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New feature || 2nd Anniversary Celebrations || TEAM GEC LIBRARY



Hi we put our efforts to launch a new feature in geclibrary for writers who were enthusiastic with their writings to publish their articles here .
Note : Language is not a dead end you can send us in any of indian languages .

>> The writers who are writing more posts will be awarded with special column on the site .....



Website :: http://writers.geclibrary.in  (* launched )

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Email :  kvsnaidu6.postit@blogger.com

Note : all writings will be posted after successful review ...

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GEC LIBRARY

Green Engineering - Self Study Course

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key for ii mid exam of self study course Green Engineering

2. Energy conservation in industrial ecology:
                         Energy conservation in industrial ecology is to be studied carefully for many reasons.  At present, use of fossil fuels is more to generate the power, which is being used for the purpose of transforming materials of various kinds into their new forms suitable for use i.e., products.  But fossil fuels are fixed in quantity.  Hence fast depletion of these reserves leads to deprivation of energy resources to future generations.  Energy residues in the form of heat and exhaust gases are emitted by industrial organisms into surroundings causing global warming and pollution of air.  Hence energy analysis is the urgent need to reduce the impact on environment and to achieve the sustainability for energy.It encompasses products as well as manufacturing facilities.
                        In the case of products, that use energy during their service lifetimes – engines, computers, buildings and so on, there is a particular premium on designs that minimize energy consumption.
                        It is usually the case that the initial extraction of resources is quite energy intensive because of the separation and purification involved.  Wherever possible, use of recycled material is desirable from both a material and energy perspective.
                        Energy conservation can be accomplished by undertaking energy audit at each stage of material extraction, processing and manufacturing.
                        Assessment of product life cycle is another mode of calculating the energy use and resultant emissions at each stage.  For example material substitution can be thought of as one of the alternate solutions for energy conservation.  For example substitution of magnesium or aluminium parts such as body, doors, hoods, wheels, wheel hubs sheet frames, for steel parts in a mid size automobile.  It not only saves the energy during manufacture but also during use.  Because vehicle become lighter which leads to fuel efficiency.
                        For lighting purpose only LED bulbs may be used.  Even renewable energy sources like solar energy is a viable solution in the longrun.  Strict discipline and judicious use of appliances naturally leads to energy conservation.
3. Water Conservation in Sustainability Engineering:
                        Many actions of industry involve use of water, water budgets and responses to what the budgets reveal are inherently part of industrial ecology.  Water intensity differs greatly with industrial sector and with life stage.  In principle a life-cycle water analysis for any commercial substance or product of choice must be conducted to quantity the use of water at each substance or product life stage and resulting environmental impacts.  Some industries which use highest rates of water are petroleum and coal processing, primary metals, chemicals and paper.
§  Promote designs that minimize water consumption during product use.
§  Water needed for extraction of material is more for recycling the material.  Hence use of recycling materials is desirable from both material and water perspective.
§  To improve the air quality and to reduce the use of fossil fuels electric vehicles are coming on to the roads.  But water needed for electric vehicles are more compared to vehicles using gasoline.
§  Water must be carefully recycled and can be used for different purposes.  For example It can be used once for high – purity manufacturing, a second time for toilets and a third time (after some filtration) for irrigation of the property.
§  Re-use of components automatically prevents usage of water.
4.  Definition of a model and the need of a model in industrial ecology:
                         A model is a simplified representation of a real life system or a real operation or a real process, in which only the basic aspects of the system are considered.  The model puts the uncertainties or complexities of the problem into a logical frame work, which is amenable to comprehensive analysis.
                        Industrial ecology is the study of material and energy flows through industrial systems.  It seeks to quantity the material flows and industrial processes that make modern society function.  Industrial ecologists are often concerned with the impacts that industrial activities have on the environment, with use of the planet’s supply of natural resources, and with problems of waste disposal.
                        The intellectual construct that attempts to describe those interrelationships is termed as ‘Model’
                        Varieties of models can be used to study industrial ecology.
                        At the most basic level is conceptual model.  It only describes structural aspects of the system.  Such a model represents the components of the system of interest and the potential for interaction among the components.
                        Next level of modeling is mathematical modeling.  If the objective of study is to understand the structure of the system and its operation, then there arises a need to estimate the magnitude of the interactions among the system components.  In these circumstances a mathematical model must be used.  In the present context ‘Multidisciplinary industrial ecology models’ which comprise technological and human components’ come under this category.
The ultimate in industrial ecology models is the incorporation of technological human and environmental components and their interactions and interrelationships in some detail.  These  are known as comprehensive industrial ecology models
Building a particular type of model depends on the objective of study.  Once the objective of study is determined, next step is to decide what type of information is required to complete the study.  Next step is to decide the extent of information and the source of information.  As an example the questions (objectives) are presented to understand the necessity of a particular type of model.
                I.            What fraction of lead in discarded computers in country A was recycled in year 2000?
             II.            What are the environmental impacts of human use of lead in country A in 2000?
          III.            How do human choices produce the environmental impacts of lead in country A in 2000?
To address each of the above questions the magnitude of the data and their sources differ and there arises a need to use a particular type of model.



