Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (5): 1494-1502.doi: 10.19799/j.cnki.2095-4239.2021.0233

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Matching performance between the trigeneration of an adiabatic compressed air energy storage system and load

Qi XIA1(), Yang HE1, Yujie XU2, Haisheng CHEN2, Jianqiang DENG1()   

  1. 1.School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
    2.Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2021-05-28 Revised:2021-07-13 Online:2021-09-05 Published:2021-09-08

Abstract:

Adjusting trigeneration of adiabatic compressed air energy storage system (A-CAES) to match the variable loads of the supply objects in different seasons can greatly promote the practical application of A-CAES system. In this paper, the simulation model of A-CAES system was developed. The charging and discharging period of system were simulated to investigate the characteristics of system trigeneration. The cooling, heating and electric load of a typical residential area in different seasons was analyzed. Then the load of residential area and trigeneration of system was matched to find the matching performance between them. Finally, through economic analysis the energy cost of a traditional residential area and a new residential area whose energy is supplied by A-CASE system was compared. The simulation results show that the cooling and heating load of households varies greatly in different seasons, but the difference of electric load is small. The mass flow rate of chilled water has little effect on the cooling, heating and electric output, so the minimum value is suggested to improve the quality of chilled water. The mass flow rate of preheating hot water in the discharging period can greatly change cooling, heating and electric output of system. By matching system trigeneration characteristics and residential load, optimum heating hot water flow for summer, spring and autumn, and winter was selected as 3.9 kg/s, 3.9 kg/s and 1.6 kg/s. It is advisable to use higher hot water flow rate to maximize electricity production in summer. The economic analysis found that the annual energy supply cost of the residential area whose energy is supplied by A-CAES system is 23.1% lower than that of the conventional residential area. The annual energy supply cost of residential area decreases 1.56 million CNY. Combined with the equipment cost, the static investment payback period of the system was calculated as 15.6 years.

Key words: adiabatic compressed air energy storage system, variable load, trigeneration

CLC Number: