【摘要】：近年來,隨著全球溫室效應(yīng)的加重,氣候變化日益嚴(yán)峻,開始嚴(yán)重威脅到人類的生命財(cái)產(chǎn)安全。而在空調(diào)制冷系統(tǒng)中常用的各種制冷劑,則會(huì)導(dǎo)致臭氧層破壞和氣候變化,并且制冷劑與制冷空調(diào)系統(tǒng)的效率以及經(jīng)濟(jì)性直接相關(guān),因此新型制冷劑的開發(fā)與推廣對環(huán)境保護(hù)與制冷系統(tǒng)至關(guān)重要。制冷劑在壓縮機(jī)運(yùn)行過程中產(chǎn)生的泄漏會(huì)極大影響壓縮機(jī)的運(yùn)行效率,故研究制冷劑在壓縮機(jī)內(nèi)的泄漏過程,對改善壓縮機(jī)效率和節(jié)約能耗具有重要意義。針對制冷劑R1234yf在活塞壓縮機(jī)內(nèi)的工作過程,建立了制冷劑在泄漏通道內(nèi)數(shù)學(xué)模型,研究了制冷劑R1234yf的泄漏規(guī)律。研究表明,在活塞壓縮機(jī)的工作過程中制冷劑R1234yf的泄漏主要發(fā)生在壓縮過程與排氣過程。在給定工況下,隨著活塞壓縮機(jī)吸氣溫度的升高,泄漏通道內(nèi)制冷劑R1234yf的泄漏速度減小,進(jìn)而泄漏通道內(nèi)的泄漏質(zhì)量也隨之減小;隨著活塞壓縮機(jī)吸氣壓力的上升,泄漏通道內(nèi)的泄漏質(zhì)量隨之增大;隨著活塞壓縮機(jī)泄漏通道長度的增加,泄漏通道內(nèi)的泄漏質(zhì)量隨之減小;隨著活塞壓縮泄漏通道寬度的增加,泄漏通道內(nèi)的泄漏質(zhì)量流量也隨之增大。通過溫度和壓力在泄漏通道的耦合計(jì)算,研究溫度和壓力對泄漏通道的形變影響,聯(lián)合求得活塞壓縮機(jī)內(nèi)泄漏通道的變形規(guī)律。在給定工況下,隨著泄漏通道進(jìn)口溫度的升高,熱變形和總變形都會(huì)隨之增大,且差值也會(huì)逐漸增大。通過試驗(yàn)對活塞壓縮機(jī)內(nèi)潤滑油泄漏進(jìn)行了測試,為進(jìn)一步對制冷劑泄漏測試創(chuàng)造條件。
[Abstract]:In recent years, with the aggravation of global greenhouse effect, climate change is becoming more and more serious, which has begun to seriously threaten the safety of human life and property. The development and popularization of refrigerant is very important for environmental protection and refrigeration system.The leakage of refrigerant during the operation of compressor will greatly affect the operation efficiency of compressor.Therefore,it is of great significance to study the leakage process of refrigerant in compressor for improving the efficiency of compressor and saving energy consumption. The mathematical model of refrigerant in the leakage channel is established and the leakage law of refrigerant R1234yf is studied. The results show that the leakage of refrigerant R1234yf mainly occurs in the compression and exhaust processes during the operation of the piston compressor. The leakage speed of refrigerant R1234yf in the leakage channel decreases, and then the leakage quality in the leakage channel decreases; with the increase of suction pressure of the piston compressor, the leakage quality in the leakage channel increases; with the increase of the length of the leakage channel of the piston compressor, the leakage quality in the leakage channel decreases; with the increase of the piston pressure The coupling calculation of temperature and pressure in the leakage passage is carried out to study the effect of temperature and pressure on the deformation of the leakage passage, and the deformation law of the leakage passage in the piston compressor is obtained. With the increase of temperature, the thermal deformation and total deformation will increase, and the difference will also gradually increase. The leakage of lubricating oil in the piston compressor is tested, which will create conditions for further testing of refrigerant leakage.
【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)】：TB652

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