diff --git a/tests/test_system.py b/tests/test_system.py
index 138ef4c17cd4f28f7b03086abceb38fee8c2465c..9d5c5ef59f816cdfc83689b06d5ed78936cd2389 100644
--- a/tests/test_system.py
+++ b/tests/test_system.py
@@ -1,11 +1,11 @@
-
+import math
from numbers import Real
from src.topupheat.common.fluids import FluidDatabase
from src.topupheat.pipes.system import SupplyReturnPipeSystem
from src.topupheat.pipes.single import StandardisedPipeDatabase
from src.topupheat.pipes.single import Pipe, InsulatedPipe,StandardisedPipe
from src.topupheat.pipes.twin import SymmetricalTwinPipe, StandardisedTwinPipe
-from math import isclose, inf, ceil
+from math import isclose, ceil
# *****************************************************************************
# *****************************************************************************
@@ -15,517 +15,518 @@ class TestPipeSystem:
# TODO: these cases
def test_simplified_heat_transfer_surroundings_nonvector_single_step(self):
-
- pass
-
- def test_simplified_heat_transfer_surroundings_nonvector_multi_step(self):
-
- pass
- def test_simplified_heat_transfer_surroundings_vector_single_step(self):
+ # maximum specific pressure drop
+ max_specific_pressure_loss = 80 # Pa/m
+
+ # district heating details
+ dh_flow_temperature = 273.15+70 # K
+ dh_return_temperature = 273.15+40 # K
- pass
+ # ground temperature
+ ground_temperature = 273.15+10 # K
+
+ # pipe absolute/effective roughness
+ pipe_e_eff = 0.01/1000 # m
+
+ # pipe length
+ pipe_length = 1000
+
+ # pipe data
+ pipedata_files = [
+ 'tests/data/isoplus_twin_disconti_s1.csv',
+ # 'tests/data/isoplus_twin_disconti_s2.csv',
+ # 'tests/data/isoplus_twin_disconti_s3.csv',
+ ]
- def test_simplified_heat_transfer_surroundings_vector_multi_step(self):
+ # pipe data
+ pipedb = StandardisedPipeDatabase(source=pipedata_files)
+
+ # fluid data
+ fluiddata_file = 'tests/data/incropera2006_saturated_water.csv'
+ fluiddb = FluidDatabase(fluid='water', phase='l', source=fluiddata_file)
+
+ # pipe tuples
+ list_pipe_tuples = [
+ pipe_tuple
+ for pipe_tuple in pipedb.pipe_tuples
+ ]
+ # pipe objects
+ list_pipes = [
+ StandardisedTwinPipe(
+ pipe_tuple=pipe_tuple,
+ e_eff=pipe_e_eff, # override pipe absolute roughness
+ length=pipe_length, # override the pipe length
+ db=pipedb)
+ for pipe_tuple in list_pipe_tuples
+ ]
- pass
-
-
- def test_simplified_heat_transfer_surroundings(self):
+ # two pipe system object
+ two_pipe_system = SupplyReturnPipeSystem(
+ fluid_db=fluiddb,
+ phase=fluiddb.fluid_LIQUID,
+ pressure=1e5,
+ supply_temperature=dh_flow_temperature,
+ return_temperature=dh_return_temperature,
+ max_specific_pressure_loss=max_specific_pressure_loss,
+ supply_pipe=list_pipes[0]
+ )
+ assert not two_pipe_system.vector_mode
+ assert two_pipe_system.number_options() == 1
+
+ # non-vector mode, one u value per option, and one temperature
+ u = 1
+ # q should be a number
+ q = two_pipe_system.simplified_specific_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ )
+ assert isinstance(q, Real)
+ assert 1 == two_pipe_system.number_options()
+ assert math.isclose(
+ q,
+ u*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature),
+ abs_tol=1e-3
+ )
+ # test unit conversion
+ u_factor = 2
+ q = two_pipe_system.simplified_specific_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ unit_conversion_factor=u_factor
+ )
+ assert isinstance(q, Real)
+ assert 1 == two_pipe_system.number_options()
+ assert math.isclose(
+ q,
+ u*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature)*u_factor,
+ abs_tol=1e-3
+ )
- # load pipe data
-
- singlepipedata_files = ['tests/data/enerpipe_caldopex_single.csv']
- singlepipedb = StandardisedPipeDatabase(source=singlepipedata_files)
+ # with length and time interval duration
+ length = 3
+ time_interval_duration = 10
+ q = two_pipe_system.simplified_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ time_interval_duration=time_interval_duration,
+ length=length
+ )
+ assert isinstance(q, Real)
+ assert 1 == two_pipe_system.number_options()
+ assert math.isclose(
+ q,
+ u*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature)*length*time_interval_duration,
+ abs_tol=1e-3
+ )
+ # use unit conversion
+ u_factor = 2
+ q = two_pipe_system.simplified_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ time_interval_duration=time_interval_duration,
+ length=length,
+ unit_conversion_factor=u_factor
+ )
+ assert isinstance(q, Real)
+ assert 1 == two_pipe_system.number_options()
+ assert math.isclose(
+ q,
