本文選題：濕度　切入點(diǎn)：溫濕度獨(dú)立控制　出處：《重慶大學(xué)》2014年碩士論文

【摘要】：目前，大多數(shù)房間空調(diào)器都是以R410a為制冷劑的單級(jí)蒸氣壓縮式制冷系統(tǒng)，通過室內(nèi)機(jī)與室內(nèi)空氣熱量的交換完成溫濕度的控制任務(wù)。雖然這能夠達(dá)到人體對(duì)于溫度的基本要求，，但是僅僅使用一個(gè)蒸發(fā)器很難實(shí)現(xiàn)溫濕度雙參數(shù)的精確控制，往往由于單一地強(qiáng)調(diào)對(duì)室內(nèi)溫度的控制而忽略了人體對(duì)于濕度的需求，導(dǎo)致溫、濕度不能同時(shí)滿足人體要求。同時(shí)，由于制冷工質(zhì)在制冷系統(tǒng)冷凝器和蒸發(fā)器中保持等溫冷凝和等溫蒸發(fā)，很大程度上增加了制冷劑與室內(nèi)空氣之間的傳熱溫差，使循環(huán)的不可逆性增加，制冷系數(shù)下降，從而造成一些不必要的能量消耗。 針對(duì)現(xiàn)有空調(diào)制冷系統(tǒng)所存在的問題，本文根據(jù)自復(fù)疊制冷系統(tǒng)易于實(shí)現(xiàn)雙溫區(qū)的特點(diǎn)，將其做了一些改動(dòng)用于房間空調(diào)器，從而設(shè)計(jì)出了一種能夠?qū)崿F(xiàn)溫濕度獨(dú)立控制的房間空調(diào)器制冷系統(tǒng)，該系統(tǒng)兼顧對(duì)溫度和濕度的處理過程，能夠避免了常規(guī)空調(diào)系統(tǒng)中溫濕度聯(lián)合處理所帶來的損失，起到了更好的節(jié)能效果。由于溫度和濕度采用了獨(dú)立的調(diào)節(jié)環(huán)節(jié)，克服了常規(guī)空調(diào)系統(tǒng)中不易于同時(shí)滿足人體對(duì)溫濕度參數(shù)的要求，避免了室內(nèi)濕度過高或過低的現(xiàn)象。本文從以下幾個(gè)方面對(duì)該系統(tǒng)做了研究和分析： ①基于CFCs替代物的選擇要求以及混合工質(zhì)的溫度滑移特性，選取R32和R326fa作為制冷系統(tǒng)的制冷劑； ②針對(duì)傳統(tǒng)的氣體狀態(tài)方程不能夠描述氣液兩相P-V-T關(guān)系的問題，采用狀態(tài)方程法（EOS法），即結(jié)合PR狀態(tài)方程式對(duì)處于氣液相平衡的混合工質(zhì)的熱力學(xué)參數(shù)進(jìn)行計(jì)算； ③編制混合工質(zhì)物性計(jì)算程序模塊，完成制冷循環(huán)過程基本熱物性的計(jì)算，為循環(huán)系統(tǒng)的設(shè)備選型提供相應(yīng)的參數(shù)； ④建立自復(fù)疊循環(huán)系統(tǒng)物理模型，編寫氣液相平衡模擬程序。分析了循環(huán)濃度和壓縮機(jī)W'比對(duì)該制冷系統(tǒng)性能系數(shù)的影響，從而能夠找到在給定工況下的最佳濃度比及其壓力比； ⑤考慮到系統(tǒng)高壓側(cè)配管存在的安全隱患，針對(duì)壓縮機(jī)排氣側(cè)配管應(yīng)力進(jìn)行了試驗(yàn)研究和CAE模擬分析。
[Abstract]:At present, most room air conditioners are single-stage vapor compression refrigeration systems with R410a as refrigerant. The control tasks of temperature and humidity are accomplished by the exchange of heat between indoor air and indoor machines, although this can meet the basic requirements of human body for temperature. However, it is difficult to realize the accurate control of temperature and humidity by using only one evaporator. Because of the single emphasis on the control of indoor temperature, the human body's requirement for humidity is neglected, which leads to the temperature. The humidity can not meet the requirements of the human body at the same time. At the same time, because the refrigerant keeps isothermal condensation and evaporation in the condenser and evaporator of the refrigeration system, the heat transfer temperature difference between the refrigerant and the indoor air is increased to a great extent. The irreversibility of the cycle is increased and the refrigeration coefficient is reduced, resulting in some unnecessary energy consumption. In view of the problems existing in the existing air-conditioning refrigeration system, according to the characteristics of the self-cascade refrigeration system which is easy to realize the double temperature zone, some modifications are made for the room air conditioner. Thus, a room air conditioner refrigeration system which can realize the independent control of temperature and humidity is designed. The system takes into account the processing process of temperature and humidity, and can avoid the loss caused by the combined treatment of temperature and humidity in the conventional air conditioning system. Because the temperature and humidity are adjusted independently, it is difficult to meet the requirements of temperature and humidity parameters in the conventional air conditioning system at the same time. The system is studied and analyzed from the following aspects:. 1 based on the choice of CFCs substitute and the temperature slip characteristics of mixed refrigerants, R32 and R326fa are selected as refrigerants in refrigeration system; (2) in view of the problem that the traditional gas equation of state can not describe the gas-liquid two-phase P-V-T relationship, the thermodynamic parameters of the mixture in gas-liquid equilibrium are calculated by using the EOS method combined with the PR equation of state. (3) compiling the calculation program module of the physical properties of the mixed working fluid, completing the calculation of the basic thermal properties of the refrigeration cycle, and providing the corresponding parameters for the equipment selection of the circulating system; (4) the physical model of self-stacking cycle system is established, and the simulation program of gas-liquid phase equilibrium is compiled. The effects of cycle concentration and compressor W' ratio on the performance coefficient of the refrigeration system are analyzed. Thus, the optimum concentration ratio and pressure ratio under given working conditions can be found. 5. Considering the hidden danger of high pressure side pipe distribution in the system, the stress of the compressor exhaust side pipe is studied experimentally and simulated by CAE.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB657.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 趙力,張啟,涂光備;一種新型工質(zhì)在熱泵、空調(diào)工況下的試驗(yàn)分析[J];化工學(xué)報(bào);2002年09期

