请问在hammer中节流控制阀和流量控制阀有什么区别？

In English:

For the Flow Control Valve (FCV), the valve will automatically change its headloss in the initial conditions (steady state), to meet the target flow. This results in a specific flow and headloss pair that HAMMER uses during the transient simulation to model headloss through the valve. The FCV will not change position automatically during the transient simulation because it assumes that the transient event will be too fast compared to how fast the FCV modulation will react. For the transient simulation, you can have the FCV close or open based on a pattern "operating rule". This valve is appropriate for cases where you have a valve that automatically throttles to restrict flow to a desired target, so that you can establish that flow and headloss during the initial conditions.

For the Throttle Control Valve (TCV), the headloss through the valve is entered manually for the initial conditions, and the user has several different options for how to define the valve characteristics. For example headloss coefficient (K), discharge coefficient (Cv), percent closed, etc. Similar to the FCV, you can then enter a pattern of open/closure over time during the transient simulation (operating rule). This valve is appropriate for cases where you want to model a valve that opens or closes during the transient simulation, and need to be specific and detailed about the valve's coefficient, valve type, valve characteristics, closure pattern, etc.

See more here: Modeling Reference - Valve Closure

用中文（表达：

对于流量控制阀（FCV），阀门将在初始条件（稳态）下自动改变其水头损失，以满足目标流量。这导致HAMMER在瞬态模拟期间使用特定的流量和水头损失对来模拟通过阀门的水头损失。在瞬态仿真期间，FCV不会自动改变位置，因为它假设瞬态事件与FCV调制的反应速度相比会过快。对于瞬态模拟，您可以根据模式“操作规则”关闭或打开FCV。该阀适用于阀门自动节流以限制流向所需目标的情况，以便在初始条件下确定流量和水头损失。

对于节气门控制阀（TCV），在初始条件下手动输入通过阀门的水头损失，并且用户有多种不同的选项可用于定义阀门特性。例如，水龙头损失系数（K），流量系数（Cv），闭合百分比等。与FCV类似，您可以在瞬态模拟（操作规则）期间输入开/关模式。该阀适用于您想要在瞬态模拟过程中打开或关闭阀门的模型，并且需要具体详细说明阀门的系数，阀门类型，阀门特性，闭合模式等。

在这里查看更多：Modeling Reference - Valve Closure