Flexible Energy-Saving Control Strategy of a Solar-ASHP Integrated Heating System Based on Time-Sharing Heat Demand

Xiuying YAN; Pengfei YU; Dengjia WANG

doi:10.16513/j.2096-2185.DE.2308101

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Distributed Energy ›› 2023, Vol. 8 ›› Issue (1) : 1-10. DOI: 10.16513/j.2096-2185.DE.2308101

Basic Research

Flexible Energy-Saving Control Strategy of a Solar-ASHP Integrated Heating System Based on Time-Sharing Heat Demand

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Abstract

Combining the different indoor heat demands of time-sharing, designing a reasonable control strategy will bring huge energy saving potential to the solar heating system (SHS) with auxiliary heat pump. Based on the existing research on the human body's differential heat demand in northwest China, this study proposes a flexible energy-saving control strategy of a combined solar and air source heat pump (ASHP) heating system based on time-sharing heat demand. Considering the indoor heat demand in different time periods, the corresponding room temperature control range is set and the output sequence of the heat source is optimized. As a result, the control system becomes more flexible. The simulation model of the system is established by TRNSYS, and the operation of the system under different control strategies is studied. A case study of a residential building in three areas with different solar energy resource levels is considered. Compared with the commonly used "thermostatic" control strategy, the proposed control strategy allows the full utilization of the solar energy and a reduction in the total energy consumption by up to 24% through reducing the working time of the ASHP. The results also show that the proposed control strategy is more effective in areas with high radiation intensity.

Key words

solar heating system / flexible control strategy / air source heat pump / heat demands of time-sharing / energy saving

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Xiuying YAN , Pengfei YU , Dengjia WANG. Flexible Energy-Saving Control Strategy of a Solar-ASHP Integrated Heating System Based on Time-Sharing Heat Demand[J]. Distributed Energy Resources. 2023, 8(1): 1-10 https://doi.org/10.16513/j.2096-2185.DE.2308101

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