In this work, a numerical study has been done to analyse the flow and heat transfer of magnetohydrodynamics sisko nanofluid over a stretching sheet in. 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. In case of both the heat exchanger as the concentration of nanoparticle in water increases it increases the heat transfer coefficient of the nanofluid. This is due to the highest thermal transport capacity of dm in nature. For fluid flows in a concentric tube heat exchanger, the heat transfer rate of the hot fluid nanofluid al 2 o 3 in the inner tube can be expressed as where is the mass flow rate of the nanofluid hot fluid and and are the outlet and inlet temperatures of the nanofluid hot fluid, respectively. Effects of cooling process of al2o3 water nanofluid on. The heated test section was made of copper tube of 1200 mm length and 4. Investigation of a counter flow microchannel heat exchanger. 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. Numerical study of fluid dynamic and heat transfer in a. Pdf effect of nanofluid on heat transfer characteristics of double. The convective heat transfer performance for cuo and tio 2based nanofluids was measured flowing in the tube side in shell and tube heat exchanger. Applications of nanofluid for heat transfer enhancement.
Typical nanoparticles are made of metals, oxides or carbides, while base fluids may be water, ethylene glycol or oil. In the current tutorial, the nano fluid is flowing inside a compact pipe. Toprak, mamoun muhammed and bjorn palm, cooling performance of nanofluids in a small diameter tube, experimental thermal and fluid science, 20, 49. Application of nanofluids for the optimal design of shell and tube. Pdf application of nanofluid in heat exchangers for energy savings. When considered together with our viscosity measurement on the same fluids, we find that the only the cntbased nanofluids. Nanofluid provides significant improvement of thermophysical properties and augmentation of heat transfer coefficients as well as reduces the. 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. It was observed that the specific heat capacity is enhanced by doping with the nanotubes in both solid and liquid phase. The cold water based nanofluids flow in tube side and water as hot fluid flows on shell side. Apr 06, 2014 an ideal coolant should possess higher value of specific heat which enable the coolant to remove more heat.
The heat transfer enhancement using nanofluid mainly depends on type. Nanofluid convection in microtubes journal of heat transfer. Introduction heat typical heat exchangers experienced by us in our daily lives include condensers and evaporators used in air conditioning. Pdf mhd flow of sisko nanofluid over a stretching sheet. Nanofluid on heat transfer characteristics for circular finned tube heat exchanger dr. Heat transfer analysis of nanofluid in a sine wave plate heat. Engineering nanofluids for heat transfer applications iv other work not included in this thesis. Pdf a nanofluid is a mixture of nano sized particles of size up to 100 nm and a base fluid.
Analysis of the influence of viscosity and thermal. 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. A simple and economical process for synthesis of silverwater nanofluid is proposed and the nanofluid is examined to determine how variations in its volume flow rate and concentration, in the range of 010 mgl, affect the overall heat transfer coefficient of a cr1445 comer plate heat exchanger phe and thermal characteristics of the nanofluid. The shell and tube heat exchanger is of stainless steel type 316 l, 248 mm long consisting of 37 tubes.
Heat transfer and performance analysis of nanofluid flow in. It is found that convective heat transfer coefficient of cuwater, aiwater, ah03. Nanofluid flows in inner copper tube while hot water flows in annular. This site is like a library, use search box in the widget to get ebook that you want. Engineering nanofluids for heat transfer applications. Nanofluids for heat transfer applications download ebook. Use of nanofluid is one of simple way to attain this purpose. Experimental study of nanofluid effects on heat transfer in closed. Jul 07, 2010 sample data include an effective convection coefficient increase of 5% for 3 vol % al 2 o 3 di water nanofluid.
Heat transfer enhancement in fe3o4water nanofluid through a. Thermal conductivity, viscosity, and density of the nanofluids were increased, but the specific heat of the nanofluids was decreased with increasing the concentrations of the particles. To study the entire cfmche numerically it is complicated and needs huge of cpu time. The term heat exchanger applies to all equipment used to transfer heat between two streams. The study includes designing and manufacturing of test section from pyrex glass with dimensions 250 500 1200 mm width, height and length, respectively. Nanofluid is a solidliquid mixture in which metallic or nonmetallic nanoparticles are suspended in the base fluid. In shell and tube heat exchanger sthx, heat is exchanged between hot water coming from industrial outlet by forced convection to the cold water. However, the term is commonly used to equipment in which two process streams exchange heat with each other. Click download or read online button to get nanofluids for heat transfer applications book now.
They stated that heat transfer coefficient increased about 12% at 4vol. Each flow loop includes a pump with a flow meter, a reservoir and a bypass valve to maintain the required flow rate. The two flow loops carries heated nanofluid or distilled water and the other cooling water. 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. To achieve high heat transfer rate in heat exchanger is our main concern. Experimental investigation of plate heat exchanger using. 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 of iron oxide nanofluid in a double pipe. In addition, the enhancements of the specific heat capacity are increased with increase of the cnt concentration. Many researchers have investigated the heat transfer performance and flow characteristics of various nanofluids with different nanoparticles and base fluid. Nanofluids can be produced by either one step or two steps methods.
