Download PDF An Introduction to Mechanical Engineering Part 1 by Michael Clifford
Sinopsis
Engineering is not merely knowing and being knowledgeable, like a walking encyclopaedia; engineering is not merely analysis; engineering is not merely the possession of the capacity to get elegant solutions to non-existent engineering problems; engineering is practicing the art of the organized forcing of technological change.
Dean Gordon Brown
This book is written for undergraduate engineers and those who teach them. It contains concise chapters on solid mechanics, materials, fluid mechanics, thermodynamics, electronics and dynamics, which provide grounding in the fundamentals of mechanical engineering science.An introduction to mathematics is covered in the companion publication, An Introduction to Mathematics for Engineers by Stephen Lee, also published by Hodder Education. The material in this book is supported by an accompanying website: www.hodderplus.co.uk/mechanicalengineering. The authors have over 120 years' experience of teaching undergraduate engineers between them, mostly, but not exclusively, at the University of Nottingham.The material contained within this textbook has been derived from lecture notes, research findings and personal experience from within the lecture theatre and tutorial sessions. We gratefully acknowledge the support, encouragement and occasional gentle prod from Stephen Halder and Gemma Parsons at Hodder
Content
- Solid mechanics
- Materials and processing
- Fluid dynamics
- Thermodynamics
- Electrical and electronic systems
- Machine dynamics
Download PDF TIME AND CHANCE by DAVID Z ALBERT
Sinopsis
What I want to talk about here is a certain tension between fundamental microscopic physical theory and everyday macroscopic human experience, a tension that comes up (more particularly) in connection with the question of precisely how the past is different from the future.
And the fundamental theory in which it will work best to start that talk out, the fundamental theory (that is) in which this tension is at its purest and most straightforward, is the mechanics of Newton. Never mind (for the moment) that the mechanics of Newton turns out not to be the mechanics of the actual world.1 We’ll talk about that later.
▲▲▲ According to Newtonian mechanics, or at any rate according to the particularly clean and simple version of it that I want to start off with here, the physical furniture of the universe consists entirely of point particles. The only dynamical variables of such particles—the only physical attributes of such particles that can change with time—are (on this theory) their positions; and (consequently) a list of what particles exist, and of what sorts of particles they are,2 and of what their positions are at all times, is a list of absolutely everything there is to say about the physical history of the world.3
Content
- Time-Reversal Invariance
- Thermodynamics
- Statistical Mechanics
- The Reversibility Objections and the Past-Hypothesis
- The Scope of Thermodynamics
- The Asymmetries of Knowledge and Intervention
- Quantum Mechanics
Download PDF THERMODYNAMICS AND HEAT POWERED CYCLES: A COGNITIVE ENGINEERING APPROACH by Chih Wu
Sinopsis
The field of science dealing with the relationships of heat, work, and properties of systems is called thermodynamics. A macroscopic approach to the study of thermodynamics is called classical thermodynamics. In engineering fields, a substance is considered to be in continuum, that is, it is continuously distributed throughout. The facts that matter is made up of molecules and that the molecules have motions are completely ignored. When a system is subjected to transfer of energy or other thermodynamic processes, attention is focused on the behavior of the system as a whole. This approach is mathematically rather simple, and allows engineers to easily describe a system using only a few properties. Engineering thermodynamics is based on this macroscopic point of view. If the continuum assumption is not valid, a statistical method based on microscopic molecular activity may be used to describe a system. The microscopic approach inquires into the motion of molecules, assumes certain mathematical models for the molecular behavior, and draws conclusions regarding the behavior of a system. Such a microscopic approach to the study of thermodynamics is called statistical thermodynamics. The microscopic approach is mathematically complex. Fortunately, the microscopic aspects are not essential in most of the important technical applications. We can obtain excellent engineering solutions using the simpler macroscopic ideas. Therefore, we shall use the macroscopic approach in this text.
Thermodynamics is studied by physicists, chemists, and engineers. Physicists and chemists are concerned with basic laws, properties of substances, and changes in the properties caused by the interaction of different forms of energy. Engineers are interested not only in all these aspects, but also in the application of thermodynamic principles to the design of machines that will convert energy from one form into another. Mechanical engineers are frequently concerned with the design of a system that will most efficiently convert thermalenergy into mechanical energy, or vice versa.
Content
- Basic Concepts
- Properties of Thermodynamic Substances
- First Law of Thermodynamics for Closed Systems
- First Law of Thermodynamics for Open Systems
- Second Law of Thermodynamics
- Entropy
- Exergy and Irreversibility
- Vapor Cycles
- Gas Closed System Cycles
- Gas Open System Cycles
- Combined Cycle and Co-Generation
- Refrigeration and Heat Pump Cycles
- Finite-Time Thermodynamics
Download PDF Applied Thermodynamics Third Edition by Onkar Singh
Sinopsis
Thermodynamics is a branch of science which deals with energy. Engineering thermodynamics is modified name of this science when applied to design and analysis of various energy conversion systems. Thermodynamics has basically a few fundamental laws and principles applied to a wide range of problems. Thermodynamics is core to engineering and allows understanding of the mechanism of energy conversion. It is really very difficult to identify any area where there is no interaction in terms of energy and matter. It is a science having its relevance in every walk of life. Thermodynamics can be classified as ‘Classical thermodynamics’ and ‘Statistical thermodynamics’. Here in engineering systems analysis the classical thermodynamics is employed.
