scholarly journals Study and Analysis of Solar Cabinet Dryer on Passive Mode by Using Aluminium Foil, Solar Selective Black Carbon Material and Silica Sand (Concrete)

2021 ◽  
Vol 9 (VIII) ◽  
pp. 354-362
Author(s):  
Sachin Kulshrestha
Keyword(s):  
Black Carbon ◽  
Carbon Material ◽  
Removal Rate ◽  
Research Work ◽  
Silica Sand ◽  
Moisture Removal ◽  
Passive Mode ◽  
Storage Material ◽  
Work Analysis ◽  
Enhance Efficiency

In this research work started to study of various article which is related to solar cabinet dryer. In many article do work repetition and some having different type of work analysis. There are work mostly to increase its efficiency, workability and moisture removal rate with changes in different parameters. Some of authors work passive mode solar cabinet dryer and some was work on active solar cabinet dryer. In this study observed that some of researcher use silica sand and metals particles. Every parameter have focused on different purpose of work. After the study of various articles analyze that use of mixture black carbon material and silica concrete as a storage material. That is important for increase moisture removal rate and drying rate. It will also enhance efficiency and workability of solar cabinet dryer. That will use in industry and winter oriented season in future aspects.

scholarly journals Assessing the Adsorption of Bipyridinium Herbicides on Model Soil Granular Media

2021 ◽  
Vol 2 ◽  
Author(s):  
Nahim R. Tadeo-Jalife ◽  
Ruben Vasquez-Medrano ◽  
Ivan R. Quevedo
Keyword(s):  
Quartz Sand ◽  
Supporting Electrolyte ◽  
Research Work ◽  
Silica Sand ◽  
Supernatant Fraction ◽  
Natural Soil ◽  
Soil Matrix ◽  
Adsorption Mechanisms ◽  
Model Soil ◽  
General Terms

In this research work, the adsorption of two bipyridinium herbicides (i. e., Diquat and Paraquat) on natural soil and on model soil surfaces has been studied at different water chemistries commonly found in the environment (e.g., pH, supporting electrolyte, and presence of humic or fulvic acids). The experimental work was carried out in the laboratory, using experimental batches of clean quartz sand, silanized quartz sand and sandy soil as a model of agricultural topsoil where herbicides are commonly used and can be adsorbed. The concentrations reached at the equilibrium were analyzed by UV-Visible Spectroscopy for the supernatant fraction of the samples. The concentrations were fitted using adsorption isotherms to determine the adsorption mechanisms (i.e., chemisorption or physisorption) at the interface. In general terms, we have encountered that the nature of the soil matrix plays an important role on the study of pollutant adsorption. In experiments carried out on silica sand, the most abundant component of the natural soil matrix, no significant sorption was observed (<1.5 mg/g) for any of the herbicides. Yet, in experiments carried out on the presence of clay and natural organic matter (i.e., fulvic and humic acids), the adsorption of both herbicides is much higher, likely due to the chemical structure of the molecules that might facilitate the complexation with both herbicides. This investigation improves our understanding of the role that soil granular components play on the absorption of two commonly used herbicides and adequately predict their fate in natural aquatic environments.

Steel Wire Grinding Testing Based on New Type Abrasive Belt Grinding Machine

2012 ◽  
Vol 602-604 ◽  
pp. 2273-2278
Author(s):  
Ping Zhang ◽  
Jia Chun Li
Keyword(s):  
Metal Removal ◽  
Removal Rate ◽  
Steel Wire ◽  
Research Work ◽  
Wire Drawing ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
New Type ◽  
Working Principle ◽  
Grinding Machine

As a new process, the abrasive belt grinding plays an increasingly important role in the field of machining. It meets a variety of processing requirements. The concept of abrasive belt grinding and its working principle were introduced, and a new type of abrasive belt grinding equipment for removing the rust on steel wire surface was designed. Some key experiments for testing grinding force，the metal removal rate，belt wear rate、grinding ratio，grinding depth and wire speed were studied. The research work provides rational parameters for the pretreatment of rust removal in metal wire drawing processing.

Liquid Desiccant Air Conditioning Using Single Storage Solution Tank, Evaporative Cooling, and Marquise-Shaped Solar Collector

2021 ◽  
Vol 143 (11) ◽  
Author(s):  
M. Sajesh ◽  
Geleta Fekadu ◽  
Kalpana ◽  
Sudhakar Subudhi
Keyword(s):  
Solar Collector ◽  
Air Conditioning ◽  
Removal Rate ◽  
Packed Bed ◽  
Solution Temperature ◽  
Moisture Removal ◽  
Liquid Desiccant ◽  
Mass Flowrate ◽  
Experimental Values ◽  
Storage Solution

Abstract The present paper deals with the experimental study of the liquid desiccant air conditioning system using the single storage solution tank. The novelty of the system is that the dehumidification and regeneration are carried out in a single compact unit. The regeneration of solution is done using the marquise-shaped solar collector. The liquid desiccant solution used here is calcium chloride and water. The moisture removal rate (MRR), moisture, and enthalpy effectiveness are used as the performance parameters. The effects of mass flowrate of solution, solution temperature, inlet air temperature, and relative humidity (RH) on the performance are investigated. The experimental outcome shows that when the solution flowrate is increased from 0.263 to 0.437 kg/s, the MRR is improved from 5.08 to 7.82 g/kg and when the RH is increased from 70% to 92%, the MRR is enhanced from 5.56 to 12.45 g/kg. The new correlation for moisture effectiveness is developed based on the experimental values and depending parameters, and also another correlation is developed based on Chung’s correlation (Chung, T.-W., 1994, “Predictions of Moisture Removal Efficiencies for Packed-Bed Dehumidification Systems,” Gas Sep. Purif., 8(4), pp. 265–268).

