Now days nanofluid has became blessings for researchers. Experimental research on heat transfer characteristics of cuo. On product applications as seen in magazine how to. Heat transfer enhancement of nanofluids sciencedirect. Applications of nanofluid for heat transfer enhancement. The experiments are conducted in a concentric tube heat exchanger to study the heat transfer rates of znowater nanofluid for different flow rates and for different volume fractions of nano. Forced convection in a heat exchanger transfers the heat from one moving stream to another stream through the wall. May 05, 20 graphite materials are used in heat exchangers because they provide good refractory and mechanical properties but still maintain a high thermal conductivity. Heat exchangers are used in both cooling and heating processes. The opening chapters explain governing equations and then move on to discussions of free and forced convection heat transfers of nanofluids. Pdf effect of nanofluid on heat transfer characteristics of double. It may be within the solid or solid fluid interface or within the gas itself having temperature gradient. The world wide researchers are making hard efforts to find out suitable alternatives for heat exchangers with different geometry and varying parameters which effects on performance of heat exchanger.
The results show that the convection heat transfer coefficient and. Request pdf on oct 1, 2012, gabriela huminic and others published application of nanofluids in heat exchangers. Vinutha3 1,2,3mechanical engineering, sitam abstractin this project studying of double pipe heat exchange type in which the inner and annualar tubes are made of gi and ss304 materials respectively. Introduction car radiator, one example of compact heat exchanger, is an important part in automotive cooling system. Wadkar department of mechanical engineering, savitribai phule pune university, pune, india accepted 12 march 2017, available online 16 march 2017, special issue7 march 2017 abstract. Nader nikkam, morteza ghanbarpor, mohsin saleemi, muhammet s. Deore 1pg student,2pg student,3head of the department 1sad vidyamandal institute of technology, bharuch392001, gujarat,india 1sunny. The heat exchanger will be supplied with oil, at 55o c 548. Cuo and tio 2 nanoparticles with diameters of 24 nm dispersed in water with volume concentrations of 0. It may be within the solid or solid fluid interface or within the gas itself having temperature.
Graphite materials are used in heat exchangers because they provide good refractory and mechanical properties but still maintain a high thermal conductivity. The results showe that the temperature difference and heat transfer coefficient for heat exchanger with finned tube is. Vinutha3 1,2,3mechanical engineering, sitam abstractin this. Applications of nanofluid for heat transfer enhancement explores recent progress in computational fluid dynamic and nonlinear science and its applications to nanofluid flow and heat transfer. Two of the simplest and most important problems are referred to as the rating and sizing problems. Based nanofluids for heat transfer applications, materials research society, proceedings of the symposium on nanoscale heat transportfrom fundamentals to devices, 20, 1543, 143148 4. A heat exchanger is a system used to transfer heat between two or more fluids. Higher temperatures may be reached with special gasket and adhesive materials.
The results showe that the temperature difference and heat transfer coefficient for heat exchanger with finned tube is higher than with smooth tube. Nguyen experimentally investigated the heat transfer in phe and reported an enhancement in the heat transfer rates 7, pantzali et al also studied the effects using cuo. Experimental investigation of plate heat exchanger using. Design and development of shell and tube heat exchanger. In the present work a threedimensional analysis is used to study the heat transfer characteristics of a doubletube helical heat exchangers using nanofluids under laminar flow conditions. Toprak, mamoun muhammed and rahmatollah khodabandeh, thermal and rheological properties. The heat transfer performance of the plate heat exchanger phe was investigated using mwcnttio nano.
Heat transfer enhancement in shell and tube heat exchanger. Fe 3 o 4 nanoparticles with diameters of 1520 nm dispersed in water with volume concentrations of 0. The heat exchanger consists of tube with a narrow slot oriented in the. Design and development of shell and tube heat exchanger for. Graphite heat exchangers and components annulargroove condenser nbhbkb cgmp annulargroove condenser nbgmp hbgmp annulargroove vent condenser gngh annulargroove. Pdf nanotechnology is a promising field in sustainable energy to reduce the energy consumption for optimum design of heat exchangers. Shell and tube heat exchanger was used to compare turbulent heat transfer performance of two types of nanofluids, al 2 o 3 and tio 2 with water as base fluids 9.