+ u*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature)*length*time_interval_duration*u_factor,
+ abs_tol=1e-3
+ )
- # water
+ # *************************************************************************
+ # *************************************************************************
- waterdata_file = 'tests/data/incropera2006_saturated_water.csv'
- phase = FluidDatabase.fluid_LIQUID
- fluid_db = FluidDatabase(
- fluid='fluid',
- phase=phase,
- source=waterdata_file
- )
+ def test_simplified_heat_transfer_surroundings_nonvector_multi_step(self):
+
+ # maximum specific pressure drop
+ max_specific_pressure_loss = 80 # Pa/m
+
+ # district heating details
+ dh_flow_temperature = 273.15+70 # K
+ dh_return_temperature = 273.15+40 # K
- supply_temperature = 80+273.15
- return_temperature = 50+273.15
- pressure = 1e5
- max_specific_pressure_loss = 100 # Pa/m
- temperature_surroundings = 10+273.15
-
- pipe_tuples = [
- (20,2), # 1
- (25,2), # 2
- (32,2), # 3
- (40,2), # 4
- (50,2), # 5
- (65,2), # 6 twin pipe too! the DN is all that matters here
- (80,2), # 7
- (100,2), # 8
- (125,2), # 9
- (150,1) # 11
- ]
-
- pipes = {
- pipe_tuple[0:2]: StandardisedPipe(
- pipe_tuple=pipe_tuple,
- db=singlepipedb)
- for pipe_tuple in singlepipedb.pipe_tuples
- }
+ # ground temperature
+ ground_temperature = 273.15+10 # K
- u_coefficients = [
- 0.1392/2, # 1
- 0.1571/2, # 2
- 0.1741/2, # 3
- 0.1662/2, # 4
- 0.2075/2, # 5
- 0.2802/2, # 6
- 0.1747, # 7
- 0.1992, # 8
- 0.2771, # 9
- 0.3028 # 11
- ]
-
- # specific heat losses extracted graphically from the paper
- specific_heat_losses = [
- 7.653, # 1
- 8.6724, # 2
- 9.5565, # 3
- 9.1742, # 4
- 11.3841, # 5
- 15.4729, # 6
- 19.2494, # 7
- 21.9193, # 8
- 30.4776, # 9
- 33.3056 # 11
+ # pipe absolute/effective roughness
+ pipe_e_eff = 0.01/1000 # m
+
+ # pipe length
+ pipe_length = 1000
+
+ # pipe data
+ pipedata_files = [
+ 'tests/data/isoplus_twin_disconti_s1.csv',
+ # 'tests/data/isoplus_twin_disconti_s2.csv',
+ # 'tests/data/isoplus_twin_disconti_s3.csv',
]
- specific_heat_losses_tol = [
- 3.1e-3, # 1 : 0.0030000000000001137
- 0.0320, # 2 : 0.03190000000000026
- 0.0191, # 3 : 0.019000000000000128
- 0.0333, # 4 : 0.033200000000000784
- 0.0284, # 5 : 0.028399999999999537
- 0.0619, # 6 : 0.06189999999999962
- 0.0325, # 7 : 0.03240000000000265
- 0.0074, # 8 : 0.00730000000000075
- 0.0035, # 9 : 0.003400000000002734
- 0.0025, # 11: 0.002400000000001512
+ # pipe data
+ pipedb = StandardisedPipeDatabase(source=pipedata_files)
+
+ # fluid data
+ fluiddata_file = 'tests/data/incropera2006_saturated_water.csv'
+ fluiddb = FluidDatabase(fluid='water', phase='l', source=fluiddata_file)
+
+ # pipe tuples
+ list_pipe_tuples = [
+ pipe_tuple
+ for pipe_tuple in pipedb.pipe_tuples
+ ]
+ # pipe objects
+ list_pipes = [
+ StandardisedTwinPipe(
+ pipe_tuple=pipe_tuple,
+ e_eff=pipe_e_eff, # override pipe absolute roughness
+ length=pipe_length, # override the pipe length
+ db=pipedb)
+ for pipe_tuple in list_pipe_tuples
]
- # pipe
- for pipe_tuple, sht_true, sht_tol, u_coef in zip(
- pipe_tuples,
- specific_heat_losses,
- specific_heat_losses_tol,
- u_coefficients
- ):
-
- srps = SupplyReturnPipeSystem(
- fluid_db=fluid_db,
- phase=phase,
- pressure=pressure,
- supply_temperature=supply_temperature,
- return_temperature=return_temperature,
- supply_pipe=pipes[pipe_tuple],
- max_specific_pressure_loss=max_specific_pressure_loss # Pa/m
+ # two pipe system object
+ two_pipe_system = SupplyReturnPipeSystem(
+ fluid_db=fluiddb,
+ phase=fluiddb.fluid_LIQUID,
+ pressure=1e5,
+ supply_temperature=dh_flow_temperature,
+ return_temperature=dh_return_temperature,
+ max_specific_pressure_loss=max_specific_pressure_loss,
+ supply_pipe=list_pipes[0]
+ )
+ assert not two_pipe_system.vector_mode
+ assert two_pipe_system.number_options() == 1
+
+ # non-vector mode, one u value per time interval (and option), multiple temperatures
+ number_time_intervals = 3
+ u = [1+k for k in range(number_time_intervals)]
+ t_surroundings = [ground_temperature+k for k in range(number_time_intervals)]
+ # q should be a list of lists
+ q = two_pipe_system.simplified_specific_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=t_surroundings,
+ )
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == number_time_intervals
+ for u_i, q_i, t_i in zip(u, q, t_surroundings):
+ assert isinstance(q_i, Real)
+ assert math.isclose(
+ q_i,
+ u_i*(dh_flow_temperature/2+dh_return_temperature/2-t_i),
+ abs_tol=1e-3
)
-
- sht = srps.simplified_heat_transfer_surroundings(
