Performance analysis of CBC-TEG power generation scheme with sintered lunar regolith heat storage for full-day continuous power supply to moonbase

The continuous supply of electrical energy full-day has now become the biggest problem in establishing a moonbase.The closed Brayton cycle (CBC) coupled with thermoelectric generator (TEG) can effectively is proposed in this paper to solve this issue.The functions of the two power generation systems are different: CBC is for high power generation and TEG provides energy at nighttime or when solar energy is insufficient.After the study of full-day performance, it is concluded that CBC thermal 4 efficiency gets 31.4 % as the time advanced to lunar noon.Using TEG with CBC thermal efficiency below 0, the maximum energy conversion efficiency and power output of TEG are 0.67 %, 1.8 kW, respectively.In the lunar nighttime, CBC working hours are directly affected by the flow rate.With limited mass TSUs, higher flow rate represents higher thermal energy consumption, and the power generation capacity of CBCs gradually diminishes.In addition, increasing the number of TEG stages has a directly effect on weight.The difference in weight between 1-stage and 4-stage is 4 times.CBC-TEG can solve the problem of continuous energy supply full-day, but parameters such as the operating flow rate and TEG stage number need to be selected according to practice needs.