An empirical model for independent control of variable speed refrigeration system

Li, Hua; Jeong, Seok–Kwon; Yoon, Jung-In; You, Sam–Sang

doi:10.1016/j.applthermaleng.2007.12.008

Cited by 37 publications

(26 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The method has been proposed to improve the coefficient of performance (COP) by matching the compressor capacity to the load, replacing the classical thermostatic control. A similar work has been performed by [10] to provide an excellent transient characteristics by using a decoupling model. Although the latter two methods can be applied to a single vapor compression cycle (VCR), they are not applicable to the multi-evaporator systems in supermarkets.…”

Section: Introductionmentioning

confidence: 98%

“…The modularity of the model makes it possible to simply add the freezing rooms and low stage compressors to the model. There is no need to do changes in the model since the mass flow of this section is already included in the disturbance mass flow in Equation (10). The estimated parameters for the total four freezing rooms are collected in Table 3.…”

Section: System Integration and Simulation Benchmarkmentioning

confidence: 99%

“…We can estimate the compressor capacity such that the suction pressure and low-side pressure are regulated to predefined set-points. For this purpose, the compressor capacity should provide a volume flow in Equation (11) that keeps Equation (10) equal to zero at the desired pressure set-point. The result illustrated in Figure 12 justifies that the proposed estimation method is nearly the same as what is used in the real system.…”

Section: System Integration and Simulation Benchmarkmentioning

confidence: 99%

See 2 more Smart Citations

Modeling Supermarket Refrigeration Systems for Demand-Side Management

2013

View full text Add to dashboard Cite

Modeling of supermarket refrigeration systems for supervisory control in the smart grid is presented in this paper. A modular modeling approach is proposed in which each module is modeled and identified separately. The focus of the work is on estimating the power consumption of the system while estimating the cold reservoir temperatures as well. The models developed for each module as well as for the overall integrated system are validated by real data collected from a supermarket in Denmark. The results show that the model is able to estimate the actual electrical power consumption with a high fidelity. Moreover a simulation benchmark is introduced based on the produced model for demand-side management in smart grid. Finally, a potential application of the proposed benchmark in direct control of the power/energy consumption is presented by a simple simulation example.

show abstract

Section: Introductionmentioning

confidence: 98%

Section: System Integration and Simulation Benchmarkmentioning

confidence: 99%

Section: System Integration and Simulation Benchmarkmentioning

confidence: 99%

See 1 more Smart Citation

Modeling Supermarket Refrigeration Systems for Demand-Side Management

2013

View full text Add to dashboard Cite

show abstract

“…In this study, the controllers are designed as decoupled ones without interfering loops (Li et al, 2008). In the experimental setup used in this study, there were some limitations of the equipment.…”

Section: Applications Of the Controllersmentioning

confidence: 99%

Operation of Compressor and Electronic Expansion Valve via Different Controllers

Ekren¹,

Şahin²,

İşler³

2012

Fuzzy Logic - Controls, Concepts, Theories and Applications

View full text Add to dashboard Cite

“…However, sometimes this type of model is not sufficient and flexible enough to catch the key dynamic characteristics of complex system under diverse operating conditions. For instance, Gralda and MacArthur (1992); Li et al (2008); Rasmussen and Larsen (2009) have discovered that system parameters, such as the system gain, time-constant and time-delay, in a standard FOPDT formulation of the transient superheat dynamic can be time-varying. In order to keep the FOPDT model's merit, but, meanwhile be able to correctly reflect system's key transient dynamics, Sun and Yang (2011); Yang and Sun (2011) proposed a type of nonlinear FOPDT model, named Time-Varying FOPDT (TV-FOPDT), to model the transient superheat dynamic in a refrigeration system.…”

Section: Introductionmentioning

confidence: 99%

Time-Varying FOPDT Modeling and On-line Parameter Identification

Yang

Sun

2013

IFAC Proceedings Volumes

View full text Add to dashboard Cite

Abstract:A type of Time-Varying First-Order Plus Dead-Time (TV-FOPDT) model is extended from SISO format into a MISO version by explicitly taking the disturbance input into consideration. Correspondingly, a set of on-line parameter identification algorithms oriented to MISO TV-FOPDT model are proposed based on the Mixed-Integer-Nonlinear Programming, Least-MeanSquare and sliding window techniques. The proposed approaches can simultaneously estimate the time-dependent system parameters, as well as the unknown disturbance input if it is the case, in an on-line manner. The proposed concepts and algorithms are firstly illustrated through a numerical example, and then applied to investigate transient superheat dynamic modeling in a supermarket refrigeration system.

show abstract

An empirical model for independent control of variable speed refrigeration system

Cited by 37 publications

References 7 publications

Modeling Supermarket Refrigeration Systems for Demand-Side Management

Modeling Supermarket Refrigeration Systems for Demand-Side Management

Operation of Compressor and Electronic Expansion Valve via Different Controllers

Time-Varying FOPDT Modeling and On-line Parameter Identification

Contact Info

Product

Resources

About