Dynamic modeling of refrigerated transport systems with cooling-mode/heating-mode switch operations

This article presents dynamic modeling approaches to predict system performance characteristics of cooling-/heating-mode switch cycling operation, a commonly used temperature regulation approach in refrigerated transport systems. A dynamic model of a commercially available transport refrigeration system is presented, which describes the system dynamics during the mode switch transients. The development of the heat exchanger and accumulator models is highlighted using the switched modeling framework. Model validation against experimental data demonstrates the capabilities of the modeling approach in representing the transient behavior of the mode switch process. Simulation case studies to predict refrigerant mass distribution during transients and system performance with the influence of door-opening events are also provided to demonstrate modeling capabilities. The presented dynamic modeling framework can serve as a valuable tool to evaluate performance with different system configurations and operating strategies in transport refrigeration applications.

[1]  Morten Willatzen,et al.  A general dynamic simulation model for evaporators and condensers in refrigeration. Part II: simulation and control of an evaporator , 1998 .

[2]  P. G. Jolly,et al.  Simulation and measurement on the full-load performance of a refrigeration system in a shipping container , 2000 .

[3]  Liang-Liang Shao,et al.  Logic unconstrained multi-zone evaporator and condenser models , 2007 .

[4]  Luca Cecchinato,et al.  An intrinsically mass conservative switched evaporator model adopting the moving-boundary method , 2012 .

[5]  Andrew G. Alleyne,et al.  Hardware-in-the-Loop Load Emulation for Air Conditioning and Refrigeration Systems , 2010 .

[6]  H. Harry Asada,et al.  Modeling of Vapor Compression Cycles for Multivariable Feedback Control of HVAC Systems , 1997 .

[7]  Bin Li,et al.  Optimal on–off control of refrigerated transport systems , 2010 .

[8]  James E. Braun,et al.  A comparison of moving-boundary and finite-volume formulations for transients in centrifugal chillers , 2008 .

[9]  C. James,et al.  Modelling of food transportation systems - a review , 2006 .

[10]  Andrew G. Alleyne,et al.  Real-Time Modeling of Liquid Cooling Networks in Vehicle Thermal Management Systems , 2008 .

[11]  Neil Hewitt,et al.  Defrost cycle performance for a circular shape evaporator air source heat pump , 2008 .

[12]  Guoliang Ding,et al.  Transient modeling of an air-cooled chiller with economized compressor. Part I: Model development and validation , 2009 .

[13]  Douglas T. Reindl,et al.  Hot gas defrost model development and validation , 2005 .

[14]  Savvas A. Tassou,et al.  Food transport refrigeration – Approaches to reduce energy consumption and environmental impacts of road transport , 2009 .

[15]  Fu-Yun Zhao,et al.  Dynamic simulation of air-source heat pump during hot-gas defrost , 2003 .

[16]  Hubertus Tummescheit,et al.  Moving Boundary Models for Dynamic Simulations of Two-Phase Flows , 2002 .

[17]  S. Jain,et al.  Transient Characteristics of Split Air-Conditioning Systems Using R-22 and R-410A as Refrigerants , 2009 .

[18]  Ju-Suk Byun,et al.  Frost retardation of an air-source heat pump by the hot gas bypass method , 2008 .

[19]  Honghyun Cho,et al.  Performance of a showcase refrigeration system with multi-evaporator during on–off cycling and hot-gas bypass defrost , 2005 .

[20]  S. Zivi.  Estimation of Steady-State Steam Void-Fraction by Means of the Principle of Minimum Entropy Production , 1964 .

[21]  Jonas Eborn,et al.  AirConditioning - a Modelica Library for Dynamic Simulation of AC Systems , 2005 .

[22]  Andrew G. Alleyne,et al.  An advanced nonlinear switched heat exchanger model for vapor compression cycles using the moving-boundary method , 2008 .

[23]  Ricardo Nicolau Nassar Koury,et al.  Numerical simulation of a variable speed refrigeration system , 2001 .

[24]  Dirk Limperich,et al.  System Simulation of Automotive Refrigeration Cycles , 2005 .

[25]  J. Chato,et al.  Condensation in Smooth Horizontal Tubes , 1998 .

[26]  Shuangquan Shao,et al.  Dynamic simulation of variable capacity refrigeration systems under abnormal conditions , 2010 .

[27]  Renzo Akkerman,et al.  Quality, safety and sustainability in food distribution: a review of quantitative operations management approaches and challenges , 2010, OR Spectr..

[28]  José Fernández-Seara,et al.  Modelling and experimental validation of the hot-gas defrost process of an air-cooled evaporator , 2010 .

[29]  Andrew G. Alleyne,et al.  A dynamic model of a vapor compression cycle with shut-down and start-up operations , 2010 .

[30]  Andrew G. Alleyne,et al.  Dynamic Modeling and Advanced Control of Air Conditioning and Refrigeration Systems , 2006 .

[31]  Minglu Qu,et al.  A study of the reverse cycle defrosting performance on a multi-circuit outdoor coil unit in an air source heat pump – Part I: Experiments , 2012 .

[32]  P. G. Jolly,et al.  A comparison of hot-gas by-pass and suction modulation method for partial load control in refrigerated shipping containers , 2001 .

[33]  W. A. Miller,et al.  Laboratory examination and seasonal analysis of frosting and defrosting for an air-to-air heat pump , 1987 .

[34]  R. M. Manglik,et al.  Heat transfer and pressure drop correlations for the rectangular offset strip fin compact heat exchanger , 1995 .

[35]  Andrew G. Alleyne,et al.  Refrigerant mass migration modeling and simulation for air conditioning systems , 2011 .

[36]  Andrew G. Alleyne,et al.  Control-Oriented Modeling of Transcritical Vapor Compression Systems , 2004 .

[37]  Valentín,et al.  Chapter 2. , 1998, Annals of the ICRP.

[38]  Chun-Lu Zhang,et al.  A generalized moving-boundary model for transient simulation of dry-expansion evaporators under larger disturbances , 2006 .

[39]  J. Wattelet,et al.  Heat Transfer Flow Regimes of Refrigerants in a Horizontal-Tube Evaporator , 1994 .