Potassium promoted core–shell-structured FeK@SiO2-GC catalysts used for Fischer–Tropsch synthesis to olefins without further reduction

2020 ◽  
Vol 44 (1) ◽  
pp. 87-94
Author(s):  
Zhijiang Ni ◽  
Xuefei Zhang ◽  
Jirong Bai ◽  
Zhilei Wang ◽  
Xi Li ◽  
...  

The GC and K promoted Fe-based catalysts prepared by modified sol–gel method, which omits the complex and high energy consumption reduction process, can be used directly for highly efficient FTS and thus will be more promising in the future.

2015 ◽  
Vol 16 (SE) ◽  
pp. 89-95
Author(s):  
Rasool Karimi

In recent years, because of various reasons of auditing and calculating necessity for the rate of energy consumption and its savings have been as certain necessity. Among this, construction section has allocated more than one third of country’s energy consumption to itself that its value has been determined more than 6 billion dollars annually according to world prices. Now considering less attention to energy, almost all country’s buildings don’t have technical regulations for preventing wasting heat or cold energy and considering that swimming pools are building with high energy consumption and energy is used there mediating various factors, this research is sought to investigate the situation of energy consumption in pool of Imam Khomeini University Of Naval Forces. The most important energy consumer factors are sidewall thermal losses with surface evaporation of pool's water and air conditioning that finally mentioned performable solutions in pool will be investigated in terms of achieving energy consumption reduction. It is tried in this study to compare performed auditing with defined standards in nineteenth discussion of national regulations and by economic evaluating and the method of calculating return on capital of each action, the priority of doing performable actions in order to reduce energy consumption is determined and compared using existing software of modeling.


Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2218
Author(s):  
Francisco J. Rey Martínez ◽  
Julio F. San José Alonso ◽  
Eloy Velasco Gómez ◽  
Ana Tejero González ◽  
Paula M Esquivias ◽  
...  

The high energy consumption of cooling systems justifies the need for strategies to increase the efficiency of the facilities, in order to reduce the related CO2 emissions. This study aims to improve the performance and reduce the energy consumption of an 8.6 MW air cooled chiller. This installed capacity is biased due to the screw compressors, of 2.98 Energy Efficiency Ratio (EER) at full load (characteristics provided by the manufacturer). The chiller unit has been modified by placing evaporating cooling pads before the condensing coils. The chiller has been monitored for three months, recording over 544,322 measurements (5 min-step data), with and without the evaporative cooling pads, to assess the performance. Data comparison has been done by selecting two days (with and without evaporative panels) with the same health care load and temperatures. Implementing the proposed strategy yields an improvement in the European Seasonal Energy Efficiency Ratio (ESEER) from 3.69 to 4.83, while the Total Equivalent Warming Impact (TEWI) decreases about 1000 tCO2. Energy savings of up to 32.6 MWh result into a payback period lower than 2 years.


2011 ◽  
Vol 374-377 ◽  
pp. 141-145
Author(s):  
Xiao Lin Lu ◽  
Lei Wang

Aim at the current situation of high energy-consumption of the large public building,proposed a WebAccess–based energy-consumption management and energy-saving analysis system.And it be used Zigbee distributed energy consumption measurement net for data remote transmission. The status of energy consumption in the future can be predicted through energy-consumption databases and energy-consumption models were built. The system can real time monitor and manage the energy-consumption status in large public constructions. It can provide a favorable foundation not only for energy conservation and reformation of those completed large public building, but also for energy conserved operation and supervision of those new constructions. This can help to achieve the goal of energy conservation and energy-consumption reduction in large public building.


2021 ◽  
Vol 38 (3) ◽  
pp. 837-843
Author(s):  
Yaswanth Kumar Alapati ◽  
Suban Ravichandran

One of the fields which needs the most security is Ad hoc Network (ANET). The term ANET guarantees that there is no central authority so as to administer the signals. Security is a basic issue while using ANET for establishing communication. A ANET is an assortment of remote signals that can progressively be set up at anyplace and whenever without utilizing any prior system framework. Because of its volatile nature, it has mobility issues to improve the arrangement of the system. One of the difficulties is to recognize the malicious signals in the system. Because of malicious signals, data loss or high energy consumption will occur which reduce the overall performance of the ANET. There are a few circumstances when at least one signal in the system become malevolent and will destroy the limit of the system. The point of this work is to recognize the malignant signals quickly to avoid loss of data. The conventional strategy for firewall and encryption isn't adequate to secure the system. In this way a malicious signal identification framework must be added to the ad hoc network. A signal needs to be secured when utilizing the resources and to provide secure communication. The ad hoc networks have several issues like, congestion, overload, data loss and energy consumption. In the proposed work a framework for Rapid Malicious Signal Detection with Energy Consumption Reduction (RMSDwECR) Method is proposed. The proposed method is compared with the traditional methods in terms of load in the network, data loss ratio, signal transmission rate, energy consumption levels, malicious signal identification time and throughput levels. The proposed method exhibits better performance than the traditional methods.


1993 ◽  
Vol 28 (7) ◽  
pp. 243-250 ◽  
Author(s):  
Y. Suzuki ◽  
S. Miyahara ◽  
K. Takeishi

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.


Sign in / Sign up

Export Citation Format

Share Document