Mathematical Modeling of Industrial Heat Exchanger System

2012 ◽  
Vol 229-231 ◽  
pp. 2122-2124 ◽  
Author(s):  
Abdulrahman A.A. Emhemed ◽  
Rosbi Bin Mamat ◽  
Dirman Hanafi
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Heat Exchanger ◽  
System Performance ◽  
Cooling System ◽  
Dynamic Modelling ◽  
Temperature Output

In manufacturing and industrial fields used heat exchanger to control of temperature weather as a boiler or cooling system. This system is not stable as the temperature output can easily disturb by noise and other disturbance such as surrounding temperature. To improve the heat exchanger system performance, the mathematical model‘s needed. The heat exchanger mathematical model in this case is constructed using dynamic modelling based on real parameters of the heat exchanger. The simulation result shows almost similar trend of responses with the experiment result, it means they are can used as a model of the heat exchanger.

Cost Estimation Study for the Effect of Biofouling on Engine Cooling System Performance with an 8000 BHP Vessel

2016 ◽  
Vol 819 ◽  
pp. 427-431 ◽  
Author(s):  
Agus Sunjarianto Pamitran ◽  
Samuel Agustinus Adam ◽  
Nasruddin ◽  
Muhammad Idrus Alhamid
Keyword(s):  
Heat Exchanger ◽  
Cost Estimation ◽  
System Performance ◽  
Transfer Rate ◽  
Cooling System ◽  
Good Condition ◽  
Engine Cooling ◽  
Naval Ship ◽  
System Maintenance ◽  
Additional Fuel

Every engine needs a cooling system in order to maintain the performance of engine. In this study the cooling system is applied in naval ship with the exchange of freshwater and seawater. Since the seawater contains biological fouling, then it is scaled in the heat exchanger so that the performance of heat exchanger is decreasing from time to time. This makes the heat transfer rate in cooler is less efficient so that to maintain the BHP of the engine it needs to consume more fuel. The result shows that the effect could incur a loss of about USD 463,852.8/month. This condition makes the importance of cooling system maintenance in order to keep the temperature of the naval ship engine and to minimize the additional fuel cost. For cooling system itself, to keep the cooler in a good condition, it needs to clean the cooler for every 720 hours, or once a month.

Mathematical Model of Thermal Physics of the Dual-Cycle Cooling System of the Tool for Pieces Nanostructuring Burnishing

2015 ◽  
Vol 770 ◽  
pp. 449-455 ◽  
Author(s):  
Viktor P. Kuznetsov ◽  
Andrei S. Skorobogatov ◽  
V.G. Gorgots
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Mathematical Model ◽  
Cooling System ◽  
Heat Removal ◽  
System Of Equations ◽  
Thermal Physics ◽  
Nanostructuring Burnishing ◽  
Dual Cycle ◽  
The Mathematical Model

The article considers the problems of the mathematical modeling of thermal physics of the tool for nanostructuring burnishing. Physical and equivalent heat diagram of the system are developed. On the basis of the equivalent heat transfer diagram, the equivalent circuit and the system of equations of the mathematical model are created. The dependence of the tool indenter tip temperature on cooling system thermal parameters is obtained. The comparison of efficiency of heat removal from the tool indenter when using the developed two-circuit cooling system and the system supplying lubricant cooling liquid through the lathe centre spindle, as well as when applying nanostructuring burnishing without cooling is carried out.

scholarly journals Improving the cooling systems of automotive engines and methods for monitoring their condition

2021 ◽  
pp. 41-44
Author(s):  
E.P. Parlyuk ◽  
Keyword(s):  
Mathematical Model ◽  
Heat Exchanger ◽  
Heat Dissipation ◽  
Cooling System ◽  
Quantitative Relationship ◽  
Thermal Processes ◽  
Structural Diagram ◽  
Cooling Systems ◽  
Automotive Engines ◽  
Machine Operation

