def four_stream():
# Four stream example from
# Pinch Analysis and Process Integration:
# A User Guide On Process Integration for the Efficient Use of Energy,
# Second edition, Ian C. Kemp, page 4
param_dict = dict(PLOT_PARAMS)
param_dict["title"] = "Four stream example"
min_temp_diff = 10
default_temp_shift = min_temp_diff / 2
streams = [
make_stream(-230, 20, 135),
make_stream(330, 170, 60),
make_stream(-240, 80, 140),
make_stream(180, 150, 30),
]
analyzer = PinchAnalyzer(default_temp_shift)
analyzer.add_streams(*streams)
print(param_dict["title"])
print(describe(analyzer))
fig, ax = plot_results(analyzer, param_dict)
plt.show()
def multiple_pinches():
# A made-up example with multiple pinches
param_dict = dict(PLOT_PARAMS)
param_dict["title"] = "Multiple pinches"
min_temp_diff = 10
default_temp_shift = min_temp_diff / 2
cold_1 = make_stream(-360, 30, 150)
hot_1 = make_segmented_stream(
[20, 140, 100],
[90, 100, 100], # A latent segment to model condensation
[30, 100, 60],
)
# The PinchAnalyzer's default temp_shift will be ignored for this stream.
cold_2 = make_stream(-20, 5, 20, temp_shift=2)
hot_2 = make_stream(160, 60, 20)
analyzer = PinchAnalyzer(default_temp_shift)
analyzer.add_streams(cold_1, hot_1, cold_2, hot_2)
print(param_dict["title"])
print(describe(analyzer))
fig, ax = plot_results(analyzer, param_dict)
plt.show()
def aromatics_plant():
# Aromatics plant from
# Pinch Analysis and Process Integration:
# A User Guide On Process Integration for the Efficient Use of Energy,
# Second edition, Ian C. Kemp, page 330
param_dict = dict(PLOT_PARAMS)
param_dict.update({
"title": "Aromatics plant",
"hcc_ccc_xlabel": "Heat flow [ttc/h]",
"gcc_xlabel": "Net heat flow [ttc/h]",
})
min_temp_diff = 10
default_temp_shift = min_temp_diff / 2
# Some of the streams consist of multiple segments with individual heat
# capacities
streams = [
make_segmented_stream([-13.9, 102, 229], [-8.3, 229, 327]),
make_segmented_stream([13.9, 327, 174], [9, 174, 92], [4.2, 92, 50]),
make_stream(-9, 35, 164),
make_segmented_stream([-7.2, 140, 176], [-25.2, 176, 367],
[-16.4, 367, 500]),
make_stream(25.2, 495, 307),
make_segmented_stream([7.2, 220, 160], [3.3, 160, 144],
[4.1, 144, 125], [11.6, 125, 59]),
make_stream(-3.3, 80, 123),
make_stream(-6.8, 59, 169),
make_segmented_stream([6.8, 220, 130], [3.8, 130, 67]),
make_stream(-4.1, 85, 125),
make_stream(-32.5, 480, 500),
]
analyzer = PinchAnalyzer(default_temp_shift)
analyzer.add_streams(*streams)
print(param_dict["title"])
print(describe(analyzer))
plot_results(analyzer, param_dict)
plt.show()
from matplotlib import pyplot as plt
from pina import PinchAnalyzer, make_stream
# Arguments: heat flow, supply temperature, target temperature
cold_1 = make_stream(-230, 20, 135)
hot_1 = make_stream(330, 170, 60)
cold_2 = make_stream(-240, 80, 140)
hot_2 = make_stream(180, 150, 30)
min_temp_diff = 10
temp_shift = min_temp_diff / 2
analyzer = PinchAnalyzer(temp_shift)
analyzer.add_streams(cold_1, hot_1, cold_2, hot_2)
print("Heating demand: {}\n"
"Cooling demand: {}\n"
"Hot utility target: {}\n"
"Cold utility target: {}\n"
"Heat recovery target: {}\n"
"Pinch temperature(s): {}".format(
analyzer.heating_demand,
analyzer.cooling_demand,
analyzer.hot_utility_target,
analyzer.cold_utility_target,
analyzer.heat_recovery_target,
analyzer.pinch_temps,
))
fig, ax = plt.subplots(1, 2, figsize=(16, 7))
def evaporator_dryer_plant():
# Evaporator/dryer plant from
# Pinch Analysis and Process Integration:
# A User Guide On Process Integration for the Efficient Use of Energy,
# Second edition, Ian C. Kemp, page 351
param_dict = dict(PLOT_PARAMS)
param_dict["title"] = "Evaporator/dryer plant"
min_temp_diff = 5.5
default_temp_shift = min_temp_diff / 2
# Some of the streams have equal supply and target temperatures, meaning
# that they transfer latent heat
evaporator_streams = [
make_stream(-183, 10, 70),
make_stream(-198, 37.8, 87.8),
make_stream(-1005.5, 79.4, 79.4),
make_stream(1039, 79.4, 79.4),
make_stream(232, 86.9, 10),
make_stream(-643, 48.8, 48.8),
make_stream(714, 43.3, 43.3),
make_segmented_stream([-6.5, 48.8, 54.4], [-263.5, 54.4, 93.3]),
make_stream(260, 43.3, 43.3),
make_stream(57, 43.3, 10),
]
dryer_streams = [
make_stream(-93.5, 55, 55),
make_stream(-254, 41, 41),
make_stream(-124, 60, 60),
# Some optional streams
# make_stream(149, 41, 13),
# make_stream(140, 60, 13),
# make_stream(189, 55, 13),
]
analyzer = PinchAnalyzer(default_temp_shift)
analyzer.add_streams(*evaporator_streams)
analyzer.add_streams(*dryer_streams)
print(param_dict["title"])
print(describe(analyzer))
fig, ax = plot_results(analyzer, param_dict)
plt.show()