The present invention relates to a distributed energy source system utilizing waste heat deeply. The distributed energy source system utilizing waste heat deeply comprises a primary waste heat recycling module, a membrane distillation type seawater desalination module and a membrane type thermoosmosis power generation module. The distributed energy source system utilizing waste heat deeply provided by the present invention can recycle and deeply utilize waste heat and moisture in flue gas by means of the primary waste heat recycling module, the membrane distillation type seawater desalination module and the membrane type thermoosmosis power generation module to realize functions of seawater desalination and low-temperature power generation, has high energy utilization ratio and improves the waste heat utilization efficiency.

Systems and processes for purifying and concentrating a liquid feed stream are disclosed. In the systems, the concentrated liquid output from the high pressure side of a reverse osmosis stage is used as the draw solution in the low pressure side of the reverse osmosis stage in a configuration called osmotically assisted reverse osmosis. This reduces the osmotic pressure differential across the membrane, permitting high solute concentrations to be obtained, hastening the purification of the liquid. Reduced system pressures are also obtained by arranging multiple osmotically assisted reverse osmosis stages in a cross-current arrangement. Overall system energy consumption is reduced compared to conventional thermal processes for high concentration streams.

Systems and processes for purifying and concentrating a liquid feed stream are disclosed. In the systems, the concentrated liquid output from the high pressure side of a reverse osmosis stage is used as the draw solution in the low pressure side of the reverse osmosis stage in a configuration called osmotically assisted reverse osmosis. This reduces the osmotic pressure differential across the membrane, permitting high solute concentrations to be obtained, hastening the purification of the liquid. Reduced system pressures are also obtained by arranging multiple osmotically assisted reverse osmosis stages in a cross-current arrangement. Overall system energy consumption is reduced compared to conventional thermal processes for high concentration streams.

A process for solution mining of minerals is disclosed. The process comprises injecting an unsaturated stream (150) at an injection pressure into a mineral formation (130) to dissolve the mineral and extracting a high concentration stream (110) containing said dissolved mineral. The process comprising converting latent osmotic energy present in said high concentration stream into an increase in the total pressure of said stream by passage through an osmotic power unit (200) and generating electricity and reducing to the injection pressure the total pressure of a reduced concentration output stream (150) by passage through a power generating device (250) and using the reduced concentration output stream (150) at the injection pressure as the unsaturated stream (150). A process for storing a fuel in an underground formation is also disclosed.

The present invention relates to shallow water subsea desalination system with a subsea desalination template (20) located on a seabed. A retrievable subsea RO-module (4) is located in a subsea RO-module zone (23) of the subsea desalination template (20) and is connected to a RO-module connection. A seawater booster pump assembly (1) includes a seawater inlet (7) and an outlet in fluid connection with a seawater inlet side of the RO-cartridge assembly. A retrievable subsea booster module (2) includes the seawater booster pump assembly (1). A pressure regulator (11) is in fluid connection with a retentate side of the least one retrievable subsea RO-module (4).

A turbine and method of operating the same a turbine includes a housing having a volute, an inlet and an outlet an impeller rotatable coupled to the housing, a first shroud disposed within the housing comprising a plurality of nozzle vanes and a second shroud disposed within the housing adjacent to the first shroud so that a nozzle area is formed between the first shroud and the second shroud, said nozzle area having a variable width. The second shroud is movable relative to the first shroud to vary the width so that fluid flow from the inlet to the outlet is variable.

A turbine and method of operating the same a turbine includes a housing having a volute, an inlet and an outlet an impeller rotatable coupled to the housing, a first shroud disposed within the housing comprising a plurality of nozzle vanes and a second shroud disposed within the housing adjacent to the first shroud so that a nozzle area is formed between the first shroud and the second shroud, said nozzle area having a variable width. The second shroud is movable relative to the first shroud to vary the width so that fluid flow from the inlet to the outlet is variable.

A system exchanges pressure and heat from a source stream to a sink stream. The system includes a source exchanger and a sink exchanger. The source exchanger includes a first pressure exchanger and a first heat exchanger. The first pressure exchanger converts pressure of the source stream to electrical energy. The first heat exchanger converts temperature from the source stream via a first temperature differential to electrical energy. The sink exchanger includes a second pressure exchanger and a second heat exchanger. The second pressure exchanger uses electrical energy received from the source exchanger to change a pressure of the sink stream. The second heat exchanger uses electrical energy received from the source exchanger to change a temperature of the sink stream. Related apparatus, systems, techniques, and articles are also described.

An object of the present invention is to provide a desalination apparatus in which a high pressure pump can be operated at a high efficient operation point even when temperature, salt concentration or the like of water to be treated vary. The desalination apparatus includes a high pressure pump which is provided in a first flow path and supplies raw water to a first module at high pressure to apply reverse osmotic pressure to a first module and a second module, a third flow path for supplying second concentrated water after separation in the second module to upstream of the high pressure pump in the first flow path, and a fourth flow path for supplying a portion of the first concentrated water after separation in the first module to upstream of the high pressure pump in the first flow path.

To provide a filter medium, a process for producing filter medium, a filtration device, a method for operating the filtration device, and a filtration system, which are capable of promptly regenerating the adsorption power by backwashing and realizing efficient operation of a filtration device. The filter medium of the present invention contains a carbon-based material in which a cumulative pore volume of pores having a pore radius of 2 nm or less is 25% or less with respect to a cumulative pore volume of pores having a pore radius of 50 nm or less.