A Dynamic Simulation Model for a Heat Exchanger Malfunction Monitoring

Damiani, Lorenzo; Revetria, Roberto; Giribone, Pietro

doi:10.3390/en15051862

Cited by 4 publications

(4 citation statements)

References 20 publications

(23 reference statements)

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“…There is a wealth of literature on the modeling of heat exchangers in hydraulic applications, e.g., [33][34][35][36][37]. In line with our application in an optimization context as well as our modeling principles (see Section 3.2) that require the model to be highly flexible, expandable with low complexity, and thus with little effort for parameter identification, we model the plate heat exchanger as a series of cells in each fluid path.…”

Section: Plate Heat Exchangermentioning

confidence: 99%

The Faster the Better? Optimal Warm-Up Strategies for a Micro Combined Heat and Power Plant

2023

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The warm-up process is a critical operation phase for mCHP plants, directly impacting their efficiency, reliability, and lifetime. As small decentralized power generation units are increasingly expected to be operated on demand, start-ups will occur more frequently and thus the importance of the warm-up process will further increase. In this study, we address this problem by presenting a mathematical optimization framework that finds optimal actuator trajectories that significantly reduce the warm-up time and improve the thermal efficiency of an mCHP plant. The proposed optimization framework is highly flexible and adaptable to various objective functions, such as maximizing efficiency or minimizing the deviation from desired temperature references. The underlying mathematical model has been experimentally validated on a physical mCHP test rig. Selected case studies further demonstrate the effectiveness and flexibility of the framework and show that with the optimized actuator trajectories, the mCHP plant can reach its steady-state operating temperature in 40% less time. The results also indicate that the shortest warm-up time does not necessarily lead to the highest thermal efficiency. Accordingly, the methodology proposed in this paper provides a powerful tool to study higher-level operational strategies of mCHP plants and thus to maximize their overall performance, which directly translates into an improved operational cost-effectiveness, particularly in demand-driven energy landscapes.

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Section: Plate Heat Exchangermentioning

confidence: 99%

The Faster the Better? Optimal Warm-Up Strategies for a Micro Combined Heat and Power Plant

2023

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“…Guo et al [34] applied digital twins to factory design and proposed a modular approach to help build the digital twins model for a flexible factory in the design stage, enabling engineers to quickly evaluate the results to avoid defects and thus improve the feasibility of the design. Damiani et al [35] built the virtual simulation models using AnyLogic software and simulation technology, which provided an application of digital twins for the optimization design of the production line. Leng et al [36] verified the implementation effect of the design scheme of a large-scale automated high-rise warehouse with the help of the data analysis module of the simulation engine and the optimization algorithm of the digital twins system.…”

Section: Related Studiesmentioning

confidence: 99%

Digital Twins-Based Production Line Design and Simulation Optimization of Large-Scale Mobile Phone Assembly Workshop

Zhao

Zou

et al. 2022

Machines

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The mobile phone is a typical 3C electronic product characterized by frequent replacement, multiple product specifications, high flexibility, high-frequency production line switching, and urgent delivery time during production. Therefore, the optimized design of the mobile phone production workshop is crucial. This paper takes the assembly process of a specific type of mobile phone assembly as the research object and adopts the heuristic balance method to combine the production procedures. Moreover, it considers the automation degree of the process and the demand for production line rhythm to carry out station division and working hours design for the assembly process. The advantages and disadvantages of the plug-and-play production line and unit production line architecture are integrated, aiming at the production line’s construction cost and unit area capacity. A hybrid workshop with a mixed combination of two types of production lines is designed and an optimization model of hybrid workshop design is established. The semi-physical simulation technology of digital twins is utilized to verify the proposed design scheme to achieve the balance optimization of the production line, improve production efficiency, and reduce production costs. This work provides a technical scheme for designing and optimizing large-scale mobile phone assembly workshops with multi-batch and high-frequency production changes.

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“…Papers addressing malfunctions in the operation of heat exchangers are particularly interesting in cold climates [13]. These exchangers are commonly used for air cooling in cooling batteries within air handling units, frequently found in numerous office buildings.…”

Section: Introductionmentioning

confidence: 99%

Study of Heat Recovery Equipment for Building Applications

Popescu,

Catalina

2023

Buildings

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Nowadays, heat exchangers find widespread use across various applications in different fields, particularly in the field of heat recovery. This paper provides a detailed explanation of a plate heat exchanger counter-flow model developed in Simulink/Matlab. Water was employed in simulations for both circuits, although the thermal properties of other fluids can be investigated by modifying them. The “Tanks in series” method was used for simulation purposes. The developed model enables users to explore the impact of various parameters on heat exchanger functionality, such as altering the number of plates, the material or thickness of the plates, and the nature of thermal agents (gaseous or liquid). These models play a crucial role not only in simulating and sizing heat exchangers but also in achieving parametric optimization. Parameter variations can be employed to examine the operation of existing equipment under conditions different from their design specifications. The Simulink/Matlab proposed model, featuring a variable number of finite volumes to ensure high accuracy, was compared to the classical design method for plate heat exchangers. The results revealed good accuracy, with relative errors for heat transfer rate remaining below 2.6%. This research also considered the study of the number of finite volumes necessary for achieving accurate results. For the 40 finite volumes model, the relative error for heat transfer rate is less than 10%. Dividing the mesh into 50 finite volumes along the fluid flow direction resulted in relative errors ranging from 1.6% to 1.7%, indicating that a finer mesh was not necessary. To validate the conceived model, experimental data from the literature were compared. The relative errors for heat transfer rate between the Matlab/Simulink model’s results and experimental data ranged from 1.58% to 11.92%, demonstrating a strong agreement between the conceived model and the experimental values.

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A Dynamic Simulation Model for a Heat Exchanger Malfunction Monitoring

Cited by 4 publications

References 20 publications

The Faster the Better? Optimal Warm-Up Strategies for a Micro Combined Heat and Power Plant

The Faster the Better? Optimal Warm-Up Strategies for a Micro Combined Heat and Power Plant

Digital Twins-Based Production Line Design and Simulation Optimization of Large-Scale Mobile Phone Assembly Workshop

Study of Heat Recovery Equipment for Building Applications

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