Self Cleaning High Efficiency Particulate Air (HEPA) Filtration Without Interrupting Process Flow

2011 ◽  
Author(s):  
Chris Chadwick
Keyword(s):  
Glass Fibre ◽  
High Efficiency ◽  
Low Cost ◽  
Department Of Energy ◽  
Fuel Production ◽  
Process Flow ◽  
Sintered Metal ◽  
Self Cleaning ◽  
Increasing Demand ◽  
Clear Solution

The strategy of protecting the traditional glass fibre HEPA filtration train from it’s blinding contamination and the recovery of dust by the means of self cleaning, pre-filtration is a proven means in the reduction of ultimate disposal volumes and has been used within the Fuel Production Industry. However, there is an increasing demand in nuclear applications requiring elevated operating temperatures, fire resistance, moisture resistance and chemical composition that the existing glass fibre HEPA filtration cannot accommodate, which can be remedied by the use of a metallic HEPA filter media. Previous research suggests that the then costs to the Department of Energy (DOE), based on a five year life cycle, was $29.5 million for the installation, testing, removal and disposal of glass fibre HEPA filtration trains. Within these costs, $300 was the value given to the filter and $4,450 was given to the peripheral activity. Development of a low cost, cleanable, metallic, direct replacement of the traditional filter train will the clear solution. The Bergman et al work has suggested that a 1000 ft^3/min, cleanable, stainless HEPA could be commercially available for $5,000 each, whereas the industry has determined that the truer cost of such an item in isolation would be closer to $15,000. This results in a conflict within the requirement between ‘low cost’ and ‘stainless HEPA’. By proposing a system that combines metallic HEPA filtration with the ability to self clean without interrupting the process flow, the need for a tradition HEPA filtration train will be eliminated and this dramatically reduces the resources required for cleaning or disposal, thus presenting a route to reducing ultimate costs. The paper will examine the performance characteristics, filtration efficiency, flow verses differential pressure and cleanability of a self cleaning HEPA grade sintered metal filter element, together with data to prove the contention.

Design of On-Line Detection System for Paper Defects Based on Line-Scan Camera

2014 ◽  
Vol 536-537 ◽  
pp. 268-271
Author(s):  
Ping He ◽  
Chao Liu ◽  
Meng Wang ◽  
Sheng Mei Cao
Keyword(s):  
High Efficiency ◽  
Detection System ◽  
Low Cost ◽  
Digital Camera ◽  
Line Detection ◽  
Detection Scheme ◽  
Line Scan ◽  
On Line ◽  
Increasing Demand ◽  
Technology Level

Paper defects mean that there are some defects in the paper such as hole, emboss, and fold during the paper production, which mainly results from the limitation of technological level. In the past time, artificial visual inspection and off-line checking were often used to detect the paper defects. However, its shortcoming was highlighted along with the improvement of industrial technology level and increasing demand for paper. In order to realize the online detection and markers for paper defects, the project designs the on-line detection system based on line-scan digital camera. Firstly, the principle and detection scheme of the system for the paper defects was presented. Then the overall structure of the system was designed. After that, the hardware circuit of the system was designed using TMS320F2812 as main control chip. It mainly consists of the function of each module and the working process of the system. Finally, the software of the image acquisition system was presented. With the experimental verification, the system has advantages of low cost, high efficiency and strong resistance to interference. The functions and indexes achieved the design requirements.

The Research Development of Basic Theory in Micro-Forming

2013 ◽  
Vol 850-851 ◽  
pp. 192-195
Author(s):  
Xi Yang Sun ◽  
Dong Mei Li
Keyword(s):  
Size Effects ◽  
Temperature Effects ◽  
High Efficiency ◽  
Low Cost ◽  
Research Direction ◽  
Basic Theory ◽  
Future Research ◽  
Micro Forming ◽  
Increasing Demand ◽  
Important Significance

With the increasing demand for high efficiency, low cost and the bulk, so the production of micro-forming has a very important significance. Firstly, the introduction of micro-forming is introduced in this paper. Then, its basic theory, including size effects and temperature effects, is presented. At last, a future research direction is highlighted.

scholarly journals Thallus sectioning as an efficient monospore release method in Pyropia yezoensis (Bangiales, Rhodophyta)

2019 ◽  
Vol 32 (4) ◽  
pp. 2195-2200 ◽  
Author(s):  
Nianci Chen ◽  
Lei Tang ◽  
Xiaowei Guan ◽  
Rui Chen ◽  
Min Cao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Economic Value ◽  
Northern China ◽  
Pyropia Yezoensis ◽  
Effect Of Temperature ◽  
Seeding Strategy ◽  
Increasing Demand ◽  
Short Time ◽  
Release Method

