The shell and tube heat exchanger is of stainless steel type 316 l, 248 mm long consisting of 37 tubes. Investigation of a counter flow microchannel heat exchanger performance with using nanofluid as a coolant. This paper investigates the enhancement of heat transfer coefficient and nusselt number of a nanofluid containing nanoparticles. Session bt44 heat transfer in mini heat exchanger using. The test section is a counter current double pipe heat exchanger with the length of 120 cm. Combined enhancement techniques on double tube heat exchanger. It consists of two flow loops, one for al2o3 nanofluid i.
Nanofluids for heat transfer applications download ebook. Numerical study of heat transfer enhancement for laminar. Friction factor of water and nanofluid is heat exchanger. Pdf heat transfer of nanofluid in a double pipe heat exchanger. In addition, the enhancements of the specific heat capacity are increased with increase of the cnt concentration. A b s t r a c t this paper describes preparation of zinc oxide zno based nanofluids in polymer matrix. Al 2 o 3 with a particle size of 20 nm and volume fraction of 0. 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. The measurement of nanofluid critical heat flux chf in a forced convection loop is useful for the nuclear applications. Therefore, the presence of dm nanoparticles in eg could greatly enhance the cooling of compact heat exchanger compared with other types of nanofluids. On the specific heat capacity enhancement in nanofluids. Experimental investigation of heat transfer enhancement of shell. 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.
Heat transfer correlations are developed for the flow of nanofluids in conventional straight tube and straight. The al 2 o 3 nanoparticles of about 30 nm diameter. Nanofluid on heat transfer characteristics for circular finned tube heat exchanger dr. 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. Pdf heat transfer enhancement with al2o3 nanofluid in. 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. Engineering nanofluids for heat transfer applications. The combination of nanoparticles and water is called a nanofluid. The experimental setup consisted of double tube heat exchanger with nanofluids on the cold side was used in turbulent regime with reynolds number ranging. Heat transfer enhancement by using nanofluid in spiral. Heat exchanger biomedicine other applications heat pipes, fuel cell, solar water heating.
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. 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. 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. Nanofluid flows in inner copper tube while hot water flows in annular. Applications of nanofluid for heat transfer enhancement. Numerical investigation of nanofluid particle migration and. This study aims to enhance the heat transfer characteristics for heat exchanger with use of nanofluid as a working substance. Each flow loop includes a pump with a flow meter, a reservoir and a bypass valve to maintain the required flow rate. Introduction of nanoparticles to the fluid affects all of thermophysical properties and should be accounted for in the nanofluid evaluations 18,19. The inlet and outlet parts of heat exchanger were equipped with four k type thermocouples. This site is like a library, use search box in the widget to get ebook that you want. Chevrontype, exergy loss, heat transfer coefficient, nanofluids, plate heat. Pdf heat transfer augmentation in heat exchanger using. Experimental study of heat transfer enhancement using nanofluid in.
The cold fluid connection is taken from the cold fluid tank and inlet pipe is connected to the periphery of the. In manual mode of operation the temperature control is made by built in opamp. A flow regulating valve is provided at the hot fluid inlet of the heat exchanger. It was observed that the specific heat capacity is enhanced by doping with the nanotubes in both solid and liquid phase. 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. To study the entire cfmche numerically it is complicated and needs huge of cpu time. Apr 06, 2014 an ideal coolant should possess higher value of specific heat which enable the coolant to remove more heat. Application of nanofluids in heat transfer intechopen. Heat transfer and performance analysis of nanofluid flow in. The two flow loops carried heated nanofluid and the other cooling.
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 al2o3 nanofluid for enhance heat transfer rate in. In this investigation, the performance of the shell and tube heat exchanger operated with tin nanoparticleswater sno2w and. Introduction nanofluids are a relatively new class of fluids which consist of a. Review on heat transfer enhancement using nanofluids in. Nanofluid heat transfer enhancement for nuclear reactor. 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. 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. Sample data include an effective convection coefficient increase of 5% for 3 vol % al 2 o 3 di water nanofluid. A schematic of the experimental setup used to investigate heat transfer characteristics of nanofluid in a mini heat exchanger is shown in fig.
