Helper Methods for Electricity Demand

A number of methods are available for implementing common forms for calculating electricity intensity in zero-order type models. These helper functions are intended to be called after all necessary material and chemical flows have been added to the unit model.

Usage

from idaes.core import declare_process_block_class
from watertap.core import build_pt, constant_intensity, ZeroOrderBaseData

@declare_process_block_class("PumpZO")
class PumpZOData(ZeroOrderBaseData):

    CONFIG = ZeroOrderBaseData.CONFIG()

    def build(self):
        super().build()

        self._tech_type = "pump"

        build_pt(self)

        # Add variables and constraints for constant electricity intensity
        constant_intensity(self)

Module Documentation

zero_order_electricity.constant_intensity()

Helper method for implementing electricity demand assuming constant intensity based on the inlet volumetric flow rate.

E[t] = Q[t] * intensity

Two variables are added to the model:

• electricity (indexed by time)

• energy_electric_flow_vol_inlet (unindexed)

One constraint is added to the model:

• electricity_consumption (indexed by time)