series of experimental and modelling programs. The analyses of the thermo-electric generation systems have highlighted the need for advanced heat exchanger design as well as the improved materials to enhance the performance of these systems. These research requirements led to the need for a systems evaluation technique typified by hardware-in-the-loop (HIL) testing method to evaluate heat exchange and materials options. HIL methods have been used during this study to estimate both the output power and the exhaust back pressure created by the device. The work has established the feasibility of a new approach to heat exchange devices for thermo-electric systems. Based on design projections and the predicted performance of new materials, the potential to match the performance of established heat recovery methods has been demonstrated.
Author: Apostolos Pesiridis Publisher: Nova Science Pub Incorporated ISBN: 9781633214934 Category : Science Languages : en Pages : 269
Book Description
Concerns for fuel economy and reduced emissions have turned the attention of automotive internal combustion engine manufacturers to the exhaust system and towards technological system development to account for the significant levels of potential energy that can be recovered. The present volume on Automotive Exhaust Emissions and Energy Recovery for both gasoline and diesel engines is therefore both timely and appropriate. Whereas diesel engines have been predominantly turbocharged, only a relatively small percentage of gasoline engines are similarly equipped, which has led to significant efforts by engine manufacturers in recent years to downsize and down-speed these engines. On the other hand, the relative focus in diesel engine development in terms of emissions and exhaust energy recovery has shifted toward devices other than the turbocharger for enhanced energy recovery and emissions control technologies in order to allow the diesel engines of the future to keep up with the dual-demand for very low emissions and increasing levels of fuel economy. The book focuses on the exhaust system and the technologies and methods used to reduce emissions and increase fuel economy by capitalising on the exhaust gas energy availability (either in the form of gas kinetic energy or as waste heat extracted from the exhaust gas). It is projected that in the short to medium term, advances in exhaust emissions and energy recovery technologies will lead the way in internal combustion engine development and pave the way towards increasing levels of engine hybridisation until fully electric vehicle technology can claim a level of maturity and corresponding market shares to turn the bulk of this focus away from the internal combustion engine. This book is aimed at engine research professionals in the industry and academia, but also towards students of powertrain engineering. The collection of articles in this book reviews the fundamentals of relevance, recent exhaust system technologies, details recent or on-going projects and uncovers future research directions and potentials.
Author: Jignesh R. Mehta Publisher: LAP Lambert Academic Publishing ISBN: 9783659576782 Category : Languages : en Pages : 76
Book Description
Energy conservation is equivalent to energy generation and transmission at 100% efficiency. Combined heat and power (CHP) is an important concept as fuel is used to generate two different forms of energy simultaneously. This book reports a project done at a bottle-cap manufacturing company, where a diesel generating set is employed as backup source of electrical energy. The possibility of using heat from exhaust gases to heat thermic fluid is explored. The design process for the heat recovery heat exchanger and other components is presented. The hot thermic fluid can be used for process heating for making the bottle-caps. It is estimated that around 50 kW heat can be recovered using a shell and tube heat exchanger for the 125 KVA diesel generator set. The payback period is around 480 days. This work thus demonstrates feasibility of such CHP system for process industries. It would also help people in the trade to design such system and also evaluate them.
Author: Enhua Wang Publisher: BoD – Books on Demand ISBN: 1789843472 Category : Science Languages : en Pages : 202
Book Description
This book on organic Rankine cycle technology presents nine chapters on research activities covering the wide range of current issues on the organic Rankine cycle. The first section deals with working fluid selection and component design. The second section is related to dynamic modeling, starting from internal combustion engines to industrial power plants. The third section discusses industrial applications of waste heat recovery, including internal combustion engines, LNG, and waste water. A comprehensive analysis of the technology and application of organic Rankine cycle systems is beyond the aim of the book. However, the content of this volume can be useful for scientists and students to broaden their knowledge of technologies and applications of organic Rankine cycle systems.
Author: John Kasab Publisher: SAE International ISBN: 0768099560 Category : Technology & Engineering Languages : en Pages : 464
Book Description
The objective of this book is to present a fundamental development of the science and engineering underlying the design of exhaust aftertreatment systems for automotive internal combustion engines. No pre-requisite knowledge of the field is required: our objective is to acquaint the reader, whom we expect to be new to the field of emissions control, with the underlying principles, control methods, common problems, and fuel effects on catalytic exhaust aftertreatment devices. We do this in hope that they can better understand the previous and current generations of emissions control, and improve upon them. This book is designed for the engineer, researcher, designer, student, or any combination of those, who is concerned with the control of automotive exhaust emissions. It includes discussion of theory and fundamentals applicable to hardware development.
Author: Andrea De Pascale Publisher: MDPI ISBN: 3039363948 Category : Technology & Engineering Languages : en Pages : 192
Book Description
The rising trend in the global energy demand poses new challenges to humankind. The energy and mechanical engineering sectors are called to develop new and more environmentally friendly solutions to harvest residual energy from primary production processes. The Organic Rankine Cycle (ORC) is an emerging energy system for power production and waste heat recovery. In the near future, this technology can play an increasing role within the energy generation sectors and can help achieve the carbon footprint reduction targets of many industrial processes and human activities. This Special Issue focuses on selected research and application cases of ORC-based waste heat recovery solutions. Topics included in this publication cover the following aspects: performance modeling and optimization of ORC systems based on pure and zeotropic mixture working fluids; applications of waste heat recovery via ORC to gas turbines and reciprocating engines; optimal sizing and operation of ORC under combined heat and power and district heating application; the potential of ORC on board ships and related issues; life cycle analysis for biomass application; ORC integration with supercritical CO2 cycle; and the proper design of the main ORC components, including fluid dynamics issues. The current state of the art is considered and some cutting-edge ORC technology research activities are examined in this book.
Author: Andrea Gil Arbues Publisher: ISBN: Category : Languages : en Pages :
Book Description
Also in modern combustion engines, the maximal energetic efficiency is lower than 45%, which means that 55% of the supplied energy is lost and released to the environment. Automobile manufacturers and R&D partner suppliers are taking a special concern in investigating heat energy from exhaust gases, with the aim of recovering part of the heat by means of a Rankine Process and using it for energy cogeneration in the automobile. In the context of this Master Thesis, a new calculation software of the different thermodynamic states of the waste heat recovery system has to be programmed and used together with the rest of the available calculation tools. Another objective of this Master Thesis is the set up of valid simulation models for the different components of the heat recovery system based on measured testing data. This technical conditions and on the other hand the cycle requirements with the final objective of finding optimized states for each component. Finally, in order to reflect the behaviour of the system as a whole, the integration of the different simulated components of the waste heat recovery model would come in very useful. A complete simulation of the system would enable the estimation of optimization issues of the different parameters and operating points of the cycle.
Author: Abdallah Ali
Author: Abdallah Ali
Author: M. Anusha Wijewardane
Author: Nikolaos Papadopoulos (M.E.)
Author: Apostolos Pesiridis
Author: Nikolaos Papadopoulos
Author: Jignesh R. Mehta
Author: Enhua Wang
Author: John Kasab
Author: Andrea De Pascale
Author: Andrea Gil Arbues