Drastic change in the properties of the base fluid, by. Heat exchanger is a device, which transfers the heat from hot fluid to cold fluid, by direct or indirect contact. Heat transfer characteristics of the heat exchanger with helical coil are also studied by jayakumar et al. Pdf heat transfer enhancement of nanofluid researchgate. Investigation of a counter flow microchannel heat exchanger.
Heat transfer characteristics and performance of copper spiral heat exchanger are investigated and compared with pure water. 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. Heat transfer of nanofluid in a double pipe heat exchanger article pdf available in international scholarly research notices 2014 november 2014. There are several means to increase heat transfer by increasing surface area, increasing turbulence, etc.
Heat transfer enhancement of cuo water nanofluid in a. If the heat exchanger operates under laminar conditions, the. 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. Nanofluid convection in microtubes journal of heat transfer. However, the term is commonly used to equipment in which two process streams exchange heat with each other. In the present work heat transfer experiments were carried out on a number of nanofluids. 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. The study includes designing and manufacturing of test section from pyrex glass with dimensions 250 500 1200 mm width, height and length, respectively. Full text of effect of mgo nanofluid on heat transfer. The two flow loops carries heated nanofluid or distilled water and the other cooling water. Schematic structure of the studied counter flow mi crochannel heat exchanger with square channels is shown in. A heat exchanger was fabricated, and hot and cold aluminawater nanofluid was pumped into the hot and cold inlets of the heat exchanger. Study of zinc oxide nanofluids for heat transfer application department of applied chemistry, defence institute of advanced technology, deemed university, india a r t i c l e i n f o keywords.
Nanofluid convection in microtubes journal of heat. Haghighi, mohsin saleemi, nader nikkam, rahmatollah khodabandeh, muhammet s. 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. This keynote presentation will survey the work done at mit on nanofluid coolants for nuclear power applications. Combined enhancement techniques on double tube heat. Heat transfer enhancement with al2o3 nanofluid in shell and. The cold water based nanofluids flow in tube side and water as hot fluid flows on shell side. Effect of heat transfer enhancement and no emission using. Analysis of heat transfer enhancement of heat exchanger. Use of nanofluid is one of simple way to attain this purpose. 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.
Secondly, this paper defines graphene nanofluids as beneficiary fluids, the heat. Counter flow heat exchangers are the most efficient of the three types. 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. The temperature of the nanofluid exiting the outlet of the.
This is due to the highest thermal transport capacity of dm in nature. Review article heat exchanger using nano fluid prof. It consists of two flow loops, a heating unit to heat the nanofluid, and temperature measurement system. Analysis of heat transfer enhancement of heat exchanger using. Numerical study of fluid dynamic and heat transfer in a. Nanofluids can be produced by either one step or two steps methods. Numerical investigation of nanofluid particle migration and convective heat transfer in microchannels using an eulerianlagrangian approach volume 878 omar z. Experimental study of exergetic performance of al 2 o 3 nanofluid in a double.
However, they are ultimately limited by the innate thermal conductivity of the fluid. Engineering nanofluids for heat transfer applications ii list of papers included in the thesis. 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. Heat transfer applications of tio2 nanofluids intechopen. Experimental investigation of plate heat exchanger using. The opening chapters explain governing equations and then move on to discussions of free and forced convection heat transfers of nanofluids. 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. Introduction heat exchangers play an increasingly important role in the field of energy conservation. Numerical investigation of nanofluid particle migration. Engineering nanofluids for heat transfer applications iv other work not included in this thesis. Effects of temperature and concentration of nanoparticles on nusselt number changes and heat transfer coefficient in a double pipe heat exchanger with counter turbulent. The hotwire apparatus is used to measure the thermal conductivity of nanofluids with suspended copper nanophase powders. 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. 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.