- length=1,
- specific_heat_transfer_coefficient=u_coef,
- temperature_surroundings=temperature_surroundings,
- time_interval_duration=1
+ # use unit conversion
+ u_factor = 2
+ q = two_pipe_system.simplified_specific_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=t_surroundings,
+ unit_conversion_factor=u_factor
+ )
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == number_time_intervals
+ for u_i, q_i, t_i in zip(u, q, t_surroundings):
+ assert isinstance(q_i, Real)
+ assert math.isclose(
+ q_i,
+ u_i*(dh_flow_temperature/2+dh_return_temperature/2-t_i)*u_factor,
+ abs_tol=1e-3
)
+
+ # *************************************************************************
+ # *************************************************************************
- assert isclose(sht, sht_true, abs_tol=sht_tol)
+ def test_simplified_heat_transfer_surroundings_vector_single_step(self):
- sht = srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coef,
- temperature_surroundings=temperature_surroundings,
- )
-
- assert isclose(sht, sht_true, abs_tol=sht_tol)
-
- number_steps = 2
-
- sht = srps.simplified_heat_transfer_surroundings(
- length=1,
- specific_heat_transfer_coefficient=u_coef,
- temperature_surroundings=[
- temperature_surroundings for i in range(number_steps)],
- time_interval_duration=[
- 1 for i in range(number_steps)],
- )
- assert type(sht) == list
- assert len(sht) == number_steps
- for _sht in sht:
- assert isclose(_sht, sht_true, abs_tol=sht_tol)
-
- sht = srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coef,
- temperature_surroundings=[
- temperature_surroundings for i in range(number_steps)],
- )
- assert type(sht) == list
- assert len(sht) == number_steps
- for _sht in sht:
- assert isclose(_sht, sht_true, abs_tol=sht_tol)
-
- # try using incorrect option-based inputs
-
- error_raised = False
- try:
- srps.simplified_heat_transfer_surroundings(
- length=[1],
- specific_heat_transfer_coefficient=[u_coef],
- temperature_surroundings=temperature_surroundings,
- time_interval_duration=1
- )
- except TypeError:
- error_raised = True
- assert error_raised
-
- error_raised = False
- try:
- srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=[u_coef],
- temperature_surroundings=temperature_surroundings
- )
- except TypeError:
- error_raised = True
- assert error_raised
-
- # *****************************************************************
-
- # try using other units
- ucf = 2
- sht = srps.simplified_heat_transfer_surroundings(
- length=1,
- specific_heat_transfer_coefficient=u_coef,
- temperature_surroundings=temperature_surroundings,
- time_interval_duration=1,
- unit_conversion_factor=ucf
+ # maximum specific pressure drop
+ max_specific_pressure_loss = 80 # Pa/m
+
+ # district heating details
+ dh_flow_temperature = 273.15+70 # K
+ dh_return_temperature = 273.15+40 # K
+ # ground temperature
+ ground_temperature = 273.15+10 # K
+
+ # pipe absolute/effective roughness
+ pipe_e_eff = 0.01/1000 # m
+
+ # pipe length
+ pipe_length = 1000
+
+ # pipe data
+ pipedata_files = [
+ 'tests/data/isoplus_single_disconti_s1.csv',
+ # 'tests/data/isoplus_single_disconti_s2.csv',
+ # 'tests/data/isoplus_single_disconti_s3.csv',
+ ]
+
+ # pipe data
+ pipedb = StandardisedPipeDatabase(source=pipedata_files)
+
+ # fluid data
+ fluiddata_file = 'tests/data/incropera2006_saturated_water.csv'
+ fluiddb = FluidDatabase(fluid='water', phase='l', source=fluiddata_file)
+
+ # pipe tuples
+ list_pipe_tuples = [
+ pipe_tuple
+ for pipe_tuple in pipedb.pipe_tuples
+ ]
+
+ # pipe objects
+ list_pipes = [
+ StandardisedPipe(
+ pipe_tuple=pipe_tuple,
+ e_eff=pipe_e_eff, # override pipe absolute roughness
+ length=pipe_length, # override the pipe length
+ db=pipedb)
+ for pipe_tuple in list_pipe_tuples
+ ]
+ number_options = len(list_pipes)
+ # two pipe system
+ two_pipe_system = SupplyReturnPipeSystem(
+ fluid_db=fluiddb,
+ phase=fluiddb.fluid_LIQUID,
+ pressure=[1e5 for i in range(number_options)],
+ supply_temperature=[dh_flow_temperature for i in range(number_options)],
+ return_temperature=[dh_return_temperature for i in range(number_options)],
+ max_specific_pressure_loss=[max_specific_pressure_loss for i in range(number_options)],
+ supply_pipe=list_pipes
+ )
+ assert two_pipe_system.vector_mode
+ assert two_pipe_system.number_options() == len(list_pipes)
+
+ # vector mode, one u value per option, and one temperature
+ u = [i+1 for i in range(len(list_pipe_tuples))]
+ # q should be a list of numbers
