A general steady state mathematical model for fin-and-tube heat exchanger based on graph theory

Liu, Jian; Wei, Wenjian; Ding, GouLiang; Zhang, Chun‐Lu; Fukaya, Masaharu; Wang, Kaijian; Inagaki, Takefumi

doi:10.1016/j.ijrefrig.2004.06.008

Cited by 68 publications

(27 citation statements)

References 15 publications

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“…(a) Wang(A) [5] (b) Wang(C) [5] (c) Wang(E) [5] (d) Wang(F) [5] (e) Wang(G) [5] (f ) Ge(A) [6] (g) Ge(B) [6] (h) Kuo(A) [4] (i) Kuo(B) [4] (j) Ge [7] (k) Liu [2] (l) Domanski [8] Figura 15: Ejemplos de circuitos validados.…”

Section: Validación De Los Resultadosmentioning

confidence: 99%

“…Esta secuencia se puede realizar de diferentes formas, por ejemplo Ding [1] simplemente hizo uso de cuatro estructuras de datos para relacionar toda la información, mientras que Liu [2] hace uso de la teoría de grafos para relacionar la topología del intercambiador. El presente trabajo hace uso de la teoría de grafos de forma muy similar al trabajo de Liu, pero con ciertas modificaciones que le dan más flexibilidad, como es la mejora de los datos de la matriz adjunta, uso de una versión modificada de búsqueda de profundidad (en inglés DFS o Depth First Search) y que cada nodo y camino tiene su propia estructura de datos como se explica a continuación.…”

Section: Conexionado De Los Tubosunclassified

See 1 more Smart Citation

Procedimiento para el cálculo de circuitos en el modelado del flujo en intercambiadores de calor de aletas y tubos

Córdoba-Tuta

Fuentes-Díaz

2015

ing.cienc

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En este trabajo se presenta un procedimiento general para la simulación del comportamiento del flujo en los intercambiadores de tubos y aletas con una gran flexibilidad en el manejo de la información. Este procedimiento está basado en el uso de Programación Orientada a Objetos y específicamente al uso de C++, esto debido a todas las ventajas de este tipo de programación. La entrada de datos se lleva a cabo por medio de archivos, de forma que programas de terceros puedan generar la configuración del intercambiador y permitir calcular el intercambiador en forma paramétrica. Los resultados para el análisis se presentan en tres formatos diferentes: valores separados por comas (CSV), texto plano estructurado y autodocumentado (XML) y un formato para la visualización gráfica de resultados (VTK).

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Section: Validación De Los Resultadosmentioning

confidence: 99%

Section: Conexionado De Los Tubosunclassified

Procedimiento para el cálculo de circuitos en el modelado del flujo en intercambiadores de calor de aletas y tubos

Córdoba-Tuta

Fuentes-Díaz

2015

ing.cienc

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“…Circuiting arrangements with several refrigerant inlets and junctions were not fully taken care of, so that the user must fix a mass flux of the refrigerant in each inlet and in the process, the thermal-hydrodynamic coupling is lost, affecting the results. (Liu et al, 2004) developed a steady state model based on the pass-by-pass approach, accounting for heat conduction between adjacent tubes and circuitry by means of a matrix that fixes the configuration. (Jiang et al, 2006) proposed CoilDesigner, in the form of easy-to-use software.…”

Section: Circuitingmentioning

confidence: 99%

“…Another interesting indexing technique for complex circuitry was proposed by (Kuo et al, 2006). It is based on a connectivity matrix similar to those used in (Liu et al, 2004) and (Jiang et al, 2006) but introduces additional indices to indicate the number of main flows, first and second level circuitry. The related model is of distributed type for cooling with dry and wet conditions.…”

Section: Circuitingmentioning

confidence: 99%

Numerical Modeling and Experimentation on Evaporator Coils for Refrigeration in Dry and Frosting Operational Conditions

Aidoun¹,

Ouzzane²,

Bendaoud³

2011

Two Phase Flow, Phase Change and Numerical Modeling

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“…Lots of simulation technologies were used to substitute CFCs since the late 1980s [14][15][16][17][18][19][20] . Artificial intelligence technologies [21 -24] and graph theory [25] were introduced into simulation of refrigeration and air-conditioning appliances at the end of the 1990s, which further enriched the simulation methods.In this paper, the state-of-art of simulation technology for refrigeration and air-conditioning appliances is reviewed and the trend of simulation technology for refrigeration and air-conditioning appliances is discussed. …”

mentioning

confidence: 99%

Simulation technology for refrigeration and air conditioning appliances

Ding

2006

CHINESE SCI BULL

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Simulation technology has been widely used for performance prediction and optimal design of refrigeration and air conditioning appliances. A brief history of simulation technology for refrigeration and air conditioning appliances is reviewed. The models for evaporator, condenser, compressor, capillary tube and thermal insulation layer are summarized, and a fast calculation method for thermodynamic properties of refrigerant is introduced in this paper. The model-based intelligent simulation technology and the simulation technology based on graph theory are also illustrated. Finally, an updated trend of simulation technology development for refrigeration and air conditioning appliances is discussed.The output of refrigeration and air-condition appliances have been increasing rapidly in recent years, especially in China. For example, the annual output of room air conditioners in China is over two thirds of the world total, and the use of air conditioners consumes a lot of electricity, amounting up to 40% of the total electricity consumption in the summer in some cities like Shanghai. Therefore it is an important target to make the design process of refrigeration appliances more efficiently and to improve the product performance. Computer simulation technique is one of valuable means to accomplish this target [1][2][3] .The traditional methods for designing refrigeration and air-conditioning appliances are: to determine the required performance object of a product at first, then to estimate the working conditions, and to calculate the structural parameters at last. This process is very straightforward and quite easy to be understood. But the actual performance of the product might obviously deviate from the required one because there is no accurate model available in the design process. In order to let the products have the desired performance, the processes of developing prototypes, testing their performance and modifying their structures have to be repeated many times, which will increase the cost and delay the completion of the design process.With the computer simulation method, the working conditions and the structural parameters of the product are given, and then the performance is predicted. After predicting the product performance by simulation, the configuration parameters of the product can be evaluated easily. In order to get a group of suitable configuration parameters of the product, the original parameters should be adjusted according to the simulated results, and simulation with the adjusted structural parameters will be done again. The process of modifying the parameters and simulating with modified parameters will be repeated many times until a set of the most suitable parameters is obtained. Such a computation process is an optimization process, which can be implemented by adding some optimization programs or directly operated by users based on their experience. In order to obtain a perfect optimization result quickly, the initial parameters should not be far away from the optimal ones. It is recomme...

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A general steady state mathematical model for fin-and-tube heat exchanger based on graph theory

Cited by 68 publications

References 15 publications

Procedimiento para el cálculo de circuitos en el modelado del flujo en intercambiadores de calor de aletas y tubos

Procedimiento para el cálculo de circuitos en el modelado del flujo en intercambiadores de calor de aletas y tubos

Numerical Modeling and Experimentation on Evaporator Coils for Refrigeration in Dry and Frosting Operational Conditions

Simulation technology for refrigeration and air conditioning appliances

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