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The Optimal Thermodynamic Analysis of Irreversible Joule-Brayton and Its Combined Cycle

Author: LiYanBing
Tutor: HuangYueWu
School: Donghua University
Course: Thermal Power Engineering
Keywords: Brayton cycle Combined cycle Irreversible process Optimization
CLC: TK123
Type: Master's thesis
Year: 2012
Downloads: 27
Quote: 0
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Abstract


In this paper, based on systematic summary of the theory of finite-time thermodynamics and Joule - Brayton Thermodynamic Cycle Performance Optimization Research, consider the loss of thermal resistance of the heat exchanger in the circulatory system, circulatory system to the gas compression process and the internal efficiency of the turbine process the inside is not reversible, irreversibility and heat leakage losses through theoretical analysis and numerical calculation, irreversible Joule - Brayton its cogeneration, combined cycle performance analysis, some theoretical significance and practical value of the conclusions . This paper consists of the following three parts: the first part of the irreversible reciprocating Brayton cycle, for example, the second chapter focuses on the working fluid in the loop varies with temperature specific heat of the non-isentropic compression and expansion process, and thermal heat loss variety of irreversible reciprocating Brayton cycle performance. In the case of the parameter values ??of the given series, draw out the performance characteristic curve of the thermal machine, draw some important parameters such as the pressure ratio and the temperature of the working fluid optimization interval. The second part of the study irreversible Joule - Brayton reactive hot for the circulatory system of fire performance. Consider the power and heat is heterogeneous Chapter thermodynamic optimization theory exergy Joule - Brayton of reactive hot and for system optimization analysis. First, the irreversible Joule - Bradley Raton reactive thermal and supply system, consisting of system design parameters theoretical model, considered from the compressor and turbine machine Non entropy compression and expansion losses, working fluid, three-heat between the heat exchanger is not reversible heat loss and heat source heat leakage loss caused irreversible. Then analyze the strengths and weaknesses of the existing on reactive hot and evaluation criteria for system performance. Finally, select a reasonable fire on the coefficient of performance, reactive hot and for efficiency irreversible Joule - Brayton reactive hot and for system performance comparison analysis, the numerical analysis of the design parameters of the system objective function. Some important parameters optimization interval. The third part of the theory of finite-time thermodynamics analysis of a solar-powered irreversible Brayton combined cycle - Rankine efficiency and ecology coefficient of performance. Chapter the efficiency and ecology coefficient of performance indicators as the optimization objective, to establish a thermal resistance, heat leakage, internal irreversibility solar drive the unsteady flow Breton - Rankine combined cycle model, various factors discussed by numerical examples. combined cycle efficiency and ecology coefficient of performance. The conclusions of this thesis, is closer to the actual thermal performance characteristics help optimize the design and performance improvement of the heat engine.

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Engineering Thermodynamics
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