A horizontal self-balancing supercritical reaction apparatus, comprising a pressure vessel, a high pressure air compression apparatus, and at least one reactor arranged within the pressure vessel. The reactor is internally provided with front and rear pistons, two ends of the reactor are sealed by the reactor front piston and the reactor rear piston, a pressure medium is filled between the reactor front piston and an inner wall of the pressure vessel, the reactor rear piston is connected to a rear piston driving motor by a rear piston push rod, the reactor is provided with a water inlet and a water/air outlet which are controlled by valves, the reactor is internally provided with a heating apparatus, and the high pressure air compression apparatus is connected to the inside of the reactor. The present invention utilises a pressure self-balancing system, which significantly improves the stress characteristics of the reactor.

At least one pressure exchange unit with a hollow cylindrical body, a piston sliding in the body, the piston including a piston head separating the interior of the cylindrical body into a downstream chamber and an upstream chamber, the downstream chamber being provided with a device for the admission and discharge of water to be treated, the upstream chamber being provided with a five-way distributor linkage including, for hydraulic balancing, two pressurized liquid supply orifices, two orifices for the evacuation of the liquid and an opening in communication with the upstream chamber.

A system for water desalination and power generation. The system includes a power generation section and a desalination section. The power generation section includes a first tank, a second tank, and a first channel. The desalination section includes a third tank, a fourth tank, and a second channel. The system utilizes waste energy in power plants to desalinate water and generate power. The disclosed system is able to improve the performance of power plants, by utilizing the wasted power of the exit steam, to desalinate seawater and even generate electricity. The disclosed system alleviates requirements for cooling towers and introduces thermal exchange tanks, radiators, and sprinkles instead of cooling towers.

A system for generating potable water from source water contains an enclosed vessel, a heating unit, an air distributor, a condenser, and a collection vessel. A method for generating potable water from source water includes heating ambient air, bubbling heated air through source water producing saturated air, cooling the saturated air producing potable water, and collecting the potable water. A method of removing contaminants from ambient air includes heating ambient air, bubbling the heated air through source water to produce treated air and contaminant rich water, discharging the treated air, and discharging the contaminant rich water.

Flowing a first buffer fluid and a second buffer fluid through a heat exchanger network thermally coupled to heat sources of a Natural Gas Liquid (NGL) fractionation plant, and transferring heat from the heat sources to the first buffer fluid and the second buffer fluid. Generating power via a first sub-system thermally coupled to the heat exchanger network and generating potable water from brackish water via a second sub-system thermally coupled to the heat exchanger network.

Various embodiments may include a system for removing contaminants from contaminated water comprising: a distillation still supplying heat to contaminated water to boil the contaminated water; a vent allowing a vapor stream to exit the distillation still; an oxidation unit removing additional contaminants from the vapor stream; an outlet discharging a purified water stream from the oxidation unit; and a heat exchanger transferring heat from the purified water stream leaving the oxidation unit to the vapor stream exiting the distillation still before the vapor stream enters the oxidation unit.

The present application discloses a device for multistage continuous preparation of deuterium depleted water, which includes a feeding pump, a plurality of stages of separation systems connected in series, and a receiver, all of which are connected in sequence. Each stage of separation system comprises a distillation column, a vapor-liquid separator, a low-pressure steam compressor, a stream delivery pump, a three-way valve, and a stream output pipe. The present application further discloses a method for preparing deuterium depleted water, wherein natural water is fed into the device of the present disclosure, and the liquid phase stream continuously flows backwards stage by stage under the combined action of the low-pressure steam compressors and the stream delivery pumps. In a single-stage system, the deuterium is deprived depending on the difference in vapor pressure between .sup.1H.sub.2O and .sup.2H.sub.2O (and/or .sup.1H.sup.2HO), and finally, the deuterium depleted water is produced.

A system for processing wastewater includes a wastewater source, a biomass burner, and a first heat exchanger. The biomass burner is configured to receive biomass from a biomass source, combust the biomass to produce heat and ash, receive a thermal transfer fluid, and heat the thermal transfer fluid using the heat produced from the combustion of the biomass. The first heat exchanger is configured to heat the wastewater to produce steam. The first heat exchanger includes a first inlet, a second inlet, a first outlet, a second outlet, and a third outlet. The first inlet is configured to receive the wastewater from the wastewater source. The second inlet is configured to receive the thermal transfer fluid from the biomass burner. The first outlet is configured to discharge the steam. The second outlet is configured to discharge the thermal transfer fluid.

A microscale energy cogeneration system comprising at least one micro/nano-turbine for converting fuel into mechanical energy and a generator for converting mechanical energy produced by the micro/nano-turbine into electrical energy in the range of 1 to 5 kWh. Compressed air passes through a cold side of a heat exchanger. The compressed cold air and fuel delivered to a combustion chamber drives the turbine. At least one heat exchanger receives high temperature exhaust gas from an exhaust passage downstream from the micro/nano-turbine for heat transfer. The heat exchanger can be used to heat water and/or air of a house. A water heating system can be coupled to the heat exchanger for converting tap water into potable hot water and/or converting cool air into hot air. The portable micro/nano-turbine set can be scaled up by interconnecting several units to a network for balancing out the energy demand of multiple users.

Among other things, a device for use in electrolyzing water is described. The device comprises an electrolysis unit that includes a chamber, an ion exchange structure in the chamber, a cathode, an anode, a high pressure chamber, and a reservoir. The chamber is separated by the ion exchange structure into a first compartment and a second compartment. The cathode is in the first compartment and the anode in the second compartment. The reservoir is disposed in the high pressure chamber for storing water to be supplied to the chamber of the electrolysis unit. In some implementations, the ion exchange structure is a proton exchange membrane.