Design of a hybrid ground-source heat pump system for a residential district in Beijing

The project adopts the hybrid GSHP system composed of the ground heat exchangers and auxiliary heat/cold source, employing water-loop heat pump system with distributed heat pump units and using the ground heat exchangers as the primary heating and cooling source and lake water as auxiliary cooling source in summer while gas boilers as auxiliary heating source in winter. The system supplies dedicated domestic hot water heat pump system, making full use of the available ground areas around the buildings on one hand, satisfying peak loads for cooling or heating on the other hand, thus decreasing system initial cost and improving system economics, performance and reliability.