【Mechanical Equipment Technology Exchange Edition】Mechanical Equipment 【Daily Question】201200107
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Question: How to calculate the internal power of a stage? There are no answers provided for this series of posts; fellow netizens are free to share their own opinions – just reply with what you understand. Replies earn rewards ranging from 5 to 15 points; all forum members are welcome to participate actively and support the development of the forum! ! ! Chemical Equipment and Machinery
Internal power: In ideal power, it refers to the power consumed by all internal energy losses. (Ideal power: The work done per unit time by steam during isentropic expansion in a turbine, with no losses considered.) ) The internal losses of a turbine include: (1) the throttling loss in the steam inlet mechanism ； (2) Pressure loss in the exhaust pipeline ； (3) Intra-stage losses of the turbine. The losses within the stage include: (1) cascade losses ； (2) Residual velocity loss ； (3) Blowing friction loss of the impeller ； (4) Impact loss ； (5) Leaf height loss ； (6) Fan loss ； (7) Partial steam inlet loss ； (8) Moisture vapor loss ； (9) Steam leakage loss.
The internal power of a turbine stage is equal to the product of the effective specific enthalpy drop of that stage and the steam flow rate. According to the principle of energy conservation, the peripheral power and the internal power of a turbine stage are exactly equal.
The specific power of a turbine stage is equal to the product of the effective specific enthalpy drop of that stage and the steam flow rate
Internal power: In ideal power, it refers to the power consumed by all internal energy losses. (Ideal power: The work done per unit time by steam during isentropic expansion in a turbine, with no losses considered.) ) The internal losses of a turbine include: (1) the throttling loss in the steam inlet mechanism ； (2) Pressure loss in the exhaust pipeline ； (3) Intra-stage losses of the turbine. The losses within the stage include: (1) cascade losses ； (2) Residual velocity loss ； (3) Blowing friction loss of the impeller ； (4) Impact loss ； (5) Leaf height loss ； (6) Fan loss ； (7) Partial steam inlet loss ； (8) Moisture vapor loss ； (9) Steam leakage loss.
The internal power of a turbine stage is equal to the product of the effective specific enthalpy drop of that stage and the steam flow rate; it is generally determined by multiplying the flow rate by the specific enthalpy drop. The calculation can be carried out simply by knowing the parameters before and after the stage. Of course, calculations for entire stages or groups of stages are also possible
Internal power: In ideal power, it refers to the power consumed by all internal energy losses. (Ideal power: The work done per unit time by steam during isentropic expansion in a turbine, with no losses considered.) ) The internal losses of a turbine include: (1) the throttling loss in the steam inlet mechanism ； (2) Pressure loss in the exhaust pipeline ； (3) Intra-stage losses of the turbine. The losses within the stage include: (1) cascade losses ； (2) Residual velocity loss ； (3) Blowing friction loss of the impeller ； (4) Impact loss ； (5) Leaf height loss ； (6) Fan loss ； (7) Partial steam inlet loss ； (8) Moisture vapor loss ； (9) Steam leakage loss.