Simulation on energy performance of air-conditioning system assisted with thermosyphon used in telecommunication base station

Spaces with high heat generation such as telecommunication base stations (TBS) increase sharply recently. Huge energy is consumed for air-conditioning because of large indoor heat rejection and year round cooling in these spaces. Thermosyphon heat exchanger is an appropriate cooling technique for TBS, which can make full use of natural outdoor cooling resources without much electrisity consumption. To analyze the energy performance of air-conditioning system assisted with thermosyphon (ACT) used in TBS, a detailed model has been developed, which consists of cooling load model of TBS, ACT performance model and operation model. It is noteworthy that in the ACT performance model, a distributed parameter model for thermosyphon heat exchanger has been established and verified by experiments. Then, the energy-saving effects of the ACTs located in different climates are investigated using the model. The results show that the energy saving effect is significant, and the saving rate in cold regions is larger than that in warm regions.