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The ideal cycle for a heat engine is often considered to be the Carnot cycle, as it provides the maximum possible efficiency between two temperature reservoirs. This theoretical cycle operates through four reversible processes: two isothermal and two adiabatic. Although real engines cannot achieve Carnot efficiency due to practical limitations and irreversibilities, the Carnot cycle serves as a benchmark for evaluating the performance of actual heat engines. Other cycles, like the Otto or Diesel cycles, are commonly used in practice, but they are less efficient than the Carnot cycle.
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Why Air Standard Cycles are conceived?
Air standard cycles are conceived to permit thermodynamic calculations using the well-known and readily available thermodynamic properties of air. The results of such calculations may be used to predict compression ratio, specific heat ratio, and other operating parameters effects on thermal efficiency of a number of heat engines such as the Otto Cycle Heat Engine , the Diesel Cycle Heat Engine, and the Brayton Cycle Heat Engine.
How does the thermal efficiency of an ideal Otto Cycle change with the compression ratio of the engine and the specific heat ratio of the working fluid?
The answer is 38.
Limitations of the Carnot cycle for the operation of the steam power plant?
The Carnot cycle gives the theoretical maximum efficiency of an engine operating between two heat reservoirs. The Carnot cycle is an idealized engine cycle that is thermodynamically reversible. Real systems such as power plants are not reversible, and the entropy of a real material changes with temperature (which is not accounted for by the Carnot cycle). A steam power plant operates closer to a cycle known as the Rankine cycle.
Why you learn carnot cycle while it is not use in reality?
because it is the best theoretical engine. our aim is always to make our practical engine as close as that of carnot. if u don't know about the carnot cycle then how will u do that.
How does a heat engine differ from steam engine?
A heat engine is a broad term that encompasses any device that converts thermal energy into mechanical work, utilizing various heat sources and cycles. A steam engine, on the other hand, is a specific type of heat engine that primarily uses steam as its working fluid, typically generated by boiling water. While all steam engines are heat engines, not all heat engines are steam engines, as heat engines can also use gases or other fluids in their operation. The principles of operation may vary based on the type of working fluid and thermodynamic cycle employed.
Is open cycle gas turbine is heat engine or not?
yes, it is a heat engine. A heat engine is one that extracts heat energy and converts it to mechanical energy.
What is meant by Carnot cycle?
The Carnot cycle is a mathematical description of an engine that derives its power from heat.
What a heat engine does What a heat mover does?
A heat engine converts heat into mechanical energy, typically by using the heat to produce steam and drive a turbine. A heat mover, on the other hand, transfers heat from one place to another, such as in a refrigerator or air conditioner, by using a refrigerant to absorb and release heat through a thermodynamic cycle.
What is the heat engine cycle?
A heat engine cycle is a series of thermodynamic processes that convert heat energy into mechanical work. It typically involves four main stages: isothermal expansion, adiabatic expansion, isothermal compression, and adiabatic compression. During these stages, the working substance (often a gas) absorbs heat, performs work by expanding, and then releases heat while being compressed. Common examples of heat engine cycles include the Carnot cycle and the Otto cycle used in internal combustion engines.
Why Air Standard Cycles are conceived?
Air standard cycles are conceived to permit thermodynamic calculations using the well-known and readily available thermodynamic properties of air. The results of such calculations may be used to predict compression ratio, specific heat ratio, and other operating parameters effects on thermal efficiency of a number of heat engines such as the Otto Cycle Heat Engine , the Diesel Cycle Heat Engine, and the Brayton Cycle Heat Engine.
Is it possible to obtain electricity from biogas without a steam engine or turbine?
You could use a Sterling Cycle heat engine.
What is known as carnot heat engin?
carnot's heat heat engine is also known as ideal heat engine.because in carnot's the precess is reversible .Total heat converted into work . The efficiency is maximum for carnot's heat engine.
Why are both a hot and a cold reservior needed for a heat engine to operate?
A hot reservoir is needed to provide the heat input to the engine, allowing the working fluid to expand and do work. The cold reservoir is needed to absorb the excess heat from the engine, complete the thermodynamic cycle, and ensure efficiency by allowing the working fluid to be condensed back to its original state for the next cycle.
What is the Carnot engine problem and how does it relate to the efficiency of a heat engine?
The Carnot engine problem refers to the theoretical limit on the efficiency of heat engines, as described by the Carnot cycle. This problem highlights that no real heat engine can be 100 efficient, as some energy is always lost as heat. The efficiency of a heat engine is limited by the Carnot efficiency, which depends on the temperatures of the heat source and sink. This concept helps engineers understand and improve the efficiency of real-world heat engines.
In which step of the four-stroke engine cycle does the heat from the combustion reaction causes the pistons to move?
combustion and expansion
Does a 4 cycle engine require oil for proper functioning?
Yes, a 4-cycle engine requires oil for proper functioning. Oil lubricates the engine's moving parts and helps to reduce friction and heat, ensuring smooth operation and preventing damage.
What controls the heat pump to determine whether it is in the heat cycle or the cooling cycle?
what controls the heat pump to determine whether it is in the heating cycle or cooling cycle
