A Hydrostatic Pressure-Driven Desalination System for Large-Scale Deep Sea Space Station

Abstract

Compared with the common marine renewable energy sources like solar, wind, and wave energy, etc., the hydraulic pressure stored in the deep seawater can output stable and successive energy flow. Thus, it can be directly coupled with the reverse osmosis (RO) process to supply drinkable mineral water for crews of Deep Sea Space Station (DSSS). We proposed a novel submarine RO desalination system driven by the hydraulic pressure of deep seawater (SHP-RO), composed of a desalination branch to generate fresh water and a back pressure branch to ensure the depth independence of the desalination. The influences of the deep sea environment on the RO were analyzed, based on which the pretreatment of the seawater and the preparation of the drinkable mineral water were studied. The turbine-based energy recovery scheme was investigated in virtue of the CFD simulation on the flow behavior in the different turbine series. It was predicted that, when the DSSS was located at the depth of 1100 m and the operating pressure of the RO process was 6.0 MPa, for a drinkable water production rate of 240 m3/d, the recovered hydraulic pressure energy can achieve 39.22 kW·h, which was enough for driving electricity consumers in the SHP-RO system.

Polyoxometalate ionic liquid between graphene oxide surfaces as a new membrane in the desalination process: a molecular dynamics study

“…The least case is the zero exit cation [emim] from the 1IL-GO and 2IL-GO systems at 200 MPa and the most case is the exit of 3 cations from the 3IL-GO system at 200 and 250 MPa. Although the external pressures used in the real desalination apparatus are much less than those of these simulations (less than10 MPa 78 ) we should not worry about the exit of the ILs from the nanostructure; however, one of the solutions proposed here is the use of Keggin anions between the charged GO surfaces. To examine this idea, n [Keggin]-GO +3 n ( n = 1–4) systems were simulated in the desalination process at P = 150 MPa and 300 K and the corresponding water and ion fluxes are presented in Fig.…”

Development of Physics E-Module Based on Discovery Learning to Improve Students’ Scientific Literacy

“…This e-module explains about integration between hydrostatic pressure and infusion devices. Hydrostatic pressure is a pressure in a liquid that affected by density, gravity, and altitude (Cui et al, 2021). The concept formula hydrostatic that is emphasized with infusion is very related.…”