What is the role of the condensate pump in a surface condenser?

The role of the condensate pump in a surface condenser is crucial as it facilitates the removal and transfer of the condensed steam (liquid condensate) back to the hot well or condensate storage tank. After steam passes through the condenser, it loses heat and condenses into water. This condensed water must be efficiently pumped away to maintain optimal operation and prevent flooding of the condenser.

By transferring the condensate to the hot well, the condensate pump ensures that the water can be reused as feedwater for the boiler, thus improving the overall efficiency of the system. This continuous cycle of condensation, pumping, and reheating is essential to the functioning of thermal plants and ensures that energy is conserved by recycling water within the system.

The other options, such as injecting feedwater, draining steam, or cooling the system, do not describe the primary function of the condensate pump in this context. Each of those actions relates to different components or processes associated with boiler operation and steam systems. The specific design and operation of each part contribute to overall system efficiency, but the condensate pump's primary duty revolves around the transportation of condensate to the hot well.