Energy saving potential of two-stage compression dual-temperature air conditioning system

被引：3

作者：

Yu L. ^{[1
]}

Ren C. ^{[1
]}

Yang Y. ^{[1
]}

Wan Y. ^{[1
]}

Wang Z. ^{[1
]}

机构：

[1] College of Mechanical and Vehicle Engineering, Hunan University, Changsha

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2019年 / 50卷 / 10期

关键词：

Dual-temperature air conditioning system; Energy saving potential; Two-stage compression;

D O I：

10.11817/j.issn.1672-7207.2019.10.027

中图分类号：

学科分类号：

摘要：

Aiming at the problems caused by the heat and moisture coupling processing of traditional air conditioning systems, an innovative two-stage dual-temperature air conditioning system was proposed. The new air-conditioner was comprised of two compressors, two evaporators(high temperature evaporator and low temperature evaporator), a condenser and two throttles. Mathematical model of the proposed air conditioning system was established using Simulink software, and the models of heat exchanger and compressor were validated. The influences of the heat exchange area ratio(RA) of high temperature evaporator and low temperature evaporator on the coefficient of performance(COP) of the air conditioning system were analyzed, and COP and energy saving potential of the proposed air conditioning system were calculated. The results show that COP increases first and then decreases in the conditions of fixed total area of the two evaporators when RA increases. Moreover, when the outdoor air temperature or relative humidity reduces, COP increases gradually, and the maximum COP is 6.32.Compared to the conventional air conditioning system with fresh air, the energy saving potential of two-stage compression dual-temperature air conditioning system is from 12.60% to 30.97% in cooling conditions and reaches 16.74% during the whole cooling season. © 2019, Central South University Press. All right reserved.

引用

页码：2595 / 2602

页数：7

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