A reduction in energy consumption is possible by enhancing. Effectiveness and overall heat transfer coefficient o. 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. Thus it is better to increase the thermal conduction behavior of the nanofluid itself. Effects of cooling process of al2o3 water nanofluid on. The inside pipe is made of a soft copper tube with the inner diameter of 0.
Heat transfer enhancement in shell and tube heat exchanger by. Click download or read online button to get nanofluids for heat transfer applications book now. In contrast to the parallel flow heat exchanger, the counter flow heat exchanger can have the hottest coldfluid temperature greater than the coldest hotfluid temperatue. Jul 07, 2010 sample data include an effective convection coefficient increase of 5% for 3 vol % al 2 o 3 di water nanofluid. The heat transfer values were measured in the turbulent flow of a nanofluid containing 20 nm aluminum oxide suspended particles with the volume. Effects of temperature and concentration of nanoparticles on nusselt number changes and heat transfer coefficient in a double pipe heat exchanger with counter. In case of both the heat exchanger as the concentration of nanoparticle in water increases it increases the heat transfer coefficient of the nanofluid. Department of mechanical engineering, college of engineering, thiqar university, nasiriyah, iraq. Heat transfer enhancement by using nanofluid in spiral plate heat exchanger. Comparison of the heat transfer efficiency of nanofluids aidic. In shell and tube heat exchanger sthx, heat is exchanged between hot water coming from industrial outlet by forced convection to the cold water. Future heat transfer studies can be performed with metallic nanoparticles with different geometries and. By the above stated results the following conclusions are made. 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.
Download nanofluids for heat transfer applications or read online books in pdf, epub, tuebl, and mobi format. Heat transfer enhancement in fe3o4water nanofluid through a. When considered together with our viscosity measurement on the same fluids, we find that the only the cntbased nanofluids. 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. Effect of heat transfer enhancement and nox emission using al2o3water nanofluid as coolant in ci engine m rajaa. 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 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. Use of nanoparticles in water based nanofluid as coolant in shell and tube heat exchanger. Heat transfer characteristics in double tube helical heat. The graphene nanofluid has been used in the tube side of the heat exchanger to enhance its heat transfer performance. Pdf this paper investigates the enhancement of heat transfer coefficient and nusselt number of a nanofluid containing nanoparticles. Short communication open access study of zinc oxide. Heat exchanger specification, nanofluid properties and mathematical formulations were taken from the literature to analyze thermal and energy performance of the heat recovery system.
Study on oil fouling in a double pipe heat exchanger with mitigation by a surfactant. They stated that heat transfer coefficient increased about 12% at 4vol. Heat transfer analysis of nanofluid in a sine wave 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. Heat exchangers are widely used in industrial processes for heat transfer, like cooling of oil, refrigeration and air. The computational fluid dynamic code is used to simulated different concentrations of nanofluid. Introduction heat typical heat exchangers experienced by us in our daily lives include condensers and evaporators used in air conditioning. However, this paper elaborates the thermal performance of nanofluids in plate heat. Heat transfer enhancement with al 2 o 3 nanofluid in shell and tube heat exchanger using twisted tapes. Heat transfer through heat exchanger using al2o3 nanofluid at. Effectiveness and overall heat transfer coefficient o water. 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. The term heat exchanger applies to all equipment used to transfer heat between two streams. Toprak, mamoun muhammed and bjorn palm, cooling performance of nanofluids in a small diameter tube, experimental thermal and fluid science, 20, 49.
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 achieve high heat transfer rate in heat exchanger is our main concern. The egbase nanofluid containing dm has the highest heat transfer coefficient value followed by sio 2 and cu. 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. Heat transfer through heat exchanger using al2o3 nanofluid. It was observed that the convective and overall heat transfer coefficient increased with the application of nanofluids compared to ethylene glycol or water based. Heat transfer analysis of shell and tube heat exchanger. An introduction to the nanofluid by amin behzadmehr hassan azarkish. Heat transfer of nanofluid in a double pipe heat exchanger.
142 542 862 616 704 363 461 1095 93 932 277 655 532 970 446 1580 447 1572 1273 985 1495 570 85 60 1478 442 55 216 1378