| As a new energy storage adjusting load technology, the solution concentration difference energy storage is a kind of technology by which energy is indirectly transformed and stored. It use the characteristics of the working fluid chemical potential changing caused by mass variation in a working fluid storage tank to complete the whole processes of energy transformation and storage during the energy charging or discharging. Ground-coupled heat pump using soil thermal as heat solution and pool, which possessing excellent characteristics of temperature and energy storage. It can greatly improve the cooling and heating efficiency. Combined with the advantages of energy storage adjusting load technology and Ground-coupled heat pump, present a new integrated system, which not only can balance electrical load and slow electrical press, and also can reduce running charge and protect environment as large as possible.The integrated soil thermal and energy storage heat pump system using NH3-H2O as working fluid is studied in this paper. First the integrated system working principle and flow is described and then the dynamics models of the system working process are established. Based on these dynamic models, the operation characteristics of the integrated system according to a specific example are simulated by numerical simulation. As a small independent tenement, whose energy storage is about 200kWh, mostly heating in winter, subordinately cooling in summer. According to the analysis of simulation results, we primarily know a relation of dynamical and mutual coupling between soil thermal and energy storage heat pump, finding influence factors for the performance of the ground heat exchanger, pointing the approach to improving the running performance of the integrated system. Those conclusions of the discussion can provide some theoretical references for deep research work as to system design, control, economic estimate, equipment selection and so on. |
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