Carbon dioxide as refrigerant for tap water heat pumps: A comparison with the traditional solution
Carbon dioxide as refrigerant for tap water heat pumps: A comparison with the traditional solution
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DOI：
10.1016/j.ijrefrig.2005.05.019
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发表时间：
2005-12
期刊：
影响因子：
--
通讯作者：
L. Cecchinato;M. Corradi;E. Fornasieri;L. Zamboni
中科院分区：
文献类型：
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作者：
L. Cecchinato;M. Corradi;E. Fornasieri;L. Zamboni
对制冷技术的环境影响的日益关注导致设计解决方案，旨在提高相关应用的能源效率，使用生态友好型制冷剂，即臭氧友好型和全球变暖潜能值（GWP）最小。在这方面，二氧化碳（ASHRAE R744）今天被视为最有前途的制冷剂之一，并在工业和科学领域引起了极大的兴趣。在目前的工作中，工厂的选择进行了调查，这是有关的空气/水热泵的自来水使用二氧化碳的设计。在能源效率方面，在使用CO2的系统和使用HFC R134 a的类似系统之间进行了比较;通过制冷机/热泵的模拟模型进行了这种比较，其特征在于基于其细分为基本体积的热交换器的详细表示。结果表明，二氧化碳是一个有趣的替代合成流体，如果系统的设计集中利用其属性。
Increased concern about the environmental impact of the refrigeration technology is leading toward design solutions aimed at improving the energy efficiency of the related applications, using eco-friendly refrigerants, i.e. ozone-friendly and with the least possible global warming potential (GWP). In this respect, carbon dioxide (ASHRAE R744) is seen today as one of the most promising refrigerants and is raising great interest in industrial and scientific fields. In the present work, the plant options are investigated, which are related to the design of air/water heat pumps for tap water using CO2. A comparison is made, in terms of energy efficiency, between a system working with CO2and a similar one working with HFC R134a; such a comparison is carried out by means of a simulation model of a refrigerating machine/heat pump, characterized by a detailed representation of the heat exchangers, based on their subdivision into elementary volumes. Results show that carbon dioxide is an interesting substitute for synthetic fluids, if the design of the system is focused to take advantage of its properties.