Effect of Nanoparticle and Inclination Angle at Thermal Efficiency in Heatpipes

Effect of Nanoparticle and Inclination Angle at Thermal Efficiency in Heatpipes

Sina Razvarz, Raheleh Jafari, Cristóbal Vargas Jarillo, Alexander Gegov
Copyright: © 2021 |Pages: 18
DOI: 10.4018/978-1-7998-3479-3.ch087
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This chapter demonstrated an experimental study about the effect of inclination angle and nano particles in active fluids and curves related to thermosiphons and heatpipes. In this context, the chapter gives a brief overview of the effect of nano fluids on thermal conductivity and thermal efficiency enhancement of a heat pipe on the different operating state and next idea is studying of efficacy related to the inclination angle of the heat pipe. In this book chapter, there is an experimental investigation employing Al2O3 nanoparticle in order to study the enhancement of thermal characteristics of a heat tube in different inclination angle. Three cases, for Al2O3 nanoparticles in water with volume concentrations 1%, 2%, and 3% are considered and results are compared with the thermal performance of the heat pipe filled with pure water. The result of each case will present in the different angular of pipeline and clearly will show the effect of the gravity in the pipeline.
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Recently, the proficiency of the engineering applications have become more notable. Continuous advancement have become essential in order to maintain the technology itself. Technology has improved significantly by accepting novel opinions and approaches for effective application, storage as well as transmission of energy. Nanotechnology is one of the most noteworthy fields which fascinates the researchers because of its superior capability, enabling a considerable advancement in the efficiency of several devices. Over the past few decades remarkable investigations have been carried out in order to implement nanotechnology in heat transfer usages. Nanofluids can be considered as a novel improvement in thermo-fluidics, acquired by stirring nano particles in conventional fluids (Choi, 1998). Investigators are taken nanoparticles of various metals, metal oxides, carbides, nitrides, as well as various kinds of carbon with several base fluids to be mentioned as water, ethylene glycol (EG) as well as engine oils.

Industrial engineering is one of the fields that artificial neural network, fuzzy logic, and nano technology have found an extensive implementation area (Razvarz et al., 2017;Jafari &Yu, 2018 ; Jafari & Razvarz, 2017, 2018, Jafari et al., 2016, 2018a, 2018b, 2019a, 2019b; Jafarian et al., 2012). Nanoscale refers size dimensions between approximately 1 and 100 nm (or more appropriately, 0.2 and 100 nm) because at this scale the properties of materials differ with respect to their physical properties from a larger scale.

The size dimensions of Nanoscale are among nearly 1 and 100 nm (or more suitably, 0.2 and 100 nm), since at this scale the attributes of materials change concerning their physical attributes from a greater scale. Every material which contains one or more dimensions in the nanoscale is stated as nanomaterial(Sekhon, 2014). Nanoparticles contain distinct biological attributes such as tiny size, a great surface-area-to-volume.

Nanofluids have been constructed by utilizing two techniques: one step technique and two step technique (Eastaman et al., 2001) The principal aim of these techniques is to provide a homogeneous as well as stable solid-liquid mixture, also avoiding the agglomeration, feasible erosion and clogging etc. In one step technique, the nanoparticles have been constructed and dispersed into the foundation fluid at the same time. Whereas in a two step technique, the nanoparticle has been generated in the first step and dispersed into host fluids in the second step. Investigation reveals that nanofluids with oxide nanoparticles and carbon nanotubes can be produced utilizing two step technique. Two step technique is not appropriate for metallic nanoparticles. Under particular circumstances, nanofluids represent excellent thermo physical features that result in better effect of the thermal usage (Singh & Raykar, 2008).

Key Terms in this Chapter

Thermal Resistance: The ability of a material to resist flow of heat.

Nano Materials: Materials of which a single unit is sized between 1 to 1000 nanometers (10 -9 meter)

Thermosyphon: A device that transfers heat via natural convection in a fluid.

Condenser: A device that cools gases into liquids.

Aluminum Oxide: A chemical compound of aluminum and oxygen with the chemical formula Al2O3.

Evaporator: A vessel or stage which turns a liquid into vapor.

Heat Pipe: Tubular device that is very efficient in transferring heat.

Heat Transfer: The movement of thermal energy from one thing to another thing of different temperature.

Nanofluids: A fluid containing nanometer-sized particles, called nanoparticles.

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