Pdf heat transfer of nanofluid in a double pipe heat exchanger. Download nanofluids for heat transfer applications or read online books in pdf, epub, tuebl, and mobi format. Nanofluids are colloidal suspensions of nano sized particles in the conventional base fluid such as water, engine oil and ethylene glycol. In the case studied in this paper, over 185% increase in tube side heat transfer coefficient allows reduction of heat exchanger length and flow velocity and thereby. A schematic of the experimental setup used to investigate heat transfer characteristics of nanofluid in a mini heat exchanger is shown in fig. Nanofluids are the new generation heat transfer fluids for various industrial and automotive applications because of their excellent thermal. 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. 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. 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 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. By the above stated results the following conclusions are made. Use of nanoparticles in water based nanofluid as coolant in shell and tube heat exchanger.
Application of al2o3 nanofluid for enhance heat transfer rate in. Investigation of a counter flow microchannel heat exchanger performance with using nanofluid as a coolant. The computational fluid dynamic code is used to simulated different concentrations of nanofluid 0. Introduction heat exchangers play an increasingly important role in the field of energy conservation. Heat transfer of nanofluid in a double pipe heat exchanger. Heat transfer through heat exchanger using al2o3 nanofluid. Effectiveness and overall heat transfer coefficient o water. The results revealed that the nanofluid gave a higher heat transfer coefficient than the base liquid and the nanofluid with a 36 nm particle diameter gave higher heat transfer coefficient compared to the nanofluid with a 47 nm particle diameter. This study is about the performance evaluation of a shell and tube heat exchanger operated with nanofluid.
Heat transfer enhancement with al2o3 nanofluid in shell and. Darcyforchheimer mhd hybrid nanofluid flow and heat. Heat transfer enhancement in shell and tube heat exchanger by. Darcyforchheimer mhd hybrid nanofluid flow and heat transfer analysis over a porous stretching cylinder author anwar saeed, asifa tassaddiq, arshad khan, muhammad jawad, wejdan deebani, zahir shah and saeed islam. Heat transfer applications of tio2 nanofluids intechopen. Proceedings of the asme 2012 heat transfer summer conference collocated with the asme 2012 fluids engineering division summer meeting and the asme 2012 10th international conference on nanochannels, microchannels, and minichannels. The heat transfer values were measured in the turbulent flow of a nanofluid containing 20 nm aluminum oxide suspended particles with the volume.
The effect of nanofluid to enhance the heat transfer rate in various heat exchangers is experimentally evaluated recently. The egbase nanofluid containing dm has the highest heat transfer coefficient value followed by sio 2 and cu. All journal articles featured in heat transfer engineering vol 41 issue 910. 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. Therefore, the presence of dm nanoparticles in eg could greatly enhance the cooling of compact heat exchanger compared with other types of nanofluids.
Numerical investigation of nanofluid particle migration and convective heat transfer in microchannels using an eulerianlagrangian approach volume 878 omar z. Typical nanoparticles are made of metals, oxides or. Application of nanofluids in heat transfer intechopen. Haghighi, mohsin saleemi, nader nikkam, rahmatollah khodabandeh, muhammet s.
Performance evaluation of a shell and tube heat exchanger. It consists of two flow loops, a heating unit to heat the nanofluid, and temperature measurement system. Nanofluid provides significant improvement of thermophysical. Shell and tube heat exchanger, nanofluid, heat transfer, performance i. Analysis of heat transfer enhancement of heat exchanger using. Schematic structure of the studied counter flow mi crochannel heat exchanger with square channels is shown in. 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. Numerical investigation of nanofluid particle migration and. The al2o3 and water nanofluid has been taken as the working fluid, there is a constant heat flux on the pipe wall. Pdf application of nanofluid in heat exchangers for. On the specific heat capacity enhancement in nanofluids. Heat transfer through heat exchanger using al2o3 nanofluid at. This project is to enhance the heat transfer rate of shell and tube heat exchanger in temperature process station by using al2o3 nanofluid and ethylene. Full text of effect of mgo nanofluid on heat transfer.
Heat transfer analysis of shell and tube heat exchanger. Effect of particle size on the convective heat transfer in nanofluid by anoop et al. Ansys fluent tutorial nanofluid flow and heat transfer. Heat transfer enhancement with al 2 o 3 nanofluid in shell and tube heat exchanger using twisted tapes. Experimental investigation of nanofluid heat transfer in a. Discrete phase model has been worked for the inspection by using cfd software fluent 14.
High cost of nanofluids higher production cost of nanofluids is among the reasons that may hinder the application of nanofluids in industry. Heat transfer, nanofluid, viscosity, thermal conductivity. Heat exchangers have its major application in automobile, air condition, refrigerator, power plants, and many others. Heat transfer characteristics and performance of copper spiral heat exchanger are investigated and compared with pure water. The results reveal that heat transfer by al 2o 3water nanofluid is enhanced only when the temperature exceeds 40c and the size does not exceed a certain diameter limit of the order of 4550 nm depending on temperature. The two flow loops carried heated nanofluid and the other cooling. Department of mechanical engineering, college of engineering, thiqar university, nasiriyah, iraq. Session bt44 heat transfer in mini heat exchanger using. Experimental investigation of nanofluid heat transfer in a plate heat exchanger.