+ q = two_pipe_system.simplified_specific_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ )
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == two_pipe_system.number_options()
+ for u_i, q_i in zip(u, q):
+ assert math.isclose(
+ q_i,
+ u_i*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature),
+ abs_tol=1e-3
)
-
- assert isclose(sht, sht_true*ucf, abs_tol=sht_tol*ucf)
-
- ucf = 2
- sht = srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coef,
- temperature_surroundings=temperature_surroundings,
- unit_conversion_factor=ucf
+ # use unit conversion
+ u_factor = 2
+ q = two_pipe_system.simplified_specific_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ unit_conversion_factor=u_factor
+ )
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == two_pipe_system.number_options()
+ for u_i, q_i in zip(u, q):
+ assert math.isclose(
+ q_i,
+ u_i*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature)*u_factor,
+ abs_tol=1e-3
)
-
- assert isclose(sht, sht_true*ucf, abs_tol=sht_tol*ucf)
-
- number_steps = 2
-
- sht = srps.simplified_heat_transfer_surroundings(
- length=1,
- specific_heat_transfer_coefficient=u_coef,
- temperature_surroundings=[
- temperature_surroundings for i in range(number_steps)],
- time_interval_duration=[
- 1 for i in range(number_steps)],
- unit_conversion_factor=ucf
+
+ # with length and time interval duration
+ time_interval_duration = 10
+ lengths = [3+i for i in range(two_pipe_system.number_options())]
+ q = two_pipe_system.simplified_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ time_interval_duration=time_interval_duration,
+ length=lengths
+ )
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == two_pipe_system.number_options()
+ for u_i, q_i, l in zip(u, q, lengths):
+ assert math.isclose(
+ q_i,
+ u_i*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature)*l*time_interval_duration,
+ abs_tol=1e-3
)
- assert type(sht) == list
- assert len(sht) == number_steps
- for _sht in sht:
- assert isclose(_sht, sht_true*ucf, abs_tol=sht_tol*ucf)
-
- sht = srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coef,
- temperature_surroundings=[
- temperature_surroundings for i in range(number_steps)],
- unit_conversion_factor=ucf
+ # use unit conversion
+ q = two_pipe_system.simplified_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ time_interval_duration=time_interval_duration,
+ length=lengths,
+ unit_conversion_factor=u_factor
+ )
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == two_pipe_system.number_options()
+ for u_i, q_i, l in zip(u, q, lengths):
+ assert math.isclose(
+ q_i,
+ u_i*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature)*l*time_interval_duration*u_factor,
+ abs_tol=1e-3
)
- assert type(sht) == list
- assert len(sht) == number_steps
- for _sht in sht:
- assert isclose(_sht, sht_true*ucf, abs_tol=sht_tol*ucf)
-
- # *************************************************************************
- def test_simplified_heat_transfer_surroundings_vector(self):
-
- # load pipe data
-
- singlepipedata_files = ['tests/data/enerpipe_caldopex_single.csv']
- singlepipedb = StandardisedPipeDatabase(source=singlepipedata_files)
-
- # water
+ # *************************************************************************
+ # *************************************************************************
- waterdata_file = 'tests/data/incropera2006_saturated_water.csv'
- phase = FluidDatabase.fluid_LIQUID
- fluid_db = FluidDatabase(
- fluid='fluid',
- phase=phase,
- source=waterdata_file
- )
+ def test_simplified_heat_transfer_surroundings_vector_multi_step(self):
- supply_temperature = 80+273.15
- return_temperature = 50+273.15
- pressure = 1e5
- max_specific_pressure_loss = 100 # Pa/m
- temperature_surroundings = 10+273.15
-
- pipe_tuples = [
- (20,2), # 1
- (25,2), # 2
- (32,2), # 3
- (40,2), # 4
- (50,2), # 5
- (65,2), # 6 twin pipe too! the DN is all that matters here
- (80,2), # 7
- (100,2), # 8
- (125,2), # 9
- (150,1) # 11
- ]
-
- pipes = {
- pipe_tuple[0:2]: StandardisedPipe(
- pipe_tuple=pipe_tuple,
- db=singlepipedb)
- for pipe_tuple in singlepipedb.pipe_tuples
- }
+ # maximum specific pressure drop
+ max_specific_pressure_loss = 80 # Pa/m
+
+ # district heating details
+ dh_flow_temperature = 273.15+70 # K
+ dh_return_temperature = 273.15+40 # K
+ # ground temperature
+ ground_temperature = 273.15+10 # K
- u_coefficients = [
- 0.1392/2, # 1
- 0.1571/2, # 2
- 0.1741/2, # 3
- 0.1662/2, # 4
- 0.2075/2, # 5
- 0.2802/2, # 6
- 0.1747, # 7
- 0.1992, # 8
- 0.2771, # 9
- 0.3028 # 11
