scholarly journals Continuous Cycle of Water Desalination Utilizing Hydrogel as Draw Agent.

2021 ◽  
Author(s):  
Alexander Fayer
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Low Power ◽  
Reverse Osmosis ◽  
Fresh Water ◽  
Duty Cycle ◽  
Water Desalination ◽  
Low Power Consumption ◽  
Seawater Desalination ◽  
Specific System

This document discusses operation of desalination system permanently extracting water from hydrogel draw agent by specially selected wicks. Due to its peculiarity the system combines advantages of both forward and reverse osmosis approaches such as, low power consumption, passive process of a freshwater extraction, continuous duty cycle and scaling possibility. While in modern systems an energy consumption of seawater desalination reaches of about 3 kWh/m 3, including pre-filtering and ancillaries [1], the same parameter for the specific system expected to be as low as for local fresh water supplyi.e., 0.2 kWh/m 3

scholarly journals Analyzing the Energy Consumption, GHG Emission, and Cost of Seawater Desalination in China

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 463 ◽  
Author(s):  
Xuexiu Jia ◽  
Jiří Klemeš ◽  
Petar Varbanov ◽  
Sharifah Wan Alwi
Keyword(s):  
Energy Consumption ◽  
Water Supply ◽  
Reverse Osmosis ◽  
Process Integration ◽  
Ghg Emissions ◽  
Water Desalination ◽  
Heat Integration ◽  
Seawater Desalination ◽  
Ghg Emission ◽  
Product Cost

Seawater desalination is considered a technique with high water supply potential and has become an emerging alternative for freshwater supply in China. The increase of the capacity also increases energy consumption and greenhouse gases (GHG) emissions, which has not been well investigated in studies. This study has analyzed the current development of seawater desalination in China, including the capacity, distribution, processes, as well as the desalted water use. Energy consumption and GHG emissions of overall desalination in China, as well as for the provinces, are calculated covering the period of 2006–2016. The unit product cost of seawater desalination plants specifying processes is also estimated. The results showed that 1) The installed capacity maintained increased from 2006 to 2016, and reverse osmosis is the major process used for seawater desalination in China. 2) The energy consumption increased from 81 MWh/y to 1,561 MWh/y during the 11 years. The overall GHG emission increase from 85 Mt CO2eq/y to 1,628 Mt CO2eq/y. Tianjin had the largest GHG emissions, following are Hebei and Shandong, with emissions of 4.1 Mt CO2eq/y, 2.2 Mt CO2eq/y. and 1.0 Mt CO2eq/y. 3) The unit product cost of seawater desalination is higher than other water supply alternatives, and it differentiates the desalination processes. The average unit product cost of the reverse osmosis process is 0.96 USD and 2.5 USD for the multiple-effect distillation process. The potential for future works should specify different energy forms, e.g. heat and power. Alternatives of process integration should be investigated—e.g. efficiency of using the energy, heat integration, and renewables in water desalination, as well as the utilization of total site heat integration.

scholarly journals Rede de Sensores Sem Fio para Monitoramento de Variáveis de Ambiente

2020 ◽  
Author(s):  
Lucas José da Cunha ◽  
Paulo Roberto Oliveira Valim
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Low Power ◽  
Long Range ◽  
Low Energy ◽  
Low Power Consumption ◽  
Low Energy Consumption

This research has the objective of implementing a sensors networkfor monitoring variable of environments using an IoT(Internet ofThings) technology focused on low energy consumption and longrange. The idea is to implement this network using LoRa technologyand LoRaWaN protocol. For a better utilization, it will be used andtested different LoRa parameters to communicate the nodes aimingshow the impacts of these parameters changes in long range, withconsistent data and low power consumption.

Acceleration Components in Heterogeneous Supercomputers

2011 ◽  
Vol 204-210 ◽  
pp. 765-768
Author(s):  
Xian Min Wei
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Low Power ◽  
Control Unit ◽  
General Purpose ◽  
Low Power Consumption ◽  
Computing Power ◽  
General Purpose Processor ◽  
Computing Performance ◽  
Good Expansion

General-purpose processors continue to improve computing performance, but its energy consumption has far exceeded the increase in the proportion of performance. Specifically designed for the special purpose processor in the case of relatively low power consumption, can provide better performance. The general-purpose processor as the main control unit, special purpose processors as accelerators consisting of heterogeneous supercomputers will become a trend in supercomputer development. This paper introduces and analyzes several heterogeneous supercomputers used to build the acceleration components.While accelerate parts based on such components have obvious calculation advantages (high computing power, low power consumption), but with less application and difficult programming bottlenecks still exist. After all, the application number is limited which using hundreds, thousands or even more parallel computing for good expansion performance, and the workload of migration, development and optimization remains high.

scholarly journals Low Power Consumption Mobile Ad Hoc Network System

1970 ◽  
Vol 5 (1) ◽  
pp. 9-14
Author(s):  
Hiroshi Ishii
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Low Power ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Data Driven ◽  
Low Power Consumption ◽  
Ultra Low Power ◽  
Mobile Ad Hoc

