ProcessWaterCenter

class ProcessWaterCenter(ID='', ins=None, outs=(), thermo=None, **kwargs)

Create a ProcessWaterCenter object that takes care of balancing the amount of make-up process and reverse osmosis (RO) -grade water required for the process. The capital cost and power are based on the flow rate of process and make-up water as given in[1]_.

Parameters:

• ins (Sequence[AbstractStream], optional) –

  [0] Recycled RO-grade water.

  [1] Make-up RO-grade water.

  [2] Recycled process water.

  [3] Make-up process water.

• outs (Sequence[AbstractStream], optional) –

  [0] RO-grade water.

  [1] Process water.

  [2] Excess water.

• makeup_water_streams (List[Stream], optional) – All inlet RO-grade water streams. Defaults to boiler and cooling tower make-up water streams at run time.

• process_water_streams (List[Stream], optional) – All inlet process water streams (excluding makeup water streams). Defaults to all fresh process water streams within the system at run time.

• reverse_osmosis_water_price (float, optional) – Defaults to 5.6e-4 USD/kg.

• process_water_price (float, optional) – Defaults to 2.7e-4 USD/kg.

Notes

Default prices for the RO-grade and process water are 0.56 and 0.27 USD/m3 as given in Table 17.1 of [2].

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

[2]

Seider, W. D., Lewin, D. R., Seader, J. D., Widagdo, S., Gani, R., & Ng, M. K. (2017). Product and Process Design Principles. Wiley. Cost Accounting and Capital Cost Estimation (Chapter 16)

property reverse_osmosis_water_price

[Float] Price of reverse osmosis-grade water, same as bst.stream_utility_prices[‘Reverse osmosis water’].

property process_water_price

[Float] Price of process water, same as bst.stream_utility_prices[‘Process water’].

line: str = 'Process water center'

class-attribute Name denoting the type of Unit class. Defaults to the class name of the first child class

run()

Run mass and energy balance. This method also runs specifications user defined specifications unless it is being run within a specification (to avoid infinite loops).

See also

_run, specifications, add_specification, add_bounded_numerical_specification