Jahar Sarkar

Jahar Sarkar
Indian Institute of Technology (BHU) Varanasi

PhD (Mechanical Engineering)

About

209
Publications
95,430
Reads
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6,219
Citations
Citations since 2016
106 Research Items
4931 Citations
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201620172018201920202021202202004006008001,000
201620172018201920202021202202004006008001,000
Introduction
Published about 150 research articles. Global rank is 67 in Mechanical Engineering, published by Elsevier.
Education
June 2002 - September 2005

Publications

Publications (209)
Article
The polymer–particle matrix structure has attracted great interest for daytime radiative cooling due to its various advantages; however, cost-effective fabrication process development and proper material selection are crucial tasks. Herein, we illustrate the selection of fabrication process and materials based on development, characterization, and...
Article
The performance of an ejector refrigeration cycle can be improved by recovering expansion energy from condenser to evaporator using an additional two-phase ejector, but yet to be explored. Hence, two novel solar-driven ejector refrigeration systems are investigated on the basis of energy, exergy, economy and environmental aspects. The investigated...
Article
In an open-loop heat pump dryer, moisture removal in the evaporator is not profitable for an arid climate and hence evaporator may be used for comfort cooling, which leads to an efficient integrated system yielding both heat pump drying and air conditioning with a single energy source. Hence, the present experimental analysis is focused on the desi...
Article
The turbulent flow of binary hybrid nano-oils is being investigated and Nusselt number correlation is developed for futuristic concentrated solar thermal application. Available Nusselt number correlations of water-based hybrid nanofluids are nanoparticle-specific (not general), property correlations dependent and substantially over-predict the valu...
Article
The regenerative evaporative cooler is experimentally investigated in this study and the predictive machine learning model is developed based on the test data to predict the energy and exergy performances of the device. This statistical machine learning framework is used to study the effect of six input operating variables (air inlet temperature, i...
Article
The ambient condition varies drastically in the composite climate and the direct evaporative cooling is effective in the dry months; whereas, the regenerative evaporative cooling is effective in the humid months. Hence, seasonal change of the cooling device is needed for effective cooling. In this situation, a dual-mode evaporative cooler (a two-in...
Article
Current research proposes and investigates a novel small-scale solar-driven sustainable combined desalination, heating and power (CDHP) system for a house in cold remote locations and hill stations. Latent heat storage integrated evacuated tube solar collector, organic Rankine's cycle, active solar still and water heater are main subsystems of the...
Article
Passive radiative cooling, which creates a direct in-situ cooling effect, along with a natural refrigerant-based vapor compression system, could be a potential alternative for building air conditioning to reduce the heat island effect and global warming. Hence, the radiative cooler is integrated with transcritical CO2 air conditioner as a sub-coole...
Article
A solar-assisted heat pump dryer is fabricated for intermittent drying. The experiment is performed for different intermittency ratios for radish drying using future refrigerant R1234yf. The effects of total drying time (on-period + off-period) on various energetic, exergetic, and economic performances are investigated. Radish chips were dried to e...
Article
The conventional desert cooler is effective for dry seasons and the regenerative evaporative cooler (REC) is an effective device for humid seasons in composite climate zones. Hence, the dual-mode evaporative cooler (a two-in-one device) is an intelligent choice for air conditioning, which can operate in both direct and regenerative modes depending...
Article
The increase in energy demand for water cooling in nearby future encourages the use of metamaterial-based passive radiative water cooler, which has application potential in a highly-populated country like India. However, an energy-exergy-economic feasibility study with the best tube design is essential before implementation due to climatic diversit...
Article
Thermo-hydraulic behavior of the ribbed minichannel heat sink, having nine rectangular-shaped channels, is numerically investigated in the present study by using a multi-phase mixture model. Four different types of ribs (semi-circular, rectangular, triangular and trapezoidal ribs) and two hybrid nanofluids (Al2O3 + TiO2/DI water and Al2O3 + Cu/DI w...
