Heat transfer studies in a spiral plate heat exchanger for water: palm oil two phase system

Ramachandran, S.; Kalaichelvi, P.; Sundaram, S.

doi:10.1590/s0104-66322008000300006

Cited by 15 publications

(9 citation statements)

References 5 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In some preliminary work, we studied heat transfer to dodecane-water mixtures (Ramachandran et al, 2006), palm oil-water mixtures (Ramachandran et al, 2008), nitrobenzene-water mixtures (Sathiyan et al, 2010) and diesel-water mixtures (Sathiyan et al, 2011) in spiral plate heat exchangers. Extending these studies, in this work, experiments have been conducted in a spiral plate heat exchanger with hot water as the hot fluid and immiscible two-phase mixtures of water and octane, kerosene and dodecane (any one) in different ratios and flow rates as the cold fluid.…”

Section: Heat Transfer In Spiral Heat Exchangersmentioning

confidence: 99%

Heat transfer to immiscible liquid mixtures in a spiral plate heat exchanger

Sathiyan

Rangarajan

Ramachandran³

2013

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

-This work presents new predictive correlations for heat transfer to immiscible liquid-liquid mixtures in a spiral plate heat exchanger. Liquid-liquid heat transfer studies were carried out in spiral plate heat exchangers for the water-octane, water-kerosene, and water-dodecane systems. For each composition of the mixture, the mass flow rate of the cold fluid was varied, keeping that of the hot fluid and the fluid inlet temperatures constant. Two-phase cold flow rates were in the laminar range, while the hot fluid flow was turbulent. Calculations of the LMTD (log mean temperature difference) correction factor showed that the flow was countercurrent. Heat transfer coefficients of the two-phase liquids were found to be strongly dependent on the composition of the liquid mixture and exhibited abrupt transitions as a function of the compositions. Given the absence of predictive correlations in the literature that sufficiently capture this compositiondependence, new empirical correlations were developed using part of the experimental data, with the composition of the cold fluid as an explicit variable. Statistical analysis of the regression yielded satisfactory results. The correlations were tested against the rest of the experimental data and were found to predict heat transfer coefficients within ± 15%. These preliminary studies should be useful in designing compact exchangers for handling two-phase water-organics mixtures.

show abstract

Section: Heat Transfer In Spiral Heat Exchangersmentioning

confidence: 99%

Heat transfer to immiscible liquid mixtures in a spiral plate heat exchanger

Sathiyan

Rangarajan

Ramachandran³

2013

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The data for pure fluid (diesel or water) was fitted to Equation (5) by regression analysis and the resultant constants a and m for diesel and water are given in Table 1. Initially the L-M parameter correlation was used for predicting the pressure drop of gas-liquid two-phase systems and then the heat transfer coefficients for liquid-liquid two-phase flow were related to the L-M parameter (Ramachandran et al, 2006(Ramachandran et al, , 2008 in Equation (17), where 'm' represents the power to which the Reynolds number is raised to determine the single phase heat transfer coefficient. The inlet and outlet temperatures of the shell side and tube side fluid are shown in Table 2 for different compositions.…”

Section: Shell Sidementioning

confidence: 99%

“…Ramachandran et al (2006) conducted two-phase experiments in a compact heat exchanger and developed heat transfer correlations for two-phase heat transfer involving liquid-liquid systems. Ramachandran et al (2008) developed a model for predicting the two-phase heat transfer coefficient of liquid-liquid systems using single phase data.…”

Section: Introductionmentioning

confidence: 99%

Two-phase experimental heat transfer studies on a water-diesel system in a shell and tube heat exchanger

Alagesan

Sundaram

2012

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

-Two-phase heat transfer involving two immiscible systems is gaining importance in petrochemical and allied industries. Varying compositions of diesel and water were experimentally studied in a 1:2 shell and tube heat exchanger. The data on pure water and diesel were fitted to an equation of the form. .The two-phase multiplier, Φ L , was related to the Lockhart Martinelli (L-M) parameter, χ tt 2 , using the two-phase data and a correlation Φ L = b+c(χ tt 2 )+d/(χ tt 2 ) 2 was established. The two-phase heat transfer coefficient was calculated based on the coefficients 'a' and 'm' for pure diesel and pure water along with Ф L and the L-M parameter. The calculated values of the two-phase heat transfer coefficient h 2ϕ based on pure diesel and pure water suggest that diesel is a better reference fluid since the average error is much smaller compared to pure water as reference.

show abstract

“…Saravanan and Rajavel investigated convective heat transfer coefficients of SPHE experimentally and proposed Nusselt number correlation. Ramachandran et al performed experimental investigations on a SPHEs and formulated two‐phase heat transfer coefficient correlations. Sathiyan et al experimentally analyzed SPHE by employing different flow rates and mass fractions of nitrobenzene‐water and a new Nusselt number correlation for two‐phase flows is developed.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement using hybrid nanofluids in spiral plate heat exchangers

Returi

Konijeti

Dasore

2019

Heat Trans. Asian Res.

View full text Add to dashboard Cite

A possible way to enhance the rate of heat transfer in the spiral plate heat exchanger (SPHE) is by employing hybrid nanofluids as its working medium. Hence, in the present work, effects of hybrid nanofluids on the thermal performance of SPHE has been investigated numerically. First, a countercurrent SPHE is designed and modeled. Later, simulation of SPHE has been carried out by employing conventional fluid (H2normalOnormal), nanofluids (Al2normalO3)/normalH2O,normalCnormalunormalO/normalH2O,normalTnormaliO2/normalH2O), and hybrid nanofluids (Al2normalO3+normalCnormalunormalO/normalH2O,Anormall2normalO3+normalTnormalinormalO2/normalH2O) to investigate the heat transfer rates. Finally, the performance of SPHE using hybrid nanofluid is compared with that of using water and nanofluids. The heat transfer augmentation of approximately 16%‐27% with hybrid nanofluids of overall 4% nanoparticles volume concentration and 10%‐16% with 2% nanoparticles volume concentration is observed when compared with that of pure water. Therefore, it can be inferred that the application of hybrid nanofluids in SPHE seems to be one of the promising solutions for augmentation of its thermal performance.

show abstract

Heat transfer studies in a spiral plate heat exchanger for water: palm oil two phase system

Cited by 15 publications

References 5 publications

Heat transfer to immiscible liquid mixtures in a spiral plate heat exchanger

Heat transfer to immiscible liquid mixtures in a spiral plate heat exchanger

Two-phase experimental heat transfer studies on a water-diesel system in a shell and tube heat exchanger

Heat transfer enhancement using hybrid nanofluids in spiral plate heat exchangers

Contact Info

Product

Resources

About