The present disclosure relates to a boiler water supply preheater system which preheats water (boiler water supply) supplied to a boiler by a predetermined preheating means, wherein the preheating means is a Rankine cycle (thermal cycle) which moves heat of a waste heat source in the boiler to the boiler water supply to perform preheating and drives a generator to generate electric power using a heat medium.

The invention relates generally to methods and apparatus for start-up and control of liquid salt energy storage combined cycle systems.

A heat recovery apparatus recovers steam drain including at least one of steam used in a different device and drain where the steam used in the different device is condensed so as to recover heat contained in the steam drain. The heat recovery apparatus includes a pump, which circulates water accumulated in a tank through circulation pipes, an ejector, which is interposed in the circulation pipes and suctions the steam drain and mixes the steam drain with the circulating water so as to recover the steam drain, and a ball tap and a temperature controller, which perform temperature control of the water in the tank by replenishing the tank with tap water after a part of the water in the tank is discharged in the case where the water in the tank has reached a preliminarily set first temperature.

A heat recovery apparatus recovers steam drain including at least one of steam used in a different device and drain where the steam used in the different device is condensed so as to recover heat contained in the steam drain. The heat recovery apparatus includes a pump, which circulates water accumulated in a tank through circulation pipes, an ejector, which is interposed in the circulation pipes and suctions the steam drain and mixes the steam drain with the circulating water so as to recover the steam drain, and a ball tap and a temperature controller, which perform temperature control of the water in the tank by replenishing the tank with tap water after a part of the water in the tank is discharged in the case where the water in the tank has reached a preliminarily set first temperature.

This low-pressure condenser is provided with: a pressure bulkhead which partitions the inside of the container into an upper space and a lower space; a heat transfer tube which is arranged in the upper space; and a reheater which is arranged in the lower space and which, by means of high-temperature steam flowing from the outside into the lower space, heats water which condenses in the upper space and flows into the lower space. The reheater includes multiple partition members, a receiving plate which receives water flowing downward via the partition members, and a dam which is connected to the outer peripheral edge of the receiving plate. The lower ends of the multiple partition members are below the upper end of the dam.

This low-pressure condenser is provided with: a pressure bulkhead which partitions the inside of the container into an upper space and a lower space; a heat transfer tube which is arranged in the upper space; and a reheater which is arranged in the lower space and which, by means of high-temperature steam flowing from the outside into the lower space, heats water which condenses in the upper space and flows into the lower space. The reheater includes multiple partition members, a receiving plate which receives water flowing downward via the partition members, and a dam which is connected to the outer peripheral edge of the receiving plate. The lower ends of the multiple partition members are below the upper end of the dam.

Disclosed herein is a supercritical CO.sub.2 generation system using plural heat sources, including: a pump configured to circulate a working fluid; plural heat exchangers configured to heat the working fluid using an external heat source; plural turbines configured to be driven by the working fluid heated by passing through the heat exchanger; and plural recuperators configured to exchange heat between the working fluid passing through the turbine and the working fluid passing through the pump to cool the working fluid passing through the turbine and heat the working fluid passing through the pump, in which the heat exchanger may include plural constrained heat exchangers having an emission regulation condition of an outlet end and plural heat exchangers without the emission regulation condition.

A preheating system for preheating fluid medium to be fed into the HRSG is disclosed. The system includes a feed line and a recirculation line. The feed line is adapted to feed the fluid medium to a Low Pressure Economizer (LPE) of the HRSG. The feed line is adapted to be adjoined to an inlet of the LPE, and an outlet of the LPE enables therefrom the flow of the fluid medium in further portion of the HRSG. The recirculation line is adapted to be connected between the outlet and the inlet of the LPE, in parallel to LPE to recirculate the fluid medium to the LPE. A particular method of preheating using such a system is equally disclosed.

The invention relates generally to methods and apparatus for start-up and control of liquid salt energy storage combined cycle systems.