Combined enhancement techniques on double tube heat exchanger. Effect of heat transfer enhancement and nox emission using al2o3water nanofluid as coolant in ci engine m rajaa. Instead of water, if nano fluids are used into these tubes, then there is a possibility of improved heat transfer because of high thermal conductivity of the nanofluids. Heat transfer applications of tio2 nanofluids intechopen. An introduction to the nanofluid by amin behzadmehr hassan azarkish. Applications of nanofluid for heat transfer enhancement. Friction factor of water and nanofluid is heat exchanger.
Chevrontype, exergy loss, heat transfer coefficient, nanofluids, plate heat. The thermofluid characteristics of al 2 o 3 water nanofluid in the annulus of doublehelical coiled tubes were experimentally and numerically carried out. A heat exchanger was fabricated, and hot and cold aluminawater nanofluid was pumped into the hot and cold inlets of the heat exchanger. Short communication open access study of zinc oxide. Numerical study of fluid dynamic and heat transfer in a. Review on heat transfer enhancement using nanofluids in. Nanofluid on heat transfer characteristics for circular finned tube heat exchanger dr. The shell and tube heat exchanger is of stainless steel type 316 l, 248 mm long consisting of 37 tubes.
A b s t r a c t this paper describes preparation of zinc oxide zno based nanofluids in polymer matrix. Heat transfer of nanofluid in a double pipe heat exchanger article pdf available in international scholarly research notices 2014 november 2014 with 1,199 reads how we measure reads. To study the entire cfmche numerically it is complicated and needs huge of cpu time. The effectiveness of the heat exchanger, defined as the ratio 232 of actual heat transfer to the maximum heat transfer possible, is calculated using eq. Nanofluid flows in inner copper tube while hot water flows in annular. Investigation of a counter flow microchannel heat exchanger. Experiment is carried out for water based sio 2 nanofluid with 15 nm average sized nanoparticle at varying air velocity and mass flow rate of fluid to investigate its. Nanofluids for heat transfer applications download ebook. A schematic of the experimental setup used to investigate heat transfer characteristics of nanofluid in a mini heat exchanger is shown in fig. Experimental investigation of plate heat exchanger using. Pdf heat transfer of nanofluid in a double pipe heat exchanger. Heat transfer through heat exchanger using al2o3 nanofluid at. By the above stated results the following conclusions are made. Engineering nanofluids for heat transfer applications iv other work not included in this thesis.
The computational fluid dynamic code is used to simulated different concentrations of nanofluid. 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. The hotwire apparatus is used to measure the thermal conductivity of nanofluids with suspended copper nanophase powders. Effectiveness and overall heat transfer coefficient o. However, the term is commonly used to equipment in which two process streams exchange heat with each other. Heat exchangers are widely used in industrial processes for heat transfer, like cooling of oil, refrigeration and air.
Numerical investigation of nanofluid particle migration and. Engineering nanofluids for heat transfer applications ii list of papers included in the thesis. Heat transfer enhancement with al2o3 nanofluid in shell and. Heat transfer and performance analysis of nanofluid flow. Combined enhancement techniques on double tube heat. However, they are ultimately limited by the innate thermal conductivity of the fluid. Design the test loop cross flow heat exchanger to obtain the flow and heat transfer characteristics, manufacture conformal test section from pyrex with low integral finned tube, investigate the effect of using mgo nanofluid instead of hot water on heat transfer characteristics for integral low finned tube, study the average surface. The results of the investigation shows an enhancement in the performance parameter of the heat exchanger namely heat transfer coefficient friction factor with an increase in volume concentration of the nanofluid. The two flow loops carried heated nanofluid and the other cooling. The temperature of the nanofluid exiting the outlet of the. The main aim of this study is to carry out research on the heat transfer characteristics of plate heat exchanger with different orientations using al2o3 nanofluids.
