Numerical Study of Heat Transfer Characteristics in Shell-and-Tube Heat Exchanger

Gugulothu, Ravi; Sanke, Narsimhulu; Gupta, A.V.S.S.K.S.

doi:10.1007/978-981-13-1903-7_43

Cited by 18 publications

(13 citation statements)

References 7 publications

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“…Zones differing in temperature are formed, depending on the chemical composition of the specific area. Exact modelling of phase transformation processes can be found in scientific writing (Amano and Sunden 2010; Gugulothu et al 2019). However, using the energy balance, it is possible to establish, in good approximation, the amount of dry ice needed to freeze sludge.…”

Section: Methodsmentioning

confidence: 99%

Waste-activated sludge disruption by dry ice: bench scale study and evaluation of heat phase transformations

Machnicka

Grűbel

Sikora

2019

Environ Sci Pollut Res

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The freezing process consists of dissipating heat from the product until the final temperature is lower than the temperature of crystallisation of that product. Freezing can be used for numerous applications, including for disruption of waste-activated sludge (WAS). The aim of this study was to calculate the estimated amount of heat conveyed between the solidified carbon dioxide and the WAS, in the following ratios: 0.25:1; 0.5:1; 0.75:1 and 1:1. In heat of phase transformations, dry ice sublimation, water solidification, the amount of heat transferred by other substances and heat transferred from the sludge (dry sludge) were taken into account during the process of WAS freezing. Heat changes on the surface of WAS were registered using a thermovision camera. The effectiveness of WAS disintegration was confirmed by several biochemical parameters such as soluble chemical oxygen demand (increase over 14 times), degree of disintegration (48%), proteins (increase over 5 times), carbohydrates (increase almost 7 times), RNA (increase by 2.23 mg L−1), ammonia nitrogen (increase over 23 times), phosphates (increase almost 27 times) and turbidity (increased over 7 times). It was found that dry ice pretreatment of WAS can be an intriguing alternative for the conventional methods used.Electronic supplementary materialThe online version of this article (10.1007/s11356-019-05889-2) contains supplementary material, which is available to authorized users.

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Section: Methodsmentioning

confidence: 99%

Waste-activated sludge disruption by dry ice: bench scale study and evaluation of heat phase transformations

Machnicka

Grűbel

Sikora

2019

Environ Sci Pollut Res

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“…The hydraulic diameter of the shell side fluid for square pattern 14,33

{D}_{h}=\frac{4\left({P}_{t}^{2}-\frac{\pi {d}_{0}^{2}}{4}\right)}{\pi {d}_{0}}.

…”

Section: Data Reductionmentioning

confidence: 99%

Effect of helical baffles and water‐based Al₂O₃, CuO, and SiO₂nanoparticles in the enhancement of thermal performance for shell and tube heat exchanger

Gugulothu

Sanke

2022

Heat Trans

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“…Enhanced ice formation can also occur around the tubes due to the significant variation of the local heat transfer coefficient along the circumference [96,97]. As shown in [98], these effects can be mitigated by applying helical plates.…”

Section: Challenges Of Lng Regasificationmentioning

confidence: 99%

Liquefied Natural Gas in Mobile Applications—Opportunities and Challenges

et al. 2020

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Liquefied natural gas (LNG) is one of the most influential fuels of the 21st century, especially in terms of the global economy. The demand for LNG is forecasted to reach 400 million tonnes by 2020, increasing up to 500 million tonnes in 2030. Due to its high mass and volumetric energy density, LNG is the perfect fuel for long-distance transport, as well as for use in mobile applications. It is also characterized by low levels of emissions, which is why it has been officially approved for use as a marine fuel in Emission Control Areas (ECAs) where stricter controls have been established to minimize the airborne emissions produced by ships. LNG is also an emerging fuel in heavy road and rail transport. As a cryogenic fuel that is characterized by a boiling temperature of about 120 K (−153 °C), LNG requires the special construction of cryogenic mobile installations to fulfill conflicting requirements, such as a robust mechanical construction and a low number of heat leaks to colder parts of the system under high safety standards. This paper provides a profound review of LNG applications in waterborne and land transport. Exemplary constructions of LNG engine supply systems are presented and discussed from the mechanical and thermodynamic points of view. Physical exergy recovery during LNG regasification is analyzed, and different methods of the process are both analytically and experimentally compared. The issues that surround two-phase flows and phase change processes in LNG regasification and recondensation are addressed, and technical solutions for boil-off gas recondensation are proposed. The paper also looks at the problems surrounding LNG installation data acquisition and control systems, concluding with a discussion of the impact of LNG technologies on future trends in low-emission transport.

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Numerical Study of Heat Transfer Characteristics in Shell-and-Tube Heat Exchanger

Cited by 18 publications

References 7 publications

Waste-activated sludge disruption by dry ice: bench scale study and evaluation of heat phase transformations

Waste-activated sludge disruption by dry ice: bench scale study and evaluation of heat phase transformations

Effect of helical baffles and water‐based Al₂O₃, CuO, and SiO₂nanoparticles in the enhancement of thermal performance for shell and tube heat exchanger

Liquefied Natural Gas in Mobile Applications—Opportunities and Challenges

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Numerical Study of Heat Transfer Characteristics in Shell-and-Tube Heat Exchanger

Cited by 18 publications

References 7 publications

Waste-activated sludge disruption by dry ice: bench scale study and evaluation of heat phase transformations

Waste-activated sludge disruption by dry ice: bench scale study and evaluation of heat phase transformations

Effect of helical baffles and water‐based Al2O3, CuO, and SiO2nanoparticles in the enhancement of thermal performance for shell and tube heat exchanger

Liquefied Natural Gas in Mobile Applications—Opportunities and Challenges

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Product

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Effect of helical baffles and water‐based Al₂O₃, CuO, and SiO₂nanoparticles in the enhancement of thermal performance for shell and tube heat exchanger