AbstractThe red seaweed Pyropia yezoensis is a marine crop of important economic value and is widely cultivated in the coastal areas of northern China. The current seedling-raising system relies on the germination of conchospores, a process not fast enough to meet the increasing demand from farmers. In this study, we developed a monospore-dependent seedling method based on the asexual reproduction of the Pyropia thallus. The Pyropia thallus was physically sectioned into small pieces (microthalli) that were cultivated at 15 °C. The algal cells in the microthalli became morphologically condensed, underwent cell division, and then developed into monospores on the 5th day. The monospores were able to attach to the seeding rope in 24 h and germinated into healthy thalli. To optimize the efficiency of monospore release, we tested the effect of temperature and the size and original positions of the microthalli as well as the age of the mother thallus. Microthalli with a size of 30–50 cells from the middle and apex of 21-day-old thalli cultivated at 15 °C yielded the optimum production of monospores. Theoretically, in this thallus-to-thallus seeding strategy, 0.1 g of thallus could produce at least 107 monospores, with the same number of offspring thallus seedlings. Taking all of these advantages together, including the high efficiency, short time, low cost and easy operation, this physical sectioning method could serve as a promising seed source especially for new cultivars with superior traits in Pyropia farming and rapid replenishment of seedlings when thalli undergo disastrous diseases.

Facile synthesis of mesoporous polymeric carbon nitride nanosheets anchored by Pt with ultralow loading for high-efficiency photocatalytic H2 evolution

2021 ◽  
Author(s):  
Siyuan Ye ◽  
Changsheng Su ◽  
Lili He ◽  
Meng-Li Li ◽  
Zheng Yan ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
High Efficiency ◽  
Low Cost ◽  
H2 Evolution ◽  
Energy Usage ◽  
Facile Synthesis ◽  
Facile Fabrication ◽  
Increasing Demand ◽  
Carbon Nitride Nanosheets ◽  
Polymeric Carbon

Facile fabrication of low cost photocatalyst with enhanced activity and high atomic utilization has been in increasing demand for solar energy usage and/or conversion. In this work, a series of...

Environmental Fate, Analysis Method and Treatment Technology of Bisphenol A: A Review

2013 ◽  
Vol 448-453 ◽  
pp. 235-240
Author(s):  
Bo Wen Yang ◽  
Jun Zhang
Keyword(s):  
Bisphenol A ◽  
High Efficiency ◽  
Environmental Fate ◽  
Low Cost ◽  
Production Capacity ◽  
Treatment Technology ◽  
Environmental Endocrine Disruptors ◽  
Advanced Analysis ◽  
Increasing Demand ◽  
Physical And Chemical

As one of major environmental endocrine disruptors (EEDs), bisphenol A (BPA) has been drawn increasingly lots of people in the world, which is also widely identified as an indispensable raw chemical in plastics production, food cans and dental composites. With increasing demand and production capacity of BPA, more BPA will enter into and contaminate the environment. So it has become a challenge that excess BPA jeopardizes the health of human being. Considering a pretty low dose of BPA existing in the environment, some advanced analysis techniques have been carried out to analysis BPA, such as HLPC, GC-MS, LC-MS. Compared with other physical and chemical treatment technology, biological treatment technology has the advantage of low cost and high efficiency.

Design and Development of a Haynes 242® Nozzle Case for the Solar Mercury 50 Gas Turbine

2000 ◽  
Author(s):  
Heather McGregor ◽  
Devin Martin ◽  
Paul Browning ◽  
Michael Fitzpatrick ◽  
Krishna Srivastava ◽  
...  
Keyword(s):  
High Efficiency ◽  
Process Development ◽  
Low Cost ◽  
Department Of Energy ◽  
Ring Rolling ◽  
Component Design ◽  
Low Thermal Expansion ◽  
Alloy Process ◽  
Microstructural Evaluation ◽  
Design Requirements

In a joint effort between Solar Turbines Incorporated, Haynes International, and Doncasters Blaenavon, concurrent component design and manufacturing process development were undertaken to produce a Haynes 242 turbine nozzle case for Solar Turbines’ Mercury 50 engine. The Mercury 50 is a high efficiency, 4.2 MW generator set, developed through a cooperative agreement with the U.S. Department of Energy within the Advanced Turbine Systems (ATS) Program. Significant effort was applied to development of a reduced lead time, reliable, low cost process for producing a component with properties meeting design requirements. The resulting process involves the forging of (508-mm) 20-inch diameter ingots to (308-mm) 12-inch diameter billets, and ring rolling each billet to the final pre-machined shape. Further refinement in both billet manufacture and ring rolling are being conducted. The resulting component benefits from the desirable elevated temperature properties and uncoated oxidation resistance of Haynes 242, a next-generation, low thermal expansion alloy. In this paper, critical aspects of the turbine nozzle case design, and alloy process development will be presented. Microstructural evaluation of various billet forging processing routes will be related to mechanical properties, which in turn will be evaluated relative to design requirements.

