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Air conditioning and power generation for residential applications using liquid nitrogen

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  • Ahmad, Abdalqader
  • Al-Dadah, Raya
  • Mahmoud, Saad

Abstract

Current air conditioning (AC) systems consume a significant amount of energy, particularly during peak times where most electricity suppliers face difficulties to meet the users’ demands, and the global demands for AC systems have increased rapidly over the last few decades leading to significant power consumption and carbon dioxide emissions. This paper presents a new technique that uses liquid nitrogen (LN2) produced from renewable energy sources, or surplus electricity at off peak times, to provide cooling and power for domestic houses. Thermodynamic analyses of various cryogenic cycles have been carried out to achieve the most effective configuration that produces the maximum power output with minimum LN2 flow rate, to meet the required cooling of a 170m2 dwelling in Libya. A comparison with a conventional AC system was also made. Results showed that at the current LN2 prices, using LN2 to provide cooling and power demands of residential buildings is feasible and saves up to 36% compared to conventional air conditioning systems with an overall thermal efficiency of 74%. However, as the LN2 price decreases to around 1.3 pence per kg, the proposed technology will have significant advantages compared to conventional AC systems with savings of up to 81%.

Suggested Citation

  • Ahmad, Abdalqader & Al-Dadah, Raya & Mahmoud, Saad, 2016. "Air conditioning and power generation for residential applications using liquid nitrogen," Applied Energy, Elsevier, vol. 184(C), pages 630-640.
  • Handle: RePEc:eee:appene:v:184:y:2016:i:c:p:630-640
    DOI: 10.1016/j.apenergy.2016.11.022
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    References listed on IDEAS

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    Cited by:

    1. She, Xiaohui & Zhang, Tongtong & Cong, Lin & Peng, Xiaodong & Li, Chuan & Luo, Yimo & Ding, Yulong, 2019. "Flexible integration of liquid air energy storage with liquefied natural gas regasification for power generation enhancement," Applied Energy, Elsevier, vol. 251(C), pages 1-1.
    2. Barsali, Stefano & Ciambellotti, Alessio & Giglioli, Romano & Paganucci, Fabrizio & Pasini, Gianluca, 2018. "Hybrid power plant for energy storage and peak shaving by liquefied oxygen and natural gas," Applied Energy, Elsevier, vol. 228(C), pages 33-41.
    3. She, Xiaohui & Peng, Xiaodong & Nie, Binjian & Leng, Guanghui & Zhang, Xiaosong & Weng, Likui & Tong, Lige & Zheng, Lifang & Wang, Li & Ding, Yulong, 2017. "Enhancement of round trip efficiency of liquid air energy storage through effective utilization of heat of compression," Applied Energy, Elsevier, vol. 206(C), pages 1632-1642.
    4. Tafone, Alessio & Romagnoli, Alessandro & Borri, Emiliano & Comodi, Gabriele, 2019. "New parametric performance maps for a novel sizing and selection methodology of a Liquid Air Energy Storage system," Applied Energy, Elsevier, vol. 250(C), pages 1641-1656.

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