Nanofluid heat transfer enhancement for nuclear reactor. Experimental study of heat transfer enhancement using nanofluid in. Al 2 o 3 with a particle size of 20 nm and volume fraction of 0. Click download or read online button to get nanofluids for heat transfer applications book now. The scope design the test loop cross flow heat exchanger to obtain the flow and heat transfer characteristics, manufacture conformal test section from pyrex with low integral. This is due to the highest thermal transport capacity of dm in nature.
In the present work heat transfer experiments were carried out on a number of nanofluids. The al 2 o 3 nanoparticles of about 30 nm diameter. The opening chapters explain governing equations and then move on to discussions of free and forced convection heat transfers of nanofluids. Heat transfer enhancement in fe3o4water nanofluid through a. Due to the limitation of fossil fuels, shortage of energy, optimization of energy consumption in various industrial processes becomes very important and challenging issue all over the world. Heat transfer characteristics and performance of copper spiral heat exchanger are investigated and compared with pure water. In this work found that the specification of a constant temperature or constant heat flux boundary condition for an actual heat exchanger does not yield proper modeling. Secondly, this paper defines graphene nanofluids as beneficiary fluids, the heat. The two flow loops carries heated nanofluid or distilled water and the other cooling water.
It consists of two flow loops, one for al2o3 nanofluid i. Numerical study of heat transfer enhancement for laminar. The inside pipe is made of a soft copper tube with the inner diameter of 0. Heat transfer through heat exchanger using al2o3 nanofluid. The test section is a counter current double pipe heat exchanger with the length of 120 cm. The cold fluid connection is taken from the cold fluid tank and inlet pipe is connected to the periphery of the. Application of nanofluids in heat transfer intechopen. The term heat exchanger applies to all equipment used to transfer heat between two streams. The inlet and outlet parts of heat exchanger were equipped with four k type thermocouples. There are several means to increase heat transfer by increasing surface area, increasing turbulence, etc. It was observed that the specific heat capacity is enhanced by doping with the nanotubes in both solid and liquid phase. Investigation of a counter flow microchannel heat exchanger performance with using nanofluid as a coolant. Nanofluid as a coolant has potential for use in the heat transfer field because of its augmentation in thermal properties that offers advantages in heat transfer. High cost of nanofluids higher production cost of nanofluids is among the reasons that may hinder the application of nanofluids in industry.
Heat transfer analysis of a shell and tube heat exchanger operated. Application of al2o3 nanofluid for enhance heat transfer rate in. Apr 06, 2014 an ideal coolant should possess higher value of specific heat which enable the coolant to remove more heat. Alpesh mehta 1, 2dinesh k tantia, 3nilesh m jha, 4nimit m patel address for correspondence 1 assistant professor, government engineering college, godhra 2,3,4 students of 7th semester mechanical government engineering college, godhra abstract. In addition, the enhancements of the specific heat capacity are increased with increase of the cnt concentration. In the plate heat exchanger the heat transfer coefficient of nanofluid at mm cold hot 10gs is about 20% higher than the base fluid and under the same conditions in the concentric heat exchanger is 14% higher than the base fluid. 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. The heat transfer values were measured in the turbulent flow of a nanofluid containing 20 nm aluminum oxide suspended particles with the volume. Experimental investigation of heat transfer enhancement of shell. Nanofluid convection in microtubes journal of heat transfer. Introduction nanofluids are a relatively new class of fluids which consist of a. This article reports an experimental study on the forced convective heat transfer and flow characteristics of a nanofluid consisting of water and different volume concentrations of al 2 o 3 nanofluid 0. Each flow loop includes a pump with a flow meter, a reservoir and a bypass valve to maintain the required flow rate.
