Thermal and hydraulic performance of finned-tube heat exchangers under different flow ranges: A review on modeling and experiment

Effect of silver-water nanofluid on heat transfer performance of a plate heat exchanger: An experimental and theoretical study

Numerical and experimental investigation of a helical coil heat exchanger for seawater-source heat pump in cold region

Closure of "Experiments At Detroit, Mich., On the Effect of Curvature upon the Flow of Water In Pipes"

Experimental investigation on convective heat transfer and pressure drop of cone helically coiled tube heat exchanger using carbon nanotubes/water nanofluids

Heat exchangers are the important engineering systems with wide variety of applications including power plants, nuclear reactors, refrigeration and air-conditioning systems, heat recovery systems, chemical processing and food industries. Helical coil configuration is very effective for heat exchangers and chemical reactors because they can accommodate a large heat transfer area in a small space, with high heat transfer coefficients. This paper deals with the parametric analysis of the helical coiled heat exchanger with various correlations given by different researchers for specific conditions. The parametric analysis of these various correlations with specific data is presented in this paper.

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Parametric Analysis of Helical Coil Heat Exchanger

Investigation on thermal analysis of conical coil heat exchanger

In the present study, an experimental investigation on thermal performance of the conical coil heat exchanger with 90° conical coil heat exchanger is reported. Three different conical coil heat exchangers of same mean coil diameter (Dm = 200 mm) with different tube diameters (di = 8, 10, 12.5 mm) are analyzed under steady state condition. The analysis is carried out for the tube side hot fluid flow range of 10–100 lph (Re = 500–5,000), while the shell side flow range of 30–90 lph. The data available from experimentation leads to evaluate heat transfer coefficients for inside and outside the tube of the conical coil heat exchanger by Wilsons plot method. The calculations are further extended to estimate Nusselt Number (Nu) and effectiveness. The empirical correlations are proposed for predicting Nu and the outlet temperatures of hot and cold fluids. The predicted empirical correlations show reasonable agreement with the experimental results within the given range of parameters.

Experimental investigation on heat transfer analysis of conical coil heat exchanger with 90° cone angle

The heat transfer and pressure drop analysis of conical coil heat exchanger
 with various tube diameters, fluid flow rates and cone angles is presented in
 this paper. Fifteen coils of cone angles 180O (horizontal spiral), 135O, 90O,
 45O and 0O (vertical helical) are fabricated and analyzed with, same average
 coil diameter (Dm) and tube length (L) with three different tube diameter
 (di). The experimentation is carried out with hot and cold water of flow rate
 10 to 100 lph (Re range 500 to 5000) and 30 to 90 lph respectively. The
 temperatures and pressure drop across the heat exchanger are recorded at
 different mass flow rates of cold and hot fluid. The various parameters (heat
 transfer coefficient (hi), Nusselt number (Nu) effectiveness (Є) and friction
 factor (f)) are estimated using the temperature, mass flow rate and pressure
 drop across the heat exchanger. The analysis indicates that, Nu and f is
 function of flow rate, tube diameter, cone angle and curvature ratio.
 Increase in tube side flow rate increases Nu, whereas it reduces with
 increase in shell side flow rate. Increase in cone angle and tube diameter,
 reduces Nu. The effects of cone angle, tube diameter and fluid flow rates on
 heat transfer and pressure drop characteristics are detailed in this paper.
 The empirical correlations are proposed to bring out the physics of the
 thermal aspects of the conical coil heat exchangers.

/pdf/experimental-investigation-on-heat-transfer-and-pressure-iqasfzd31a.pdf

Experimental investigation on heat transfer and pressure drop of conical coil heat exchanger with parameters tube diameter, fluid flow rates and cone angle

Helical coil heat exchangers are popular because of compact structure with enhanced heat transfer coefficient by passive heat transfer enhancement technique. Due to these advantages helical coil tube heat exchangers are widely used in various applications like power plants, nuclear reactors, refrigeration and air-conditioning systems, heat recovery systems, chemical processing and food industries. The analysis of the helical coil heat exchanger with different operating and geometric parameters is presented in this paper. The analysis shows that both operating and geometric parameters are having influence on heat transfer characteristic. The analysis of heat transfer coefficient and Nusselt Number with respect to Reynolds number with different correlations and its signifence is discussed in this paper. The effect of geometric parameter on performance of helical coiled tube heat exchanger is also presented in this paper.

Pramod S. Purandare

Papers

Parametric Analysis of Helical Coil Heat Exchanger

Investigation on thermal analysis of conical coil heat exchanger

Experimental investigation on heat transfer analysis of conical coil heat exchanger with 90° cone angle

Experimental investigation on heat transfer and pressure drop of conical coil heat exchanger with parameters tube diameter, fluid flow rates and cone angle

Effect of Geometric and Operating Parameters on Performance of Helical Coiled Tube Heat Exchanger