Article
A comparative experimental study to examine the hydrothermal behaviors of the double tube heat exchanger with various modified twisted tape and wire coil inserts is performed using Al2O3+MWCNT hybrid nanofluid. The investigation is performed for Reynolds number of 8000–40000, nanofluid flow rate of 5–25 lpm and volume concentration of 0.01%. The ef...
Article
The recent energy demand for cooling increases rapidly, which forced researchers to think about the technological shift. Evaporative cooling is an eco-friendly option, uses much less energy. Direct evaporative coolers are used worldwide and effective for arid climates. Regenerative evaporative coolers can cool up to dew point without adding moistur...
Article
Climate change is expected to have a significant impact on device usability in different regions. Hence, it is necessary to study its impact on the performance of evaporative cooling, which is an alternative cooling technology to reduce increasing energy demand and carbon footprint. This study focuses on exploring the usefulness of the dual-mode ev...
Article
An experimental investigation in mini channel heat sink has been performed to assess the thermal-hydraulic behavior of composite dispersed hybrid nanofluid. Reduced graphene oxide-Zinc oxide (rGO-ZnO) nanocomposite particles have been synthesized and dispersed in water to prepare hybrid nanofluid with 0.01% volume concentration. Effects of differen...
Article
It is necessary to investigate the relative effect of various phenomena before neglecting the same for simulating the single-phase natural circulation loop to obtain an acceptable prediction. Hence, the present study focuses on the validation and effect of different assumptions related to Boussinesq approximation, property variation, bend effect, h...
Article
The ejector refrigeration cycle has gained special interest due to its simplicity and hence can be a good choice as a subcooling device for the transcritical CO2 refrigeration system for performance improvement, which is an emerging research field. Hence, the aim of this study is the proposal and comparison of various ejector refrigeration‐based de...
Article
The experimental studies with a new type of enhancer, conical wire coil insertion in the concentric tube heat exchanger using water-based mono (Al2O3 and CNT) and hybrid (Al2O3 + CNT) nanofluids, flowing in the inner tube, are conducted to examine the effect on thermohydraulic performance. The thermohydraulic performances are studied with various c...
Article
The rising demand for electricity (energy) to cool the conditioning space leads to the searching for alternate, emission-free and sustainable technologies. The regenerative evaporating coolers are proved to be energy-efficient and eco-friendly devices for a wide range of climatic conditions. The better performance of these devices leads to a signif...
Article
Transient and steady‐state characteristics of the natural circulation loop are studied using various water‐based tri‐hybrid (different nature and shaped nanoparticles) nanofluids. Effects of input power, loop inclination and loop aspect ratio on the mass flow rate, effectiveness and entropy generation rate are studied. Results disclose that tri‐hyb...
Article
Full-text available
Passive radiative cooling is an emerging field and needs further development of material. Hence, the computational approach needs to establish for effective metamaterial design before fabrication. The finite difference time domain (FDTD) method is a promising numerical strategy to study electromagnetic interaction with the material. Here, we simula...
Article
Steady-state and transient behaviours of single-phase natural circulation loop (SPNCL) are investigated using four thermal oils (Therminol VP1, Paratherm CR, Dowtherm A and Dowtherm Q) and water-based ternary hybrid (various combinations of different nature and shaped nanoparticles: Al2O3, Cu, CNT and Graphene) nanofluids as loop fluid. The influen...
Article
A novel solar-driven compact and sustainable combined cooling, heating and power system is proposed to fulfill the energy demands of small buildings at remote locations and exergy, economic and environmental assessments are carried out. This system consists of evacuated tube collectors coupled with thermal energy storage, organic Rankine cycle, eje...
Article
The regenerative evaporative cooling has emerged as efficient, cost-effective and eco-friendly technology for low and medium humid climates. The performance improvement of the regenerative evaporative cooler leads to the reduction of energy consumption in view of increasing cooling demand, which can be achieved by optimizing the design (active meth...
