# coding=utf-8
"""Volume Flow Rate Intensity data type."""
from __future__ import division
from .base import DataTypeBase
[docs]class VolumeFlowRateIntensity(DataTypeBase):
"""Volume Flow Rate Intensity
"""
_units = ('m3/s-m2', 'ft3/s-ft2', 'L/s-m2', 'cfm/ft2', 'L/h-m2', 'gph/ft2')
_si_units = ('m3/s-m2', 'L/s-m2', 'L/h-m2')
_ip_units = ('ft3/s-ft2', 'cfm/ft2', 'gph/ft2')
_min = 0
_abbreviation = 'dV/dt-A'
def _m3_sm2_to_ft3_sft2(self, value):
return value * 3.28084
def _m3_sm2_to_L_sm2(self, value):
return value * 1000.
def _m3_sm2_to_cfm_ft2(self, value):
return value * 196.85
def _m3_sm2_to_L_hm2(self, value):
return value * 3600000.
def _m3_sm2_to_gph_ft2(self, value):
return value * 88352.5923
def _ft3_sft2_to_m3_sm2(self, value):
return value / 3.28084
def _L_sm2_to_m3_sm2(self, value):
return value / 1000.
def _cfm_ft2_to_m3_sm2(self, value):
return value / 196.85
def _L_hm2_to_m3_sm2(self, value):
return value / 3600000.
def _gph_ft2_to_m3_sm2(self, value):
return value / 88352.5923
[docs] def to_unit(self, values, unit, from_unit):
"""Return values converted to the unit given the input from_unit."""
return self._to_unit_base('m3/s-m2', values, unit, from_unit)
[docs] def to_ip(self, values, from_unit):
"""Return values in IP and the units to which the values have been converted."""
if from_unit in self.ip_units:
return values, from_unit
elif from_unit == 'L/s-m2':
return self.to_unit(values, 'cfm/ft2', from_unit), 'cfm/ft2'
elif from_unit == 'L/h-m2':
return self.to_unit(values, 'gph/ft2', from_unit), 'gph/ft2'
else:
return self.to_unit(values, 'ft3/s-ft2', from_unit), 'ft3/s-ft2'
[docs] def to_si(self, values, from_unit):
"""Return values in SI and the units to which the values have been converted."""
if from_unit in self.si_units:
return values, from_unit
elif from_unit == 'cfm/ft2':
return self.to_unit(values, 'L/s-m2', from_unit), 'L/s-m2'
elif from_unit == 'gph/ft2':
return self.to_unit(values, 'L/h-m2', from_unit), 'L/h-m2'
else:
return self.to_unit(values, 'm3/s-m2', from_unit), 'm3/s-m2'