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TP48200A-HT19C4-1 and TBC300A-TCA2 Telecom
Power
User Manual
Internal circulation: Hot air in the equipment compartment is drawn by the internal circulation
fan above the heat exchanger into the heat exchanger, passes through the heat exchanging
core from top to bottom, then releases heat to change to cold air, and finally returns to the
equipment compartment through the internal air exhaust vent under the heat exchanger.
External circulation: Natural air is drawn by the external circulation fan under the heat
exchanger into the heat exchanger from the outside of the cabinet, passes through the heat
exchanging core from bottom to top, then absorbs heat to change to hot air, and finally flows
out of the cabinet through the external air exhaust vent of the heat exchanger.
Figure 3-11 shows the heat exchange working principles.
Figure 3-11 Heat exchange working principles
3.6.2 TEC
The TEC unit consists of the TEC module (TEC04C) and TCUA control box. It controls
temperatures for the battery compartment.
TEC Module (TEC04C)
Figure 3-12 shows a TEC04C.
Issue 03 (2019-11-15)
Copyright © Huawei Technologies Co., Ltd.
3 Components
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