Transient cycle simulation of domestic appliances and experimental validation

Heimel, Martin; Berger, Erwin; Posch, Stefan; Stupnik, Axel; Hopfgartner, Johann Wilfried; Almbauer, Raimund

doi:10.1016/j.ijrefrig.2016.06.007

Cited by 8 publications

(2 citation statements)

References 26 publications

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“…Although a systematic assessment of refrigerated cabinets for caloric cooling systems is still lacking in the literature, one expects that the basic design and evaluation procedures will follow those normally adopted for conventional cooling technologies. To date, several models have been proposed to describe the steady-state (Gonçalves et al 2009, Tagliafico et al 2012, Zsembinszki et al 2017) and dynamic behavior of household refrigerators using quasi-steady and fully transient approaches (Chen & Lin 1991, Janssen et al 1992, Hermes & Melo 2008, Borges et al 2011, Martinez-Ballester et al 2012, Mastrullo et al 2014, Heimel et al 2016). In the case of a wine cooler, the presence of a glass door should require a different treatment for the overall thermal conductance of the cabinet insulation if the thermal leakage through the former needs to be quantified separately.…”

Section: Introductionmentioning

confidence: 99%

Temperature pull-down of a retrofitted wine refrigerator cabinet cooled by a caloric system emulator

Calomeno

Dutra

Sá

et al. 2022

An. Acad. Bras. Ciênc.

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The present study analyzes the time-dependent thermal behavior of a retrofitted wine refrigerator cabinet operated by a caloric system emulator. The presence of a full load of wine bottles enabled the assessment of the thermal stratification inside the cabinet. Further experimental tests have been performed to quantify the overall thermal conductance of the cabinet walls and the thermal conductance of the glass door. A detailed mathematical model was developed to predict the temperature pull down in the refrigerated compartment, considering the interaction between the cabinet air and the wine bottles. In addition to the air and bottle temperatures, a good agreement (lower than 15 % relative error) was observed for the cooling capacity. The numerical simulations revealed that the cabinet door was responsible for approximately 60 % of the thermal load (even though it corresponded to approximately 20 % of the cabinet external area).

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Section: Introductionmentioning

confidence: 99%

Temperature pull-down of a retrofitted wine refrigerator cabinet cooled by a caloric system emulator

Calomeno

Dutra

Sá

et al. 2022

An. Acad. Bras. Ciênc.

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“…For a better understanding of the effect of the transient (start-up/shut-down) operating conditions upon the compressor performance, a system simulation model is required. On the one hand, the models developed for vapor compression cycles under on-off conditions are frequently focused on the heat exchangers and the refrigerated compartments (Borges et al, 2015;Heimel et al, 2016), while simplified modeling approaches are commonly adopted for the compressor, which are based on maps of volumetric and overall efficiencies to estimate mass flow rate and power consumption (Ndiaye and Bernier, 2010;Negrao et al, 2011). Just a few works, such as the ones published by Chen and Lin (1991) and Hermes and Melo (2008), presented more elaborate models for the compression cycle, albeit neglecting key aspects of the compressor performance such as valve dynamics and pressure pulsations in the suction and discharge mufflers.…”

Section: Introductionmentioning

confidence: 99%

Transient simulation of small-capacity reciprocating compressors in on-off controlled refrigerators

Diniz

Hermes

Deschamps

2019

International Journal of Refrigeration

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This paper presents a simulation model for the transient behavior of vapor compression refrigerating appliances subjected to on-off control patterns focusing on the reciprocating compressor. A detailed compressor model is put forward based on two sub-models: one for the compression cycle, which can predict the valve dynamics, heat transfer in the compression chamber and the pressure pulsations in mufflers, and the other for the compressor shell, which calculates the temperature and mass flow rate in components other than the compression chamber. The remaining components of the single-door frost-free refrigerator considered in this work (i.e. condenser, evaporator, refrigerated compartment) are modeled based on mass and energy balances considering each component as an even lump. The expansion device and the refrigerant charge sub-models are replaced by prescribed condenser subcooling and evaporator superheating degrees, respectively. The overall cycle simulation model was validated by comparing predictions for the compressor temperatures and mass flow rate, indicated power, power consumption and overall energy consumption with the experimental counterparts measured in a household refrigerator, whose componentsincluding the compressorwere carefully instrumented with thermocouples and pressure transducers, and tested in a climate chamber with a strict control of air temperature, humidity and velocity. Finally, sensitivity analyses were conducted to compare the effect of the compressor design parameters on its performance under calorimeter and actual system conditions.

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Impact of room temperature on energy consumption of household refrigerators: Lessons from analysis of field and laboratory data

2018

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Transient cycle simulation of domestic appliances and experimental validation

Cited by 8 publications

References 26 publications

Temperature pull-down of a retrofitted wine refrigerator cabinet cooled by a caloric system emulator

Temperature pull-down of a retrofitted wine refrigerator cabinet cooled by a caloric system emulator

Transient simulation of small-capacity reciprocating compressors in on-off controlled refrigerators

Impact of room temperature on energy consumption of household refrigerators: Lessons from analysis of field and laboratory data

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