TAILIEUCHUNG - Handbook of Mechanical Engineering Calculations P2

STEAM CONDENSING SYSTEMS AND AUXILIARIES Design of Condenser Circulating-Water Systems for Power Plants Designing Cathodic-Protection Systems for Power-Plant Condensers Steam-Condenser Performance Analysis | Source HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS __SECTION 2__ STEAM CONDENSING SYSTEMS AND AUXILIARIES Design of Condenser Circulating-Water Systems for Power Plants Designing Cathodic-Protection Systems for Power-Plant Condensers Steam-Condenser Performance Analysis Steam-Condenser Air Leakage Steam-Condenser Selection Air-Ejector Analysis and Selection Surface-Condenser Circulating-Water Pressure Loss Surface-Condenser Weight Analysis Weight of Air in Steam-Plant Surface Condenser Barometric-Condenser Analysis and Selection Cooling-Pond Size for a Known Heat Load DESIGN OF CONDENSER CIRCULATING-WATER SYSTEMS FOR POWER PLANTS Design a condenser circulating-water system for a turbine-generator steam station located on a river bank. Show how to choose a suitable piping system and cooling arrangement. Determine the number of circulating-water pumps and their capacities to use. Plot an operating-point diagram for the various load conditions in the plant. Choose a suitable intake screen arrangement for the installations. Calculation Procedure 1. Choose the type of circulating-water system to use There are two basic types of circulating-water systems used in steam power plants today the once-through systems Fig. 1a and the recirculating-water system Fig. 1b. Each has advantages and disadvantages. In the once-through system the condenser circulating water is drawn from a nearby river or sea pumped by circulating-water pumps at the intake structure through a pipeline to the condenser. Exiting the condenser the water returns to the river or sea. Advantages of a once-through system include a simple piping arrangement b lower cost where the piping runs are short c simplicity of operation the cooling water enters then leaves the system. Disadvantages of once-through systems include a possibility of thermal pollution . temperature increase of the river or sea into which the warm cooling water is .

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