Article
In the long future, dependency on conventional air conditioning systems for thermal comfort certainly needs to be reduced, with alternate strategies like passive photonic radiative cooling. Recent metamaterial development with highly reflective in the solar spectrum pushes the radiative cooling technique toward application assessment. In this paper...
Article
There are many solar thermal applications in the medium temperature range of 373 – 573 K. These systems rely heavily on heat transfer fluids. Proper strategy and heat transfer correlation are required for selecting heat transfer fluids. Hence, a consistent, non-dimensional figure of merit is proposed for heat transfer fluids, like synthetic oils, w...
Article
Passive radiative sub-ambient cooling is an emerging field of futuristic research and development and has the potential to reduce water and electricity demands, and the negative environmental effects of conventional cooling systems. Nighttime radiative passive cooling was achieved even long before, and daytime passive radiative cooling has gained r...
Article
The convective closed-loop solar-assisted heat pump dryer (batch type) has been designed, fabricated and experimentally investigated for both simple heat pump drying (HPD) and solar-assisted heat pump drying (SAHPD) modes. The banana chips have been dried up to moisture content of 11.5% for both modes. The next-generation environmental-friendly ref...
Article
In the present study, a novel compact size convective batch-type solar-infrared assisted heat pump dryer is developed and experimentally investigated for closed air cycle drying of banana chips. Performances of four different operational modes of the system, simple heat pump drying, infrared-assisted heat pump drying, solar-assisted heat pump dryin...
Article
Full-text available
Energetic and exergetic analyses of the plate heat exchanger are experimentally performed using Al2O3–TiO2 hybrid nanofluid as a coolant for sub-ambient temperature application to study the effect of nanoparticle volume ratio at various nanofluid flow rates ranging 2.0–4.0 lpm and inlet temperatures ranging 10–25 °C. The Al2O3–TiO2 hybrid nanofluid...
Article
Novel waste heat recovery‐assisted heat pump dryer is designed, developed, and experimented in different operating modes. Energy, exergy, economic, and exergoeconomic parameters of the dryer with and without waste heat recovery are experimentally compared. Radish chips are dried to remove moisture from 93.5% to 10.5% at fixed dryer inlet air veloci...
Article
An experimental investigation is conducted with graphene–Al2O3 hybrid nanofluid as a coolant in corrugated surface plate heat exchanger to study energetic performance. The combinations studied are Al2O3–graphene in 4:1 nanoparticle ratio and 100% Al2O3 nanoparticle with 0.01 v % concentration in DI water. Effect of coolant flow rates (2.0–4.0 lpm)...
Article
Passive photonic radiative cooling is used to make sky exposed surfaces sub-ambient with recent development in metamaterials throughout the day and night cycle. Daytime radiative cooling depends on the intensity of solar radiation, and both daytime and nighttime radiative cooling have a function of environmental factors like ambient temperature, hu...
Article
Impact of using V-cuts twisted tape insert and phase change material (PCM) dispersed mono or hybrid nanofluid on the hydrothermal characteristics of the double tube heat exchanger is experimentally investigated. Water-based Al2O3 and PCM nanofluids and Al2O3+ PCM hybrid nanofluid with different concentrations are used in inner tube. Influences of v...
Article
Full-text available
Batch‐type heat pump dryer operating in both closed and open‐cycle modes with improved tray design is developed to investigate the energetic and exergetic performances, and drying kinetics of banana and potato chips. Effects of drying time on various performances and drying kinetic parameters are presented. Coefficient of performance of heat pump a...
Article
Due to the increase in cooling load globally, it needs to find an efficient, environment-friendly and sustainable cooling technology. The regenerative evaporative cooler is a better option in this direction. The regenerative evaporative cooler can be possible in different configurations depending on the primary air, secondary air and water flow dir...
