Thermodynamics Engineering Assignment Help
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What is Thermodynamics Engineering and What is its Significance?
Before proceeding further, let’s see what the topic is all about in a small gist. The word thermodynamics is derived from the Greek words therme (heat) and dynamis (force). Although various fundamental aspects of thermodynamics have been of interest since many past centuries, the proper study and application of Thermodynamics began in the early nineteenth century through the application of the power of heat: the capacity of hot bodies to generate work. Today the scope is much larger, dealing with energy and relationships among the properties of matter.
Concepts Related to Thermodynamics
But, before we go further there are some concepts related to thermodynamics that forms the basis of this field of engineering.
- System-Â It is a collection of various matters which are within prescribed and identifiable boundaries. A system can be an open or closed which refers to the fact that whether mass transfer does or does not take place across the boundary
- Surroundings- It is restricted to the particles of external matter of the system which may be affected by changes within the system and sometimes the surroundings themselves may form another system.
- Boundary- It is a physical or an imaginary surface which envelopes the system and separates it from the surroundings.
- Property-Â It is any quantity in which changes can be defined only by the end states and by the different processes. Some of the thermodynamics engineering properties are pressure, volume and temperature of the working fluid.
Fundamental Laws of Thermodynamics
The most important part of thermodynamics engineering involves analyzing the behaviour of the working substance. Another important area is the laws of thermodynamics on which this branch is based on. These fundamental laws of thermodynamics engineering are-
- Zeroth law of thermodynamics
This law states that that when two bodies have temperature similar or equal with a third body, they in turn have equality of temperature with each other. All the bodies share a common property, which is the temperature.
- First law of thermodynamics
The first law of thermodynamics states that, when a system undergoes a change of state, the energy during the change may cross t boundary as either heat or work, which may be positive or negative. The net change in the energy of the system will be equal to the net energy that crosses the boundary of the system, which may change in the form of internal energy, kinetic energy, or potential energy.
- Second law of thermodynamics
The second law basically defines the direction in which a specific thermal process can take place. The second law of thermodynamics states that it is impossible to construct a device that operates in a cycle and produces no effect other than the transfer of heat from a cooler body to a hotter body. The second law of thermodynamics is sometimes called the law of entropy. Entropy can be stated of as a measure of how close a system is to equilibrium; it can also be defined as a measure of the disorder in the system.
- Third law of thermodynamics
The entropy of a perfect crystal of any pure substance approaches zero as the temperature approaches absolute zero. At zero temperature the system must be in a state with the minimum thermal energy. This statement holds true if the perfect crystal has only one state with minimum energy.
Some of the thermodynamics engineering applications include the designing of air conditioners and refrigerators, construction of turbo chargers and superchargers in automobile engines, making of steam turbines in power generation plants and creating the jet engines used in aircraft.
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