Mass transfer characteristics and energy penalty analysis of MEA regeneration process in packed column

2021 ◽  
Author(s):  
Fengming Chu ◽  
Guozhen Xiao ◽  
Guoan Yang
Keyword(s):  
Mass Transfer ◽  
Energy Consumption ◽  
Packed Column ◽  
High Energy ◽  
Regeneration Process ◽  
Transfer Characteristics ◽  
Energy Penalty ◽  
High Energy Consumption ◽  
Penalty Analysis

The high energy consumption of the MEA regeneration process is the biggest challenge for the application of CO2 capture by the monoethanolamine (MEA) solution.

scholarly journals Effects of stripper configurations on mass transfer and energy consumption of regeneration process

2020 ◽  
Vol 15 (2) ◽  
pp. 190-201
Author(s):  
Fengming Chu ◽  
Minghui Su ◽  
Guoan Yang
Keyword(s):  
Mass Transfer ◽  
Energy Consumption ◽  
Heat And Mass Transfer ◽  
Specific Energy Consumption ◽  
High Energy ◽  
Regeneration Process ◽  
Transfer Performance ◽  
Energy Consumption Analysis ◽  
Main Barrier ◽  
Volume Method

Abstract The high energy consumption of the regeneration is the main barrier of the CO2 capture system application. The stripper is the primary device for the regeneration process, which involves with the transport process and reactions. It is beneficial for the energy saving to clarify the impacts of the stripper configurations on the heat and mass transfer performance in the stripper. Based on the representative elementary volume method and pseudo-single-liquid model, a novel computational model of heat and mass transfer was developed, in which the H2O transfer process was also taken into account. The simulation results were compared with the experimental data. The effects of the stripper configurations on the heat and mass transfer performance were investigated, and the energy consumption analysis of different strippers under two representative working conditions was carried out. The results show that the height of stripper is dominant in the heat and mass transfer performance, rather than diameter. When the desorbing rate of CO2 is above 50%, the desorbing rate of CO2 increases with the stripper height rising and the specific energy consumption of regeneration process only increases a little.

Oxygen Supply Method Using Gas-Permeable Film for Wastewater Treatment

1993 ◽  
Vol 28 (7) ◽  
pp. 243-250 ◽  
Author(s):  
Y. Suzuki ◽  
S. Miyahara ◽  
K. Takeishi
Keyword(s):  
Wastewater Treatment ◽  
Energy Consumption ◽  
Oxygen Transfer ◽  
Transfer Rate ◽  
Oxygen Supply ◽  
Oxygen Transfer Rate ◽  
High Energy ◽  
High Rate ◽  
N Removal ◽  
High Energy Consumption

Gas-permeable film can separate air and water, and at the same time, let oxygen diffuse from the air to the water through the film. An oxygen supply method using this film was investigated for the purpose of reducing energy consumption for wastewater treatment. The oxygen transfer rate was measured for the cases with or without biofilm, which proved the high rate of oxygen transfer in the case with nitrifying biofilm which performed nitrification. When the Gas-permeable film with nitrifying biofilm was applied to the treatment of wastewater, denitrifying biofilm formed on the nitrifying biofilm, and simultaneous nitrification and denitrification occurred, resulting in the high rate of organic matter and T-N removal (7 gTOC/m2/d and 4 gT-N/m2/d, respectively). However, periodic sloughing of the denitrifying biofilm was needed to keep the oxygen transfer rate high. Energy consumption of the process using the film in the form of tubes was estimated to be less than 40% of that of the activated sludge process.

scholarly journals Polymer–Lipid Pharmaceutical Nanocarriers: Innovations by New Formulations and Production Technologies

Pharmaceutics ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 198
Author(s):  
Sabrina Bochicchio ◽  
Gaetano Lamberti ◽  
Anna Angela Barba
Keyword(s):  
Energy Consumption ◽  
Membrane Permeability ◽  
High Energy ◽  
Delivery Systems ◽  
Hybrid Nanoparticles ◽  
Industrial Implementation ◽  
Production Technologies ◽  
Industrial Level ◽  
High Energy Consumption ◽  
Modern Technologies

Some issues in pharmaceutical therapies such as instability, poor membrane permeability, and bioavailability of drugs can be solved by the design of suitable delivery systems based on the combination of two pillar classes of ingredients: polymers and lipids. At the same time, modern technologies are required to overcome production limitations (low productivity, high energy consumption, expensive setup, long process times) to pass at the industrial level. In this paper, a summary of applications of polymeric and lipid materials combined as nanostructures (hybrid nanocarriers) is reported. Then, recent techniques adopted in the production of hybrid nanoparticles are discussed, highlighting limitations still present that hold back the industrial implementation.

scholarly journals High energy consumption or low economic growth?

