Geothermal and heat pump heating system with peak-shaving boiler

Performs a comprehensive analysis of the geothermal and heat pump heating system with peak-shaving boiler with geothermal well located in different positions, where geothermal water temperature is between 45 ℃ and 95 ℃ and geothermal water discharging rate is between 70 t/h and 150 t/h. The results show that the temperature difference between the optimal system design backwater and indoor floor heating design backwater is about 1 ℃. The temperature difference between the optimal discharging water of primary side of the first heat exchanger and the optimal system design backwater is from 1.6 ℃ to 1.7 ℃. The optimal peak-shaving load takes 37% to 40% of the total load. It is not economic to only emphasize the lowest geothermal backwater temperature and the maximum geothermal utilization rate, without consideration of geothermal water temperature and geothermal water discharging rate.