+ # pipe absolute/effective roughness
+ pipe_e_eff = 0.01/1000 # m
+
+ # pipe length
+ pipe_length = 1000
+
+ # pipe data
+ pipedata_files = [
+ 'tests/data/isoplus_single_disconti_s1.csv',
+ # 'tests/data/isoplus_single_disconti_s2.csv',
+ # 'tests/data/isoplus_single_disconti_s3.csv',
]
-
- # specific heat losses extracted graphically from the paper
- specific_heat_losses = [
- 7.653, # 1
- 8.6724, # 2
- 9.5565, # 3
- 9.1742, # 4
- 11.3841, # 5
- 15.4729, # 6
- 19.2494, # 7
- 21.9193, # 8
- 30.4776, # 9
- 33.3056 # 11
+
+ # pipe data
+ pipedb = StandardisedPipeDatabase(source=pipedata_files)
+
+ # fluid data
+ fluiddata_file = 'tests/data/incropera2006_saturated_water.csv'
+ fluiddb = FluidDatabase(fluid='water', phase='l', source=fluiddata_file)
+
+ # pipe tuples
+ list_pipe_tuples = [
+ pipe_tuple
+ for pipe_tuple in pipedb.pipe_tuples
]
- specific_heat_losses_tol = [
- 3.1e-3, # 1 : 0.0030000000000001137
- 0.0320, # 2 : 0.03190000000000026
- 0.0191, # 3 : 0.019000000000000128
- 0.0333, # 4 : 0.033200000000000784
- 0.0284, # 5 : 0.028399999999999537
- 0.0619, # 6 : 0.06189999999999962
- 0.0325, # 7 : 0.03240000000000265
- 0.0074, # 8 : 0.00730000000000075
- 0.0035, # 9 : 0.003400000000002734
- 0.0025, # 11: 0.002400000000001512
+ # pipe objects
+ list_pipes = [
+ StandardisedPipe(
+ pipe_tuple=pipe_tuple,
+ e_eff=pipe_e_eff, # override pipe absolute roughness
+ length=pipe_length, # override the pipe length
+ db=pipedb)
+ for pipe_tuple in list_pipe_tuples
]
- number_options = len(pipe_tuples)
- srps = SupplyReturnPipeSystem(
- fluid_db=fluid_db,
- phase=phase,
- pressure=[pressure for i in range(number_options)],
- supply_temperature=[
- supply_temperature for i in range(number_options)
- ],
- return_temperature=[
- return_temperature for i in range(number_options)
- ],
- supply_pipe=[
- pipes[pipe_tuple]
- for pipe_tuple in pipe_tuples
- ],
- max_specific_pressure_loss=[
- max_specific_pressure_loss for i in range(number_options)
- ]
+ number_options = len(list_pipes)
+ # two pipe system
+ two_pipe_system = SupplyReturnPipeSystem(
+ fluid_db=fluiddb,
+ phase=fluiddb.fluid_LIQUID,
+ pressure=[1e5 for i in range(number_options)],
+ supply_temperature=[dh_flow_temperature for i in range(number_options)],
+ return_temperature=[dh_return_temperature for i in range(number_options)],
+ max_specific_pressure_loss=[max_specific_pressure_loss for i in range(number_options)],
+ supply_pipe=list_pipes
)
-
- # simplified heat transfer surroundings
- sht = srps.simplified_heat_transfer_surroundings(
- length=[1 for i in range(number_options)],
- specific_heat_transfer_coefficient=u_coefficients,
- temperature_surroundings=temperature_surroundings,
- time_interval_duration=1
+ assert two_pipe_system.vector_mode
+ assert two_pipe_system.number_options() == len(list_pipes)
+
+ # vector mode, one u value per time interval and option, multiple temperatures
+ number_time_intervals = 3
+ u = [
+ [i+1+k for k in range(number_time_intervals)]
+ for i in range(len(list_pipe_tuples))
+ ]
+ t_surroundings = [ground_temperature+k for k in range(number_time_intervals)]
+ # q should be a list of lists
+ q = two_pipe_system.simplified_specific_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=t_surroundings,
)
-
- assert type(sht) == list
- assert len(sht) == number_options
- for _sht, sht_true, sht_tol in zip(
- sht,
- specific_heat_losses,
- specific_heat_losses_tol
- ):
- assert isclose(_sht, sht_true, abs_tol=sht_tol)
-
- sht = srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coefficients,
- temperature_surroundings=temperature_surroundings,
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == two_pipe_system.number_options()
+ for u_i, q_i in zip(u, q):
+ assert type(q_i) == list or type(q_i) == tuple
+ assert len(q_i) == number_time_intervals
+ for k in range(number_time_intervals):
+ assert math.isclose(
+ q_i[k],
+ u_i[k]*(dh_flow_temperature/2+dh_return_temperature/2-t_surroundings[k]),
+ abs_tol=1e-3
+ )
+ # use unit conversion
+ u_factor = 2
+ q = two_pipe_system.simplified_specific_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=t_surroundings,
+ unit_conversion_factor=u_factor
)
-
- assert type(sht) == list
- assert len(sht) == number_options
- for _sht, sht_true, sht_tol in zip(
- sht,
- specific_heat_losses,
- specific_heat_losses_tol
- ):
- assert isclose(_sht, sht_true, abs_tol=sht_tol)
-
- # simplified heat transfer surroundings (temporal vector mode)
- number_steps = 3
- sht = srps.simplified_heat_transfer_surroundings(