Nature ◽  
1978 ◽  
Vol 273 (5664) ◽  
pp. 587-587
Author(s):  
L. G. BROOKES
Keyword(s):  
Economic Growth ◽  
Energy Consumption ◽  
High Energy ◽  
High Energy Consumption

scholarly journals A lightweight magnetic gripper for an aerial delivery vehicle: design and applications

ACTA IMEKO ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 61
Author(s):  
Giuseppe Sutera ◽  
Dario Calogero Guastella ◽  
Giovanni Muscato
Keyword(s):  
Energy Consumption ◽  
Permanent Magnets ◽  
High Energy ◽  
Vehicle Design ◽  
Delivery Vehicle ◽  
Delivery Service ◽  
Remote Areas ◽  
Different Types ◽  
Robot Systems ◽  
High Energy Consumption

<p>In recent years, drones have become widely used in many fields. Their vertical flight capability makes these systems suitable for carrying out a variety of tasks. In this paper, the delivery service they provide is analysed. The delivery of goods quickly and to remote areas is a relevant application scenario; however, the systems proposed in the literature use electromagnets, which affect the duration of the flight. In addition, these devices are heavy and suffer from high energy consumption, which reduces the maximum transportable payload. This study proposes a new lightweight magnetic plate composed of permanent magnets, capable of collecting and positioning any object as long as it has a ferromagnetic surface on the top. This plate was developed for the Mohamed Bin Zayed International Robotics Challenge 2020, an international robotics competition for multi-robot systems. Challenge two of this competition required a drone capable of picking up different types of bricks and assembling them to build a wall according to an assigned pattern. The bricks were of different colours and sizes, with weights ranging from 1 to 2 kg. In light of this, it was concluded that weight was the most relevant specification to consider in drone design.</p>

scholarly journals Research on the Defrosting System of Refrigerated Containers Combining Air and Electro-Thermal Energy and the Controlling Strategy

2021 ◽  
Vol 248 ◽  
pp. 02058
Author(s):  
Kaitai Hua
Keyword(s):  
Energy Consumption ◽  
Thermal Energy ◽  
Pressure Change ◽  
High Energy ◽  
Structural Features ◽  
Low Energy ◽  
Wind Pressure ◽  
Long Duration ◽  
Low Energy Consumption ◽  
High Energy Consumption

Considering the problems such as long duration of defrosting, low working reliability and high energy consumption of refrigerated containers, this paper put forward a new defrosting method combining air and electro-thermal energy, and designed a new defrosting structure system based on the structural features of refrigeration modules of refrigerated containers. The two-variable method of wind pressure change and temperature difference change on both sides of the evaporator was used to detect frosting, and the specific controlling strategy supporting the new defrosting system was provided to realize the effect of intelligent defrosting. It can provide references for fast defrosting, intelligent defrosting and low energy consumption defrosting of refrigerated containers.

One High Efficiency Production Line of Clinker and Slag Grinding Separately by Roller Mill in Cement Industry

2008 ◽  
Vol 58 ◽  
pp. 83-89
Author(s):  
Ning Chang Liu ◽  
Zhao Feng Li
Keyword(s):  
Energy Consumption ◽  
High Efficiency ◽  
High Energy ◽  
Cement Industry ◽  
Grinding Process ◽  
Roller Mill ◽  
Low Efficiency ◽  
Cement Grinding ◽  
Grinding System ◽  
High Energy Consumption

In cement industry, many grinding up systems are on operating now. The tradition process of tube mill grinding system is high energy consumption, so it’s low efficiency, especially in the final cement grinding process. The value and advantage of slag is recognized more and more, but it’s difficult to be grinded up. Furthermore, the disadvantage and shortages to grind up clinker compounded with slag to produce cement are obvious and adopted. The best process is to grind up slag, clinker separately. Then, these two kinds of powder are compounded by a mixer. Hereby, it introduces a design of the process to grind up clinker, slag by one roller mill.

Efficient Strategies of VMs Scheduling Based on Physicals Resources and Temperature Thresholds

2020 ◽  
Vol 10 (3) ◽  
pp. 81-95
Author(s):  
Djouhra Dad ◽  
Ghalem Belalem
Keyword(s):  
Energy Consumption ◽  
Data Centers ◽  
High Energy ◽  
The Internet ◽  
Co2 Gas ◽  
Temperature Thresholds ◽  
Cpu Utilization ◽  
Consumer Services ◽  
High Energy Consumption ◽  
Over Time

Cloud computing offers a variety of services, including the dynamic availability of computing resources. Its infrastructure is designed to support the accessibility and availability of various consumer services via the Internet. The number of data centers allow the allocation of the applications, and the process of data in the cloud is increasing over time. This implies high energy consumption, thus contributing to large emissions of CO2 gas. For this reason, solutions are needed to minimize this power consumption, such as virtualization, migration, consolidation, and efficient traffic-aware virtual machine scheduling. In this article, the authors propose two efficient strategies for VM scheduling. SchedCT approach is based on dynamic CPU utilization and temperature thresholds. SchedCR approach takes into consideration dynamic CPU utilization, RAM capacity, and temperature thresholds. These approaches have efficiently decreased the energy consumption of the data centers, the number of VM migrations, and SLA violations, and this reduces, therefore, the emission of CO2 gas.

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