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. Full text of heat exchanger thermal design of oil system. The relation for heat capacity for nanofluid was proposed by xuan and roetzel 11 and the values were calculated by using this equation. We believe that the present design approach is a useful for compression oil system cooling design. Designing and application of a shell and tube heat exchanger. Rayleigh number, temperature of the nanofluid, diameter and type of the nanoparticles on the heat transfer performance of nanofluids are examined. Investigation of a counter flow microchannel heat exchanger. Introduction heat exchangers play an increasingly important role in the field of energy conservation. The al 2 o 3 nanoparticles of about 30 nm diameter.
Heat transfer enhancement in shell and tube heat exchanger by. The experimental sample was al 2 o 3 water nanofluid produced by the direct synthesis method at three different concentrations 0. Shell and tube heat exchanger, nanofluid, heat transfer, performance i. The need for better efficient heat exchanging system is required for new technological and industrial development. A nanofluid is a fluid containing nanometer sized particles, called nanoparticles. In the present paper, the heat transfer and fluid flow characteristics of a coppermade heat exchanger were experimentally studied. Secondly, this paper defines graphene nanofluids as beneficiary fluids, the heat. Heat transfer enhancement with al 2 o 3 nanofluid in shell and tube heat exchanger using twisted tapes. A heat exchanger is a device that is used to transfer thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact. Heat transfer of nanofluid in a double pipe heat exchanger article pdf available in international scholarly research notices 2014 november 2014 with 1,220 reads how we measure reads. A schematic of the experimental setup used to investigate heat transfer characteristics of nanofluid in a mini heat exchanger is shown in fig. Heat transfer performance of a gasketed plate heat. 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. 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.
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. These nanoparticles, and structures and devices comprised of them, display unique mechanical, optical, electrical, and magnetic properties that differ radically from. Heat exchangers play an important role in different industrial processes. A compact heat exchanger is generally defined as one which incorporates a heat transfer surface having a high area density. 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.
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. Analysis of heat transfer enhancement of heat exchanger using. One of the barriers to increase the capacity of different industries is the lack of response of. By the above stated results the following conclusions are made. Rayleigh number, temperature of the nanofluid, diameter and type of the nanoparticles on the. Applications of nanofluid for heat transfer enhancement.
Applications of nanofluid for heat transfer enhancement 1st. Designing and application of a shell and tube heat. Effectiveness and overall heat transfer coefficient o. Here in this special case the heat exchangers behaviour is independent of the flow arrangement of heat exchanger. Assessment of thermoelectric module with nanofluid heat. 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 finned tube, investigate the effect of. 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 nanofluid in a double pipe heat exchanger article pdf available in international scholarly research notices 2014 november 2014. A reduction in energy consumption is possible by enhancing. Discrete phase model has been worked for the inspection by using cfd software fluent 14. In this paper, an appraisal of thermal augmentation of thermoelectric module using nanofluidbased heat exchanger is presented. Introduction suspensions of solid submicron and nanometersized particles in various fluids also called nanofluids have been considered for applications as advanced heat transfer fluids for. Heat transfer of nanofluid in a double pipe heat exchanger. Full text of effect of mgo nanofluid on heat transfer. Heat transfer enhancement in fe3o4water nanofluid through a. The nanoparticles used in nanofluids are typically made of metals, oxides, carbides, or carbon nanotubes. The lmtd method assumes that both inlet and outlet temperatures are known. The analysis is performed for different richardson numbers ri 0. In this study, the energy differences between heat loss by nanofluid and heat gain by cooling water is maximum 3% which mainly due to heat loss through the wall of geyser, inlet tubing to heat exchanger, outlet tubing from heat exchanger, radiation heat loss and heat loss through the nanofluid reservoir. Thermal and hydraulic performance of a heat exchanger.
Engineering nanofluids for heat transfer applications diva. The test section is a counter current double pipe heat exchanger with the length of 120 cm. Jun 12, 2019 in the present paper, the heat transfer and fluid flow characteristics of a coppermade heat exchanger were experimentally studied. Mass flow rate on tube side was varied while on the shell side it was kept constant. Review of literature on heat transfer enhancement in heat. Q f ua i where, the factor f is a correction factor, and the log mean temperature deference is based upon the counter. Research article heat transfer of nanofluid in a double. Experimental and numerical analysis of a nanofluidic.
Nov 23, 2017 so, the goal of this research was to introduce nanofluid technology for thermal processing of food products, increasing heat transfer efficiency in shell and tube exchangers by nanofluids and frugality in energy consumption for pasteurization, reducing thermal processing duration and better quality retention of food products. The convective heat transfer coefficient of fe 3 o 4 water nanofluid for flow through the internally finned tube and plain tube is evaluated under the turbulent flow conditions for the volume concentrations of 0. The results indicate that the convective heat transfer coefficient of the nanofluid is higher than the. Improving heat transfer is a critical subject for energy conservation systems which directly affects economic efficiency of these systems. Effect of particle size on the convective heat transfer in nanofluid by anoop et al. The al 2 o 3 nanoparticles of about 30 nm diameter are used in the. Pdf heat transfer augmentation in heat exchanger using. The term heat exchanger applies to all equipment used to transfer heat between two streams. Heat transfer through heat exchanger using al2o3 nanofluid.
