Experimental performance investigation of a shell and tube heat exchanger by exergy based sensitivity analysis

Mert, Suha Orçun; Reis, Alper

doi:10.1007/s00231-015-1636-x

Cited by 18 publications

(4 citation statements)

References 25 publications

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“…For the purpose of exergy balance, all types of exergy associated with material, heat, and work streams involved in a process have to be calculated using Equations ( 9)- (19) for the exergy analysis. The total exergy of a flow stream is expressed in terms of physical exergy (EX ph ), chemical exergy (EX ch ), kinetic exergy (EX KE ), and potential exergy (EX PE ) by [21] as…”

Section: Exergy Analysis Modelsmentioning

confidence: 99%

“…Due to the widespread application of the STHE, it is necessary to improve its performance [16]. Previous studies have been carried out on exergy analysis of the STHE using graphene oxide nanofluids [17], hot water [18], and tap water [19], but limited research was performed to investigate the exergy analysis of the STHE using flue gas as a medium.…”

Section: Introductionmentioning

confidence: 99%

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Exergy and Energy Analysis of the Shell-and-Tube Heat Exchanger for a Poultry Litter Co-Combustion Process

2023

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Increasing production of poultry litter, and its associated problems, stimulates the need for generating useful energy in an environmentally friendly and efficient energy system, such as the use of shell-and-tube heat exchangers (STHE) in a fluidized-bed combustion (FBC) system. A holistic approach which involves the integration of the First Law of Thermodynamics (FLT) and Second Law of Thermodynamics (SLT) is required for conducting effective assessment of an energy system. In this study, the STHE designed by the CAESECT research group, which was integrated into the lab-scale FBC, was investigated to determine the maximum available work performed by the system and account for the exergy loss due to irreversibility. The effects of varying operating parameters and configuration of the space heaters connected to the STHE for space heating purposes were investigated in order to improve the thermal efficiency of the poultry litter-to-energy conversion process. Exergy and energy analysis performed on the STHE using flue gas and water media showed higher efficiency (75–92%) obtained via energy analysis, but much lower efficiency (12–25%) was obtained when the ambient conditions were factored into the exergy analysis, thus indicating huge exergy loss to the surroundings. From the obtained experimental data coupled with the simulation on parallel arrangement of air heaters, it was observed that exergy loss increased with increasing flue gas flow rate from 46.8–57.6 kg/h and with increasing ambient temperature from 8.8 °C to 25 °C. To lower the cost of STHE during final design, a larger temperature difference between the hot and cold flue gas is needed throughout the exchanger, which further increases the exergetic loss while maintaining an energy balance. In addition, this study also found the optimal conditions to reduce exergy loss and improve energy efficiency of the designed STHE. This study shows the possibility to evaluate energy systems using integration of exergy and energy analysis.

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Section: Exergy Analysis Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exergy and Energy Analysis of the Shell-and-Tube Heat Exchanger for a Poultry Litter Co-Combustion Process

2023

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“…Prediction of exergy destruction (around 1.36 kW) for solar-based-direct expansion heat exchangers was done at Calicut (India) climate conditions with R22 as working fluid [45]- [47]. Geometrical changes in the heat exchanger can improve exergy efficiency, which means using a different types of heat exchangers (shell & tube, double tube), using nanofluids to exchange heat [33], [48], [49]. Maddah et al [50] were experimented to prepare modified twisted type tapes for heat exchangers by using turbulent nanofluid (SiO2-water) [51].…”

Section: Heat Exchanger/evaporatormentioning

confidence: 99%

A review on efficiency improvement methods in organic Rankine cycle system: an exergy approach

Raju

Rao

2022

IJAAS

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<span>Exergy, one of the handed-down energy conservation techniques, which can obtain from thermodynamic laws (first and second), will disclose the work presented within the system, the amount of irreversibility as well as what are the possible ways to reduce inefficiencies in the system. This discourse mainly highlighted various techniques and possible methods for efficiency improvement in the organic Rankine cycle (ORC). That means mainly concentrated on following key parameters like the selection of working fluid, suitable expander, the different heat source of an evaporator, and modifications in heat exchanger based on the application of ORC system through an exergy approach for better performance, decrease energy losses, and destruction rate. This review can help to pontificate for better-summarized results that were done before and suggested some ideas for how to select an optimized parameter for better efficiency and to decrease the destruction rate in the ORC system. </span>

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“…Mert and Reis [11] conducted experiments in order to specify performance of a STHEX and performed exergy-based analysis. The variation of tube/shell side exergy, inlet/outlet temperature of fluids and exergy efficiency of HEX with flow rate is investigated.…”

Section: Introductionmentioning

confidence: 99%

Energy and Exergy Analysis of a Shell and Tube Heat Exchangers Having Smooth and Corrugated Inner Tubes

Çelen

2022

Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Shell and tube heat exchangers are one of the most used heat exchanger types in applications and it is important to predict heat transfer capacity and pressure loss in both design stage. Heat transfer capacity of a heat exchanger can be enhanced by using tubes having enhanced surfaces instead of smooth ones. In this study, the usage of corrugated tubes in a shell and tube heat exchanger is investigated by using ε-NTU method, energy/exergy analysis. The impact of the usage of corrugated tubes on hot and cold fluid outlet temperatures, energy/exergy efficiencies, entropy generation and total exergy destruction are researched for various operation conditions. The results revealed that the difference between fluid outlet temperatures can be decreased by using tubes having corrugated surfaces instead of smooth ones because of fluid mixing and secondary flows obtained by means of the corrugations. Overall heat transfer coefficient of heat exchanger is enhanced up to 8% with the usage of corrugated tube in considered operation conditions. It is exhibited that the energy and exergy efficiencies of heat exchanger can be improved up to 18% and 16% with the usage of corrugated tubes instead of one having smooth tubes. Moreover, the entropy generation because of heat transfer and pressure loss and total exergy destruction of considered heat exchangers are determined to reveal the impact of corrugated tubes.

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Experimental performance investigation of a shell and tube heat exchanger by exergy based sensitivity analysis

Cited by 18 publications

References 25 publications

Exergy and Energy Analysis of the Shell-and-Tube Heat Exchanger for a Poultry Litter Co-Combustion Process

Exergy and Energy Analysis of the Shell-and-Tube Heat Exchanger for a Poultry Litter Co-Combustion Process

A review on efficiency improvement methods in organic Rankine cycle system: an exergy approach

Energy and Exergy Analysis of a Shell and Tube Heat Exchangers Having Smooth and Corrugated Inner Tubes

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