Fisair systems reduce steam turbine natural cold downtime by 40%, with a significant saving in staff time and maintenance.
They provide high starting flexibility, so the plant is operational again in a short space of time.
The Super Dryer has 2 main functions:
As well as using it for the turbine, its portability means it can be used for preservation the elements that appear in the following graphic.
Following the boom in renewable energy, energy prices began to rise considerably and many plants could not compete due to the high stop and start times. In response to this problem with renewable energy, we began developing high pressure equipment that no other supplier had developed.
These devices reduced the number of dryers to connect as well as downtime. We worked with power plants and their technicians to solve a problem for turbine manufacturers at their request. There was no such technology on the market, so FISAIR became a pioneer in developing it.
We have standardised the connection to your turbine for simplicity.
The equipment was designed within a rack framework, for easy connection to the turbine and easy movement.
Equipment with these features is usually specified in new plants, due to their great advantages.
This product can be operated with any steam turbine.
Modifications can be made according to the project to comply with final customer specifications.
All details are analysed in each of the projects.
The task of the forced cooling fan rack is to supply cooling air to the steam turbine to shorten the cooling time after shutdown.
The cooling air is fed to the steam turbine through connections located in the condenser (vacuum breaker) and the HP housing balance flange (hole) – or the cold reheat section upstream of the retention valve assisted by the HP turbine exhaust. The pressurised air (cooling air) is blown through flexible hoses in these two openings with mobile external equipment subject to this specification.
The cooling air flows back through the LP, IP and HP turbine to the common vent connection in the cold reheat steam system and released to the atmosphere.
In addition, the equipment must be able to function as a mobile dehydrating vent with an absorption component (air dryer) and accessories (e.g. manifold, slide valve and spiral hoses with hose connections) as preservation equipment.
The dehumidification and reconditioning processes in the absorption component must be continuous. The wet reconditioning air must be led to the atmosphere in such a way that it cannot be sucked back into the drying or reconditioning air inlet.
Forced cooling is only active until the average temperature of the HP and IP rotor reaches 150°C, the operation of the Blower & Super Dryer rack is independent of the turbine control system and can be turned on and off from the local plate in the rack.
Software modifications will be implemented in the control system in the next C-inspection or in a planned plant shutdown. The same applies at a distance: Hardware modification away from the reheat connection tubing.
After restoring the power plant (excluding GT), the Super Dryer and blower can be used to preserve the ST, WSC and HRSG to be ready from the start. This system can also be installed for preservation reasons only.
Fisair is committed to a high quality product, which also includes the following services:
Equipment with forced cooling has been supplied successfully in several places around the world, complying with the rigorous standards of turbine manufacturers in each.
USA, Birdsboro
UK, Carrington
ARGENTINA, El Bracho
ISRAEL, Tzfat/Ashalim
GERMANY, Manheim
FINLAND, Vantaa
MALAYSIA, Tanjung
Some outstanding references:
