- #1
Stefan2015
- 4
- 0
Hi everybody,
I am trying to build a small model which basically should be able output "mass flow of water vapor as a function of time" given following inputs:
- initial mass liquid water m_l_0 [kg]
- initial temperature of liquid water T_l_0 [°C]
- initial pressure p_0 [Pa]
- heat added as a function of time q(t) [J/s]
- pressure as a function of time p(t) [Pa]
So for example a vessel with m_l_0 = 100 kg and T_l_0 = 80 °C is given.
The heat added function q(t) = q1 for time t>=0 & t<t1 and q(t) = q2 for t>=t1.
The pressure p(t) is given as a linear function with p(t) = p_0 - C x T, with C being some constant [Pa/°C].
Given this example, what will the mass flow of water vapor m_vap(t) be?
I started by calculating the system given enthalpy H_sys = m x T x cp and comparing it to the maximum enthalpy of the system at boiling point H_max = m x T_boil(p) x cp (which is pressure dependent). Once H_sys >H_max vapor will be released...
I would like to know how what you think will be the best approach for to do so?
Thank you!
Stefan
I am trying to build a small model which basically should be able output "mass flow of water vapor as a function of time" given following inputs:
- initial mass liquid water m_l_0 [kg]
- initial temperature of liquid water T_l_0 [°C]
- initial pressure p_0 [Pa]
- heat added as a function of time q(t) [J/s]
- pressure as a function of time p(t) [Pa]
So for example a vessel with m_l_0 = 100 kg and T_l_0 = 80 °C is given.
The heat added function q(t) = q1 for time t>=0 & t<t1 and q(t) = q2 for t>=t1.
The pressure p(t) is given as a linear function with p(t) = p_0 - C x T, with C being some constant [Pa/°C].
Given this example, what will the mass flow of water vapor m_vap(t) be?
I started by calculating the system given enthalpy H_sys = m x T x cp and comparing it to the maximum enthalpy of the system at boiling point H_max = m x T_boil(p) x cp (which is pressure dependent). Once H_sys >H_max vapor will be released...
I would like to know how what you think will be the best approach for to do so?
Thank you!
Stefan