發(fā)布時(shí)間：2018-05-14 06:53

  本文選題：R1234yf + 物性��； 參考：《華北理工大學(xué)》2017年碩士論文

【摘要】：基于能源和環(huán)保問題,新型制冷劑的開發(fā)研究已成為當(dāng)前制冷行業(yè)刻不容緩的任務(wù)。新一代綠色制冷劑R1234yf因具備良好的環(huán)保性和熱力學(xué)性質(zhì),引起了社會(huì)各界的廣泛關(guān)注。本研究針對(duì)制冷劑R1234yf開展了熱力學(xué)性質(zhì)和循環(huán)性能的研究,為制冷行業(yè)進(jìn)一步研發(fā)R1234yf空調(diào)制冷技術(shù)及熱泵產(chǎn)品奠定基礎(chǔ)。根據(jù)國(guó)內(nèi)外相關(guān)文獻(xiàn),篩選出精度較高的R1234yf物性經(jīng)驗(yàn)關(guān)聯(lián)式,編制了制冷劑R1234yf和含油制冷劑R1234yf/POE的物性程序,并與R134a的物性進(jìn)行比較,得出了R1234yf和R1234yf/POE的物性變化規(guī)律。研究表明,制冷劑R1234yf與R134a具有相似的熱物性,微量潤(rùn)滑油對(duì)制冷劑R1234yf的物性影響較小。基于熱力學(xué)第二定律,建立了R1234yf熱泵系統(tǒng)?損失模型,進(jìn)行了熱泵系統(tǒng)各部件不同工況下的?損失計(jì)算。同時(shí),研究了蒸發(fā)溫度、冷凝溫度及壓縮機(jī)等熵效率對(duì)R1234yf熱泵系統(tǒng)?效率的影響。研究表明,R1234yf熱泵系統(tǒng)?損失主要為壓縮機(jī),回?zé)崞鞯?損失很小,基本可以忽略。提高蒸發(fā)溫度或降低冷凝溫度在一定程度上可減小系統(tǒng)?損失,過熱度或壓縮機(jī)效率的增大可提高系統(tǒng)?效率。選取制冷劑R134a、R32及R1234yf三種工質(zhì)作為研究對(duì)象,編制了熱泵性能計(jì)算程序,分析了運(yùn)行參數(shù)及中間回?zé)崞鲗?duì)熱泵循環(huán)性能的影響。并設(shè)計(jì)出與實(shí)驗(yàn)系統(tǒng)相匹配的套管換熱器,搭建R1234yf熱泵系統(tǒng)實(shí)驗(yàn)臺(tái),測(cè)試了不同工況下的熱泵循環(huán)性能。實(shí)驗(yàn)結(jié)果表明:系統(tǒng)制冷量、COP0、制熱量及COPh均隨著蒸發(fā)溫度的升高而逐漸增大,隨著冷凝溫度的升高而逐漸減小,實(shí)驗(yàn)結(jié)果進(jìn)一步驗(yàn)證了理論分析的準(zhǔn)確性。
[Abstract]:Based on the problems of energy and environmental protection, the development and research of new refrigerants has become an urgent task in the refrigeration industry. The new generation green refrigerant R1234yf has attracted wide attention because of its good environmental protection and thermodynamic properties. In this study, the thermodynamic properties and cycle performance of refrigerant R1234yf were studied, which laid a foundation for further research and development of R1234yf air-conditioning refrigeration technology and heat pump products in refrigeration industry. According to the relevant literatures at home and abroad, the empirical correlations of R1234yf physical properties with high precision were screened out, and the physical properties of refrigerant R1234yf and oil-bearing refrigerant R1234yf/POE were programmed. The physical properties of R1234yf and R1234yf/POE were compared with those of R134a, and the physical properties of R1234yf and R1234yf/POE were obtained. The results show that the refrigerant R1234yf and R134a have similar thermal properties, and the microamount of lubricating oil has little effect on the physical properties of refrigerant R1234yf. Based on the second law of thermodynamics, the R1234yf heat pump system is established. Loss model, the heat pump system components under different operating conditions? Loss calculation. At the same time, the effects of evaporation temperature, condensation temperature and compressor isentropic efficiency on R1234yf heat pump system are studied. The effect of efficiency. The research shows that the R1234yf heat pump system? Losses are mainly for compressors, recuperators? The loss is small and negligible. Increasing evaporation temperature or lowering condensation temperature can reduce the system to a certain extent. Loss, superheat or compressor efficiency increases in system? Efficiency. Three kinds of refrigerant R134a / R32 and R1234yf were selected as the object of study. The calculation program of heat pump performance was compiled, and the influence of operating parameters and intermediate regenerator on the performance of heat pump was analyzed. The casing heat exchanger matched with the experimental system was designed and the R1234yf heat pump system test bench was built to test the cycle performance of the heat pump under different operating conditions. The experimental results show that the cooling capacity, heating capacity and COPh of the system increase with the increase of evaporation temperature and decrease with the increase of condensation temperature. The experimental results further verify the accuracy of the theoretical analysis.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB64

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉圣春;饒志明;楊旭凱;李葉;;新型制冷劑R1234yf的性能分析[J];制冷技術(shù);2013年01期

2 姜昆;劉穎;姜莎;;新一代制冷劑HFO-1234yf的熱物性模型[J];制冷學(xué)報(bào);2012年05期

3 孫艷秀;劉旭升;;HFC134a與HFO1234yf用于汽車空調(diào)的理論分析[J];低溫與超導(dǎo);2012年06期

4 陳偉;祁影霞;張華;;HCFCs制冷劑替代物研究進(jìn)展及性能分析[J];低溫與超導(dǎo);2011年12期

5 毛海萍;;R22氟利昂制冷劑的替代[J];壓縮機(jī)技術(shù);2011年03期

6 楊昭;吳曦;尹海蛟;劉煥衛(wèi);;低溫室效應(yīng)HCFCs替代物性能分析[J];制冷學(xué)報(bào);2011年01期

7 王博;張偉;馬洋博;曾紀(jì)s，

本文編號(hào)：1886794