A hybrid H2O/IL absorption and CO2 compression air-source heat pump for ultra-low ambient temperatures

Wu, Wei; Zhai, Chong; Huang, Si-Min; Sui, Yunren; Sui, Zengguang; Ding, Zhixiong

doi:10.1016/j.energy.2021.122180

Cited by 18 publications

(1 citation statement)

References 62 publications

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“…Lx et al [ 4 ] experimentally verified the operational stability of the cascade air source heat pump system when it was applied in cold regions, and the results showed that the system operated stably in the heating season, and the efficiency was much higher than that of the gas boiler. Wu et al [ 5 ] proposed and theoretically validated a new H 2 O/ionic liquid absorption and CO 2 compressed air source heat pump system for ultra-low ambient temperature, which operated well at −30°C ambient temperature, and the primary energy efficiency (PEE) was higher than 1.256. Zhang et al [ 6 ] simulated the heating performance of the cascade air source heat pump system using R134a/CO 2 in severe cold regions.…”

Section: Introductionmentioning

confidence: 99%

Computational Intelligence Powered Performance Analysis on Phase Change Heat Storage Air Source Heat Pump System

Yin¹,

Zhan

et al. 2022

Computational Intelligence and Neuroscience

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Aiming at the performance deterioration of air source heat pump at low temperature in cold area, an air source heat pump system with sodium chloride aqueous solution as low temperature phase change heat storage material was proposed to increase the air inlet temperature of the unit under low temperature conditions and improve the low temperature performance of the heat pump unit. The system form, unit energy consumption model, and economic model were given, and the operating economy of the traditional electric auxiliary heat air source heat pump system and the phase change heat storage air source heat pump system were compared through computational intelligence powered methods. On this basis, the operation economy of the heat pump system using different concentrations of sodium chloride solution as the heat storage material was simulated and optimized, and the operation efficiency and energy-saving performance of the system were analyzed by taking an actual residential building in a cold area as an example. The simulation results showed that the Heating Seasonal Performance Factor (HSPF) of the heat pump system using 8.5% sodium chloride aqueous solution as the heat storage material is 2.24, and the HSPF of the traditional electric auxiliary heat pump system is 1.83. Compared with the traditional electric auxiliary heat pump system, the phase change heat storage heat pump system saves heating energy consumption by 19.6% and defrosting energy consumption by 38.8%. The heat pump system using 10% sodium chloride aqueous solution as the heat storage material has the best operating economy, and the system HSPF is 2.33, which saves heating energy consumption by 23.2% and defrosting energy consumption by 34% compared with the traditional heat pump system. The operation condition of phase change heat storage air source heat pump system is stable, and the system performance is significantly improved.

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Section: Introductionmentioning

confidence: 99%