| Applications of photovoltaic and ground resource heat pump are two important research fields of renewable energy using. One of the important research problems is to make the photovoltaic-solar and the ground resource heat pump air-condition to be a unite system and make use of the system in buildings energy saving. In this paper, the photovoltaic-solar assisted ground resource heat pump air-condition system is researched. And a united system is designed. Main research works are:1. The united mode of solar energy and GRHP is analyzed and the feasibility of making use of the photovoltaic-solar assisted ground resource heat pump air-condition in buildings energy saving is proved. A PV-Solar assist GRHP air-condition control system is also brought forward.2. According to the power consumption of the load, a solar energy photovoltaic power generation system is designed. The algorithms of the system capacity and the battery capacity based on the load are given. Inverter for the novel stand-alone photovoltaic power system is also designed. The inverter uses the"push-pull circuit + high frequency transformer + single-phase full-bridge inverter"design proposal, which helps to reduce system volume and increase system efficiency.3. Frequency-conversion control is applied in the deep well pump and the fan. The control schemes are designed simulated.4. By adopting improved computer numeral PID control algorithm, the system can accurate control the temperature and the flow rate of the air-condition system. In this paper, on conversion technique is set out. The control precision is further improved.According to the simulation, the automatic control system based on use of photovoltaic-solar and the ground resource heat pump can regulate the air temperature and the flow rate. It could be concluded that: this system can work stand-alone, and the control system has a smaller overshoot, better Robust. The power generated by the photovoltaic system can meet the consumption of the GRHP air-condition. |
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