BaTiO3/SrTiO3@MO Hibrit Nanoyağlayıcılar için Termofiziksel Özelliklerin Araştırılması

Year 2023, , 437 - 443, 27.03.2023

Mustafa Akkaya

https://doi.org/10.2339/politeknik.1225173

Abstract

Son yıllarda ısıtma sistemlerinde nanoakışkanlar, soğutma ve iklimlendirme sistemlerinde de nanoyağlayıcılar çalışma sıvısı olarak kullanılmaktadır. Isı transfer özelliklerin gelişiminde, bu süspansiyonlarda metal oksitlere ve karbon bazlı bileşiklere yoğun şekilde yer verilmektedir. Birden fazla nanopartikülün hibrit olarak birleştirilmesiyle elde edilen nanoyağlayıcılar sıklıkla kullanılmaktadır. Bu bağlamda, BaTiO3/SrTiO3@MO hibrit nanoyağlayıcısının yoğunluk, ısı kapasitesi, termal iletkenlik ve viskozite gibi termofiziksel özellikleri hesaplanmıştır ve karşılaştırmalar yapılmıştır. Çalışmada hibrit yapı içerisinde katı parçacık olarak BaTiO3 ve SrTiO3 nanopartikülleri kullanılmıştır. Nanoyağlayıcı içerisindeki nanopartiküllerin termofiziksel özellikleri de incelenmiştir. Nanopartiküllerin, hibrit yapı içerisindeki karıştırma oranı 1:1 olarak katkılanmıştır. Ayrıca, 100 ml mineral yağ (MO) içerisindeki partükül kütle fraksiyonu %1.0 olarak belirlenmiştir. Tekli ve hibrit nanoyağlayıcıların termofiziksel özellikleri kıyaslandığında, soğutma sistemleri için hibrit yapıların performansının daha iyi olduğu görülmüştür.

Keywords

Termofiziksel Özellikler, Nanoyağlayıcı, BaTiO3, SrTiO3

The Probe of Thermophysical Properties for BaTiO3/SrTiO3@MO Hybrid Nanolubricants

Abstract

In recent years, nanofluids have been used in heating systems and nanolubricants as working fluids in refrigeration and air conditioning systems. In the development of heat transfer properties, metal oxides and carbon-based compounds are mainly used in these suspensions. Often, nanolubricants are used, which are produced by combining several nanoparticles as a hybrid. In this context, the thermophysical properties of the hybrid nanolubricant BaTiO3/SrTiO3@MO such as density, heat capacity, thermal conductivity and viscosity were calculated and compared. In the study, BaTiO3 and SrTiO3 nanoparticles were used as solid particles in the hybrid structure. The thermophysical properties of the nanoparticles in the nanolubricant were also investigated. The mixing ratio of the nanoparticles in the hybrid structure was 1:1, and the particle mass fraction in 100 ml of mineral oil (MO) was also set at 1.0%. When comparing the thermophysical properties of mono and hybrid nanolubricants, it was found that the performance of the hybrid structures was better for cooling systems.

Keywords

Thermophysical Properties, Nanolubricant, BaTiO3, SrTiO3.

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