An experimental study is presented in this paper to evaluate the enhancement of heat transfer characteristics. This includes a steady air jet impinging on planar aluminum plate with constant flux. Extensive industrial applications include electronic sinks, food industry, automobiles, and exchangers. The magnitude local Nusselt number along streamwise direction determined through detailed computation using infrared radiometry technique. range Reynolds was selected between 6500 ≤ Re 15000...

A numerical program is developed to solve two-dimensional continnum-based governing differential equations for liquid flow in axisymmetric circular microchannel geometry. The effects of variable thermal properties single-phase laminar forced convection with constant wall heat flux boundary conditions are studied. analysis fully behavior investigates the effect ρ(T), μ(T), and k(T) on friction characteristics isolation combination. For case heated water, μ(T) variation increases Nusselt...

Abstract This work deals with the analysis of forced convection in single-phase laminar flow liquid through microsized circular geometry a diameter 100 × 10−6 m. The problem hydrodynamically and thermally developing entrance region no-slip, no-temperature jump constant wall heat flux boundary condition is numerically studied. Two-dimensional (with axisymmetry) simulation carried out to understand effect fluid property variations on development transfer. Pure continuum-based governing...

A quantitative analysis of total radiation heat loss from a cavity receiver is numerically studied. Gaussian eliminations method used to solve the set radiosity equations estimate losses entire surface. The increases with increase in wall temperature, aspect ratio, and emissivity. For ratios (L/d) range 2–3, view factor all surfaces lower most suitable for design. mean model always overestimates overall effect emissivity may even 14% higher as compared cavity. not appropriate design large...

The present work aims to find out the effect of various parameters on evaporator, compressor and condenser in vapour compression cycle using "high performance tube manufacturer's software" for evaporator "compressor selection software a reputed manufacturer" compressor. includes number tubes, passes fouling factor saturated refrigerant temperature (SST), side velocity, pressure drop approach condenser. Effect SST power input compressor, cooling capacity, capacity coefficient (COP) also...

Computational study of heat transfer augmentation using air jet impingement is the most contemporary provocation in micro scale and electronic packaging systems. Since cooling sink becomes prior conspicuous issue, as far efficiency life system concerned. Hence enhancement local coefficient a primitive parameter looming world system. Extensive research carried out area steady impinging over flat plate by varying geometric well injection parameters. Not only that, plenty amount works also...

Pressure drop (Δp) in microconvective flows is of basic importance several applications which fluid through micropassages for heat removal. This investigation studies the effects variations air properties due to convective transfer on laminar microflow parameters: wall shear stress, Fanning friction factor, pressure drop, and Darcy factor. These are classified as direct indirect. The flow parameters, gas density (ρ) dynamic viscosity (μ), determine axial velocity field, drop. indirect...

Abstract The computational study of heat transfer characteristics over a flat surface under the impingement an air jet is most advanced scheme in research field convective technology. This aims to construct semiempirical relations for predicting magnitude local Nusselt number (Nu) against various impinging and target parameters. parameter includes Reynolds (Re) nozzle‐target spacing (Z/d), while represents Prandtl (Pr) nondimensional geometric thickness (t/d) surface. graphical...

The heat loss from cavity receiver in parabolic dish system determines the efficiency and cost effectiveness of system. A modified three coil solar inner wall area approximately times single receiver, is experimentally investigated to study effect fluid inlet temperature (Tfi=50°C 75 °C) inclination angle (θ = 0° 90°) on under wind condition for head side velocity at 3 m/s. Overall it was found that natural forced convection total increases with increase mean temperature. combined decreases...

Heat transfer using air jet impingement technique is one of the conspicuous tasks in looming world electronic packaging system. Here, material selection heat sink becomes prior and important assignments to construct a with desired characteristic cooling rate. In order study effect over characteristic, present work takes an initiative plotting Nusselt magnitude radial distance for different sink. This done by computing flow regime 2D axis symmetric geometry commercial simulating software,...

The present work aims to find out the performance parameter of hybrid chiller (combination vapour absorption cycle and compression cycle) 351.7 kW capacity for working temperature 5°C as evaporating 40°C condensing temperature. investigation uses R22 DMA pair where, (chlorodifluoromethane) is a refrigerant (dimethylacetamide) absorbent. theoretical results show that, with system electrical power consumption reduced coefficient (COP) improves by almost 23.05% same limits compared independent...

Thermal management in the looming world of electronic packaging system is most prior and conspicuous issue as far working efficiency concerned. The cooling such systems can be achieved by impinging air jet over heat sink impingement one technologies which are widely studied now. Here modulation geometric parameters results establishment characteristic rate target surface. curve actually resembles non-uniformity rate. This favors area average dissipation In order to study characteristic,...

This research presents the method of finding an optimised location a tubular receiver for compound parabolic collector (CPC) with 6° acceptance angle. Due to low angle, reflected rays concentrate below focus parabola. Graphical ray tracing (GRT) approach is implemented execute optical analysis and without manufacturing error in collector. It performed on collector–receiver combinations by varying height they are compared basis utilised area projection ratios. The ideal cases which contribute...

Correct placement of solar collectors is one the important parameter to utilize maximum heat radiated by sun. Compound parabolic collector (CPC) with small acceptance angle needs more tracking collect amount radiation. The number depends on position CPC respect sun throughout a day. This work executed investigate incident beam flux falls aperture plane implementation 5 different modes. numerical analyses were performed geometry 50 no. possible orientations for five modes and 10 hours. These...