【Mechanical Equipment Technology Exchange Edition】Mechanical Equipment 【Daily Question】201200114
Thread Content
Question: What is the reheat phenomenon in multi-stage steam turbines? 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
The entropy increase caused by losses in the upper stages leads to an increased ideal enthalpy drop in the subsequent stages; this phenomenon is known as the reheat effect in multi-stage steam turbines. (In the process of doing work, all the losses (internal losses) of the turbine are converted into heat energy, which is absorbed by the steam, causing the enthalpy at the exit of each stage to increase in accordance with the increase in entropy.) Since the isobaric lines expand in the direction of increasing entropy, this leads to a greater ideal enthalpy drop later on. In other words, in a multi-stage turbine, the losses in the earlier stages can be partially utilized in the subsequent stages. This phenomenon is known as the reheat effect in steam turbines. ）
When steam undergoes energy conversion within a multi-stage turbine, all internal losses due to friction are converted into heat, which is absorbed by the steam under adiabatic conditions. As a result, the exhaust steam temperature at each stage increases, and the thermodynamic process line for the subsequent stage shifts to the right. Under the condition that the steam pressures before and after this stage remain constant, the ideal enthalpy drop of the steam within that stage increases accordingly. This phenomenon is known as reheat.
The loss in a multi-stage turbine stage raises the steam temperature of the subsequent stage, causing the isentropic enthalpy drop in that stage to increase slightly compared to the case without losses in the previous stage under the same pressure difference. This phenomenon is known as the reheat effect in turbines.
The loss in a multi-stage turbine stage raises the steam temperature of the subsequent stage, causing the isentropic enthalpy drop in that stage to increase slightly compared to the case without losses in the previous stage under the same pressure difference. This phenomenon is known as the reheat effect in turbines.
When steam undergoes energy conversion within a multi-stage turbine, all internal losses due to friction are converted into heat, which is absorbed by the steam under adiabatic conditions. As a result, the exhaust steam temperature at each stage increases, and the thermodynamic process line for the subsequent stage shifts to the right. Under the condition that the steam pressures before and after this stage remain constant, the ideal enthalpy drop of the steam within that stage increases accordingly. This phenomenon is known as reheat.
When steam undergoes energy conversion within a multi-stage turbine, all internal losses due to friction are converted into heat, which is absorbed by the steam under adiabatic conditions. As a result, the exhaust steam temperature at each stage increases, and the thermodynamic process line for the subsequent stage shifts to the right. Under the condition that the steam pressures before and after this stage remain constant, the ideal enthalpy drop of the steam within that stage increases accordingly. This phenomenon is known as reheat.
When steam undergoes energy conversion within a multi-stage turbine, all internal losses due to friction are converted into heat, which is absorbed by the steam under adiabatic conditions. As a result, the exhaust steam temperature at each stage increases, and the thermodynamic process line for the subsequent stage shifts to the right. Under the condition that the steam pressures before and after this stage remain constant, the ideal enthalpy drop of the steam within that stage increases accordingly. This phenomenon is known as reheat.
When steam undergoes energy conversion within a multi-stage turbine, all internal losses due to friction are converted into heat, which is absorbed by the steam under adiabatic conditions. As a result, the exhaust steam temperature at each stage increases, and the thermodynamic process line for the subsequent stage shifts to the right. Under the condition that the steam pressures before and after this stage remain constant, the ideal enthalpy drop of the steam within that stage increases accordingly. This phenomenon is known as reheat.
When steam undergoes energy conversion within a multi-stage turbine, all internal losses due to friction are converted into heat, which is absorbed by the steam under adiabatic conditions. As a result, the exhaust steam temperature at each stage increases, and the thermodynamic process line for the subsequent stage shifts to the right. Under the condition that the steam pressures before and after this stage remain constant, the ideal enthalpy drop of the steam within that stage increases accordingly. This phenomenon is known as reheat.
When steam undergoes energy conversion within a multi-stage turbine, all internal losses due to friction are converted into heat, which is absorbed by the steam under adiabatic conditions. As a result, the exhaust steam temperature at each stage increases, and the thermodynamic process line for the subsequent stage shifts to the right. Under the condition that the steam pressures before and after this stage remain constant, the ideal enthalpy drop of the steam within that stage increases accordingly. This phenomenon is known as reheat.