Article
Indirect evaporative cooling may be the eco-friendly substitute of the conventional high energy-consuming vapor compression cooling technology, and regenerative evaporative cooling is an advancement of this to achieve below-wet bulb temperature cooling. Based on the primary air, secondary air and water flow directions, various design configurations...
Article
In the present study, a batch-type solar-assisted heat pump dryer (SAHPD) has been developed and experimented in both simple heat pump dryer (HPD) and SAHPD modes for closed system drying of banana chips. The effect of drying time on various energy, exergy, economic and exergoeconomic performance parameters has been investigated. The banana chips h...
Article
Tapered wire coil insert is proposed as a novel enhancer in the double tube heat exchanger and experimental studies on Al2O3 + MgO hybrid nanofluid flowing under the turbulent condition are performed to investigate the hydrothermal characteristics. Effects of using tapered wire coil turbulator and hybrid nanofluid on the hydrothermal behaviors are...
Article
The experimental studies on Al2O3 + TiO2 hybrid nanofluid flowing under the turbulent condition in a double-tube heat exchanger with various modified V-cuts twisted tape inserts are performed to study the hydrothermal characteristics. The hybrid nanofluid is prepared with a volume concentration of 0.1% by dispersing Al2O3 and TiO2 nanoparticles by...
Article
In the present research work, three novel topologies (Configuration-1, Configuration-2 and Configuration-3) of solar energy driven combined cooling, heating and power (CCHP) system are proposed to identify eco-friendly system for future energy demand and human comfort. The proposed CCHP systems consist of solar thermal evacuated U-tube collector, o...
Article
The effect of the particle mixture ratio in hybrid nanofluid on minichannel heat sink performance is analyzed experimentally. The heat sink, made of aluminium, contains nine parallel rectangular minichannels having cross section of 1 mm × 3 mm with 30 mm length. Total 0.01% volume concentration of Al2O3 and MWCNT nanoparticles for various mixing ra...
Article
Transient analysis of vertical heating and horizontal cooling rectangular single-phase natural circulation loop with various water-based hybrid nanofluids (Al2O3 + Ag, Al2O3 + Cu, Al2O3 + TiO2, Al2O3 + CNT, Al2O3 + Graphene) with 1% volumetric concentration is studied numerically. Temporal fluctuation and time required to attain the steady-state, t...
Conference Paper
The present study is focused on the one dimensional directional and transient simulation of the batch type convective drying chamber for agricultural products. In the present study, the numerical investigation of the variation in properties of drying air and performance parameters with time and the distance are considered. The numerical simulation...
Conference Paper
Applications like milk processing and drying demand a medium temperature in the range of 100 to 300OC. Generally, process steam or an alternative heat source based on high grade energy is utilized for such purposes. Therefore, the use of freely available solar energy is encouraged to save fuel and mitigate the generation of greenhouse gases. One su...
Conference Paper
In the present work, various thermal oils and glycols (Therminol VP-1, Paratherm-CR, Dowtherm Q, Dowtherm A, Ethylene glycol and Propylene glycol) based hybrid nanofluids have been used as working fluid in single phase natural circulation loop (SPNCL) applicable for heating temperature range of 100-200oC. Considered fluids are compared based on per...
Conference Paper
The fluid flow and heat transfer in mini/microchannels have emerged as an important research area due to increasing demand for energy density removal from small space volume. In the present study, heat transfer and pressure drop characteristics of a minichannel heat sink are analyzed experimentally by using different hybrid nanofluids. Minichannel...
Conference Paper
Numerical simulations have been performed to study the indirect mode operation of dual mode, combined parallel-counter flow regenerative evaporative cooler. The proposed device is described and explained with the help of a diagram. Parametric Analysis of the combined parallel and counter flow evaporative cooler has been assessed for geometrical (ch...
