Evaporation in a Horizontal Thin Film Scraped Surface Heat Exchanger

Abichandani, H.; Sarma, S. C.

doi:10.1111/j.1745-4530.1991.tb00089.x

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…For SS 304, K m = 16.27 W/mK. Steam film coefficient h o and U o is overall heat transfer coefficient is based on outside heat transfer area of heat exchanger ( Abichandani and Sarma, ). Steam‐side heat‐transfer coefficients for condensing steam on a horizontal pipe were calculated assuming film type condensation (Mcadams ):

h_{normalo} = 1.51 {true(\frac{4^{↑ γ}}{μ_{normalf}} true)}^{- 1/3} φ

where, γ is the mass flow rate of condensate (kg/s) from the lowest point divided by the heated length.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, use of SSHE is essential for manufacture of these products. For designing such heat exchangers, information on an overall heat transfer coefficient under actual conditions is required (Abichandani and Sarma ). Heat transfer coefficient is one of the main parameter which influences the performance of processing liquid products in SSHE.…”

Section: Introductionmentioning

confidence: 99%

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Design Aspect of Scraper Blade Assembly for Enhancing Film Heat Transfer Coefficient of Scraped Surface Heat Exchanger

Juyal

Sawhney

Dodeja

et al. 2016

J Food Process Engineering

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Scraped surface heat exchangers (SSHEs) are known for thermal processing of viscous food products. Heat transfer coefficient is one of the main parameter which influences the performance of processing liquid products in SSHE. The present study was undertaken to determine the film heat transfer coefficient for different blade assembly configurations. Milk was concentrated from 15 to 26% total solids using SSHE. Effect of number of blades (2, 4, 6), weight of blades (1.6, 1.75, 2.0 kg) and rotor speed (150, 175, 200 rpm) was investigated on scraped film heat transfer coefficient (h s ) using Response Surface Methodology. The results showed that h s increased linearly with increase in number of blades as well as rotor speed and that it was inversely related to blade weight. The h s varied from 695.3 to 1,415.4 W/m 2 K. The study was helpful in determining the design factors affecting film heat transfer coefficient of SSHE. PRACTICAL APPLICATIONSIn many of the earlier studies on SSHE, effect of scraper speed, flow rate or the number of blades has been individually studied. Therefore, effort was made to study the combined effect of these parameters. This article gives important insights on the design aspect of rotor blade assembly for thin film SSHE.

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h_{normalo} = 1.51 {true(\frac{4^{↑ γ}}{μ_{normalf}} true)}^{- 1/3} φ

where, γ is the mass flow rate of condensate (kg/s) from the lowest point divided by the heated length.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design Aspect of Scraper Blade Assembly for Enhancing Film Heat Transfer Coefficient of Scraped Surface Heat Exchanger

Juyal

Sawhney

Dodeja

et al. 2016

J Food Process Engineering

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show abstract

“…It ought to be emphasized that, upon studying an alternative process for ghee production, Abichandani and Sarma [44] had already highlighted the advantages of direct-contact heat transfer for heating thermosensitive solutions, without considering, though, their concentration. Milk concentration in a DCE was investigated by Zaida et al [34], who reported an equilibrium liquid temperature lower than 40 C and an energy efficiency close to that of a double-effect evaporator.…”

Section: Continuous Phasementioning

confidence: 98%

Gas-Liquid Direct-Contact Evaporation: A Review

Ribeiro¹,

Lage²

2005

Chem. Eng. Technol.

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Gas-liquid direct-contact evaporators are characterized by the bubbling of a superheated gas through the solution to be concentrated. In other words, they are nonisothermal bubble columns. Despite their simplicity of construction, these units exhibit rather complex hydrodynamics and, similar to what occurs to isothermal bubble columns, the design of such units still poses a problem. The present paper reviews the literature regarding this kind of equipment, addressing both experimental studies and modeling efforts. The covered issues include classic and potential applications, bubbling regimes, gas holdup and bubble size distributions, as well as mathematical models proposed for simulating the unit. Additionally, pertinent literature on isothermal bubble columns is also discussed. Recommendations are made for future research.

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The artificial neural network analysis of the flow of thin film hybrid nanofluid with variable film thickness in a variable porous medium over a rotating disk

Alharbi

2024

J Therm Anal Calorim

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Evaporation in a Horizontal Thin Film Scraped Surface Heat Exchanger

Cited by 7 publications

References 1 publication

Design Aspect of Scraper Blade Assembly for Enhancing Film Heat Transfer Coefficient of Scraped Surface Heat Exchanger

Design Aspect of Scraper Blade Assembly for Enhancing Film Heat Transfer Coefficient of Scraped Surface Heat Exchanger

Gas-Liquid Direct-Contact Evaporation: A Review

The artificial neural network analysis of the flow of thin film hybrid nanofluid with variable film thickness in a variable porous medium over a rotating disk

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