Cooling load and coefficient of performance optimizations for real air-refrigerators

You-ming, TU; Chen, Lingen; Sun, Fengrui; Chen, Wu

doi:10.1016/j.apenergy.2006.03.003

Cited by 29 publications

(12 citation statements)

References 21 publications

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“…Combining Equations (6) and (7) yields: (8) Consider that the heat transfers between the refrigerator and its surroundings obey Newton's linear law: (9) and: (10) We define a heat transfer surface area ratio (f):…”

Section: Optimization For Irreversible Refrigeratormentioning

confidence: 99%

Performance Optimization of Generalized Irreversible Refrigerator Based on a New Ecological Criterion

Pang

Wang

2013

Entropy

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Abstract:On the basis of the exergy analysis, a performance optimization is carried out for a generalized irreversible refrigerator model, which takes into account the heat resistance, heat leakage and internal irreversibility losses. A new ecological criterion, named coefficient of performance of exergy (COPE), defined as the dimensionless ratio of the exergy output rate to the exergy loss rate, is proposed as an objective function in this paper. The optimal performance factors which maximize the ecological objective function have been discussed. Numerical examples are given to explain the influences of heat leakage and internal irreversibility on the generalized and optimal performances. This new ecological criterion may be beneficial for determining the reasonable design of refrigerators.

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Section: Optimization For Irreversible Refrigeratormentioning

confidence: 99%

Performance Optimization of Generalized Irreversible Refrigerator Based on a New Ecological Criterion

Pang

Wang

2013

Entropy

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“…In conclusion, the slope dZ II /dD is positive and decreases as D increases. With this trend taken into account, Equation (8) shows that the length scale of the area can be selected such that the cooling rate per user is maximal. The optimal length scale of the area allocated to one refrigeration installation (D opt ) is obtained by differentiating Equation (8) with respect to D, and setting it equal to 0.…”

Section: Allocation Of Area To One Refrigeration Plantmentioning

confidence: 99%

Constructal design of distributed cooling on the landscape

Liang

Lorente

Bejan

2010

Int. J. Energy Res.

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SUMMARYHere we constructal design to determine the area size (or number of users N) to be allocated to a central refrigeration plant, and to configure the distribution network for the distributed cooling system. The main objective is to maximize the net cooling capacity delivered to every user, and to minimize the pumping power required for transporting the chilled water. Two types of distribution networks are investigated: radial and tree-shaped networks. First, when ducts with a single diameter are used, the net cooling capacity delivered to every user is almost the same, while the pumping power requirement for the tree network is greater than that for the radial network. Multi-diameter tree networks are investigated next. The pumping power requirement for multi-diameter tree-shaped network is less than for radial network when N is greater than 19 if the flow is laminar, and when N is greater than 80 if the flow is turbulent. The global performance of the area-based cooling system can be improved by increasing the freedom to morph the configuration.

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“…According to Fig. 1, one may introduce the compression and expansion efficiencies [16][17][18][19][20][21][22][23][24][25][26][27] …”

Section: An Irreversible Brayton Refrigeration Cyclementioning

confidence: 99%

Influence of multi-irreversibilities on the performance of a Brayton refrigeration cycle working with an ideal Bose or Fermi gas

Liu

Lin

et al. 2008

International Journal of Thermal Sciences

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Cooling load and coefficient of performance optimizations for real air-refrigerators

Cited by 29 publications

References 21 publications

Performance Optimization of Generalized Irreversible Refrigerator Based on a New Ecological Criterion

Performance Optimization of Generalized Irreversible Refrigerator Based on a New Ecological Criterion

Constructal design of distributed cooling on the landscape

Influence of multi-irreversibilities on the performance of a Brayton refrigeration cycle working with an ideal Bose or Fermi gas

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