Abstract
After steam expands to a certain intermediate pressure in steam turbine, it is led out of steam turbine and sent to reheater of boiler. The steam is heated to the initial temperature by constant pressure in the reheater. After that, the steam is introduced into the steam turbine and continues to expand to the exhaust steam pressure. The steam after work enters the condenser for cooling and heat release. Such a steam power cycle is a reheat cycle. The purpose of reheat cycle is to solve the contradiction that the dryness of exhaust steam decreases after the application of high parameters in steam power cycle. Through theoretical study and qualitative analysis, we know that the correct selection of reheat pressure can not only improve the steam turbine exhaust dryness, but also improve the thermal efficiency of the cycle. Reheat pressure is very important to the economy of reheat cycle and the safe operation of equipment. The correct choice of reheat pressure will affect the economy of the whole cycle.
Highlights
The steam is heated to the initial temperature by constant pressure in the reheater
The steam is introduced into the steam turbine and continues to expand to the exhaust steam pressure
After using the intermediate reheat, the exhaust dryness of the steam turbine can be improved, and the steam dryness in the low pressure cylinder can be kept within a normal working range, so as to enhance the Through theoretical study and qualitative analysis, we know that the correct selection of reheat pressure can improve the steam turbine exhaust dryness, and improve the thermal efficiency of the cycle
Summary
The steam enters the high pressure cylinder of the steam turbine and expands to do work to a certain intermediate pressure. It is led out of the steam turbine and sent to reheater of the boiler. After using the intermediate reheat, the exhaust dryness of the steam turbine can be improved, and the steam dryness in the low pressure cylinder can be kept within a normal working range, so as to enhance the Through theoretical study and qualitative analysis, we know that the correct selection of reheat pressure can improve the steam turbine exhaust dryness, and improve the thermal efficiency of the cycle. For the teaching of our vocational colleges, this kind of comparative calculation can consolidate the theoretical knowledge, strengthen the qualitative analysis, and enhance the perceptual knowledge
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