【摘要】：作為現(xiàn)今空調(diào)系統(tǒng)常用的制冷劑,氫氟烴是一類潛在溫室氣體,并且它們對氣候變化的影響會不斷增長。未來,氫氟烴的使用將逐漸減少,因此必須尋找適合的替代工質(zhì)。本文顯示,僅有少數(shù)幾種單一工質(zhì)具有作為制冷劑所必需擁有的化學(xué)、環(huán)境、熱力學(xué)和安全的綜合特性,同時這些工質(zhì)至少是微可燃的。根據(jù)篩選標(biāo)準(zhǔn)從一個綜合化學(xué)品數(shù)據(jù)庫中搜索了一些替代品。對于這些通過了熱力學(xué)和環(huán)境特性篩選(臨界溫度和全球變暖潛能值)的工質(zhì),在小型空調(diào)系統(tǒng)中進(jìn)行了性能模擬,其中包括換熱器的優(yōu)化。發(fā)現(xiàn)當(dāng)考慮到更實際的系統(tǒng)時,存在于理想分析中的效率和制冷量之間的平衡就消失了。最高效率出現(xiàn)在較高單位容積制冷量附近,但存在于這個范圍內(nèi)的工質(zhì)極少。
[Abstract]:As refrigerants commonly used in air conditioning systems today, hydrofluorocarbons (HFCs) are a class of potential greenhouse gases and their impact on climate change is increasing. In the future, the use of hydrofluorocarbons will be gradually reduced, so it is necessary to find suitable alternatives. In this paper, it is shown that only a few single refrigerants have the chemical, environmental, thermodynamic and safety properties required to be refrigerants, and at the same time, these working fluids are at least slightly combustible. Some alternatives were searched from a comprehensive chemical database based on screening criteria. For these refrigerants which have passed the thermodynamic and environmental characteristics screening (critical temperature and global warming potential) performance simulations have been carried out in small air-conditioning systems including optimization of heat exchangers. It is found that the balance between efficiency and cooling capacity existing in ideal analysis disappears when more practical systems are considered. The maximum efficiency occurs near the higher unit volume refrigerating capacity, but very few working fluids exist in this range.
【作者單位】： 美國國家標(biāo)準(zhǔn)和技術(shù)研究院;美國天主教大學(xué);亞太建設(shè)科技信息研究院有限公司;
【分類號】：TB64

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