def CalNodeProperties(nodes):
""" get node properties using seuif97 """
for node in nodes:
if node['p'] != None and node['t'] != None:
node['h'] = pt2h(node['p'], node['t'])
node['s'] = pt2s(node['p'], node['t'])
node['x'] = pt2x(node['p'], node['t'])
elif node['p'] != None and node['x'] != None:
node['t'] = px2t(node['p'], node['x'])
node['h'] = px2h(node['p'], node['x'])
node['s'] = px2s(node['p'], node['x'])
elif node['t'] != None and node['x'] != None:
node['p'] = tx2p(node['t'], node['x'])
node['h'] = tx2h(node['t'], node['x'])
node['s'] = tx2s(node['t'], node['x'])
def tx(self):
self.p = if97.tx2p(self.t, self.x)
self.h = if97.tx2h(self.t, self.x)
self.s = if97.tx2s(self.t, self.x)
self.v = if97.tx2v(self.t, self.x)
# Isotherm lines to plot, values in ºC
isot = np.array([0, 50, 100, 200, 300, 400, 500, 600, 700, 800])
isop = np.array([Pt, 0.001, 0.01, 0.1, 1, 10, 20, 50, 100])
for t in isot:
h = np.array([pt2h(p, t) for p in isop])
s = np.array([pt2s(p, t) for p in isop])
plt.plot(s, h, 'g', lw=0.5)
# Isobar lines to plot
for p in isop:
h = np.array([pt2h(p, t) for t in isot])
s = np.array([pt2s(p, t) for t in isot])
plt.plot(s, h, 'b', lw=0.5)
tc = 647.096 - 273.15
T = np.linspace(0.1, tc, 100)
# Calculate saturation line
for x in np.array([0, 1.0]):
h = np.array([tx2h(t, x) for t in T])
s = np.array([tx2s(t, x) for t in T])
plt.plot(s, h, 'r', lw=1.0)
# Isoquality lines to plot
isox = np.linspace(0.1, 0.9, 11)
for x in isox:
h = np.array([tx2h(t, x) for t in T])
s = np.array([tx2s(t, x) for t in T])
plt.plot(s, h, 'r--', lw=0.5)
plt.show()
def tx(self):
self.p = if97.tx2p(self.t, self.x)
self.h = if97.tx2h(self.t, self.x)
self.s = if97.tx2s(self.t, self.x)
self.v = if97.tx2v(self.t, self.x)
