Abstract:A solar-driven thermoelectric ventilator was designed, by adjusting the input voltage of the thermoelectric ventilator to adapt the requirement of fresh air load varied with times.The capacity matching relationships among PV modules, thermoelectric ventilator and battery were analyzed, and the corresponding numerical model was also developed.The working condition of thermoelectric ventilator for an office with a fresh air of 90 m3/h at 8:00 to 18:00 in Beijing from July 21st to August 21st and from January 1st to 31st was simulated.The simulation results show that during the simulation period, the total output of PV modules was 9424 kW, and the total electricity consumption of thermoelectric ventilator was 6435 kW, the maximum power consumption of continuous rainy weather was 119 kW, and the system’s average cooling COP can reach 250 from July 21st to August 21st.The total output of PV modules was 5029 kW, and the total electricity consumption of thermoelectric ventilator was 4054 kW, the maximum power consumption of continuous rainy weather was 151 kW, and the system average heating COP can reach 302 from January 1st to 31st.