In order to solve the environmental crisis problem and to realize the sustainable environment, we need the efforts to reduce energy consumption. It is reported that the energy consumption by IT including communication will rapidly grow. Based on this situation, Japan Science and Technology Agency (JST) has begun the project of “Ultra low power consumption information technology” under the umbrella of the competitive research fund named “Core Research for Evolutional Science and Technology (CREST)”. We have applied to the open call for proposal and our proposal “Ultra low power Data Driven Networking System (ULPDDNS)” has been accepted as one of 2007-2012 frame projects by JST CREST. Our objective is to develop a data-driven networking system that can achieve reduction of power consumption to 1/100-1/1000 compared with the existing systems, especially in the situation just after a disaster happened. We believe the most applicable network to disaster situation is Mobile Ad hoc NETwork (MANET). This paper introduces the ULPDDNS research activities mainly from the viewpoint of network, i.e., MANET and shows three techniques to establish highly efficient and energy saving MANETswith reasonable performance: (1) GPS-aided target information discovery, (2) Load-aware broadcast-type contents delivery, and (3) Trust relationship list based key management.

scholarly journals Reverse Osmosis Desalination Plants Energy Consumption Management and Optimization for Improving Power Systems Voltage Stability with PV Generation Resources

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7739
Author(s):  
Zeyad A. Haidar ◽  
Mamdooh Al-Saud ◽  
Jamel Orfi ◽  
Hany Al-Ansary
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Power Systems ◽  
Reverse Osmosis ◽  
Fresh Water ◽  
Voltage Stability ◽  
Total Power ◽  
Variable Load ◽  
Management Algorithm ◽  
Desalination Plants

This paper studies energy consumption management of seawater Reverse Osmosis (RO) desalination plants to maintain and enhance the Voltage Stability (VS) of Power Systems (PS) with Photovoltaic (PV) plant integration. We proposed a voltage-based management algorithm to determine the maximum power consumption for RO plants. The algorithm uses power flow study to determine the RO plant power consumption allowed within the voltage-permissible limits, considering the RO process constraints in order to maintain the desired fresh water supply. Three cases were studied for the proposed RO plant: typical operation with constant power consumption, controlled operation using ON/OFF scheduling of the High-Pressure Pumps (HPPs) and controlled operation using Variable Frequency Drive (VFD) control. A modified IEEE 30-bus system with a variable load was used as a case study with integration of three PV plants of 75 MWp total power capacity. The adopted 33.33 MW RO plant has a maximum capacity of 200,000 m3/day of fresh water production. The results reveal that while typical operation of RO plants can lead to voltage violation, applying the proposed load management algorithm can maintain the vs. of the PS. The total transmission power loss and power lines loading were also reduced. However, the study shows that applying VFD control is better than using ON/OFF control because the latter involves frequent starting up/shutting down the RO trains, which consequently requires flushing and cleaning procedures. Moreover, the specific energy consumption (SEC) and RO plant recover ratio decreases proportionally to the VFD output. Furthermore, the power consumption of the RO plant was optimized using the PSO technique to avoid unnecessary restriction of RO plant operation and water shortage likelihood.

The near-future integration of microbial desalination cells with reverse osmosis technology

2014 ◽  
Vol 7 (12) ◽  
pp. 3921-3933 ◽  
Author(s):  
Ahmed ElMekawy ◽  
Hanaa M. Hegab ◽  
Deepak Pant
Keyword(s):  
Energy Consumption ◽  
Reverse Osmosis ◽  
Fresh Water ◽  
Water Shortage ◽  
Water Desalination ◽  
Energy Depletion ◽  
Negative Effect ◽  
Near Future

The combined negative effect of both fresh water shortage and energy depletion has encouraged the research to move forward to explore effective solutions for water desalination with less energy consumption.

scholarly journals Design and Development of IOT based Low Power Consumption in Employee Meeting Rooms

2020 ◽  
Author(s):  
Ammar Yasir Hamood Al Rawahi ◽  
Shaik Mazhar Hussain ◽  
Anilloy Frank
Keyword(s):  
Energy Consumption ◽  
Comparative Analysis ◽  
Power Consumption ◽  
Power System ◽  
Low Power ◽  
Low Power Consumption ◽  
Central Processor ◽  
Design And Development ◽  
Low Power System ◽  
Relay Device

In this paper, We design and implement IOT based low power system that can be used in employee meeting rooms. The design is based on number of employees entering and leaving the room and automates room AC, lights and room freshners using relay device. The system designed counts number of employees entering the room using IR device and updates the number using counter and automates electrical appliances of the room and when leaving automatically switches off the devices. The power consumed is updated using ESP 8266 in the cloud called thing speak where the data can be evaluated and analyzed per day and per month. The system has 20*4 LCD which displays the complete details of the employees and electrical appliances. The working of the system starts with the entering of an employee in the room, the buzzer beeps and LED turns on. Arduino Mega is used as a central processor that controls all the appliances. The code is written in C and simulation is done using Proteus ISIS. Finally, the implemented system shows the energy consumption per day and per month and a detailed comparative analysis is done with and without connecting the system which shows a better saving of energy in the employee room. The methodology adapted for our work is V-methodology.

Synaptic Transistors with Human Brain-Like fJ Energy Consumption via Double Oxide Semiconductors Engineering for Neuromorphic Electronics

2021 ◽  
Author(s):  
Seong-In Cho ◽  
Jae Bum Jeon ◽  
Joo Hyung Kim ◽  
Seunghee Lee ◽  
Wooseok Jeong ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Human Brain ◽  
Low Power ◽  
Low Power Consumption ◽  
Next Generation ◽  
Process Information ◽  
Oxide Semiconductors ◽  
Double Oxide ◽  
Significant Attention

Neuromorphic devices that mimic a human brain have attracted significant attention in the field of next-generation semiconductors. The human brain can efficiently process information with low power consumption. Several energy...

Sign in / Sign up

Export Citation Format

Share Document