scholarly journals Superhydrophobic PDMS-pCA@CNWF Composite with UV-Resistant and Self-Cleaning Properties for Oil/Water Separation

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 376
Author(s):  
Hanyu Wen ◽  
Yu-I Hsu ◽  
Hiroshi Uyama
Keyword(s):  
High Efficiency ◽  
Separation Efficiency ◽  
Oil Pollution ◽  
Low Cost ◽  
Woven Fabric ◽  
Water Separation ◽  
Oil Separation ◽  
Practical Applications ◽  
Oil Water ◽  
Self Cleaning

Oil separation is crucial for avoiding environmental pollution originating from industrial wastewater and oil spillage; therefore, it is essential to develop techniques for oil separation. Herein, a new membrane with superhydrophilicity was synthesized by a facile, green, and low-cost method. First, cellulose non-woven fabric (CNWF) was modified by poly (catechin) (pCA), which has good antioxidant and antibacterial activities, to make it unaffected by ultraviolet light and to improve the stability of the structure. Then, hydrolyzed polydimethylsiloxane (PDMS) was coated on the pCA@CNWF surface via chemical bonding to make the composite hydrophobic. This durable superhydrophobic fabric can be used to separate various oil/water mixtures by gravity-driven forces with high separation efficiency (over 98.9%). Additionally, the PDMS-pCA@CNWF possesses the advantages of flexibility, high efficiency, and an outstanding self-cleaning performance, and demonstrates significant potential for applications in various environments, even under various harsh conditions, which make it very promising for the treatment of oil pollution in practical applications.

scholarly journals Nickel confined in 2D earth-abundant oxide layers for highly efficient and durable oxygen evolution catalysts

2020 ◽  
Vol 8 (26) ◽  
pp. 13340-13350
Author(s):  
Yayun Pu ◽  
Matthew J. Lawrence ◽  
Veronica Celorrio ◽  
Qi Wang ◽  
Meng Gu ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
High Efficiency ◽  
Low Cost ◽  
Oxide Layers ◽  
Highly Efficient ◽  
Earth Abundant ◽  
Increasing Demand

Low cost, high-efficiency catalysts towards water splitting are urgently required to fulfil the increasing demand for energy.

Low-Cost, Flexible, and Self-Cleaning 3D Nanocone Anti-Reflection Films for High-Efficiency Photovoltaics

2014 ◽  
Vol 26 (18) ◽  
pp. 2805-2811 ◽  
Author(s):  
Kwong-Hoi Tsui ◽  
Qingfeng Lin ◽  
Hungtao Chou ◽  
Qianpeng Zhang ◽  
Huiying Fu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Self Cleaning

A High-Efficiency SOFC Hybrid Power System Using the Mercury 50 ATS Gas Turbine

2001 ◽  
Author(s):  
Wayne L. Lundberg ◽  
Stephen E. Veyo ◽  
Mark D. Moeckel
Keyword(s):  
Power System ◽  
Gas Turbine ◽  
Power Efficiency ◽  
High Efficiency ◽  
Low Cost ◽  
Department Of Energy ◽  
Hybrid Power ◽  
And Performance ◽  
Fossil Power Plant ◽  
Generating System

The conceptual design of a 20 MWe-class hybrid power generating system that integrates a Siemens Westinghouse pressurized solid oxide fuel cell generator with a Mercury 50 gas turbine is discussed. The Mercury 50 was designed and developed by Caterpillar/Solar Turbines during the U.S. Department of Energy (DOE) Advanced Turbine Systems (ATS) program, and the hybrid system design concept was evaluated during a recently completed project that was part of the DOE High Efficiency Fossil Power Plant (HEFPP) program. While achieving a high power system efficiency by the hybrid cycle approach was important, the focus of the design study was to select the SOFC generator capacity such that the low specific cost of the ATS gas turbine and the high efficiency of the more expensive PSOFC generator would combine optimally to produce an attractively-low cost of electricity (COE) for the overall power system. The system cycle and physical characteristics are described; power, efficiency, and emissions estimates are presented; and estimates of system cost and COE are provided. In addition, two bottoming cycle options (steam turbine and ammonia turbine) are described, and performance and cost projections for each are reviewed.

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