Experimental and numerical investigation of transport phenomena and kinetics for convective shrimp drying

Nguyễn, Minh Phú; Ngo, Tu Thien; Le, Thanh Danh

doi:10.1016/j.csite.2019.100465

Cited by 29 publications

(17 citation statements)

References 19 publications

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“…DNS and LES can provide details of turbulence statistics but are high-cost methods [19][20][21]. The RANS method is usually used for CFD simulations due to its lower computational cost [22,23], especially for turbomachinery simulation. Moreover, previous studies have confirmed that the SST γ model and SST γ − θ model are the most suitable for analysis of transitional flows [24,25].…”

Section: Governing Equations and Turbulence Modelmentioning

confidence: 99%

Effects of Leading-Edge Modification in Damaged Rotor Blades on Aerodynamic Characteristics of High-Pressure Gas Turbine

Dam

Ryu

2020

Mathematics

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The flow and heat-transfer attributes of gas turbines significantly affect the output power and overall efficiency of combined-cycle power plants. However, the high-temperature and high-pressure environment can damage the turbine blade surface, potentially resulting in failure of the power plant. Because of the elevated cost of replacing turbine blades, damaged blades are usually repaired through modification of their profile around the damage location. This study compared the effects of modifying various damage locations along the leading edge of a rotor blade on the performance of the gas turbine. We simulated five rotor blades—an undamaged blade (reference) and blades damaged on the pressure and suction sides at the top and middle. The Reynolds-averaged Navier–Stokes equation was used to investigate the compressible flow in a GE-E3 gas turbine. The results showed that the temperatures of the blade and vane surfaces with damages at the middle increased by about 0.8% and 1.2%, respectively. This causes a sudden increase in the heat transfer and thermal stress on the blade and vane surfaces, especially around the damage location. Compared with the reference case, modifications to the top-damaged blades produced a slight increase in efficiency about 2.6%, while those to the middle-damaged blades reduced the efficiency by approximately 2.2%.

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Section: Governing Equations and Turbulence Modelmentioning

confidence: 99%

Effects of Leading-Edge Modification in Damaged Rotor Blades on Aerodynamic Characteristics of High-Pressure Gas Turbine

Dam

Ryu

2020

Mathematics

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“…The temperature rise (T) is the air temperature difference, which was defined in Eq. (5). When the parameter increases, the Re number decreases, leading to a decrease in the Nusselt number.…”

Section: Exergy Efficiencymentioning

confidence: 98%

“…The solar air heater (SAH) is perhaps the simplest and most reliable solar thermal energy converter. The device converts solar thermal energy into a hot air stream that can be used for heating or drying [5]. However, due to the nondominant thermophysical properties of the air, the efficiency of the air collector is not high.…”

Section: Introductionmentioning

confidence: 99%

A Review of Energy and Exergy Analyses of a Roughened Solar Air Heater

Phu

Luân

2020

ARFMTS

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In this paper, eleven roughness elements in solar air heater duct analysed both energy and exergy were reviewed. Various roughness geometries such as ribs, twisted tap, baffles, and metal waste were surveyed about heat transfer and friction when the air flow is passing absorber plate. Evaluation criteria of roughness on the absorber plate including thermohydraulic performance parameter, thermal efficiency, effective efficiency, and exergy efficiency were presented and compared. Results showed that protruded ribs in arc shape indicated the largest Nusselt number. The ribs exhibited the highest thermohydraulic performance parameter at a Reynolds number greater than 5000. Jet impingement with arc-shaped ribs and roughness elements of metal waste were found the smallest exergy efficiencies. The biggest effective and exergy efficiencies were obtained to be 70% and 1.9%, respectively. The thermohydraulic performance parameter varied from 0.5 to 2.0. The review paper aims to provide information about roughness geometries investigated both first and second laws of thermodynamics and figure of merits to overview artificial roughness in a solar air heater.

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“…At present, drying and freezing processes are the main methods applied to preserve shrimp and other aquatic products, but the freezing process needs a more elevated initial investment and higher costs of manufacture and conveying (Olvera Ríos et al., 2020). However, drying is preferred due to its high level of efficiency, easy functioning, and economical investing costs (Li, Zhou, et al., 2020; Nguyena et al., 2019), in addition to the advantages of prevention of spoilage of foods by reduction of a w , as well as the production of materials with weight and volume lower to make storage and transportation easier (Hu et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

Ultrasound use as a pretreatment for shrimp (Litopenaeusvannamei) dehydration and its effect on physicochemical, microbiological, structural, and rehydration properties

Castañeda‐López

Ulloa

Rosas‐Ulloa

et al. 2021

J. Food Process. Preserv.

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Alternative pretreatments to food materials are necessary to enhance the dehydration process and improve the quality of products. The aim of this study was to evaluate the effect of the ultrasound pretreatments on the dehydration behavior and quality characteristics of dehydrated shrimp. Shrimps were ultrasonicated in a salt solution (10%) at 4°C for 15 and 30 min in an ultrasonic bath (130 W, 40 kHz) and then dehydrated and their kinetics modeled. The ultrasound pretreatments for 15 and 20 min diminished the dehydration time by 15.6% and 12.1%, respectively, in comparison with the control treatments, being the Page model the one that best described the dehydration kinetics. The content of ash significantly increased (p < .05) and the water activity (aw) significantly decreased (p < .05), while some rehydration quality indices also raised in the dehydrated shrimps pretreated with ultrasound in comparison with controls. Ultrasound can potentially be applied for shrimp dehydration, given the advantages in reducing processing time and improving product quality. Practical applications Shrimp (Litopenaeus vannamei) is a nutritious seafood that is appreciated for its delicious meat, which represents 53% of the world’s aquaculture production of crustaceans. Unfortunately, shrimp like many foods is highly perishable; hence, different processing technologies must be applied to improve its useful life. At present, drying is the main applied method in the aquatic product processing industry, but depending of the applied conditions, changes may occur that affect the quality of the product. Pretreatments such as the ultrasound improved the dehydration process and the quality of the dehydrated shrimp. Therefore, such conditions could be used to produce ready‐to‐eat food from shrimp, as is currently demanded by consumers.

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Experimental and numerical investigation of transport phenomena and kinetics for convective shrimp drying

Cited by 29 publications

References 19 publications

Effects of Leading-Edge Modification in Damaged Rotor Blades on Aerodynamic Characteristics of High-Pressure Gas Turbine

Effects of Leading-Edge Modification in Damaged Rotor Blades on Aerodynamic Characteristics of High-Pressure Gas Turbine

A Review of Energy and Exergy Analyses of a Roughened Solar Air Heater

Ultrasound use as a pretreatment for shrimp (Litopenaeusvannamei) dehydration and its effect on physicochemical, microbiological, structural, and rehydration properties

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