2 趙力;一種非共沸循環(huán)工質(zhì)與R22的性能對(duì)比實(shí)驗(yàn)[J];化工學(xué)報(bào);2004年08期

3 張光輝;;空調(diào)制冷劑的選擇[J];山西建筑;2010年07期

4 張立志,江億;膜法空氣除濕的研究與進(jìn)展[J];暖通空調(diào);1999年06期

5 梁小偉;詹沖;徐樂;;空調(diào)系統(tǒng)中材料的相容性試驗(yàn)方法分析[J];上海電氣技術(shù);2011年01期

6 王倩;;空調(diào)系統(tǒng)中的除濕技術(shù)[J];廣東石油化工學(xué)院學(xué)報(bào);2013年04期

7 陶鍇;晏剛;張敏;馮永斌;;具有中間壓力調(diào)節(jié)功能的新型自復(fù)疊熱泵[J];西安交通大學(xué)學(xué)報(bào);2010年09期

8 謝海敏;;空調(diào)系統(tǒng)中的除濕技術(shù)及其節(jié)能分析[J];應(yīng)用能源技術(shù);2008年04期

9 李麗芬;陳旭;;單元式空調(diào)機(jī)冷卻除濕技術(shù)分析[J];制冷與空調(diào);2011年04期

10 朱強(qiáng);蒸發(fā)器中非共沸混合工質(zhì)的換熱特性[J];制冷學(xué)報(bào);2004年01期

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