Download PDF ENGINEERING THERMODYNAMICS by R. K. Rajput

Sinopsis

Coal and Ash Circuit. Coal arrives at the storage yard and after necessary handling, passes on to the furnaces through the fuel feeding device. Ash resulting from combustion of coal collects at the back of the boiler and is removed to the ash storage yard through ash handling equipment.

Air and Gas Circuit. Air is taken in from atmosphere through the action of a forced or induced draught fan and passes on to the furnace through the air preheater, where it has been heated by the heat of flue gases which pass to the chimney via the preheater. The flue gases after passing around boiler tubes and superheater tubes in the furnace pass through a dust catching device or precipitator, then through the economiser, and finally through the air preheater beforebeing exhausted to the atmosphere.

Feed Water and Steam Flow Circuit. In the water and steam circuit condensate leaving the condenser is first heated in a closed feed water heater through extracted steam from the lowest pressure extraction point of the turbine. It then passes through the deaerator and a few more water heaters before going into the boiler through economiser.

In the boiler drum and tubes, water circulates due to the difference between the density of water in the lower temperature and the higher temperature sections of the boiler. Wet steam from the drum is further heated up in the superheater for being supplied to the primemover. After expanding in high pressure turbine steam is taken to the reheat boiler and brought to its original dryness or superheat before being passed on to the low pressure turbine. From there it is exhausted through the condenser into the hot well. The condensate is heated in the feed heaters using the steam trapped (blow steam) from different points of turbine.

Content

1. INTRODUCTION—OUTLINE OF SOME DESCRIPTIVE SYSTEMS
2. BASIC CONCEPTS OF THERMODYNAMICS
3. PROPERTIES OF PURE SUBSTANCES
4. FIRST LAW OF THERMODYNAMICS
5. SECOND LAW OF THERMODYNAMICS AND ENTROPY
6. AVAILABILITY AND IRREVERSIBILITY
7. THERMODYNAMIC RELATIONS
8. IDEAL AND REAL GASES
9. GASES AND VAPOUR MIXTURES
10. PSYCHROMETRICS
11. CHEMICAL THERMODYNAMICS
12. VAPOUR POWER CYCLES
13. GAS POWER CYCLES
14. REFRIGERATION CYCLES
15. HEAT TRANSFER
16. COMPRESSIBLE FLOW

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