It has been established that the cooling system of modern tractors and trucks can include 5 to 7 independent cooling circuits. A structural diagram of a modular cooling system for automotive engines and a mathematical model of thermal processes in a heat exchanger of the modular cooling system during machine operation are proposed. It is shown that the development of an algorithm for predicting and monitoring the state of the modular cooling system is possible based on a quantitative relationship between the rate of decrease in heat dissipation capacity and the duration of machine operation.

scholarly journals Experimental Research of a Regenerative Heat Exchanger

Processes ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 100
Author(s):  
Nikolay Monarkin ◽  
Tat’yana Monarkina
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Air Temperature ◽  
Experimental Research ◽  
Heat Exchangers ◽  
Regenerative Heat ◽  
Proposed Model ◽  
Experimental Values

Stationary switching regenerative heat exchangers (SSRHEs) are used for the ventilation of premises. The mathematical modeling of heat exchange between air and a regenerative nozzle is used to design the SSRHEs and determine their main parameters. The numerical solution of the proposed mathematical model has been experimentally tested for adequacy. The calculated and experimental values of the air temperature at the ends of the SSRHE are compared. It is determined that the proposed model is adequate and can be used in further research.

Application of the method of mathematical modeling for forecasting channel deformations at the underwater crossing of the main pipeline

2020 ◽  
Vol 10 (6) ◽  
pp. 599-609
Author(s):  
Valery А. Gruzdev ◽  
◽  
Georgy V. Mosolov ◽  
Ekaterina A. Sabayda ◽  
◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Roughness Coefficient ◽  
Computational Domain ◽  
Channel Deformations ◽  
Geological Surveys ◽  
Kuban River ◽  
The Stability ◽  
Protective Structures

In order to determine the possibility of using the method of mathematical modeling for making long-term forecasts of channel deformations of trunk line underwater crossing (TLUC) through water obstacles, a methodology for performing and analyzing the results of mathematical modeling of channel deformations in the TLUC zone across the Kuban River is considered. Within the framework of the work, the following tasks were solved: 1) the format and composition of the initial data necessary for mathematical modeling were determined; 2) the procedure for assigning the boundaries of the computational domain of the model was considered, the computational domain was broken down into the computational grid, the zoning of the computational domain was performed by the value of the roughness coefficient; 3) the analysis of the results of modeling the water flow was carried out without taking the bottom deformations into account, as well as modeling the bottom deformations, the specifics of the verification and calibration calculations were determined to build a reliable mathematical model; 4) considered the possibility of using the method of mathematical modeling to check the stability of the bottom in the area of TLUC in the presence of man-made dumping or protective structure. It has been established that modeling the flow hydraulics and structure of currents, making short-term forecasts of local high-altitude reshaping of the bottom, determining the tendencies of erosion and accumulation of sediments upstream and downstream of protective structures are applicable for predicting channel deformations in the zone of the TLUC. In all these cases, it is mandatory to have materials from engineering-hydro-meteorological and engineering-geological surveys in an amount sufficient to compile a reliable mathematical model.

On the displacements of the contours of the optic-electronic space images. Mathematical modeling of displacement

2017 ◽  
Vol 992 (4) ◽  
pp. 32-38 ◽  
Author(s):  
E.G. Voronin
Keyword(s):  
Mathematical Modeling ◽  
Remote Sensing ◽  
Mathematical Model ◽  
Point Of View ◽  
Design Features ◽  
Space Images ◽  
Electronic Imaging ◽  
Measuring Accuracy ◽  
Physical Laws

The article opens a cycle of three consecutive publications dedicated to the phenomenon of the displacement of the same points in overlapping scans obtained adjacent CCD matrices with opto-electronic imagery. This phenomenon was noticed by other authors, but the proposed explanation for the origin of displacements and the resulting estimates are insufficient, and developed their solutions seem controversial from the point of view of recovery of the measuring accuracy of opticalelectronic space images, determined by the physical laws of their formation. In the first article the mathematical modeling of the expected displacements based on the design features of a scanning opto-electronic imaging equipment. It is shown that actual bias cannot be forecast, because they include additional terms, which may be gross, systematic and random values. The proposed algorithm for computing the most probable values of the additional displacement and ways to address some of the systematic components of these displacements in a mathematical model of optical-electronic remote sensing.

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