Note to students

    The answers provided must be taken as guidance only. They are advised to go through the text book and are encouraged to discuss among themselves regarding a topic. 
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GEC GATE RANKS-2019

DEPARTMENT OF MECHANICAL ENGINEERING 
GATE RANKS - 2019
S.No.
Roll No.
Name
Score (Marks) 
Rank
1
16485A0333
SADAVEERASUBRAHMANYAM
39.2
20565
2
15481A0385
MADDALA RAHUL KAMAL
35.2
24919
3
15481A03C0
PALA VINAYKUMAR
24.6
41498

DEPARTMENT OF COMPUTER SCIENCE ENGINEERING
GATE RANKS-2019
S.No.
Roll No.
Name
Marks
Rank
1
15481A05F2
NANJALA NAVYA
37.0
12335
2
15481A05G8
PRATHIPATI GOWTHAMI
37.8
11672
3
15481A05N0
VELURI SIVA SANKAR REDDY
43.7
7613


DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING
                                                   GATE RANKS-2019
S.No.
Class
Roll Number
Name of the student
Marks Obtained
GATE Rank
1
IV B.Tech
15481A02C4
BIPIN POTNURU
50.67
10,216







DEPARTMENT OF INFORMATION TECHNOLOGY





                                                          GATE RANKS
S.No.
Roll No.
Name of the Student
GATE Rank
1
15481A1249
KALNEEDI CHANDRA VAMSI
10213
       
                                           DEPARTMENT OF CIVIL ENGINEERING

GATE Results 2019                     
Sl.No.
Roll Number
Name of the student
Marks
RANK
1
15481A0105
ALA VENKATESWARA RAO
29.34
19013
2
15481A0117
BOYINA HEMACHANDU
31.20
16596

DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING
GATE RESULT-2019
Sl.No.
Roll No.
Name
Marks
All India Rank
1
15481A04E5
MEDISETTY VIJAY BHASKAR
35.33
7304
2
15481A0446
DAMA AJAY BABU
35
7526
3
15481A0450
DANGATI TIRUMALA DURGA ARAVIND KUMAR
32.33
9376
4
15481A0441
CHINTA BADARI NAGASAI
31.67
9896
5
15481A0482
INKOLLU PRIYANKA
29
12164
6
15481A0431
BORRA KRANTHI KUMAR
27.67
13,480
7
15481A0492
KADIYALA DEEKSHITHA
27.67
13480
8
15481A04E1
MARRIBOINA SATYA SIVA SAI KUMAR
24
17940
9
15481A0465
GALI RATNA JYOTHI
19.33
26273


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RRB NTPC Recruitment 2019: Applications for 35,277 railway jobs to close soon


RRB NTPC Recruitment 2019: Applications for 35,277 railway jobs to close soon



Important Dates & Time

Opening Date & Time of online registration of Applications:        01.03.2019 at 18.00 hrs.
Closing Date & Time of online registration of Applications:        31.03.2019 at 23.59 hrs.
Closing Date & Time for Payment of Application Fee through Online (Net Banking/ Credit Card/ Debit Card/UPI):        05.04.2019 at 23.59 hrs.
Closing Date & Time for Payment of Application Fee through SBI Challan:        05.04.2019 at 15.00 hrs.
Closing Date & Time for Payment of Application Fee through Post Office Challan:        05.04.2019 at 15.00 hrs.
Final submission of Applications:        12.04.2019 at 23.59 hrs.
1st Stage Computer Based Test (CBT):  Tentatively scheduled between 
    June – September 2019
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