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Abstract
Operating and economic conditions of cooling water control for marine steam turbine condensers The article presents the operational and economic analysis of controlling the cooling water flow in marine steam turbine power plants. The analysis bases on selected designs of the main condenser cooling water pumps and makes use of the results of investigations performed in inland power plants. Special attention was focused on marine aspects of the operation of those systems.
Highlights
One of basic components of the steam turbine power plant is the condenser in which the steam condenses after passing its heat to the cooling water
The main reason for applying control systems in inland turbine power plants is an attempt to save the water, the consumption of which is extremely high during steam power plant operation [1, 5, 8, 12]
The economic analysis of cooling pump operation in marine power plants is fully justified, especially in case of tankers, which sail with the cargo in forward trip and return only loaded with the ballast
Summary
One of basic components of the steam turbine power plant is the condenser in which the steam condenses after passing its heat to the cooling water. Ships with unlimited sailing region, which are, as a rule, designed for least favourable conditions of power plant operation in the tropical zone, sail in more moderate zones, which needs adapting the operating conditions of their cooling systems to current ambient temperatures Another argument justifying the interest in analysing the above problem is the appearance of opinions suggesting the need for reconstruction of the global fleet of liquefied fuel tankers based on new standards [17] due to the exploitation of new deep-sea oil development areas. The analysis takes into account, on the one hand, the reduction of the power needed for driving the cooling water pumps at their reduced capacity, and, on the other hand, power losses of the main turbines resulting from the lower-quality vacuum in the condenser due to smaller rate of the cooling water Operating aspects of such solutions which are specific for marine applications are discussed
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