예제 #1
0
 def calc_st2_o(self):
     st2_o = Stream()
     st2_o.fluid = self.st2_i.fluid
     st2_o.flow_rate = self.st2_i.flow_rate
     st2_o.pressure = self.st2_i.pressure - self.pressure_drop(
         self.st2_i, self.st2_pip)
     h = self.st2_i.h - (self.st1_i.h - self.st1_o.h) * self.st1_i.flow_rate[0] \
         / st2_o.flow_rate[0] / self.eta
     h_l = PropsSI('H', 'P', st2_o.pressure, 'Q', 0, st2_o.fluid)
     h_g = PropsSI('H', 'P', st2_o.pressure, 'Q', 1, st2_o.fluid)
     if h_l <= h <= h_g:
         st2_o.x = PropsSI('Q', 'P', st2_o.pressure, 'H', h, st2_o.fluid)
     else:
         st2_o.temperature = PropsSI('T', 'P', st2_o.pressure, 'H', h,
                                     st2_o.fluid)
     self.st2_o = st2_o
예제 #2
0
 def get_st2(self, st1, pressure2):
     st2 = Stream()
     st2.fluid = st1.fluid
     st2.flow_rate = st1.flow_rate
     st2.pressure = pressure2
     s_ideal = st1.s
     h2_ideal = PropsSI('H', 'S', s_ideal, 'P', st2.pressure, st2.fluid)
     eta = self.calculate_eta(st1.pressure, st2.pressure)
     h2 = st1.h - eta * (st1.h - h2_ideal)
     # Check whether it is saturated
     h2_l = PropsSI('H', 'P', st2.pressure, 'Q', 0, st2.fluid)
     h2_g = PropsSI('H', 'P', st2.pressure, 'Q', 1, st2.fluid)
     if h2_l <= h2 <= h2_g:
         st2.quality = PropsSI('Q', 'P', st2.pressure, 'H', h2, st2.fluid)
     else:
         st2.temperature = PropsSI('T', 'P', st2.pressure, 'H', h2,
                                   st2.fluid)
     return st2
예제 #3
0
        ])

    def get_A(self):
        # Known inlet and outlet fluids to calculate the aperture area
        self.st_o.fluid = self.st_i.fluid
        self.st_o.flow_rate = self.st_i.flow_rate
        # Assume no pressure loss
        self.st_o.pressure = self.st_i.pressure
        self.st_o.pressure = self.st_i.pressure
        guess = np.array([500, 300, 19])
        # options = optimset('Display','iter')
        x = fsolve(self.CalcDishCollector3, guess)
        self.A = x[2]


if __name__ == '__main__':
    dc = DishCollector()
    st_i = Stream()
    st_i.fluid = Const.FLUID[2]
    st_i.temperature = Const.convert_temperature(150, 'C', 'K')
    st_i.pressure = 4e5
    st_i.flow_rate[0] = 0.07
    dc.st_i = st_i
    st_o = Stream()
    st_o.fluid = Const.FLUID[2]
    # st_o.temperature = Const.convert_temperature(239.26, 'C', 'K')
    st_o.pressure = 4e5
    dc.st_o = st_o
    dc.amb.irradiance = 700
    dc.get_T_o()