Conference Paper
In this paper, the effect of V-cut twisted tape inserts on heat transfer and friction factor characteristics in a double pipe heat exchanger have been experimentally investigated for three twist ratios (TR = 5, 10 and 15), different combinations of depth and width ratios (DR=1/2, WR=1/2; DR=1/3, WR=1/2; DR=1/2, WR=1/3) and inlet temperatures (50oC,...
Article
Brines (ethylene glycol, calcium chloride, propylene glycol and potassium acetate)-based hybrid (combinations of alumina, copper oxide, silica and titania with copper nanoparticles) nanofluids have been used as a secondary refrigerant to improve the heat transfer characteristics of the plate evaporator for milk chilling. Effect of nanoparticle comb...
Article
Hydrothermal and energy-economic performances of minichannel heat sink are experimentally compared by using water-based different nanoparticle-dispersed mono and hybrid nanofluids. Al2O3, AlN, CNT, Cu and capric acid as phase change material (PCM) are considered. Different nanoparticles combinations (oxide–PCM, oxide–nitride, oxide–carbon nanotube...
Article
Full-text available
Three climatic zones (composite, hot-dry, hot-humid) cover most of the regions in India. Direct evaporative cooler is suitable for dry and indirect regenerative evaporative cooler is suitable for humid months. To avoid the use of two different coolers for the same purpose during the composite climate (significant seasonal variations of temperature...
Article
The hydrothermal characteristics of minichannel heat sink are analyzed experimentally by using deionized (DI) water based different nanoparticles mixture dispersed hybrid nanofluids. Al2O3, MgO, SiC, AlN, MWCNT and Cu nanoparticles are considered for this study. Different nanoparticles combinations (oxide-oxide, oxide-carbide, oxide-nitride, oxide-...
Article
Interesting hydrothermal behavior of hybrid nanofluid containing combination of dissimilar particles (completely different in terms of shape, size and properties) by changing their ratio is unexplored yet, which is analyzed experimentally for minichannel heat sink. Nine parallel rectangular minichannels are used in the heat sink each of which has 1...
Article
To enhance the energetic and exergetic performances of the counter-flow plate heat exchanger with corrugations, several experiments were conducted using different Al2O3 hybrid nanofluids as a coolant. The combinations studied were Al2O3–SiC, Al2O3–AlN, Al2O3–MgO, Al2O3–CuO and Al2O3–MWCNT in 4:1 nanoparticle volume ratio and 100% Al2O3 with 0.1 vol...
Article
To quantify the fostering in energetic and exergetic performances of counter flow corrugated plate heat exchanger, several experiments were conducted using Al2O3–MWCNT hybrid nanofluids as coolant. The Al2O3–MWCNT hybrid nanofluids with different nanoparticle volume ratios (5:0, 4:1, 3:2, 2:3, 1:4 and 0:5) and 0.01 v% concentration were used as a c...
Article
Both mono and hybrid nanofluids, the engineered colloidal mixture made of base fluid and nanoparticles, have shown many interesting properties and becoming a high potential next generation heat transfer fluid in various heat exchangers for engineering applications. The present review focuses on improving the performance of tubular heat exchangers b...
Conference Paper
Heat transfer and pressure drop characteristics of a minichannel heat sink have been experimentally investigated by using Al2O3-graphene (50/50 v/v) hybrid nanofluid with 0.001% volume concentration. Heat sink consists of 10 parallel rectangular minichannels having 3 mm depth and 0.8 mm width. Effects of Reynolds number (90 < Re < 500) and inlet fl...
Article
The simulation of batch type open cycle heat pump dryer has been performed to study the system performances and food quality using promising low GWP refrigerants (R290, R600a, R32, R152a and R1234yf) as a substitute of R134a for carrot and banana drying. The experimentation with heat pump dryer test facility using R134a has been performed for model...
Article
Energy and exergy performances of natural circulation loop (NCL) with various water-based hybrid nanofluids (Al2O3 + TiO2, Al2O3 + CNT, Al2O3 + Ag, Al2O3 + Cu, Al2O3 + CuO, Al2O3 + graphene) with 1% volumetric concentration are compared in this study. New thermophysical property models have been proposed for hybrid nanofluids with different particl...
