Where are high pressure heaters typically positioned in a power engineering system?

High pressure heaters are strategically located downstream of the boiler feedwater pumps within a power engineering system. This positioning allows them to effectively preheat the water before it enters the boiler. By raising the temperature of the feedwater, high pressure heaters help to improve the thermal efficiency of the boiler and reduce fuel consumption. Additionally, preheating the feedwater reduces the risk of thermal shock to the boiler components and can enhance the overall operational performance of the power plant. This location ensures that the feedwater is optimally prepared for the high pressures and temperatures existing in the boiler environment.