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water_usage_variables

Module containing global variables relating to the water usage

References

https://www.usgs.gov/special-topic/water-science-school/science/water-density https://www.thermal-engineering.org/what-is-latent-heat-of-vaporization-definition/

airtemp = None module-attribute

ambient air temperature (degrees Celsius)

watertemp = None module-attribute

water temperature (degrees Celsius)

windspeed = None module-attribute

wind speed (m/s)

waterdens = None module-attribute

density of water (kg/m3) for simplicity, set to static value applicable to water at 21 degC

latentheat = None module-attribute

latent heat of vaporization (J/kg) for simplicity, set to static value applicable at 1 atm (100 kPa) air pressure

volheat = None module-attribute

volumetric heat of vaporization (J/m3)

evapratio = None module-attribute

evaporation ratio: ratio of the heat used to evaporate water to the total heat discharged through the tower

evapvol = None module-attribute

evaporated volume of water (m3)

energypervol = None module-attribute

input waste (heat) energy cooled per evaporated volume (J/m3)

volperenergy = None module-attribute

volume evaporated by units of heat energy (m3/MJ)

waterusetower = None module-attribute

total volume of water used in cooling tower (m3)

wateruserecirc = None module-attribute

total volume of water used in recirculating system (m3)

wateruseonethru = None module-attribute

total volume of water used in once-through system (m3)

init_watuse_variables()

Initialise water variables

Source code in process/data_structure/water_usage_variables.py 
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def init_watuse_variables():
    """Initialise water variables"""
    global \
        airtemp, \
        watertemp, \
        windspeed, \
        waterdens, \
        latentheat, \
        volheat, \
        evapratio, \
        evapvol, \
        energypervol, \
        volperenergy, \
        waterusetower, \
        wateruserecirc, \
        wateruseonethru

    airtemp = 15.0
    watertemp = 5.0
    windspeed = 4.0
    waterdens = 998.02
    latentheat = 2257000.0
    volheat = 0.0
    evapratio = 0.0
    evapvol = 0.0
    energypervol = 0.0
    volperenergy = 0.0
    waterusetower = 0.0
    wateruserecirc = 0.0
    wateruseonethru = 0.0