“Thermodynamics is the branch of physical science that deals with the various phenomena of energy and related properties of matter, especially of the laws of transformations of heat into other forms of energy and vice-versa.”
Internal combustion engines employed in automobiles are a good example of the energy conversion equipments where fuel is being burnt inside the piston cylinder arrangement and chemical energy liberated by the fuel is used for getting the shaft work from crankshaft. Thermodynamics lets one know the answer for the questions as, what shall be the amount of work available from engine?, what shall be the efficiency of engine?, etc.
For analysing any system there are basically two approaches available in engineering thermodynamics. Approach of thermodynamic analysis means how the analyser considers the system. Macroscopic approach is the one in which complete system as a whole is considered and studied without caring for what is there constituting the system at microscopic level.
Contrary to this the microscopic approach is one having fragmented the system under consideration up to microscopic level and analysing the different constituent subsystems/microsystems. In this approach study is made at the microscopic level. For studying the system the microlevel studies are put together to see the influences on overall system. Thus, the statistical techniques are used for integrating the studies made at microscopic level. This is how the studies are taken up in statistical thermodynamics. In general it can be said that, Macroscopic approach analysis = Σ (Microscopic approach analysis).
Content
- Fundamental Concepts and Definitions
- Zeroth Law of Thermodynamics
- First Law of Thermodynamics
- Second Law of Thermodynamics
- Entropy
- Thermodynamic Properties of Pure Substance
- Availability and General Thermodynamic Relations
- Vapour Power Cycles
- Gas Power Cycles
- Fuel and Combustion
- Boilers and Boiler Calculations
- Steam Engine
- Nozzles
- Steam Turbines
- Steam Condensor
- Reciprocating and Rotary Compressor
- Introduction to Internal Combustion Engines
- Introduction to Refrigeration and Air Conditioning
- Jet Propulsion and Rocket Engines
Download PDF ENGINEERING THERMODYNAMICS by R. K. Rajput
Sinopsis
Coal and Ash Circuit. Coal arrives at the storage yard and after necessary handling, passes on to the furnaces through the fuel feeding device. Ash resulting from combustion of coal collects at the back of the boiler and is removed to the ash storage yard through ash handling equipment.
Air and Gas Circuit. Air is taken in from atmosphere through the action of a forced or induced draught fan and passes on to the furnace through the air preheater, where it has been heated by the heat of flue gases which pass to the chimney via the preheater. The flue gases after passing around boiler tubes and superheater tubes in the furnace pass through a dust catching device or precipitator, then through the economiser, and finally through the air preheater beforebeing exhausted to the atmosphere.
Feed Water and Steam Flow Circuit. In the water and steam circuit condensate leaving the condenser is first heated in a closed feed water heater through extracted steam from the lowest pressure extraction point of the turbine. It then passes through the deaerator and a few more water heaters before going into the boiler through economiser.
In the boiler drum and tubes, water circulates due to the difference between the density of water in the lower temperature and the higher temperature sections of the boiler. Wet steam from the drum is further heated up in the superheater for being supplied to the primemover. After expanding in high pressure turbine steam is taken to the reheat boiler and brought to its original dryness or superheat before being passed on to the low pressure turbine. From there it is exhausted through the condenser into the hot well. The condensate is heated in the feed heaters using the steam trapped (blow steam) from different points of turbine.
Content
- INTRODUCTION—OUTLINE OF SOME DESCRIPTIVE SYSTEMS
- BASIC CONCEPTS OF THERMODYNAMICS
- PROPERTIES OF PURE SUBSTANCES
- FIRST LAW OF THERMODYNAMICS
- SECOND LAW OF THERMODYNAMICS AND ENTROPY
- AVAILABILITY AND IRREVERSIBILITY
- THERMODYNAMIC RELATIONS
- IDEAL AND REAL GASES
- GASES AND VAPOUR MIXTURES
- PSYCHROMETRICS
- CHEMICAL THERMODYNAMICS
- VAPOUR POWER CYCLES
- GAS POWER CYCLES
- REFRIGERATION CYCLES
- HEAT TRANSFER
- COMPRESSIBLE FLOW
Download PDF ENGINEERING THERMODYNAMICS Third Edition by R.K. RAJPUT
Sinopsis
From the scientific point of view division of SI units into these classes is to a certain extent arbitrary, because it is not essential to the physics of the subject. Nevertheless the General Conference, considering the advantages of a single, practical, world-wide system for international relations, for teaching and for scientific work, decided to base the international system on a choice of six well-defined units.
Content
- INTRODUCTION—OUTLINE OF SOME DESCRIPTIVE SYSTEMS
- BASIC CONCEPTS OF THERMODYNAMICS
- PROPERTIES OF PURE SUBSTANCES
- FIRST LAW OF THERMODYNAMICS
- SECOND LAW OF THERMODYNAMICS AND ENTROPY
- AVAILABILITY AND IRREVERSIBILITY
- THERMODYNAMIC RELATIONS
- IDEAL AND REAL GASES
- GASES AND VAPOUR MIXTURES
- PSYCHROMETRICS
- CHEMICAL THERMODYNAMICS
- VAPOUR POWER CYCLES
- GAS POWER CYCLES
- REFRIGERATION CYCLES
- HEAT TRANSFER
- COMPRESSIBLE FLOW
