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
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
])
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()