[TRNSYS-users] cogenration feedwater heater to be connected with the next one

[1112102005@ncepu.edu.cn]

Hi，

I purchased TRNSYS 17 and all stec library. From literature(around 2005) I see that someone once used the feedwater heater to be connected with five parts: source steam inlet and oulet; feedwater inlet and outlet, another feedwater heater for drain water heat recovery. In my case, however, Type 622 can only be connected with 4 parts:

Steam Temperature at Inlet

Steam Flow Rate at Inlet

Steam Pressure at Inlet

Steam Enthalpy at Inlet

Condensate Temperature at Inlet

Condensate Flow Rate at Inlet

Condensate Pressure at Inlet

Condensate Enthalpy at Inlet

Terminal Temperature Difference

Drain Cooler Temperature Difference

Outlet Steam Temperature

Outlet Steam Flow-Rate

Outlet Steam Pressure

Outlet Steam Enthalpy

Outlet Condensate Temperature

Outlet Condensate Flowrate

Outlet Condensate Pressure

Outlet Condensate Enthalpy

Could you please inform me how to find out the fifth connection part? The feedwater must be heated by the extration steam as well as the hot water from another heater, and the steam and hot water are seperated, also the feedwater is seperated from the them.

Thank you !

Jingxiao Han