Liquid nitrogen energy storage for air conditioning and power generation in domestic applications
Liquid nitrogen energy storage for air conditioning and power generation in domestic applications
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DOI：
10.1016/j.enconman.2016.09.063
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发表时间：
2016-11
影响因子：
10.4
通讯作者：
A. Ahmad;R. AL-Dadah;S. Mahmoud
中科院分区：
文献类型：
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作者：
A. Ahmad;R. AL-Dadah;S. Mahmoud
在过去的几十年里，全球对空调的需求迅速增长，导致了大量的电力消耗和二氧化碳排放。目前的空调系统使用机械蒸汽压缩系统，这种系统消耗大量能源，特别是在高峰时段，并且使用的制冷剂具有比二氧化碳更高的全球变暖潜力。本文提出了一种利用非高峰时段剩余电力产生的液氮或可再生能源提供空调和电力的新方法。对不同的低温循环进行了热力学分析，以实现最有效的配置，为利比亚170万平方米的住宅提供所需的冷却和电力，消耗的LN2最少。结果表明，在目前的LN2价格下，使用LN2来满足住宅建筑的制冷和电力需求是可行的，与传统的空调系统相比，可以节省高达28%的成本。然而，随着LN2的价格降至每升1.3便士左右，与交流系统相比，拟议的技术将具有显著的优势，节省高达79%的成本，并回收LN2中存储的近85%的能量。
The global demands for air conditioning have increased rapidly over the last few decades leading to significant power consumption and CO2emissions. Current air conditioning systems use mechanical vapour compression systems which consume significant amount of energy particularly during peak times and use refrigerants that have global warming potential higher than that of carbon dioxide. This paper presents a new approach for providing air conditioning and power using liquid nitrogen produced from surplus electricity at off peak times or renewable energy sources. Thermodynamic analyses of different cryogenic cycles was carried out to achieve the most effective configuration that provides the required cooling and power for a 170 m2dwelling in Libya with minimum LN2consumption. Results showed that at today LN2prices, it is feasible to use LN2to provide for cooling and power demands of residential buildings with saving of up to 28% compared to conventional AC systems. However, as the LN2price decreases to around 1.3 pence per litre, the proposed technology will have significant advantages compared to AC systems with savings of up to 79% with almost 85% of the energy stored in LN2is recovered.