Bench top apparatus with a control and instrument unit for studies into the principles and performance of heat exchangers. Heat transfer enhancement by using zno water nanofluid in. Numerical analysis of fe3o4 nanofluid flow in a double pipe u. Heat transfer in crossflow heat exchangers for application. The author found that the effectiveness of the heat exchanger increased from 74. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. Typical nanoparticles are made of metals, oxides or. Applications of nanofluid for heat transfer enhancement explores recent progress in computational fluid dynamic and nonlinear science and its applications to nanofluid flow and. In the plate heat exchanger the heat transfer coefficient of nanofluid at mm cold hot 10gs is about 20% higher. Feb 28, 2011 in the forced flow systems the coolant is pumped through the pipes of a heat exchanger, introducing convective heat transfer mechanisms and pumping power penalties. Pdf application of nanofluid in heat exchangers for. Cfd study for cross flow heat exchanger with integral. Calculation of heat transfer coefficient of mwcnttio2.
Analysis of heat transfer enhancement of heat exchanger. The laminar convective heat transfer behavior of cuo nanoparticle dispersions in glycol with the average particle sizes about 70 nm was investigated experimentally in a flow loop with. Application of nanofluids in heat transfer 415 where eff is the effective viscosity of nanofluid, bf is the base fluid viscosity, and is the volume fraction of the suspended particles. Nguyen experimentally investigated the heat transfer in phe and reported an enhancement in the heat transfer rates 7, pantzali et al also studied the effects using cuo nano fluids in the similar apparatus, both experimentally and numerically, and confirmed the later mentioned behavior 8. Tan and fok 2006 developed an educational computer aided design tool for shell and tube heat exchanger that integrates thermo hydraulics analysis with mechanical design. In this work a model of finned tube heat exchanger was made and by using ansys fluent and used al2o3 nanofluid as cooant for heat transfer enhancement.
Chapter 2 literature survey this chapter provides an overview of the literature on the works carried out in the analysis of heat exchangers, shell and tube heat exchanger, compact. The nanofluids are considered to be new generation fluids characterized by better heat transfer capabilities over traditional heat transfer fluids. The main focus of using nanofluid is that it has high thermal conductivity than base fluid like water, ethylene glycol, etc. Preparation of nanofluid basically there are two ways of preparing nanofluid. The water temperatures at the inlet of test tube were 50, 60, 70, 80 c. Heat exchangers are commonly used in practice in a wide variety of applications, from air conditioning systems in a house to power production applications in large plants a. Computational fluid dynamics and heat transfer analysis. Engineering nanofluids for heat transfer applications. Cfd analysis on double pipe heat exchanger using fe 3 o 4 nano fluid g. Choi 1995 quantitatively analyzed some potential benefits of nanofluids for augmenting heat transfer and reducing size, weight and cost of thermal apparatuses, while. The normal maximum operating temperature for a plate heat exchanger is approximately 120 degrees celsius. Heat transfer enhancement in shell and tube heat exchanger by. Morteza ghanbarpour, nader nikkam, rahmatollah khodabandeh, muhammet s. The use of nanofluid in place of traditional working fluid in heat exchanger increases the heat transfer rate in a significant manner.
Introduction car radiator, one example of compact heat exchanger, is an important part in. This paper investigates the enhancement of heat transfer coefficient and nusselt number of a nanofluid containing nanoparticles. Pdf application of nanofluid in heat exchangers for energy savings. The apparatus consists of a test section heat exchanger, two tanks, two magnetic gear pumps, and a pump for transporting nanofluid as the hot fluid and the other for the cold water. Heat transfer characteristics of shell and tube heat exchanger. Graphite heat exchangers provide excellent corrosion resistance to a wide variety of ch. Effectiveness and overall heat transfer coefficient o. Secondly, this paper defines graphene nanofluids as beneficiary fluids, the heat.
Compared to the existing techniques for enhancing heat transfer, the nanofluids show the superior potential of increasing heat transfer rates in a variety of application cases. Heat exchanger theory the study of heat and heat transfer has a long history. A heat exchanger is a device that is used for thermal energy exchange. Experimental apparatus used in this study is depicted in figure 1. Heat transfer characteristics in double tube helical heat. Effects of temperature and concentration of nanoparticles on nusselt number changes and heat transfer coefficient in a double. Heat transfer of iron oxide nanofluid in a double pipe heat. Heat and moisture exchanger artificial nose used in conjunction with tracheostomy tubes description a heat moisture exchanger is used for members with a tracheostomy tube with or without a ventilator to partly restore the important respiratory function of the nose. The equipment allows students to quickly assess heat transfer rates by forced convection. Heat exchanger thermalhydraulic design procedures top in involve exchanger rating quantitative heat transfer and pressure drop evaluationandor exchanger sizing.
