Steam storage costs in guinea

What is steam accumulation?

Steam accumulation can provide large-scale indirect storage of electrical power by accumulating excess steam produced by the steam generator for later release to drive the turbo-generator. Its purpose can be to maintain power output when demand exceeds supply or to balance a variable load.

What is steam used for?

This is usually in the form of steam or hot water in a heat recovery heat exchanger or as a source of direct energy for process fluid heaters, or for pre-heating of combustion air for fired boilers. The steam produced may also be used to drive a steam turbine in a combined-cycle plant.

Could a lower operating cost increase steam accumulation?

Fewer boilers on-line operated under steady load conditions would lead to less ‘wear and tear’ and as a result lower maintenance costs. The potential for labour and material cost savings may be easily examined, but safe to say a reduction in operating costs would contribute significantly to enhancing the case for steam accumulation.

What are the disadvantages of steam accumulation?

A major disadvantage of steam accumulation is the relatively low temperature of the outlet saturated steam (i.e., a maximum temperature of 374 °C) when compared to the operating temperatures of DSG plants, which could reach up to 550 °C .

What is the steam quality at the main turbine outlet?

The steam quality at the main turbine outlet is 0.88, still above the minimum boundary for avoiding erosion and corrosion of the steam turbine blades . Fig. 7. Temperature-specific entropy ( T-s) diagram showing the thermodynamic processes of Khi Solar One steam Rankine cycle at full rated power.

How does a steam accumulator charge?

Charging of an accumulator takes place when ‘surplus’ or ‘excess’ steam from the boiler is condensed in the water space of the accumulator. This is achieved by directly injecting the steam into the water by means of special charging nozzles.