Article
A batch-type open cycle heat pump dryer has been numerically simulated to study the energy and exergy performances using various low-GWP refrigerants (R290, R600, R600a, R32, R152a, R1234yf, R1234ze(E)) as a substitute of R134a. Effects of air inlet conditions, drying time, and material moisture content on the coefficient of performance, moisture e...
Article
Heat transfer and pressure drop characteristics of minichannel heat sink are analysed experimentally and numerically (two-phase mixture model) by using hybrid nanofluids. Minichannel heat sink consists of 9 parallel rectangular shaped minichannels having depth of 3 mm and width of 1 mm. The Al2O3–TiO2 hybrid nanofluid with nanoparticles volume conc...
Article
Nanocomposite is a nanotechnology-based multiphase, high-performance composite material having combination of properties, which has been emerged as one of the promising research and development activities. Recently, nanocomposites have shown significant application opportunities for several sectors of biotechnology, engineering, and medical science...
Article
In this study, three novel biomass gasification based tetra-generation systems for syngas, heating, cooling and power generations have been proposed and theoretically assessed for selected biomass materials. The systems, instead of using the chemical energy of the gasification products, use the thermal energy to operate both Rankine and Refrigerati...
Article
Theoretical study on the energetic and exegetic performances of counter-flow corrugated plate heat exchanger using hybrid nanofluids for the milk chilling application has been done in the present investigation. Magnesia- silver and Alumina- silver nanoparticles have been dispersed in the ethylene glycol-water mixture and propylene glycol-water mixt...
Conference Paper
Evaporative cooling is the oldest and simplest type of sustainable cooling technology. Direct evaporative cooler is widely used in hot and dry conditions but it becomes ineffective in wet outdoor condition. Regenerative indirect evaporative coolers have disadvantage of low cooling capacity for the same dry air mass flow rate. This paper presents a...
Article
The energy, exergy and economic assessments of a shell and tube condenser of 580 MW nuclear power plant have been carried out using different water-based hybrid nanofluids such as Al2O3 + MWCNT, Al2O3 + Ag, Al2O3 + Cu and Al2O3 + TiO2 as coolant. The effect of nanoparticle concentration on reductions of coolant requirement, pumping power and operat...
Article
Nanofluid cooled mini-micro channel heat sink has become a pleasant alternative for electronics and thermal applications recently due to its compactness and enhanced heat transfer characteristics. In the present study, a numerical simulation on laminar forced convection flow of DI water based Al2O3 nanofluid and Al2O3-MWCNT hybrid nanofluid in mini...
Article
In the present study, numerical as well as experimental investigations have been done on the plate heat exchanger using hybrid nanofluid (Al2O3 + MWCNT/water) at different concentration to investigate its effect on heat transfer and pressure drop characteristics. Discrete phase model has been used for the investigation using CFD software and result...
Article
A generalized methodology for pinch point design and optimization of subcritical and transcritical organic Rankine cycles (ORCs) using both wet and dry fluids is adopted in this study. The presented algorithm can predict the pinch point location in evaporator and condenser simultaneously and optimize the evaporator pressure for best performance wit...
Article
A new pinch point design methodology for subcritical organic Rankine cycle (ORC) is proposed to predict pinch point locations in both evaporator and condenser, and optimise working fluid mass flow rate to get maximum heat recovery and exergetic efficiency for given heat source and heat sink conditions. Selected working fluids have been compared bas...
Article
Energy and economic analyses of corrugated plate evaporator have been performed in this study by using brine-based hybrid nanofluids as secondary refrigerant for low temperature applications (milk chilling, ice making and fish freezing). Various hybrid nanofluids containing alumina with different nanoparticles (copper, silver and multi walled carbo...