Effects of temperature and concentration of nanoparticles on nusselt number changes and heat transfer coefficient in a double pipe heat exchanger with counter. Haghighi, mohsin saleemi, nader nikkam, rahmatollah khodabandeh, muhammet s. In the first part of the paper 2, effect of al 2 o 3 nanofluid on heat transfer characteristics of double pipe heat exchanger has been. On the specific heat capacity enhancement in nanofluids. Pdf heat transfer enhancement with al2o3 nanofluid in. Drastic change in the properties of the base fluid, by. Effect of heat transfer enhancement and no emission using. Effects of cooling process of al2o3 water nanofluid on. The experimental setup consisted of double tube heat exchanger with nanofluids on the cold side was used in turbulent regime with reynolds number ranging. Analysis of heat transfer enhancement of heat exchanger using. Pdf heat transfer enhancement of nanofluid researchgate.
The heat transfer enhancement using nanofluid mainly depends on type of nanoparticles, size of nanoparticles, shape of nanoparticles, type of base fluid and concentration of nanoparticles in base fluid. The test section is the heat exchanger, in which nanofluid passes through 14 tubes with 7 mm inside diameter and 580 mm length, while the coolant flows through the shellside with a 101 mm inside diameter. Toprak, mamoun muhammed and bjorn palm, cooling performance of nanofluids in a small diameter tube, experimental thermal and fluid science, 20, 49. They stated that heat transfer coefficient increased about 12% at 4vol. The egbase nanofluid containing dm has the highest heat transfer coefficient value followed by sio 2 and cu.
This study investigated the heat transfer enhancement of the nanofluid containing aluminum oxide nanoparticles and water under the condition of turbulent flow in a double pipe heat exchanger. Department of mechanical engineering, college of engineering, thiqar university, nasiriyah, iraq. Numerical investigation of nanofluid particle migration and convective heat transfer in microchannels using an eulerianlagrangian approach volume 878 omar z. Schematic structure of the studied counter flow mi crochannel heat exchanger with square channels is shown in.
This study aims to enhance the heat transfer characteristics for heat exchanger with use of nanofluid as a working substance. It consists of two flow loops, a heating unit to heat the nanofluid, and temperature measurement system. The measurement of nanofluid critical heat flux chf in a forced convection loop is useful for the nuclear applications. This site is like a library, use search box in the widget to get ebook that you want.
The cold water based nanofluids flow in tube side and water as hot fluid flows on shell side. This paper investigates the enhancement of heat transfer coefficient and nusselt number of a nanofluid containing nanoparticles. The combination of nanoparticles and water is called a nanofluid. Future heat transfer studies can be performed with metallic nanoparticles with different geometries and. However, this paper elaborates the thermal performance of nanofluids in plate heat. If the heat exchanger operates under laminar conditions, the. Experimental study of exergetic performance of al 2 o 3 nanofluid in a double. Heat exchanger is a device, which transfers the heat from hot fluid to cold fluid, by direct or indirect contact. Heat exchanger biomedicine other applications heat pipes, fuel cell, solar water heating. Session bt44 heat transfer in mini heat exchanger using.
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. In this investigation, the performance of the shell and tube heat exchanger operated with tin nanoparticleswater sno2w and. Effectiveness and overall heat transfer coefficient o water. Heat transfer enhancement by using nanofluid in spiral. Use of nanoparticles in water based nanofluid as coolant in shell and tube heat exchanger. In manual mode of operation the temperature control is made by built in opamp. Study on oil fouling in a double pipe heat exchanger with mitigation by a surfactant. Heat exchanger specification, nanofluid properties and mathematical formulations were taken from the literature to analyze thermal and energy performance of the heat recovery system. Therefore, the presence of dm nanoparticles in eg could greatly enhance the cooling of compact heat exchanger compared with other types of nanofluids. Heat transfer enhancement of cuo water nanofluid in a.