- length=[1 for i in range(number_options)],
- specific_heat_transfer_coefficient=u_coefficients,
- temperature_surroundings=[
- temperature_surroundings for i in range(number_steps)],
- time_interval_duration=[1 for i in range(number_steps)]
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == two_pipe_system.number_options()
+ for u_i, q_i in zip(u, q):
+ assert type(q_i) == list or type(q_i) == tuple
+ assert len(q_i) == number_time_intervals
+ for k in range(number_time_intervals):
+ assert math.isclose(
+ q_i[k],
+ u_i[k]*(dh_flow_temperature/2+dh_return_temperature/2-t_surroundings[k])*u_factor,
+ abs_tol=1e-3
+ )
+
+ # with length and time interval duration
+ time_interval_durations = [10+k for k in range(number_time_intervals)]
+ lengths = [3+i for i in range(two_pipe_system.number_options())]
+ q = two_pipe_system.simplified_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=t_surroundings,
+ time_interval_duration=time_interval_durations,
+ length=lengths
)
-
- assert type(sht) == list
- assert len(sht) == number_options
- for _sht, sht_true, sht_tol in zip(
- sht,
- specific_heat_losses,
- specific_heat_losses_tol
- ):
- assert type(_sht) == list
- assert len(_sht) == number_steps
- for __sht in _sht:
- assert isclose(__sht, sht_true, abs_tol=sht_tol)
-
- number_steps = 3
- sht = srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coefficients,
- temperature_surroundings=[
- temperature_surroundings for i in range(number_steps)]
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == two_pipe_system.number_options()
+ for u_i, q_i, l in zip(u, q, lengths):
+ assert type(q_i) == list or type(q_i) == tuple
+ assert len(q_i) == number_time_intervals
+ for k in range(number_time_intervals):
+ assert math.isclose(
+ q_i[k],
+ u_i[k]*(dh_flow_temperature/2+dh_return_temperature/2-t_surroundings[k])*l*time_interval_durations[k],
+ abs_tol=1e-3
+ )
+ # use unit conversion
+ q = two_pipe_system.simplified_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=t_surroundings,
+ time_interval_duration=time_interval_durations,
+ length=lengths,
+ unit_conversion_factor=u_factor
)
-
- assert type(sht) == list
- assert len(sht) == number_options
- for _sht, sht_true, sht_tol in zip(
- sht,
- specific_heat_losses,
- specific_heat_losses_tol
- ):
- assert type(_sht) == list
- assert len(_sht) == number_steps
- for __sht in _sht:
- assert isclose(__sht, sht_true, abs_tol=sht_tol)
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == two_pipe_system.number_options()
+ for u_i, q_i, l in zip(u, q, lengths):
+ assert type(q_i) == list or type(q_i) == tuple
+ assert len(q_i) == number_time_intervals
+ for k in range(number_time_intervals):
+ assert math.isclose(
+ q_i[k],
+ u_i[k]*(dh_flow_temperature/2+dh_return_temperature/2-t_surroundings[k])*l*time_interval_durations[k]*u_factor,
+ abs_tol=1e-3
+ )
+
+ # *************************************************************************
+ # *************************************************************************
+
+ # TODO: cover the main errors
+
+ def test_simplified_heat_transfer_errors_single_option_single_step(self):
- # try using incorrect option-based inputs
-
- error_raised = False
- try:
- srps.simplified_heat_transfer_surroundings(
- length=1,
- specific_heat_transfer_coefficient=u_coefficients[0],
- temperature_surroundings=temperature_surroundings,
- time_interval_duration=1
- )
- except TypeError:
- error_raised = True
- assert error_raised
-
- error_raised = False
- try:
- srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coefficients[0],
- temperature_surroundings=temperature_surroundings
- )
- except TypeError:
- error_raised = True
- assert error_raised
+ pass
- # *********************************************************************
+ def test_simplified_heat_transfer_errors_single_option_multi_step(self):
- # try other units
- ucf = 2
- # simplified heat transfer surroundings
- sht = srps.simplified_heat_transfer_surroundings(
- length=[1 for i in range(number_options)],
- specific_heat_transfer_coefficient=u_coefficients,
- temperature_surroundings=temperature_surroundings,
- time_interval_duration=1,
- unit_conversion_factor=ucf
- )
-
- assert type(sht) == list
- assert len(sht) == number_options
- for _sht, sht_true, sht_tol in zip(
- sht,
- specific_heat_losses,
- specific_heat_losses_tol
- ):
- assert isclose(_sht, sht_true*ucf, abs_tol=sht_tol*ucf)
-
- sht = srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coefficients,
- temperature_surroundings=temperature_surroundings,
