Development of a design tool for display case evaporators

Chandrasekharan, Ramesh; Verma, Parmesh; Bullard, Clark W.

doi:10.1016/j.ijrefrig.2005.10.012

Cited by 13 publications

(3 citation statements)

References 8 publications

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“…The variation of refrigerant temperature across evaporator (with phase change process) is reduced [54], so its value can be considered constant. It is assumed no superheating of refrigerant, and all heat transfer is on the two-phase zone at constant temperature.…”

Section: Heat and Mass Transfer And Pressure Dropmentioning

confidence: 99%

Detailed CFD Modelling of Open Refrigerated Display Cabinets

Gaspar

Gonçalves

Pitarma

2012

Modelling and Simulation in Engineering

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A comprehensive and detailed computational fluid dynamics (CFDs) modelling of air flow and heat transfer in an open refrigerated display cabinet (ORDC) is performed in this study. The physical-mathematical model considers the flow through the internal ducts, across fans and evaporator, and includes the thermal response of food products. The air humidity effect and thermal radiation heat transfer between surfaces are taken into account. Experimental tests were performed to characterize the phenomena near physical extremities and to validate the numerical predictions of air temperature, relative humidity, and velocity. Numerical and experimental results comparison reveals the predictive capabilities of the computational model for the optimized conception and development of this type of equipments. Numerical predictions are used to propose geometrical and functional parametric studies that improve thermal performance of the ORDC and consequently food safety.

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Section: Heat and Mass Transfer And Pressure Dropmentioning

confidence: 99%

Detailed CFD Modelling of Open Refrigerated Display Cabinets

Gaspar

Gonçalves

Pitarma

2012

Modelling and Simulation in Engineering

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“…According to Xie et al (2006), the model can be used to predict the behavior of air flows in cold chambers. Details regarding the implementation and validation of the k-ɛ turbulence model can be found in the works by Launder and Spalding (1974), Rodi (1980), and Chandrasekharan and Bullard (2005).…”

Section: Turbulence Modelmentioning

confidence: 99%

Simulation of air flow in cold chambers using the openfoam computational fluid dynamics (CFD) software

Jose¹,

Barbara²,

Luiz³

2014

Afr. J. Agric. Res.

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This work applied the mathematical models already implemented in the OpenFOAM ® computational fluid dynamics (CFD) software, to simulate two proposed air distributions inside cold chambers. The OpenFOAM ® software was chosen because of the absence of licensing costs associated with its use, compared to the major commercial CFDsoftwares available. In the pre-processing phase, we used the free Google SketchUp ® software for the virtual design of the prototypes, and the free enGrid ® software for the discretization of these virtual prototypes; later the resulting grids were used, by the OpenFOAM ® , in the post-processing phase.

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“…However, there is no difference evident in the air side calculations in the application of the same type of heat exchanger such as finned-tube. A model for simulating a finned-tube display case evaporator was developed with the expectation for the model to be used as a design tool to implement the improvement of evaporator performance at different frosting conditions [16]. The various states of the evaporator air inlet were determined by the designed airflow rates and fixed loads although the actual methods to determine and calculate the loads were not given in the paper.…”

Section: Introductionmentioning

confidence: 99%

Simulation of multi-deck medium temperature display cabinets with the integration of CFD and cooling coil models

Ge¹,

Tassou²,

Hadawey³

2010

Applied Energy

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In this paper, the model for the multi-deck medium temperature display cabinets is developed with the integration of CFD and cooling coil sub-models. The distributed method is used to develop the cooling coil model with the airside inputs from the outputs of the CFD model. Inversely, the airside outputs from the cooling coil model are used to update the boundary conditions of the CFD model. To validate this cabinet model, a multi-deck medium temperature display cabinet refrigerated with a secondary refrigerant cooling coil was selected as a prototype and mounted in an air conditioned chamber. Extensive tests were conducted at constant space air temperature and varied  humidity ratio

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Development of a design tool for display case evaporators

Cited by 13 publications

References 8 publications

Detailed CFD Modelling of Open Refrigerated Display Cabinets

Detailed CFD Modelling of Open Refrigerated Display Cabinets

Simulation of air flow in cold chambers using the openfoam computational fluid dynamics (CFD) software

Simulation of multi-deck medium temperature display cabinets with the integration of CFD and cooling coil models

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