Forced convective heat transfer studies have been carried out in an agitated shell and helical coil heat exchanger using cuowater nanofluid. Numerical analysis of fe3o4 nanofluid flow in a double. Their thermophysical measurements of the nanofluid cuo in water, 4 vol% reveal that the increase in thermal conductivity is accompanied by a significant drop in heat capacity and an increase in viscosity. Experimental analysis of heat transfer rate in corrugated. A study of heat transfer with nanofluids sanjyot varade, chinmay patil and s. Numerous investigations have been made for decades to enhance heat transfer 3. Pdf a nanofluid is a mixture of nano sized particles of size up to 100 nm and a base fluid. Pdf cfd analysis on finned tube heat exchanger using alumina.
Analysis of heat transfer enhancement of heat exchanger using. The heat transfer coefficient of nanofluids was approximately 26% greater than that of pure water and the results also showed that the heat transfer coefficient of the nanofluids at a volume concentration of 2. One of the barriers to increase the capacity of different industries is the lack of response of. Heat exchanger is vital from industry point of view having good efficiency and also having an economic running cost. The nanofluid is an emerging area of research and has lot of potential in heat transfer applications. Introduction a heat exchanger is the equipment built to efficiently transfer heat from one medium to. In their work the effect of the nanofluid on the heat exchanger performance was studied using cfd simulation and the cfd predictions compared to the experimental data.
Computational fluid dynamics and heat transfer simulations are conducted for a novel shelltube type heat exchanger. Aug 17, 2015 the heat exchanger will be supplied with oil, at 55o c 548. Study and analysis of concentric shell and double tube heat. Applications of nanofluid for heat transfer enhancement 1st. The performance is discussed in terms of heat transfer coefficient ratio. This results in an increase in ntu of the heat exchanger. The world wide researchers are making hard efforts to find out suitable alternatives for heat exchangers with different geometry and varying. Heat transfer enhancement by using zno water nanofluid in a. As the effect of using al2o3 nanofluid as a cooling medium in shell and tube heat exchanger on the. Higher temperatures may be reached with special gasket and adhesive. Fins attached to it enhance heat transfer from the hot coolant to the outside air. Cfd study for cross flow heat exchanger with integral finned tube.
Sarafraz and hormozi 2 found heat transfer enhancement of 67% at 1. Only two important relationships constitute the entire thermal design. Heat transfer characteristics of shell and tube heat exchanger free download as powerpoint presentation. Operating any plate heat exchanger at temperatures above the design temperature of the gasket material will result in gasket and adhesive failure. Effectiveness and overall heat transfer coefficient o water. Daily life examples of heat exchanger the various examples of heat exchangers from our daily life are 1. Later, brinkman 1952 presented a viscosity correlation eq. Heat exchanger nominal size 56 with threaded connection, tube stack length 370 and clamp with feet. Efficiencies of various liquid coolants depend on the fluid properties and the flow mode laminar or turbulent and can be estimated from the fluid dynamics equations 16. The experiments are conducted in the heat exchanger for different concentrations of nanoparticles and reynolds numbers.
Cuowater 4% nanofluid has been used as a working fluid in the heat exchanger. Typical microreactor and crossflow heat exchanger geometric configuration 2. Heat transfer of nanofluids in a shell and tube heat exchanger. Forced convection in a heat exchanger transfers the heat from one moving stream to another stream through the wall of the pipe. In the forced flow systems the coolant is pumped through the pipes of a heat exchanger, introducing convective heat transfer mechanisms and pumping power penalties. Application of nanofluids in heat transfer intechopen. Numerous investigations have been made for decades to. The cooler fluid removes heat from the hotter fluid as it flows along or across it. Cfd, cross flow, heat exchanger, integral fin, heat transfer coefficient. Heat transfer enhancement using cuo water nanofluid in a shell. Heat transfer of iron oxide nanofluid in a double pipe.
Heat transfer enhancement in shell and tube heat exchanger by using iron oxide nanofluid 1sunny rach,2pratik patel 3dr. Numerical analysis, heat exchanger, heat transfer, friction factor, enhancement. To enhance heat exchange under high temperature condition and get the more accurate data, we try to improve the traditional experimental apparatus which is used to test nanofluid heat. Experimental research on heat transfer characteristics of. The filter captures heat and moisture from the expired air and during. Heat exchanger is simply a device which transfers heat from hot medium to cold medium with maximum rate.
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