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. 2022 Aug 4:2022:8906838.
doi: 10.1155/2022/8906838. eCollection 2022.

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

Caihong Yin  1 , Ronghua Wu  2   3 , Hao Zhan  3 , Hao Yu  2 , Changqing Liu  3
Affiliations

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

Caihong Yin et al. Comput Intell Neurosci. .

Abstract

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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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Operating principle diagram of phase change heat storage air source heat pump system. (1) Compressor. (2) Condenser. (3) Throttle valve. (4) Evaporator. (5) Four-way valve. (6) Fan. (7) End heat exchanger. (8) Phase change heat storage device. (9) End pump. (10) Intermediate pump. (11) Solenoid valve 1. (12) Solenoid valve 2. (13) Solenoid valve 3.
Figure 2
Figure 2
Air enthalpy and humidity diagram in the evaporator.
Figure 3
Figure 3
Compressor operating range.
Figure 4
Figure 4
Distribution of building heat load with ambient temperature.
Figure 5
Figure 5
The change of HSPF of two heating methods.
Figure 6
Figure 6
Comparison of defrosting energy consumption between two systems.
Figure 7
Figure 7
HSPF and primary energy consumption at different phase transition temperature.
Figure 8
Figure 8
Cumulative heat storage and defrosting energy consumption at different phase transition point temperatures.
See this image and copyright information in PMC

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