h2integrate.simulation.technologies.hydrogen.desal.desal_model

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h2integrate.simulation.technologies.hydrogen.desal.desal_model#

Python model of High-Pressure Reverse Osmosis Desalination (HPRO).

Reverse Osmosis (RO) is a membrane separation process. No heating or phase change is necessary. The majority of energy required is for pressurizing the feed water.

A typical RO system is made up of the following basic components: Pre-treatment: Removes suspended solids and microorganisms through sterilization, fine filtration

and adding chemicals to inhibit precipitation.

High-pressure pump: Supplies the pressure needed to enable the water to pass through the membrane

(pressure ranges from 54 to 80 bar for seawater).

Membrane Modules: Membrane assembly consists of a pressure vessel and the membrane. Either sprial

wound membranes or hollow fiber membranes are used.

Post-treatment: Consists of sterilization, stabilization, mineral enrichment and pH adjustment of

product water.

Energy recovery system: A system where a portion of the pressure energy of the brine is recovered.

Functions

RO_desal(net_power_supply_kW, ...[, ...])

Calculates the fresh water flow rate (m^3/hr) as a function of supplied power (kW) in RO desal.
h2integrate.simulation.technologies.hydrogen.desal.desal_model.RO_desal(net_power_supply_kW, desal_sys_size, useful_life, plant_life, water_recovery_ratio=0.3, energy_conversion_factor=4.2, high_pressure_pump_efficency=0.7, pump_pressure_kPa=5366, energy_recovery=0.4)#

Calculates the fresh water flow rate (m^3/hr) as a function of supplied power (kW) in RO desal. Calculates CAPEX (USD), OPEX (USD/yr), annual cash flows based on system's rated capacity (m^3/hr).

Parameters:

  • net_power_supply_kW (list) -- Hourly power input [kW].

  • desal_sys_size (float) -- Desired fresh water flow rate [m^3/hr].

  • useful_life (int) -- Useful life of desal system [years].

  • plant_life (int) -- Years of plant operation [years].

Assumed values:

Common set points from: https://www.sciencedirect.com/science/article/abs/pii/S0011916409008443 water_recovery_ratio (float): 0.30 energy_conversion_factor (float): 4.2 high_pressure_pump_efficency (float): 0.70 pump_pressure_kPa (float): 5366 (kept static for simplicity) energy_recovery (float): 0.40 Assumed energy savings by energy recovery device to be 40% of total energy https://www.sciencedirect.com/science/article/pii/S0360544210005578?casa_token=aEz_d_LiSgYAAAAA:88Xa6uHMTZee-djvJIF9KkhpuZmwZCLPHNiThmcwv9k9RC3H17JuSoRWI-l92rrTl_E3kO4oOA

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