A Fast Prediction Model for Heat Transfer of Hot-Wall Heat Exchanger Based on Analytical Solution

Hu, Wenju; Jia, Peng; Nie, Jinzhe; Gao, Yan; Zhang, Qunli

doi:10.3390/app9010072

Cited by 5 publications

(5 citation statements)

References 10 publications

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“…The method used is mathematical modelling with the help of MATLAB software. The results of this study indicate that the thickness of a material affects heat transfer [16].…”

Section: Introductionmentioning

confidence: 76%

An analysis of tube thickness effect on shell and tube heat exchanger

Krisdiyanto

Adi

Sudarisman

et al. 2021

EEJET

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Heat exchangers are important equipment for the process of placing heat. The most widely used type of heat exchanger is shell and tube. This type is widely used because of its simple and easy design. Design of shell and tube heat exchangers is done by the side or shell variations to get the desired performance. Therefore, research is conducted to study the effect of tube thickness on heat transfer, pressure drop, and stress that occurs in the shell and tube heat exchanger so that the optimal tube thickness is obtained. In this research, the activities carried out are the design of heat exchangers for the production of oxygen with a capacity of 30 tons/day. The standard used in this study is the 9th edition heat exchanger design guidance document compiled by the Tubular Exchanger Manufacturer Association (TEMA). Analysis of the tube thickness effect on heat transfer, pressure drop, and stress was carried out using the SimScale platform. The effect of variations in tube thickness on heat transfer is that the thicker the tube, the lower the heat transfer effectiveness. The highest value of the heat exchanger effectiveness is 0.969 at the tube thickness variation of 0.5 mm. The lowest value of the heat exchanger effectiveness is 0.931 at the tube thickness variation of 1.5 mm. The effect of variations in tube thickness on pressure drop is that the thicker the tube, the higher the pressure drop. The highest value of pressure drop is in the variation in tube thickness of 1.5 mm, 321 Pa. The lowest value of drop pressure is in the variation of 0.5 mm tube thickness, which is 203 Pa. The thickness of the tube also increases the maximum stress on the components of the shell, head, tubesheet, baffle, and saddle, but the value is fluctuating

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“…The method used is mathematical modelling with the help of MATLAB software. The results of this study indicate that the thickness of a material affects heat transfer [16].…”

Section: Introductionmentioning

confidence: 76%

An analysis of tube thickness effect on shell and tube heat exchanger

Krisdiyanto

Adi

Sudarisman

et al. 2021

EEJET

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“…where ( 9) is for i = d 1 + 1, ⋯, d 2 and ( 10) is for i = 2, ⋯, d 1 . The total amount of fuel and combustion air mixture exiting the burner: (14) where Q fuel is the fuel amount (m 3 /s), Q air is the combustion air amount (m 3 /s), Q air_min is the combustion air minimal amount (m 3 /s), β is the excess air. The excess air β is set in the range 1 -1.1 (i.e., the optimal value for natural gas combustion).…”

Section: Modeling Of Flue Gas Flowsmentioning

confidence: 99%

“…Subsequently, new formulations of direct exchange areas and indirect exchange areas have been proposed, which allow the computation of the exchange areas of complex elements like unstructured meshes and solving a nonstationary heat transfer problem. Hu et al [14] describe a new heat transfer mathematical model of the hot-wall heat exchanger based on analytic solutions. The proposed model includes equations of the heat transfer by conduction and convection, which were adjusted for solving the problem.…”

Section: Introductionmentioning

confidence: 99%

Proposal of a Method for Measuring Gas Flow in a Heating Furnace: A Simulation Study

Pástor¹,

Durdán²,

Kačur³

et al. 2021

Adv. Sci. Technol. Res. J.

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Metallurgy, as one of the oldest industries, is currently experiencing a technological boom in an effort to increase production efficiency with the least possible impact on the environment. Modeling methods make it possible to design and simulate a technological process or technological equipment for conditions that take into account the above-mentioned aspects. For this reason, the article focuses on the use of simulation modeling using accessible computer technologies in order to improve the operation of heating aggregates with the metal-bearing batch, such as a continuous heating furnace. The paper describes the methodology for modeling the flow of flue gases in the working space of a gas heating furnace, which results in their enthalpy representation. A simulation study was performed for a gas-fired furnace used to heat gates. Three case studies were simulated with set values of on and off burners and fuel flow to them. The effect of these parameters on the total amount of recirculated flue gas was investigated. The results showed that the fuel flow regulation to the burners at the material inlet into the furnace had a higher effect on the overall recirculation than the switching on and off the burners on the furnace's outlet side. The results pointed to critical points on the inner shell of the furnace, which could be the most critically thermally stressed, for example, in the places of the collision of opposing flue gas flows.

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“…Since the external wall system plays a significant rile in energy conservation and deal with the aggressive local environment [10,11]. The external envelope of the building, that is the walls, doors, windows and ceiling, play an important role in managing the building's energy demand by managing and minimising heat transference from the external atmosphere to the internal [12,13].…”

Section: ) Building Mass and Designmentioning

confidence: 99%

Impact of University Campus Design on Local Urban Development and Sprawl: A Case Study Analysis of Albaha University, Saudi Arabia

Aldossary¹,

Alkhuzai²

2021

URP

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The paper investigates and analyses the urban design of the Albaha University campus from an economic and environmental perspective. With coronavirus pandemic, the education protocol, precautionary measures and social distance have been applied in order to achieve safety environment within the university boundary. The study analyses the university campus design in light of sustainable requirements, social distance protocol, employment of natural resources and application of urban sustainable design criteria. Regional urban planning and development needs to include attraction factors to boost the economy and trigger reverse migration. Establishing a university in the region helps significantly in terms of local urban growth but environmental aspects including energy conservation and management should also be considered for environmental reasons. The approach used in this study involved: (a) an environmental site analysis including an analysis of natural resources such as the wind, solar energy and annual rainfall to determine how such resources can be employed in the operation of the university; (b) a site visit survey analysis to investigate the sustainable use of the current facilities and open spaces of the university campus and the application of on-site renewable energy; and (c) a SWOT analysis to determine the role of the university in the local economy system. The urban sustainable design and possibility of using landscaping, shading devices, and solar radiation systems was investigated through building plans and a site visit to the campus. In addition, the form and fabric of the academic buildings was investigated to identify the application of shading devices, the windows design and use of insulation. The study highlights the fact that many buildings are still under construction while other buildings are still currently on plan. The paper concludes by giving some recommendations from an economic and environmental perspective.

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A Fast Prediction Model for Heat Transfer of Hot-Wall Heat Exchanger Based on Analytical Solution

Cited by 5 publications

References 10 publications

An analysis of tube thickness effect on shell and tube heat exchanger

An analysis of tube thickness effect on shell and tube heat exchanger

Proposal of a Method for Measuring Gas Flow in a Heating Furnace: A Simulation Study

Impact of University Campus Design on Local Urban Development and Sprawl: A Case Study Analysis of Albaha University, Saudi Arabia

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