Source code for biosteam.facilities._chilled_water_package
# -*- coding: utf-8 -*-
# BioSTEAM: The Biorefinery Simulation and Techno-Economic Analysis Modules
# Copyright (C) 2020-2023, Yoel Cortes-Pena <yoelcortes@gmail.com>
#
# This module is under the UIUC open-source license. See
# github.com/BioSTEAMDevelopmentGroup/biosteam/blob/master/LICENSE.txt
# for license details.
"""
"""
import biosteam as bst
import numpy as np
cost = bst.decorators.cost
__all__ = ('ChilledWaterPackage',)
[docs]
@cost('Duty', S=-14*4184000, kW=3400*0.7457, cost=1375e3, CE=551, n=0.7, BM=1.5)
class ChilledWaterPackage(bst.Facility):
"""
Create a chilled water package with capital cost and power based on the flow rate
of chilled water as in [1]_.
Parameters
----------
ID : str, optional
Unit ID.
References
----------
.. [1] Humbird, D., Davis, R., Tao, L., Kinchin, C., Hsu, D., Aden, A.,
Dudgeon, D. (2011). Process Design and Economics for Biochemical
Conversion of Lignocellulosic Biomass to Ethanol: Dilute-Acid
Pretreatment and Enzymatic Hydrolysis of Corn Stover
(No. NREL/TP-5100-47764, 1013269). https://doi.org/10.2172/1013269
"""
ticket_name = 'CWP'
network_priority = -1
_units = {'Duty': 'kJ/hr'}
def __init__(self, ID='', agent=None):
self.agent = chilled_water = agent or bst.settings.get_cooling_agent('chilled_water')
super().__init__(ID,
ins='.recirculated_chilled_water',
outs=chilled_water.to_stream(),
thermo=chilled_water.thermo)
def _load_chilled_water_utilities(self):
self.chilled_water_utilities = cwu = set()
ID = self.agent.ID
for u in self.other_units:
if u is self: continue
for hu in u.heat_utilities:
agent = hu.agent
if agent and agent.ID == ID: cwu.add(hu)
def _design(self):
self._load_chilled_water_utilities()
cwu = self.chilled_water_utilities
self.design_results['Duty'] = duty = sum([i.duty for i in cwu])
hu_chilled = self.create_heat_utility()
hu_chilled.mix_from(cwu)
hu_chilled.reverse()
self.add_heat_utility(duty, 330) # Cooling water
used = self.ins[0]
used.mol[0] = sum([i.flow for i in cwu])
Ts = [i.outlet_utility_stream.T for i in cwu]
if Ts: used.T = np.array(Ts).mean()
