Water Steam Cycle

 

THE WATER-STEAM CYCLE IN CCP POWER PLANTS

The thermal energy is taken up in the solar field and transports the heat transfer fluid must now be transformed into another type of energy that allows easy conversion into electricity. The electricity production with a steam turbine and an electric generator coupled to the shaft is a mature technology and widely known. It seems a simple and convenient solution of transforming HTF’s heat into a steam flow at a specific pressure. Thus, a new heat transfer fluid is required: water.

This article is an extract from chapter 13 of the general technical course manual on SOLAR THERMAL POWER PLANTS that can be done ONLINE. For more information call 91 126 37 66 or by sending an email to This email address is being protected from spambots. You need JavaScript enabled to view it.

RENOVETEC also has a specific course on Water Steam Cycle, which can be done both face-to-face and in ONLINE.

 

Thus, the heat captured and transported by the HTF system heats water to generate superheated steam. That steam at high pressure and medium temperature (380 º C) is expanded in a steam turbine that will produce rotary mechanical power, easily transformed into electrical energy with the help of a synchronous generator.

13.2 Water- Steam Cycle diagram

The general scheme of the cycle that the liquid water follows until turning into steam and re-condensing (so-called water-steam cycle) is shown in Figure 13.2 (previous page).

In the scheme can be seen how liquid water begins its cycle in the gas-condensate well, a tank usually located under the condenser that contains all the steam to be condensed in this equipment, and that is the first water store for all the circuit. From there the water has to go through all the systems that the water-steam cycle consists, which are:

·         Condenser

·         Condensate pumps

·         Low-pressure preheaters

·         Feedwater tank (or degassing)

·         High pressure feedwater pumps

·         High pressure preheaters

·         High pressure steam generation train 

·         High pressure bypass valve

CHAPTER 13 FULL CONTENT

WATER STEAM CYCLE

13.1 WATER-STEAM CYCLE FUNCTION

13.2 WATER- STEAM CYCLE DIAGRAM

13.3 CONDENSER

13.4 THE CONDENSATE PUMPS

13.5 LOW-PRESSURE PREHEATERS

13.6 FEEDWATER TANK

13.7 FEEDWATER PUMPS

13.8 HIGH-PRESSURE PREHEATERS

13.9 STEAM GENERATION TRAIN

13.9.1 Rankine Cycle

13.9.2 Equipment that make up the steam generation train

13.9.3 Justification of the use of two pressure levels

13.9.4 Steam generation train configuration

13.10 BY-PASS VALVE FOR HIGH PRESSURE

13.11 HIGH PRESSURE STEAM TURBINE

13.12 SETAM SEPARATOR

13.13 REHEATER

13.14 LOW PRESSURE BYPASS VALVES

13.15 LOW PRESSURE TURBINE

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