International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
A Review Paper on Performance evaluation of Nano fluids using Radiator effectiveness Ganore D J1, Kulkarni V S2, Sonawane K R 3 , Khandare R S4 1 M.E.
Student, Department of Mechanical Engineering MCOE & RC, Maharashtra, India
2 Asst.
Professor, Department of Mechanical Engineering MCOE & RC, Maharashtra, India
3 Asst.
Professor, Department of Mechanical Engineering MCOE & RC, Maharashtra, India
4 Asst. Professor, Department of Mechanical Engineering GCOE & RC, Maharashtra, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Newly emerging technologies due to their
temperature of gases will be around 2300-2500°C. This is a very high temperature and may result into burning of oil film between the moving parts and may result into seizing or welding of the same. So, this temperature must be reduced to about 150-200°C at which the engine will work most efficiently. Too much cooling is also not desirable since it reduces the thermal efficiency. So, the object of cooling system is to keep the engine running at its most efficient operating temperature. It is to be noted that the engine is quite inefficient when it is cold and hence the cooling system is designed in such a way that it prevents cooling when the engine is warming up and till it attains to maximum efficient operating temperature, then it starts cooling.
compactness are not being effectively served by the conventional heat transfer fluids. To serve these emerging technologies, Nano fluids are found to be better alternatives to the conventional heat transfer fluids. The heat transfer enhancement for many industrial applications by adding solid Nano particles to liquids is significant topics in the last few years. In this Paper, an attempt is made to review literature related to radiator effectiveness and its efficiency improvement techniques. Finely good technique is selected for further study. Key Words: Radiator Effectiveness, nanofluids, efficiency improvement techniques.
1.2 Air Cooling System
1. INTRODUCTION
Air cooled system is generally used in small engines say up to 15-20 kW and in aero plane engines. In this system fins or extended surfaces are provided on the cylinder walls, cylinder head, etc. Heat generated due to combustion in the engine cylinder will be conducted to the fins and when the air flows over the fins, heat will be dissipated to air.
The performance of the conventional engine-cooling system has always been constrained by the passive nature of the system and the need to provide the required heat-rejection capability at high power conditions. This leads to considerable losses in the cooling system at part-load conditions where vehicles operate most of the time. A set of design and operating features from advanced engine-cooling systems is reviewed and evaluated for their potential to provide improved engine protection while improving fuel efficiency and emissions output. Although these features demonstrate significant potential to improve engine performance, their full potential is limited by the need to balance between satisfying the engine-cooling requirement under all operating ambient conditions and the system effectiveness, as with any conventional engine-cooling system. The introduction of controllable elements allows limits to be placed on the operating envelop of the cooling system without restricting the benefits offered by adopting these features. The integration of split cooling and precision cooling with controllable elements has been identified as the most promising set of concepts to be adopted in a modern engine-cooling system. We know that in case of Internal Combustion engines, combustion of air and fuel takes place inside the engine cylinder and hot gases are generated. The
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1.2 Water Cooling System In this method, cooling water jackets are provided around the cylinder, cylinder head, valve seats etc. The water when circulated through the jackets, it absorbs heat of combustion. This hot water will then be cooling in the radiator partially by a fan and partially by the flow developed by the forward motion of the vehicle. The cooled water is again recirculating through the water jackets.
2. LITERATURE REVIEW Das et al. [1] investigated the increase of thermal conductivity with temperature for Nano fluids with water as base fluid and particles of Al2O3 or CuO as suspension material. It has been observed that the enhancement is considerably increased for Nano fluids with Al2O3 as well.
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