本文選題：斯特林制冷機 + 鐵電晶體材料　； 參考：《河北科技大學(xué)》2014年碩士論文

【摘要】：當今制冷技術(shù)已廣泛應(yīng)用于許多領(lǐng)域，如國防通訊、生活起居、工作環(huán)境、等等，為了更加貼近實際，許多學(xué)者開始從有限時間熱力學(xué)的角度來研究制冷系統(tǒng)。同時，隨著科學(xué)技術(shù)的發(fā)展，溫室效應(yīng)問題也日趨嚴重。為了解決這些矛盾，固體制冷引起人們的注意，其中的鐵電晶體斯特林制冷機以其高效率、低噪音、環(huán)保和便于維護等優(yōu)點而備受推崇得到了越來越多科技工作者的關(guān)注。近幾年來，許多有關(guān)鐵電制冷材料、鐵電制冷樣機和鐵電制冷循環(huán)理論等研究已成為熱門研究課題。圍繞制冷循環(huán)中實際存在的各種不可逆因素，學(xué)者們已經(jīng)分析計算出一到兩種不可逆因素對制冷循環(huán)性能的影響。本論文將在這些研究成果的基礎(chǔ)上開展鐵電斯特林制冷循環(huán)性能的研究，分析多種不可逆因素并存時對鐵電斯特林制冷循環(huán)的影響，，用最優(yōu)控制理論方法優(yōu)化性能參量，從而提高系統(tǒng)的整體性能。所建立的模型更加貼近實際，獲得的理論具有更大的普遍性，而且有極大的實用價值。 第一章簡要介紹有限時間熱力學(xué)的產(chǎn)生和發(fā)展現(xiàn)狀。闡述了鐵電晶體的基本特性原理及制冷優(yōu)勢。 第二章建立不可逆鐵電斯特林制冷循環(huán)循環(huán)新模型，在鐵電晶體的熱力學(xué)性質(zhì)基礎(chǔ)，利用有限時間熱力學(xué)、最優(yōu)控制理論，推導(dǎo)出制冷率、制冷系數(shù)的數(shù)學(xué)表達式，并以制冷系數(shù)為目標函數(shù)對循環(huán)的制冷率進行優(yōu)化分析。應(yīng)用數(shù)值計算獲得制冷率制冷系數(shù)的性能曲線，并分析其優(yōu)化工作區(qū)域。 第三章繼續(xù)深入推導(dǎo)有限速率熱傳導(dǎo)、回?zé)釗p失、熱漏損失、和工質(zhì)內(nèi)不可逆性等因素對鐵電斯特林制冷循環(huán)影響，數(shù)值計算和圖解法詳細討論了這些不可逆因素對制冷循環(huán)的影響程度，獲得了輸入功率、極限制冷溫度、等溫時間比等重要性能參量數(shù)學(xué)表式及相關(guān)界限。文章最后對幾種特殊情況作了分析討論，得出了與文獻中一致的理論。本論文所得結(jié)論可以作為進一步深入研究鐵電斯特林制冷循環(huán)系統(tǒng)性能特性的理論基礎(chǔ)，也可以對鐵電晶體斯特林制冷機的參數(shù)優(yōu)化設(shè)計、性能改善有所幫助。
[Abstract]:Nowadays, refrigeration technology has been widely used in many fields, such as national defense communication, daily life, working environment, and so on. In order to get closer to reality, many scholars have begun to study refrigeration system from the point of view of finite time thermodynamics. At the same time, with the development of science and technology, Greenhouse Effect problem is becoming more and more serious. In order to solve these problems, solid state refrigeration has attracted people's attention. The ferroelectric crystal Stirling refrigerator has been paid more and more attention by more and more scientists because of its high efficiency, low noise, environmental protection and easy maintenance. In recent years, many researches on ferroelectric refrigeration materials, ferroelectric refrigeration prototypes and ferroelectric refrigeration cycle theory have become a hot research topic. Focusing on the actual existence of various irreversible factors in the refrigeration cycle, scholars have analyzed and calculated the influence of one or two irreversible factors on the performance of the refrigeration cycle. On the basis of these research results, this paper will study the performance of ferroelectric Stirling refrigeration cycle, analyze the influence of many irreversible factors on the ferroelectric Stirling refrigeration cycle, and optimize the performance parameters with the optimal control theory. In order to improve the overall performance of the system. The established model is closer to reality, and the obtained theory is more universal and of great practical value. The first chapter briefly introduces the generation and development of finite time thermodynamics. The basic characteristic principle and refrigeration advantage of ferroelectric crystal are described. In the second chapter, a new model of irreversible ferroelectric Stirling refrigeration cycle is established. Based on the thermodynamic properties of ferroelectric crystals, the mathematical expressions of refrigeration rate and refrigeration coefficient are derived by using finite time thermodynamics and optimal control theory. The refrigeration rate of the cycle is optimized and analyzed with the refrigeration coefficient as the objective function. The performance curve of refrigeration coefficient was obtained by numerical calculation, and the optimum working area was analyzed. In chapter 3, the influence of finite rate heat conduction, heat recovery loss, heat leakage loss, and irreversibility of refrigerant on the ferroelectric Stirling refrigeration cycle is derived. The influence of these irreversible factors on the refrigeration cycle is discussed in detail by numerical calculation and graphical method. The mathematical expressions and relevant bounds of important performance parameters, such as input power, limit refrigeration temperature and isothermal time ratio, are obtained. At the end of this paper, several special cases are analyzed and discussed, and the theory which is consistent with the literature is obtained. The conclusions obtained in this paper can be used as the theoretical basis for further research on the performance characteristics of ferroelectric Stirling refrigeration cycle, and can also be helpful to the optimization design of the parameters of the ferroelectric Stirling refrigerator and the improvement of its performance.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB651

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