Introduction of nanoparticles to the fluid affects all of thermophysical properties and should be accounted for in the nanofluid evaluations 18,19. Engineering nanofluids for heat transfer applications. Heat transfer and performance analysis of nanofluid flow in. Effects of temperature and concentration of nanoparticles on nusselt number changes and heat transfer coefficient in a double pipe heat exchanger with counter turbulent. Review article heat exchanger using nano fluid prof. Counter flow heat exchangers are the most efficient of the three types. Thus it is better to increase the thermal conduction behavior of the nanofluid itself. Heat transfer of nanofluid in a double pipe heat exchanger article pdf available in international scholarly research notices 2014 november 2014. Nanofluids can be produced by either one step or two steps methods. This keynote presentation will survey the work done at mit on nanofluid coolants for nuclear power applications.
In shell and tube heat exchanger sthx, heat is exchanged between hot water coming from industrial outlet by forced convection to the cold water. The study includes designing and manufacturing of test section from pyrex glass with dimensions 250 500 1200 mm width, height and length, respectively. Sample data include an effective convection coefficient increase of 5% for 3 vol % al 2 o 3 di water nanofluid. To achieve high heat transfer rate in heat exchanger is our main concern. Density and specific heat are proportional to the volume ratio of solid and liquid in the system, generally with density increasing and specific heat decreasing with addition of nanoparticles to the fluid. A flow regulating valve is provided at the hot fluid inlet of the heat exchanger. Download nanofluids for heat transfer applications or read online books in pdf, epub, tuebl, and mobi format. Heat transfer characteristics of the heat exchanger with helical coil are also studied by jayakumar et al. It was observed that the convective and overall heat transfer coefficient increased with the application of nanofluids compared to ethylene glycol or water based. Shell and tube heat exchanger, nanofluid, heat transfer, performance i. Nanofluid convection in microtubes journal of heat. Comparison of the heat transfer efficiency of nanofluids aidic.
Full text of effect of mgo nanofluid on heat transfer. Jul 07, 2010 sample data include an effective convection coefficient increase of 5% for 3 vol % al 2 o 3 di water nanofluid. Analysis of heat transfer enhancement of heat exchanger. Heat transfer analysis of shell and tube heat exchanger. The graphene nanofluid has been used in the tube side of the heat exchanger to enhance its heat transfer performance. 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. Heat transfer enhancement in shell and tube heat exchanger by. The purpose was to investigate the effect of combined enhancement techniques of nanofluid and helicoid tube shape on the performance of a double tube heat exchanger. Use of nanofluid is one of simple way to attain this purpose. The computational fluid dynamic code is used to simulated different concentrations of nanofluid 0. Heat transfer correlations are developed for the flow of nanofluids in conventional straight tube and straight.
In case of both the heat exchanger as the concentration of nanoparticle in water increases it increases the heat transfer coefficient of the nanofluid. Hemmat esfe and saedodin 5 estimated convective heat transfer coefficient of mgowater nanofluid flow in a double pipe heat exchanger at different particle concentrations 0. Heat transfer enhancement with al 2 o 3 nanofluid in shell and tube heat exchanger using twisted tapes. A reduction in energy consumption is possible by enhancing. The heat transfer coefficient of the nanofluid increased with an increase in the mass flow rate of the hot water and nanofluid, and increased with a decrease in the nanofluid temperature, and the temperature of the heating fluid had no significant effect on the heat transfer coefficient of the nanofluid. The average inside convection heat transfer coefficient of nanofluid as a function of reynolds number for different nanoparticle concentrations for plain tube heat exchanger is given in the fig. Alpesh mehta 1, 2dinesh k tantia, 3nilesh m jha, 4nimit m patel address for correspondence 1 assistant professor, government engineering college, godhra 2,3,4 students of 7th semester mechanical government engineering college, godhra. Pdf heat transfer augmentation in heat exchanger using. Pdf this paper investigates the enhancement of heat transfer coefficient and nusselt number of a nanofluid containing nanoparticles. Introduction heat typical heat exchangers experienced by us in our daily lives include condensers and evaporators used in air conditioning. Heat transfer characteristics in double tube helical heat. Numerical investigation of nanofluid particle migration. When considered together with our viscosity measurement on the same fluids, we find that the only the cntbased nanofluids.
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