The computational fluid dynamic code is used to simulated different concentrations of nanofluid. Tube side pr number of heat exchanger using nanofluid was decreased by 11% compared to that of basefluid. Effectiveness and overall heat transfer coefficient o water. Khairul presentedthe thermodynamic second law analysis of a helical coil heat exchanger using three different types of nanofluids e. Journal of nanofluids american scinetific publishers. The heat transfer values were measured in the turbulent flow of a nanofluid containing 20 nm aluminum oxide suspended particles with the volume. The two flow loops carried heated nanofluid and the other cooling.
Keywordsnanofluid, mechanical vibration, heat transfer augmentation, gasketed plate heat exchanger. This paper investigates the enhancement of heat transfer coefficient and nusselt number of a nanofluid containing nanoparticles. Analysis of heat exchanger with nanofluids raman chouda department of thermal engineering prestige institute of engineering and science, indore, india. Experimental investigation of plate heat exchanger using. There are active and passive methods which can be employed to enhance the rate of heat transfer without reducing the general efficiency of the energy conservation systems. Apr 06, 2014 nanofluids are a new class of advanced heattransfer fluids engineered by dispersing nanoparticles smaller than 100 nm in diameter in conventional heat transfer fluids. Combination of nanofluid and inserts for heat transfer. The volume fraction of nanofluid is varied between 0 to 2%. Walls of the enclosure are insulated and constant temperature conditions are given for hot t h and cold t c pipes t h t c. Chevrontype, exergy loss, heat transfer coefficient, nanofluids, plate heat. Research article heat transfer of nanofluid in a double pipe. Heat transfer enhancement of cuo water nanofluid in a. Pdf heat transfer of nanofluid in a double pipe heat exchanger.
Pdf heat transfer enhancement with al2o3 nanofluid in shell. A heat exchanger is the equipment built to efficiently transfer heat from one medium to another without actually mixing the two. In case of both the heat exchanger as the concentration of nanoparticle in water increases it increases the heat transfer coefficient of the nanofluid. Amongst the three nanofluids, cuowater nanofluid, the heat transfer enhancement and reduction of entropy generation rate were obtained about 7. Investigation of a counter flow microchannel heat exchanger performance with using nanofluid as a coolant. It was observed that the convective and overall heat transfer coefficient increased with the application of nanofluids compared to ethylene glycol or water based. Pdf a nanofluid is a mixture of nano sized particles of size up to 100 nm and a base fluid. Thermal and hydraulic performance of a heat exchanger working.
Later, brinkman 1952 presented a viscosity correlation eq. The inside pipe is made of a soft copper tube with the inner diameter of 0. 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. Among these methods, passive techniques are more costeffective and reliable in. Research article heat transfer of nanofluid in a double pipe heat exchanger rezaaghayari, 1 heydarmaddah, 2 malihezarei, 1 mehdidehghani, 3 andsaharghanbarikaskarimahalle 4 department of chemical engineering, shahrood branch, islamic azad university, shahrood, iran. Thermal performance of shell and tube heat exchanger using pg. Pdf heat transfer enhancement with al2o3 nanofluid in. Nanoparticles can be produced from several processes such as gas condensation, mechanical attrition or chemical precipitation techniques. The overall heat transfer coefficient of heat exchanger using nanofluid was increased by 9% compared to that of basefluid. Heat transfer enhancement of cuo water nanofluid in a double. Engineering nanofluids for heat transfer applications.
A nanofluid is prepared by dispersing particles of. Compact heat exchanger the ratio of the heat transfer surface area of a heat exchanger to its volume is called the area density a heat exchanger with. Effects of temperature and concentration of nanoparticles on nusselt number changes and heat transfer coefficient in a double pipe heat exchanger with counter turbulent. Numerical study of heat transfer performance of nanofluids. A numerical study is conducted to examine natural convection heat transfer in a two dimensional heat exchanger filled with nanofluids. Methodology development the configuration of counter heat exchanger used in analysis is the lab based heat exchanger.
Evaluation of heat transfer mechanisms in heat pipe charged with. Typical nanoparticles are made of metals, oxides or. Currently, the rapid technology development has focused on the possible techniques of heat transfer enhancement in numerous engineering systems. The configuration of the heat exchanger was a double pipe and carbonwater nanofluid was utilised as a heatexchanging medium within the heat exchanger. Heat transfer enhancement with al2o3 nanofluid in shell. However, the term is commonly used to equipment in which two process streams exchange heat with each other. Heat transfer analysis of shell and tube heat exchanger.
