State Variables Estimation for a Counter-Flow Double-Pipe Heat Exchanger Using Multi-linear Model

Zapata, Betty López; Escobar, R.F.; Medina, Manuel Adam; Astorga‐Zaragoza, C.M.

doi:10.1109/cerma.2009.39

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Another example of the contribution made by the students is given in the work presented in [ 23 ], where the student, Betty Yolanda López-Zapata, was a collaborator. Furthermore, the MCI has provided support to develop some published works regarding heat exchanger devices and their control [ 24 , 25 ].…”

Section: Resultsmentioning

confidence: 99%

Monitoring and Control Interface Based on Virtual Sensors

Escobar

Medina

Beltrán

et al. 2014

Sensors

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In this article, a toolbox based on a monitoring and control interface (MCI) is presented and applied in a heat exchanger. The MCI was programed in order to realize sensor fault detection and isolation and fault tolerance using virtual sensors. The virtual sensors were designed from model-based high-gain observers. To develop the control task, different kinds of control laws were included in the monitoring and control interface. These control laws are PID, MPC and a non-linear model-based control law. The MCI helps to maintain the heat exchanger under operation, even if a temperature outlet sensor fault occurs; in the case of outlet temperature sensor failure, the MCI will display an alarm. The monitoring and control interface is used as a practical tool to support electronic engineering students with heat transfer and control concepts to be applied in a double-pipe heat exchanger pilot plant. The method aims to teach the students through the observation and manipulation of the main variables of the process and by the interaction with the monitoring and control interface (MCI) developed in LabVIEW©. The MCI provides the electronic engineering students with the knowledge of heat exchanger behavior, since the interface is provided with a thermodynamic model that approximates the temperatures and the physical properties of the fluid (density and heat capacity). An advantage of the interface is the easy manipulation of the actuator for an automatic or manual operation. Another advantage of the monitoring and control interface is that all algorithms can be manipulated and modified by the users.

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Section: Resultsmentioning

confidence: 99%

Monitoring and Control Interface Based on Virtual Sensors

Escobar

Medina

Beltrán

et al. 2014

Sensors

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“…Boundary condition Inlet hot water (1) Inlet mass flow rate: 4LPM Inlet temperature: 55°C Outlet hot water (2) Outflow Inlet cold water (3) Inlet mass flow rate: 8LPM Inlet temperature: 31.5°C Outlet cold water (4) Outflow…”

Section: Table 2 Details Of Boundary Conditions Locationmentioning

confidence: 99%

“…A heat exchanger is a typical device for transferring energy from one medium to another. There are several heat exchanger types available today, including shell and tube heat exchangers (STHE), plate heat exchangers (PHE), plate fin heat exchangers (PFHE), pillow plate heat exchangers (PPHE), and plate and shell heat exchangers (PAHE) [1]. They are widely applied in power plants, air conditioning, chemical plants, oil refineries, sewage treatment plants, petrochemical plants, and other chemical processes.…”

Section: Introductionmentioning

confidence: 99%

Simulation of shell and tube heat exchanger using COMSOL software

Nguyen

Ngoc

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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The aim of this paper is to propose a model to simulate the behaviour of water flows in shell and tube heat exchanger. Particularly, the continuity equation, the general heat transfer equations and the energy equation in COMSOL Multiphysics software were implemented in the numerical modelling. Besides, the experiment was also conducted to validate the proposed COMSOL model. The water temperature at locations close to the inlet and outlet of the shell side was respectively predicted at 31.5°C and 34.6°C in the simulation, and it was respectively measured at 31.5°C and 35°C in the experiment. These findings showed that the simulation results had a good agreement with the experiment. Next, this model was extended to simulate the overall heat coefficient and the pressure drops of the water flows in such heat exchanger. The overall heat coefficient was at 736.62 W/m2K. The pressure drops at the inlet/outlet areas of the shell and tubes were at 849.93 Pa and 6255.50 Pa, respectively. Conclusive evidence showed that the proposed model is a reliable method for studying the heat transfer behaviour of the shell and heat exchanger.

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