- unit_conversion_factor=ucf
- )
-
- assert type(sht) == list
- assert len(sht) == number_options
- for _sht, sht_true, sht_tol in zip(
- sht,
- specific_heat_losses,
- specific_heat_losses_tol
- ):
- assert isclose(_sht, sht_true*ucf, abs_tol=sht_tol*ucf)
-
- # simplified heat transfer surroundings (temporal vector mode)
- number_steps = 3
- sht = srps.simplified_heat_transfer_surroundings(
- length=[1 for i in range(number_options)],
- specific_heat_transfer_coefficient=u_coefficients,
- temperature_surroundings=[
- temperature_surroundings for i in range(number_steps)],
- time_interval_duration=[1 for i in range(number_steps)],
- unit_conversion_factor=ucf
- )
-
- assert type(sht) == list
- assert len(sht) == number_options
- for _sht, sht_true, sht_tol in zip(
- sht,
- specific_heat_losses,
- specific_heat_losses_tol
- ):
- assert type(_sht) == list
- assert len(_sht) == number_steps
- for __sht in _sht:
- assert isclose(__sht, sht_true*ucf, abs_tol=sht_tol*ucf)
+ pass
- number_steps = 3
- sht = srps.simplified_specific_heat_transfer_surroundings(
- specific_heat_transfer_coefficient=u_coefficients,
- temperature_surroundings=[
- temperature_surroundings for i in range(number_steps)],
- unit_conversion_factor=ucf
- )
-
- assert type(sht) == list
- assert len(sht) == number_options
- for _sht, sht_true, sht_tol in zip(
- sht,
- specific_heat_losses,
- specific_heat_losses_tol
- ):
- assert type(_sht) == list
- assert len(_sht) == number_steps
- for __sht in _sht:
- assert isclose(__sht, sht_true*ucf, abs_tol=sht_tol*ucf)
+ def test_simplified_heat_transfer_errors_multi_option_single_step(self):
+
+ pass
+
+ def test_simplified_heat_transfer_errors_multi_option_multi_step(self):
+
+ pass
# *************************************************************************
# *************************************************************************
diff --git a/tests/test_trenches.py b/tests/test_trenches.py
index 2ce14ed34657a8bdd580c614f1519ec105368a7f..308cf95fa5a64513b1138c7af6157ffa3a410b6a 100644
--- a/tests/test_trenches.py
+++ b/tests/test_trenches.py
@@ -2710,7 +2710,7 @@ class TestPipeTrench:
# *************************************************************************
# *************************************************************************
- def test_simplified_heat_transfer_twin_pipes_single_option(self):
+ def test_simplified_heat_transfer_twin_pipes_single_option_single_step(self):
# maximum specific pressure drop
max_specific_pressure_loss = 80 # Pa/m
@@ -2808,6 +2808,76 @@ class TestPipeTrench:
u*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature)*length*time_interval_duration,
abs_tol=1e-3
)
+
+ # *************************************************************************
+ # *************************************************************************
+
+ def test_simplified_heat_transfer_twin_pipes_single_option_multi_step(self):
+
+ # maximum specific pressure drop
+ max_specific_pressure_loss = 80 # Pa/m
+
+ # district heating details
+ dh_flow_temperature = 273.15+70 # K
+ dh_return_temperature = 273.15+40 # K
+
+ # ground temperature
+ ground_temperature = 273.15+10 # K
+
+ # pipe absolute/effective roughness
+ pipe_e_eff = 0.01/1000 # m
+
+ # pipe length
+ pipe_length = 1000
+
+ # pipe depth
+ pipe_depth = 0.8
+
+ # pipe data
+ pipedata_files = [
+ 'tests/data/isoplus_twin_disconti_s1.csv',
+ # 'tests/data/isoplus_twin_disconti_s2.csv',
+ # 'tests/data/isoplus_twin_disconti_s3.csv',
+ ]
+
+ # pipe data
+ pipedb = StandardisedPipeDatabase(source=pipedata_files)
+
+ # fluid data
+ fluiddata_file = 'tests/data/incropera2006_saturated_water.csv'
+ fluiddb = fic.FluidDatabase(fluid='water', phase='l', source=fluiddata_file)
+
+ # *****************************************************************************
+ # *****************************************************************************
+
+ # pipe tuples
+ list_pipe_tuples = [
+ pipe_tuple
+ for pipe_tuple in pipedb.pipe_tuples
+ ]
+ # pipe objects
+ list_pipes = [
+ StandardisedTwinPipe(
+ pipe_tuple=pipe_tuple,
+ e_eff=pipe_e_eff, # override pipe absolute roughness
+ length=pipe_length, # override the pipe length
+ db=pipedb)
+ for pipe_tuple in list_pipe_tuples
+ ]
+
+ # single pipe trench
+ twin_trench = trenches.TwinPipeTrench(
+ pipe_center_depth=pipe_depth+list_pipes[0].d_cas/2,
+ fluid_db=fluiddb,
+ phase=fluiddb.fluid_LIQUID,
+ pressure=1e5,
+ supply_temperature=dh_flow_temperature,
+ return_temperature=dh_return_temperature,
