How Does a Heat Recovery Steam Generator (HRSG) Work? 3D Animation

A step by step 3D animated explanation of how a Heat Recovery Steam Generator (HRSG) works inside a combined cycle power plant (CCGT), from cold feedwater inlet all the way to electricity generation on the National Grid.

A gas turbine alone wastes up to 65% of its energy as hot exhaust gas. In this video we break down exactly how an HRSG captures that wasted heat and converts it into electricity, pushing combined cycle power plant efficiency from around 35% up to over 60%. We cover every stage of the process with real operating temperatures and pressures throughout.
Starting at the Economiser where cold feedwater enters at around 35°C and is preheated using the last remaining heat from the exhaust gases. The water then enters the Steam Drum and circulates through the Evaporator tubes where the hot exhaust gases, still at 300 to 400°C cause the water to boil into saturated steam. That saturated steam then travels into the Superheater, the hottest section of the HRSG where exhaust gases reach 450 to 550°C, superheating the steam to temperatures of up to 550°C at pressures of 100 to 160 bar. Finally that superheated steam drives the Steam Turbine, generating electricity before the cooled steam is condensed back into feedwater and recycled through the system in a fully closed loop.
Whether you are a mechanical or chemical engineering student, a power plant professional, or simply curious about how a thermal power station generates electricity from waste heat , this video covers everything you need to know.

Timestamps

0:00 — Introduction & System Overview
0:58 — Feedwater Inlet & Economiser
1:33 — Steam Drum & Evaporator
2:48 — Superheater, Superheated Steam
3:47 — Steam Turbine, Generator & Condenser
4:35 — Full Cycle Summary
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Видео How Does a Heat Recovery Steam Generator (HRSG) Work? 3D Animation канала makingengineeringsimple