PERFORMANCE ASSESSMENT OF A SOLID DESICCANT AIR DEHUMIDIFIER

2016 ◽  
Vol 78 (8-4) ◽  
Author(s):  
Nazri Kamsah ◽  
Haslinda Mohamed Kamar ◽  
Muhammad Imran Wan Khairuzzaman ◽  
M. Idrus Alhamid ◽  
Fazila Mohd Zawawi
Keyword(s):  
Removal Rate ◽  
Operating Parameters ◽  
Inlet Temperature ◽  
Moisture Removal ◽  
Desiccant Wheel ◽  
Air Inlet ◽  
Low Humidity ◽  
Experimental Rig ◽  
Humidity Environment

The presence of moisture in the air along with temperature has a long term and devastating effect on man and material. One way to create a low humidity environment is by using a solid desiccant wheel system. In the present work, an experimental analysis has been carried out under steady-state conditions to investigate the effects of different operating parameters on a solid desiccant wheel system performances. An experimental rig consists of an FFB300 air dehumidifier system was constructed. A parametric investigation was carried out to examine the effects of the reactivation air inlet temperature and process air outlet velocity on the thermal effectiveness, dehumidification efficiency, and moisture removal rate of the desiccant wheel system. The analysis shows that both thermal effectiveness and dehumidification efficiency decrease with the increase of the reactivation air inlet temperature, by 2.5 % and 43 %, respectively. Likewise, when the process air outlet velocity increases both performances criteria reduce by 10 % and 28 %, respectively. The moisture removal rate increases significantly by 30 % as the reactivation air inlet temperature increases. However, the process air outlet velocity has no significant effect on the moisture removal rate. 

scholarly journals Effect of cover design on moisture removal rate of a cabinet type solar dryer for food drying application

2019 ◽  
Vol 160 ◽  
pp. 769-776 ◽  
Author(s):  
Majedul Islam ◽  
Md Imrul Islam ◽  
Mehedi Tusar ◽  
Amir Hamza Limon
Keyword(s):  
Removal Rate ◽  
Moisture Removal ◽  
Solar Dryer ◽  
Cover Design

Experimental Analysis of an Air-to-Air Heat Exchanger for Use in a Refrigeration Brayton Cycle

Volume 3 ◽  
2004 ◽  
Author(s):  
Alireza Kargar ◽  
Mohammad H. Hosni ◽  
Steve Eckels ◽  
Tomas Gielda
Keyword(s):  
Heat Exchanger ◽  
Pressure Drop ◽  
Removal Rate ◽  
Experimental Results ◽  
Airflow Rate ◽  
Brayton Cycle ◽  
Moisture Removal ◽  
Research Project ◽  
Cycle System ◽  
Automotive Air Conditioning

The refrigeration Brayton cycle, which has been used extensively in various industries, has an excellent potential for use in automotive air conditioning applications. However, the air-cycle system has a couple of drawbacks including fog generation and low cycle efficiency. In this research project, an air-to-air heat exchanger called a ‘mixer’ is designed and used at the outlet of a refrigeration Brayton cycle. The primary function of the mixer is to remove moisture from the secondary warm airflow into the system. Successful moisture removal from the secondary airflow results in achieving the second function of fog dissipation from the primary cold airflow. In order for the system to perform appropriately, the moisture removal rate must be kept at the highest possible rate. The experimental results from this research project reveal that to enhance moisture removal rate, one may either increase the primary cold airflow rate, decrease the secondary warm airflow rate, or the combination of the above airflow adjustments. Furthermore, based on experimental results, one may speculate that there is an optimum point in decreasing the secondary airflow rate. However, in increasing the primary airflow rate, one must be aware of the pressure drop through the cold side of the mixer as the higher pressure drop results in higher power consumption for the Brayton cycle. It is important to point out that appropriate levels of the primary and secondary airflows impacts the mixer effectiveness, and that for a constant cold airflow rate, decreasing the warm airflow rate below the cold airflow rate results in higher effectiveness.

scholarly journals Investigation of the wet removal rate of black carbon in East Asia: validation of a below- and in-cloud wet removal scheme in FLEXPART v10.4

