"""
System Modeling: Cooling tower
"""
from __future__ import division
__author__ = "Thuy-An Nguyen"
__copyright__ = "Copyright 2015, Architecture and Building Systems - ETH Zurich"
__credits__ = ["Thuy-An Nguyen", "Tim Vollrath", "Jimeno A. Fonseca"]
__license__ = "MIT"
__version__ = "0.1"
__maintainer__ = "Daren Thomas"
__email__ = "cea@arch.ethz.ch"
__status__ = "Production"
# technical model
[docs]def calc_CT(qhotdot, Qdesign, gV):
"""
For the operation of a water condenser + direct cooling tower based on [B. Stephane, 2012]_
:type qhotdot : float
:param qhotdot: heating power to condenser, From Model_VCC
:type Qdesign : float
:param Qdesign: Max cooling power
:type wdot : float
:param wdot: electric power needed for the variable speed drive fan
..[B. Stephane, 2012] B. Stephane (2012), Evidence-Based Model Calibration for Efficient Building Energy Services.
PhD Thesis, University de Liege, Belgium
"""
if qhotdot < gV.CT_maxSize:
print "Error in CT model, over the max capacity"
qpartload = qhotdot / Qdesign
wdesign_fan = 0.011 * Qdesign
wpartload = 0.8603 * qpartload ** 3 + 0.2045 * qpartload ** 2 - 0.0623 * \
qpartload + 0.0026
wdot = wpartload * wdesign_fan
return wdot
# Investment costs
[docs]def calc_Cinv_CT(CT_size, gV):
"""
Annualized investment costs for the Combined cycle
:type CT_size : float
:param CT_size: Size of the Cooling tower in [W]
:rtype InvCa : float
:returns InvCa: annualized investment costs in Dollars
"""
if CT_size > 0:
InvC = (0.0161 * CT_size * 1E-3 + 1457.3) * 1E3
InvCa = InvC * gV.CT_a
else:
InvCa = 0
return InvCa