Dynamic simulation and performance investigation of no-frost refrigerator: Part I mathematical model |
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| Authors: | Xiu-ping Su Jiang-ping Chen Zhi-jiu Chen Xiao-tian Zhou |
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| Institution: | (1) Institute of Refrigeration and Cryogenics, Shanghai Jiaotong University, Shanghai, 200240, China;(2) BSH Bosch and Siemens Cooling Appliances Co., Ltd., Chuzhou, 239016, Anhui, China |
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| Abstract: | A dynamic approach for the modeling, simulation and analysis of no-frost Refrigerator (RF) is discussed. In Part I, the complex
interactions among the components in the cooling system are analyzed in detail, based on which the modeling simplifications
are proposed. Then, the mathematical models for the evaporator, cabinet and duct-fan are presented. The whole system is divided
into two subsystems—refrigerant cycling system and air cycling system. In order to simplify the model, two closed-loop systems
are broken into the compressor component and the evaporator component, respectively. A general distributed parameter model
is employed for evaporator with homogeneous flow to simplify the two-phase evaporating flow region. The z-transfer function model is used to describe the cabinet load. Computational fluid dynamics (CFD) method is employed to obtain
the pressure drop and flow rate curve of the duct-fan model.
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| Keywords: | no-frost refrigerator-freezer dynamic simulation |
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