Article
This study deals with the theoretical enhancement of thermal performance using water‐based (50/50) volume fraction of Fe2O3, CuO, TiO2, Ag, Cu in Al2O3 hybrid nanofluids as coolants for a louvered fin automobile radiator. The effects on thermophysical properties and various performance parameters, i.e., heat transfer, effectiveness, and pumping pow...
Article
Novel methodology for pinch point design and optimization of subcritical and supercritical organic Rankine cycles is proposed for maximum heat recovery. The proposed method is able to predict pinch point locations in both evaporator and condenser simultaneously. As a main advantage, both evaporator and condenser pressures can be optimized simultane...
Article
In view of energy security and environmental concern, the performance of refrigeration system needs to be improved, which can be done by modifying either the systems or the properties of primary and secondary working fluids. Recently, the nanofluids or hybrid nanofluids have gained interest in many engineering fields due to its excellent thermophys...
Article
In the present study, an attempt is made to prepare a general guideline to compare and select the suitable working fluids for organic Rankine cycle based on their basic properties without going through rigorous numerical or experimental study. Theoretical study on organic Rankine cycle for two low grade sensible heat sources is conducted to study t...
Article
Full-text available
Present study deals with the enhancement of convective heat transfer performance of EG brine based various hybrid nanofluids i.e. Ag, Cu, SiC, CuO and TiO2 in 0–1% volume fraction of Al2O3 nanofluid, as coolants for louvered fin automobile radiator. The effects of nanoparticles combination and operating parameters on thermo physical properties, hea...
Article
A novel process model has been proposed for biomass gasification integrated with combined heat and power generation using various biomass, which have been selected based on availability in abundant quantities from different regions of India. In the proposed system, high thermal energy carried out by gasification products has been utilized to operat...
Article
Thermal performance of Shell and Tube Heat Exchanger condenser of Rankine power cycle, the thermodynamic cycle of electricity generation plants using steamturbines, operated withhybrid nanofluids (Al2O3-Cu/water) (50%-50%) has been analytically investigated. Hybrid nanofluid thermophysical properties (density, specific heat, viscosity, and thermal...
Conference Paper
Thermal performance of Shell and Tube Heat Exchanger condenser of Rankine power cycle, the thermodynamic cycle of electricity generation plants using steam turbines, operated with hybrid nanofluids (Al2O3-Cu/water) (50%-50%) has been analytically investigated. Hybrid nanofluid thermophysical properties (density, specific heat, viscosity, and therma...
Article
The present study focuses on the energetic and exergetic analyses of rectangular fin and flat tube automotive radiator using water, EG, PG and their brines. Effects of various operating parameters on heat transfer rate, effectiveness, pumping power, performance index as well as entropy generation, entropy generation number, irreversibility and seco...
Conference Paper
With increasing computing speed and development in electronic technology emphasis should be on making devices smaller, faster and more reliable in quality. This advancement leads to the increment in heat generation; proper heat dissipation is needed from these products in order to keep them in their desired designation and for proper functionality....
Conference Paper
An enhancement in the performance of heat exchangers is must to tackle the problem of energy crisis. For this one can opt for better heat exchangers with modulated surfaces and can also enhance the properties of working fluid. In present paper an effort has been made to improve and analyze the performance of heat exchanger by using corrugated type...
Conference Paper
Thermal performance of Shell and Tube Heat Exchanger condenser of Rankine power cycle, the thermodynamic cycle of electricity generation plants using steam turbines, operated with hybrid nanofluids (Al2O3-Cu/water) (50%-50%) has been analytically investigated. Hybrid nanofluid thermophysical properties (density, specific heat, viscosity, and therma...
Conference Paper
In the present study, optimum propylene glycol (PG) brine based nanofluids are being proposed as coolants for wavy finned automotive radiator. Performance and exergy analyses are conducted and compared with conventional Propylene Glycol (PG) brine and related nanofluids. 25% PG brine has similar heat transfer characteristics with water, but higher...