def test_raised_exception_method_selection_01():
"""Test if an exception is raised if unknown method name is passed."""
with pytest.raises(ValueError):
ac.calc_characteristic_temp(t_hot=[85],
t_cool=[30],
t_chill=[15],
coef_a=2.5,
coef_e=1.8,
method='shaken_not_stirred')
def test_raised_exception_argument_length_02():
"""Test if an exception is raised if input argument is too short."""
with pytest.raises(ValueError):
ac.calc_characteristic_temp(t_hot=[85] * 3,
t_cool=[30] * 2,
t_chill=[15] * 3,
coef_a=2.5,
coef_e=1.8,
method='kuehn_and_ziegler')
def test_raised_exception_argument_type_03():
"""Test if an exception is raised if input argument is not a list."""
with pytest.raises(TypeError):
ac.calc_characteristic_temp(t_hot=[85],
t_cool=[30],
t_chill=15,
coef_a=2.5,
coef_e=1.8,
method='kuehn_and_ziegler')
def test_calc_characteristic_temp_input_list_single_entry():
"""Test if calc_characteristic_temp works with lists of
length 1 (a single entry) as input for all three temperatures."""
ddt = ac.calc_characteristic_temp(t_hot=[85],
t_cool=[30],
t_chill=[15],
coef_a=2.5,
coef_e=1.8,
method='kuehn_and_ziegler')
assert ddt == [37]
def test_calc_characteristic_temp_Safarik():
"""Test characteristic temperature calculation for chiller 'Safarik'."""
filename_charpara = os.path.join(
os.path.dirname(__file__),
'../examples/absorption_heatpump_and_chiller/'
'data/characteristic_parameters.csv')
charpara = pd.read_csv(filename_charpara)
chiller_name = 'Safarik'
n = 2
ddt = ac.calc_characteristic_temp(
t_hot=[85] * n,
t_cool=[30],
t_chill=[15],
coef_a=charpara[(charpara['name'] == chiller_name)]['a'].values[0],
coef_e=charpara[(charpara['name'] == chiller_name)]['e'].values[0],
method='kuehn_and_ziegler')
assert ddt == [approx(54.64), approx(54.64)]
import oemof.thermal.absorption_heatpumps_and_chillers as abs_hp_chiller
import matplotlib.pyplot as plt
import os
import pandas as pd
filename = os.path.join(os.path.dirname(__file__),
'data/characteristic_parameters.csv')
charpara = pd.read_csv(filename)
chiller_name = 'Kuehn'
t_cooling = [23, 25, 27, 29, 31, 33, 35, 36, 37, 38, 39, 40]
ddt_75 = abs_hp_chiller.calc_characteristic_temp(
t_hot=[75],
t_cool=t_cooling,
t_chill=[15],
coef_a=charpara[(charpara['name'] == chiller_name)]['a'].values[0],
coef_e=charpara[(charpara['name'] == chiller_name)]['e'].values[0],
method='kuehn_and_ziegler')
Q_dots_evap_75 = abs_hp_chiller.calc_heat_flux(
ddts=ddt_75,
coef_s=charpara[(charpara['name'] == chiller_name)]['s_E'].values[0],
coef_r=charpara[(charpara['name'] == chiller_name)]['r_E'].values[0],
method='kuehn_and_ziegler')
Q_dots_gen_75 = abs_hp_chiller.calc_heat_flux(
ddts=ddt_75,
coef_s=charpara[(charpara['name'] == chiller_name)]['s_G'].values[0],
coef_r=charpara[(charpara['name'] == chiller_name)]['r_G'].values[0],
method='kuehn_and_ziegler')
COPs_75 = [Qevap / Qgen for Qgen, Qevap in zip(Q_dots_gen_75, Q_dots_evap_75)]