An investigation of nucleate boiling on a vertical array of horizontal plain tubes is presented in this paper. Experiments were performed with refrigerant RI 23 at reduced pressures varying from 0.022 to 0.64, tube pitch ...

The need for renewable energy sources, facing the consequences of Climate Change, results in growing investment for solar collectors’ use. Research in this field has accompanied this expansion and evacuated tube solar ...

The need of renewable energy sources due to climate change and thus the search for clean energy sources, justify the growing investment on new types of solar collectors. The research has contributed to this expansion in ...

The need for renewable energy sources, facing the consequences of Climate Change, results in growing investment for solar collectors’ use. Research in this field has accompanied this expansion and evacuated tube solar ...

This study reports on the fauna found in/on tubes of 10 species of Ceriantharia and discusses the characteristics of these occurrences, as well as the use of mollusc shells in ceriantharian tube construction. A total of ...

A Thermodynamic air-standard cycle was envisaged for Ranque-Hilsh (R-H) or Vortex Tubes to provide relevant Thermodynamic analysis and tools for setting operating limits according to the conservation laws of mass and energy, ...

This paper presents experimental results for flow boiling heat transfer coefficient and critical heat flux (CHF) in small flattened tubes. The tested flattened tubes have the same equivalent internal diameter of 2.2 mm, ...

Several API J55 steel tubings failed due to localized corrosion, after a year in service in water injector wells at an oil field. Microscopy observations, chemical analyses and computational fluid dynamic (CFD) numerical ...

The use of non-traditional methods to dispose mine tailings, such as geotextile tubes, has several advantages. For instance, it is possible to decrease risks regarding failure probability as well as to reduce the necessary ...

La investigación se basa en el uso e influencia YouTube como medio pedagógico para mejorar el aprendizaje de los estudiantes. Se basó en el uso frecuente de la plataforma de videos YouTube y su relación con el aprendizaje ...