scholarly journals On the Optimal Tube Spacing for Shell-and-Tube Gas Turbine Recuperators

1979 ◽  
Author(s):  
W. Hilary Lee
Keyword(s):  
High Pressure ◽  
Heat Exchanger ◽  
Gas Turbine ◽  
Minimum Weight ◽  
Diameter Ratio ◽  
Minimum Volume ◽  
Tube Heat Exchanger ◽  
Shell And Tube

The effect of high pressure inside and outside of tubes and of pressure ratios on tube spacings associated with minimum volume and minimum weight of shell-and-tube gas turbine recuperators, is examined. For this purpose, a method was developed for analyzing volume and weight of shell-and-tube heat exchanger surfaces. The influence of TEMA recommended minimum spacing-to-diameter ratio on the result is discussed. Implications of the above findings on gas turbine recuperator design is sketched.

Pressure Variation in Low Pressure Side of Shell and Tube Heat Exchanger After Tube Rupture

2014 ◽  
Author(s):  
Ganesh S. Katke ◽  
M. Venkatesh ◽  
N. P. Gulhane
Keyword(s):  
High Pressure ◽  
Heat Exchanger ◽  
Low Pressure ◽  
Pressure Variation ◽  
Operating Pressure ◽  
Pressure Side ◽  
Tube Heat Exchanger ◽  
Analytical Algorithm ◽  
Shell And Tube ◽  
Design Pressure

This paper presents an analytical algorithm to determine the pressure variation on the Low Pressure side of a Shell and Tube Heat Exchanger (STHE) after a tube rupture and its validation using CFD simulation. STHEs are often used for exchanging heat between high-pressure (HP) and low-pressure (LP) fluids in the chemical process industry. In case tube rupture occurs in a STHE having a large pressure difference between HP and LP side, there is a risk of release of significant quantity of fluid from the HP side to the LP side. The consequent pressure build-up can lead to the failure of LP side pressure envelope. Generally, design pressure of the LP side is about 10–20% higher than the operating pressure of the LP side fluid, but well below the operating pressure on the HP side. There is no well-established methodology to design the LP side to withstand sudden release of high pressure fluid following a tube rupture. Three dimensional analyses were carried out using Computational Fluid Dynamics to study the pressure variation in LP side (shell side) of a Gas Cooler and to validate the results obtained from the analytical algorithm. It has been observed that the pressure on the LP side exceeds the design pressure instantaneously due to generation of a pressure pulse after tube rupture. This may lead to damage of LP envelope (shell) and internal structure of STHE.

Optimization of high-pressure shell-and-tube heat exchanger for syngas cooling in an IGCC

2010 ◽  
Vol 53 (21-22) ◽  
pp. 4543-4551 ◽  
Author(s):  
Yan Li ◽  
Xiumin Jiang ◽  
Xiangyong Huang ◽  
Jigang Jia ◽  
Jianhui Tong
Keyword(s):  
High Pressure ◽  
Heat Exchanger ◽  
Tube Heat Exchanger ◽  
Shell And Tube

scholarly journals Selection of the air heat exchanger operating in a gas turbine air bottoming cycle

2013 ◽  
Vol 34 (4) ◽  
pp. 93-106 ◽  
Author(s):  
Tadeusz Chmielniak ◽  
Daniel Czaja ◽  
Sebastian Lepszy
Keyword(s):  
Heat Exchanger ◽  
Gas Turbine ◽  
Tube Heat Exchanger ◽  
Oil Platforms ◽  
Air Turbine ◽  
Shell And Tube ◽  
Gas Turbine Exhaust ◽  
Selection Of ◽  
Turbine Exhaust ◽  
Financial Profitability

Abstract A gas turbine air bottoming cycle consists of a gas turbine unit and the air turbine part. The air part includes a compressor, air expander and air heat exchanger. The air heat exchanger couples the gas turbine to the air cycle. Due to the low specific heat of air and of the gas turbine exhaust gases, the air heat exchanger features a considerable size. The bigger the air heat exchanger, the higher its effectiveness, which results in the improvement of the efficiency of the gas turbine air bottoming cycle. On the other hand, a device with large dimensions weighs more, which may limit its use in specific locations, such as oil platforms. The thermodynamic calculations of the air heat exchanger and a preliminary selection of the device are presented. The installation used in the calculation process is a plate heat exchanger, which is characterized by a smaller size and lower values of the pressure drop compared to the shell and tube heat exchanger. Structurally, this type of the heat exchanger is quite similar to the gas turbine regenerator. The method on which the calculation procedure may be based for real installations is also presented, which have to satisfy the economic criteria of financial profitability and cost-effectiveness apart from the thermodynamic criteria.

A Shell-and-Tube Heat Exchanger Optimization by Differential Evolution

2016 ◽  
Author(s):  
Leonardo Cavalheiro Martinez ◽  
Leonardo Cavalheiro Martinez ◽  
Viviana Mariani ◽  
Marcos Batistella Lopes
Keyword(s):  
Heat Exchanger ◽  
Differential Evolution ◽  
Tube Heat Exchanger ◽  
Shell And Tube

Numerical simulation of the effect of baffle cut and baffle spacing on shell side heat exchanger performance using CFD

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Swanand Gaikwad ◽  
Ashish Parmar
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Transfer Coefficient ◽  
Numerical Results ◽  
Shell Side ◽  
Tube Heat Exchanger ◽  
Shell And Tube ◽  
Two Parameters

AbstractHeat exchangers possess a significant role in energy transmission and energy generation in most industries. In this work, a three-dimensional simulation has been carried out of a shell and tube heat exchanger (STHX) consisting of segmental baffles. The investigation involves using the commercial code of ANSYS CFX, which incorporates the modeling, meshing, and usage of the Finite Element Method to yield numerical results. Much work is available in the literature regarding the effect of baffle cut and baffle spacing as two different entities, but some uncertainty pertains when we discuss the combination of these two parameters. This study aims to find an appropriate mix of baffle cut and baffle spacing for the efficient functioning of a shell and tube heat exchanger. Two parameters are tested: the baffle cuts at 30, 35, 40% of the shell-inside diameter, and the baffle spacing’s to fit 6,8,10 baffles within the heat exchanger. The numerical results showed the role of the studied parameters on the shell side heat transfer coefficient and the pressure drop in the shell and tube heat exchanger. The investigation shows an increase in the shell side heat transfer coefficient of 13.13% when going from 6 to 8 baffle configuration and a 23.10% acclivity for the change of six baffles to 10, for a specific baffle cut. Evidence also shows a rise in the pressure drop with an increase in the baffle spacing from the ranges of 44–46.79%, which can be controlled by managing the baffle cut provided.

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