What is the minimum temperature and pressure requirement for power boilers designed to produce hot water?

The minimum temperature and pressure requirement for power boilers designed to produce hot water is set to ensure safe and efficient operation within industrial standards. The selected choice specifies a minimum temperature of 120 degrees Celsius and a pressure of 1.1 MPa, which aligns with the published codes and regulations governing boiler safety and performance.

At 120 degrees Celsius, water can reach a state where sufficient energy is generated for heating systems, while maintaining a pressure of 1.1 MPa ensures the water remains in a liquid state and prevents it from boiling. This is critical because, at lower pressures or temperatures, there is a risk of the water transitioning to steam, which can be dangerous in power boilers not designed for steam service.

The other options suggest higher temperatures and pressures that are generally beyond the minimum necessary for standard hot water production in boilers, indicating setups intended for more demanding applications or steam generation. Therefore, the combination of 120 degrees Celsius and 1.1 MPa represents an industry-compliant baseline requirement for typical hot water boiler operation.