2020 ◽  
Author(s):  
Yongjoo Choi ◽  
Yugo Kanaya ◽  
Masayuki Takigawa ◽  
Chunmao Zhu ◽  
Seung-Myung Park ◽  
...  
Keyword(s):  
South Korea ◽  
East Asia ◽  
Black Carbon ◽  
Model Simulation ◽  
Removal Rate ◽  
Convective Available Potential Energy ◽  
Transport Sector ◽  
Wet Scavenging ◽  
Cloud Scavenging ◽  
Wet Removal

Abstract. Understanding the global distribution of atmospheric black carbon (BC) is essential to unveil its climatic effect. However, there are still large uncertainties regarding the simulation of BC transport due to inadequate information about the removal process. We accessed the wet removal rate of BC in East Asia based on long-term measurements over the 2010–2016 period at three representative background sites (Baengnyeong and Gosan in South Korea and Noto in Japan). The average wet removal rate, represented by transport efficiency (TE), i.e. the fraction of undeposited BC particles during transport, was estimated as 0.73 in East Asia from 2010 to 2016. According to accumulated precipitation along trajectory, TE was lower in East and North China, where the industrial sector (thin-coated) is dominant; in contrast, that in South Korea and Japan showed higher values due to the transport sector (thick-coated), with emissions mainly from diesel vehicles. By the same token, TE in winter and summer showed the highest and lowest values, respectively, depending on the dominant emission sectors, such as house heating (thick-coated) and industry. The average half-life and e-folding lifetime of BC were 2.8 and 7.1 days, respectively, similar to previous studies, but those values differed according to the geographical location and meteorological conditions of each site. Next, by comparing TE from the FLEXible PARTicle (FLEXPART) Lagrangian transport model (version 10.4), we diagnosed the scavenging coefficients (s−1) of the below- and in-cloud scavenging scheme implemented in FLEXPART. The overall median TE from FLEXPART (0.91) was overestimated compared to the measured value, implying underestimation of wet scavenging coefficients in the model simulation. The median of the below-cloud scavenging coefficient showed a lower value than that calculated from FLEXPART, by a factor of 1.7. On the other hand, the overall median of the FLEXPART in-cloud scavenging coefficients was highly underestimated by 1 order of magnitude compared to the measured value. From the analysis of artificial neural networks, the convective available potential energy, which is well known as an indicator of vertical instability, should be considered in the in-cloud scavenging process to improve the representative regional difference in BC wet scavenging over East Asia. For the first time, this study suggested an effective and straightforward evaluation method for wet scavenging schemes (both below- and in-cloud) by introducing TE along with excluding effects from the inaccurate emission inventories.

Impact of Tool Inserts in High Speed Machining of GFRP Composite Material

2015 ◽  
Vol 787 ◽  
pp. 664-668 ◽  
Author(s):  
K. Anand ◽  
M.V. Siddharth ◽  
K.S. Vijay Sekar ◽  
S. Suresh Kumar
Keyword(s):  
High Speed ◽  
Removal Rate ◽  
Research Work ◽  
Aluminium Nitride ◽  
High Speed Machining ◽  
Feed Force ◽  
Glass Fibre Reinforced Polymer ◽  
Polymer Tube ◽  
Cutting Speeds ◽  
Titanium Aluminium

Composite materials are in-homogenous, anisotropic and cause high tool wear at high cutting speeds in machining. Industrial practices worldwide reveal a need to use high speed machining to achieve the desired material removal rate, surface finish and to reduce cost cutting. In this research work, impact of turning glass fibre reinforced polymer tube with two contrasting turning tool inserts such as titanium aluminium nitride and tungsten carbide have been analysed. The turning was conducted at low to high cutting conditions up to spindle speeds of 2000 rpm and feed rate of 0.446mm/rev. The cutting force, feed force were acquired with a strain gauge based dynamometer, the chip cross section was observed using scanning electron microscopy and the temperature was sensed with a infra red thermo sensor. The advanced titanium aluminium nitride insert shows better machining characteristics across cutting speeds.

Parametric Analysis of Different Grades of Steel Materials Used in Plastic Industries through Die Sinking EDM Process

2016 ◽  
Vol 3 (1) ◽  
pp. 45-74 ◽  
Author(s):  
Goutam Kumar Bose ◽  
Pritam Pain
Keyword(s):  
Removal Rate ◽  
Research Work ◽  
Entropy Method ◽  
Control Parameters ◽  
Well Design ◽  
Materials Used ◽  
Linear Graphs ◽  
Pulse On Time ◽  
Pulse Off Time ◽  
Edm Process

In the present research work four different work materials viz. EN24, D2, H13, P20 which are commonly use in plastic industries are considered for machining applying EDM process. Four different control parameters such as pulse on time, pulse off time, gap current, and Spark gap are considered to study the effect on the performance of responses like material removal rate, surface roughness and overcut using a square shape copper tool with lateral flushing. A well design experimental plan is used to reduce the total number of experiment following L9 orthogonal array. Based on Taguchi methodology the significant process parameters affecting the responses are identified applying ANOVA for each material. The effect of the responses with respect to the four control parameters for the four different work materials is compared through linear graphs. A well-known Grey relational analysis is carried out where the weights are calculated using entropy method to full fill the multi criteria decision making process.

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