Energy and environmental performance assessment of R744 booster supermarket refrigeration systems operating in warm climates
Energy and environmental performance assessment of R744 booster supermarket refrigeration systems operating in warm climates
复制标题
DOI：
10.1016/j.ijrefrig.2015.12.016
复制
发表时间：
2016-04-01
期刊：
影响因子：
--
通讯作者：
Cortella, Giovanni
中科院分区：
文献类型：
--
作者：
Gullo, Paride;Elmegaard, Brian;Cortella, Giovanni
本文从年能耗和环境影响两个方面对不同商用制冷系统进行了理论比较。研究了八种构型：一个R744/R134 a复叠制冷系统（基线）、一个传统的和一个改进的R744增压器系统、两个具有专用机械过冷的R744增压器解决方案、一个具有并联压缩的R744增压器以及两个将并联压缩和机械过冷相结合的解决方案。评估是基于瓦伦西亚（西班牙）和雅典（希腊）的天气数据，以及传统的欧洲超市的运行模式。结果表明，在两个选定的位置，所有的增强配置都可以实现与基准配置相当的节能效果。此外，除了级联解决方案外，它们还可以将总等效变暖影响（TEWI）降低至少9.6%。(C)2016 Elsevier Ltd和IIR。All rights reserved.
This paper presents a theoretical comparison among different commercial refrigeration systems in terms of annual energy consumption and environmental impact. Eight configurations were studied: a R744/R134a cascade refrigeration system (baseline), a conventional and an improved R744 booster system, two R744 booster solutions with dedicated mechanical subcooling, a R744 booster with parallel compression and two solutions which combined the parallel compression and the mechanical subcooling. The evaluation was based on the weather data in Valencia (Spain) and in Athens (Greece), as well as on the running modes of a conventional European supermarket. A transition zone, which occurred between sub critical and transcritical operations, was adopted.The results showed that all the enhanced configurations may achieve a comparable energy saving to the one of the baseline in both the selected locations. Furthermore, they allow reducing the Total Equivalent Warming Impact (TEWI) by at least 9.6% beside the cascade solution. (C) 2016 Elsevier Ltd and IIR. All rights reserved.