+ max_specific_pressure_loss=max_specific_pressure_loss,
+ supply_pipe=list_pipes[0]
+ )
+ assert not twin_trench.vector_mode
+ assert twin_trench.number_options() == 1
# non-vector mode, one u value per time interval (and option), multiple temperatures
number_time_intervals = 3
@@ -2831,7 +2901,7 @@ class TestPipeTrench:
# *************************************************************************
# *************************************************************************
- def test_simplified_heat_transfer_twin_pipes(self):
+ def test_simplified_heat_transfer_twin_pipes_multi_option_single_step(self):
# maximum specific pressure drop
max_specific_pressure_loss = 80 # Pa/m
@@ -2914,6 +2984,91 @@ class TestPipeTrench:
abs_tol=1e-3
)
+ # with length and time interval duration
+ time_interval_duration = 10
+ lengths = [3+i for i in range(twin_trench.number_options())]
+ q = twin_trench.simplified_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=ground_temperature,
+ time_interval_duration=time_interval_duration,
+ length=lengths
+ )
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == twin_trench.number_options()
+ for u_i, q_i, l in zip(u, q, lengths):
+ assert math.isclose(
+ q_i,
+ u_i*(dh_flow_temperature/2+dh_return_temperature/2-ground_temperature)*l*time_interval_duration,
+ abs_tol=1e-3
+ )
+
+ # *************************************************************************
+ # *************************************************************************
+
+ def test_simplified_heat_transfer_twin_pipes_multi_option_multi_step(self):
+
+ # maximum specific pressure drop
+ max_specific_pressure_loss = 80 # Pa/m
+
+ # district heating details
+ dh_flow_temperature = 273.15+70 # K
+ dh_return_temperature = 273.15+40 # K
+
+ # ground temperature
+ ground_temperature = 273.15+10 # K
+
+ # pipe absolute/effective roughness
+ pipe_e_eff = 0.01/1000 # m
+
+ # pipe length
+ pipe_length = 1000
+
+ # pipe depth
+ pipe_depth = 0.8
+
+ # pipe data
+ pipedata_files = [
+ 'tests/data/isoplus_twin_disconti_s1.csv',
+ # 'tests/data/isoplus_twin_disconti_s2.csv',
+ # 'tests/data/isoplus_twin_disconti_s3.csv',
+ ]
+
+ # pipe data
+ pipedb = StandardisedPipeDatabase(source=pipedata_files)
+
+ # fluid data
+ fluiddata_file = 'tests/data/incropera2006_saturated_water.csv'
+ fluiddb = fic.FluidDatabase(fluid='water', phase='l', source=fluiddata_file)
+
+ # pipe tuples
+ list_pipe_tuples = [
+ pipe_tuple
+ for pipe_tuple in pipedb.pipe_tuples
+ ]
+ # pipe objects
+ list_pipes = [
+ StandardisedTwinPipe(
+ pipe_tuple=pipe_tuple,
+ e_eff=pipe_e_eff, # override pipe absolute roughness
+ length=pipe_length, # override the pipe length
+ db=pipedb)
+ for pipe_tuple in list_pipe_tuples
+ ]
+
+ # single pipe trench
+ twin_trench = trenches.TwinPipeTrench(
+ pipe_center_depth=[pipe_depth+pipe.d_cas/2 for pipe in list_pipes],
+ fluid_db=fluiddb,
+ phase=fluiddb.fluid_LIQUID,
+ pressure=[1e5 for i in range(len(list_pipes))],
+ supply_temperature=[dh_flow_temperature for i in range(len(list_pipes))],
+ return_temperature=[dh_return_temperature for i in range(len(list_pipes))],
+ max_specific_pressure_loss=[max_specific_pressure_loss for i in range(len(list_pipes))],
+ supply_pipe=list_pipes
+ )
+ assert twin_trench.vector_mode
+ assert twin_trench.number_options() == len(list_pipes)
+
# vector mode, one u value per time interval and option, multiple temperatures
number_time_intervals = 3
u = [
@@ -2937,6 +3092,27 @@ class TestPipeTrench:
u_i[k]*(dh_flow_temperature/2+dh_return_temperature/2-t_surroundings[k]),
abs_tol=1e-3
)
+
+ # with length and time interval duration
+ time_interval_durations = [10+k for k in range(number_time_intervals)]
+ lengths = [3+i for i in range(twin_trench.number_options())]
+ q = twin_trench.simplified_heat_transfer_surroundings(
+ specific_heat_transfer_coefficient=u,
+ temperature_surroundings=t_surroundings,
+ time_interval_duration=time_interval_durations,
+ length=lengths
+ )
+ assert type(q) == list or type(q) == tuple
+ assert len(q) == twin_trench.number_options()
+ for u_i, q_i, l in zip(u, q, lengths):
+ assert type(q_i) == list or type(q_i) == tuple
+ assert len(q_i) == number_time_intervals
+ for k in range(number_time_intervals):
+ assert math.isclose(
+ q_i[k],
+ u_i[k]*(dh_flow_temperature/2+dh_return_temperature/2-t_surroundings[k])*l*time_interval_durations[k],
+ abs_tol=1e-3
+ )
# *************************************************************************
# *************************************************************************