Energy recovery

In this paper, a seawater reverse osmosis desalination plant with various energy recovery systems is studied using exergy analysis. These energy recovery devices include turbines and pressure exchangers as well as infinite area based single and two-stage pressure retarded osmosis units. The appropria

An integration of water vane pump and hydraulic vane motor was introduced in small reverse osmosis (RO) system, in which the hydraulic vane motor was used as energy recovery device. The hydraulic performance and energy consumption of one combination of pump and hydraulic motor were investigated unde

Pressure driven membrane processes are characterized by their low specific energy consumption. Since they constitute a mechanical separation without phase or temperature change, they are least energy intensive. This study focused on further energy reduction. Process industries (chemical, food, mecha

Photovoltaic powered brackish water reverse osmosis (PV-BWRO) desalination systems have been proved to be a technically and economically mature choice for water supply in isolated communities and islands suffering from lack or poor water quality. However, photovoltaic seawater reverse osmosis (PV-SW

The potential for an autonomous wave-powered desalination system is considered and it is identified that the most promising configuration is a reverse osmosis (RO) plant utilising a pressure exchanger-intensifier for energy recovery. A numerical model of the RO plant with a pressure exchanger-intens

Energy Recovery, Inc.’s Big Rotor Pressure Exchanger is the result of over 100 years of technology development. Work exchanger devices developed for seawater RO plants are considered by many to be the most important breakthrough in desalination in the last 10 years. What has made this breakthrough p

The development of small-scale stand-alone desalination systems is important to communities on islands and in isolated inland areas. In such places, electricity supplies are often expensive and unreliable, while the wind resource is abundant. The system presented here comprises a 2.2 kW wind turbine

A small-scale seawater reverse-osmosis system with excellent energy efficiency is presented. The system promises to deliver up to 460 l/h of potable water, from seawater (at 40,000 ppm), while consuming less than 1600 W of electrical power. This represents a specific energy consumption of less than

A new pressure exchanger (PX) device transfers the energy from the concentrate stream directly to the feed stream. This direct, positive displacement approach results in a net transfer efficiency of over 95%. This efficiency advantage makes it possible to dramatically improve the performance of exis

Many communities in arid regions have both waste disposal and water shortage problems suggesting the use of the thermal energy inherent in municipal waste to desalinate sea and brackish waters. The technology requires to be demonstrated in an appropriate pilot study effected on a complex having the