Lubricating Properties of Polyester Oils and R404A Refrigerant Mixtures under Starved Lubrication Conditions

• Autorzy: Górny Kasper , Stachowiak Arkadiusz , Tyczewski Przemysław , Zwierzycki Wiesław

Identyfikatory

DOI

10.5604/01.3001.0016.1019

Warianty tytułu

PL

Właściwości smarne mieszanin olejów poliestrowych z czynnikiem chłodniczym R404A w waunkach skąpego smarowania

• Języki publikacji: EN

Abstrakty

EN

There has been a dynamic shift towards the use of ecological refrigerants in the refrigeration industry. Currently, they must not contain fluorine and chlorine. The substances that deplete the ozone layer have already been withdrawn, and the refrigerants that increase the greenhouse effect are getting restricted. Until recently, R404A was a quite commonly used HFC refrigerant for commercial refrigeration equipment in both small and large systems. Although R404A refrigerant has considerable greenhouse effect potential, it has not been banned from use in existing refrigeration systems. The widespread use of R404A refrigerant requires appropriate compressor lubricants.In refrigeration compressors, the amount of oil in friction pairs in certain situations may be insufficient. In that event, poor lubrication conditions may occur. There may also be a situation in which the areas of friction lack lubricant and friction pairs are lubricated only by the refrigerant.The article contains a methodical selection of test parameters for polyester oils, allowing one to assess the lubricating properties of the mixtures of oils for refrigeration compressors and refrigerants under poor lubrication conditions. The article also includes the results of wear tests which allow one to evaluate the lubricating properties of oil-refrigerant mixtures under starved lubrication conditions for R404A refrigerant and polyester oils.

PL

Obecnie w chłodnictwie następuje dynamiczny zwrot w kierunku stosowania ekologicznych czynników chłodniczych. Dość powszechnie stosowanym czynnikiem chłodniczym z grupy HFC dla komercyjnych urządzeń chłodniczych zarówno w małych jak i dużych instalacjach był do niedawna R404A, co wiąże się z potrzebą doboru odpowiednich sprężarkowych środków smarnych. W sprężarkach chłodniczych może wystąpić sytuacja, w której ilość oleju w węzłach tarcia jest niewystarczająca. Wówczas mogą wystąpić skąpe warunki smarowania lub smarowanie tylko przez czynnik chłodniczy. W artykule przedstawiono metodyczny dobór parametrów badań pozwalających na ocenę właściwości smarnych olejów do sprężarek chłodniczych w mieszaninie z czynnikiem chłodniczym w warunkach skąpego smarowania dla olejów poliestrowych. Umieszczono również wyniki badań zużyciowych pozwalających na ocenę właściwości smarnych mieszanin olej – czynnik chłodniczy w warunkach skąpego smarowania uzyskanych dla czynnika chłodniczego R404A z olejami poliestrowymi.

Słowa kluczowe

EN

oil/refrigerant mixture; lubricating properties; starved lubrication

PL

mieszanina olej/czynnik chłodniczy; właściwości smarne; skąpe smarowanie

• Wydawca: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
• Czasopismo: Tribologia
• Rocznik: 2022
• Tom: nr 3
• Strony: 9--15
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wykr., wz.

Twórcy

autor

Górny Kasper

• Poznan University of Technology, Faculty of Civil and Transport Engineering, Institute of Machines and Motor Vehicles, Piotrowo 3 Street, 60-965 Poznań, Poland.

• https://orcid.org/0000-0002-5551-2690

autor

Stachowiak Arkadiusz

• Poznan University of Technology, Faculty of Civil and Transport Engineering, Institute of Machines and Motor Vehicles, Piotrowo 3 Street, 60-965 Poznań, Poland.

• https://orcid.org/0000-0002-4170-6507

autor

Tyczewski Przemysław

• Poznan University of Technology, Faculty of Civil and Transport Engineering, Institute of Machines and Motor Vehicles, Piotrowo 3 Street, 60-965 Poznań, Poland.

• https://orcid.org/0000-0001-7771-7091

autor

Zwierzycki Wiesław

• Poznan University of Technology, Faculty of Civil and Transport Engineering, Institute of Machines and Motor Vehicles, Piotrowo 3 Street, 60-965 Poznań, Poland.

• https://orcid.org/0000-0002-9950-4799

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).