Common base fluids include water, ethylene glycol and oil. 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. The relative importance of nanofluid parameters for heat transfer evaluated in this article allows engineering nanofluids with desired set of properties. The nanofluid is a colloidal solidliquid mixture obtained by the dispersing nanoparticles with a high heat transfer coefficient in the base fluid. Keywords zno nanofluid, heat transfer in nanofluid, concentric tube heat exchanger i. This study analyzes the characteristics of alumina al2 o3 water nanofluid to determine the feasibility of its application in an aircooled heat exchanger for heat dissipation for pemfc or electronic chip cooling.
Morteza ghanbarpour, nader nikkam, rahmatollah khodabandeh, muhammet s. Heat transfer analysis of shell and tube heat exchanger cooled using nanofluids volume. Effects of temperature and concentration of nanoparticles on nusselt number changes and heat transfer coefficient in a double pipe heat exchanger with counter. This article presents a numerical study of natural convection heat transfer in a heat exchanger filled with nanofluid. Pdf application of nanofluid in heat exchangers for. Department of mechanical engineering, college of engineering, thiqar university, nasiriyah, iraq. The aqueous medium must reach a certain temperature in order to obtain its oil extraction properties. The results indicate that the convective heat transfer coefficient of the nanofluid is. Muhammed and bjorn palm, thermal performance of screen mesh heat pipe.
It is an ideal and unique reference source for scientists and engineers working in this important and emerging research field of science, engineering and technology. The computational fluid dynamic code is used to simulated different concentrations of nanofluid 0. Analysis of heat transfer enhancement of heat exchanger. It consists of two flow loops, a heating unit to heat the nanofluid, and temperature measurement system. Late heat exchangers phes are broadly used in numerous engineering applications. Heat transfer enhancement by using zno water nanofluid in. Heat exchanger specification, nanofluid properties and mathematical formulations were taken from the literature to analyze thermal and energy performance of the heat recovery system. Performance evaluation on an aircooled heat exchanger for. Nanofluids are a new class of advanced heattransfer fluids engineered by dispersing nanoparticles smaller than 100 nm in diameter in conventional heat transfer fluids. Introduction particles of size range 1100 nm are considered nanoscale. This study aims to enhance the heat transfer characteristics for heat exchanger with use of nanofluid as a working substance. Al 2 o 3 with a particle size of 20 nm and volume fraction of 0.
Heat transfer enhancement of cuowater nanofluid in a double tube heat exchanger ali kia 1, mohsen ekhlasnia 1,ahmad zolfaghari 2, 1hakhamanesh moghadam,sadeg afrasiabi 1,reza aghayari 3, mahshid pourali 4 and heydar maddah 5. The numerical results reveal the enhancement in heat transfer, with respect to the base fluid, identified to characterize nanofluid. The opening chapters explain governing equations and then move on to discussions of free and forced convection heat transfers of nanofluids. In this study, we carry out a numerical analysis of flow dynamics, heat transfer, and entropy generation inside a heat exchanger. Numerical study of heat transfer performance of nanofluids in. A nanofluid is a fluid containing nanometersized particles, called nanoparticles. Research article heat transfer of nanofluid in a double pipe heat exchanger rezaaghayari, 1 heydarmaddah, 2 malihezarei, 1 mehdidehghani, 3 andsaharghanbarikaskarimahalle 4 department of chemical engineering, shahrood branch, islamic azad university, shahrood, iran department of chemistry, sciences faculty, arak branch, islamic azad.
Nanofluid provides significant improvement of thermophysical properties and augmentation of heat transfer coefficients as well as reduces the. These fluids are engineered colloidal suspensions of nanoparticles in a base fluid. Application of nanofluids in heat transfer intechopen. Heat transfer through heat exchanger using al2o3 nanofluid at. This study investigates experimentally the thermal performance of propylene glycolwater with a concentration of 1090 % and al2o3water nanofluid with a volume concentration of 0. Thermal performance of shell and tube heat exchanger using. So, the goal of this research was to introduce nanofluid technology for thermal processing of food products, increasing heat transfer efficiency in shell and tube exchangers by nanofluids and frugality in energy consumption for pasteurization, reducing thermal processing duration and better quality retention of food products. Pdf application of nanofluid in heat exchangers for energy savings. This study analyzes the characteristics of alumina al 2 o 3water nanofluid to determine the feasibility of its application in an aircooled heat exchanger for heat dissipation for pemfc or electronic chip cooling.
Toprak, experimental study of nanofluid effect on thermal performance of screen mesh heat pipe, proceedings of the uk heat transfer conference ukhtc20, 20, 981 988 5. Pdf effect of nanofluid on heat transfer characteristics of double. The system under consideration uses commercially available thermoelectric module, 27nm al 2 o 3 h 2 o nanofluid, and a heat source to replicate the chip. Heat transfer analysis of a shell and tube heat exchanger was carried out experimentally using zinc oxide as a nanofluid.
1461 69 670 320 504 1367 1033 102 850 866 1054 1364 251 1491 335 187 343 924 1270 1112 366 1100 332 1201 1052 633 1207 1287 592 1269 273 1070 1092 1514 631 21 357 722 309 1178 1044 4 853 957 1008