+
 
 
  E-ISSN 0976-3945  
  International Journal of Advanced Engineering Technology

                                                       -An Open Access Peer Reviewed e-Journal

 
 

  PERFORMANCE AND USE OF LOW COST, LOW HEAD GRAVITY DRIP

Authors: Patil S.T., Mane M.S. and P.M.Ingle

IJAET/ Volume VI/ Issue I/ Jan.-March.'2015/01-02

 

ABSTRACT
Konkan region has the hilly topography with the small pockets of agricultural lands. The land holding of the farmers in the region is also small (about 1200m2). In this context, the gravity drip irrigation can play a vital role in bringing the small pockets of land holding under irrigation in a cost effective manner and increase the cropping intensity in the region. The use low pressure rating pipe for operating under low gravity heads can reduce cost of micro irrigation system. The model design shows effective reduction in the cost is 26 percent over conventional drip irrigation system. The study was done for gravity heads of 1.5m, 2.5m, 4.0m and 6.0m. These heads can allow use of low pressure rating pipes and fittings for drip irrigation. Maximum lengths of lateral for 2 and 4 LPH emitter at spacing of 0.3 m, 0.6 m and 1.0 m were tested for 16 mm and 12 mm OD polytube laterals.
The results shows operating turbulent emitter of 2 and 4 LPH discharge at 1.5 m to 6.0 m heads, maximum area covered ranges from1000 m2 to 4800 m2 and 600 to 2400 m2, respectively. The pressure to operate gravity drip irrigation system can be created by converting the potential energy of stored water at high elevation. Small flows, recycled or treated waste water can also be efficiently used. Gravity irrigation system is also useful where sufficient elevation difference between canal and field is available.
Thus, the design and use the gravity drip irrigation system on low pressure causes water savings with major saving in initial cost, energy. .

  USE OF CRONBACH’S ALPHA ANALYSIS TO UNDERSTAND THE RELATIONSHIP BETWEEN HUMAN HEALTH AND CNTS
 

Authors: *Akbar Ziauddin, Dr. N.A Siddiqui, Dr. S.K Beebi

 

IJAET/ Volume VI/ Issue I/ Jan.-March.'2015/03-05

 

ABSTRACT
Multiwalled Carbon nanotubes (MWCNTs) were discovered some twenty five years ago by Sumio Lijima and are considered to be miracle materials of 21st century due to their wide spread industrial applications. The MWCNT production is expected to grow tremendously over the next ten years with an estimated capacity of 2000 tons per year by 2015 as per the projections given by National Science Foundation. Approximately 6 million workers will be employed by CNT industry by 2020. Currently, all over the world a large number of workers are involved in the production of carbon nanotubes at various companies. Occupational and public exposure to MWCNTs is increasing with growing production and use of MWCNTs in various products. Since workers are involved in handling and production of MWCNTs, occupational safety and health has to given priority while dealing with these materials. In the present investigation, the potential health risks associated with MWCNT exposure in the working environment are estimated.
A survey was conducted to get an idea about CNT manufacturing industries. A questionnaire proforma was prepared to collect data related to health effects of MWCNTs. MWCNTs can enter into the human body through inhalation and may be more biologically active because of their large surface area per unit mass compared with that of large particles. The questionnaire responses were consistent. The exposure concentration is not resulting in any health hazards due to the highest safety standards being followed by the industry.

  COMPARATIVE ASSESSMENT OF DRAG FORCE OF SEDAN CAR MODEL BY COMPUTATIONAL FLUID DYNAMICS AND EXPERIMENTAL METHOD
 

Authors: Bhagirathsinh H Zala,Harilal S Sorathia,Dinesh L. Suthar,Vashant K. Pipalia

IJAET/ Volume VI/ Issue I/ Jan.-March.'2015/06-10

 

ABSTRACT
This paper is Research about the aerodynamic of sedan car model by comparing experimentally and subsequent validation by computational fluid dynamics (CFD) The experimental investigations was performed on an open circuit suction type wind tunnel having a 30 cm x 30 cm x 100 cm test section, and maximum speed of 33 m/s on a geometrically similar, reduced scale (1:20) Aluminium car models .while the three dimensional computational analysis was carried out using with the help of software tools like ANSYS-CFX to simulate the flow of air around the automobiles ANSYS-CFX, CFD code were used to run the simulation. Computer desktop with 3.2 GHz intel core 2 duo with ram of 2.00GB is used to create and simulate the flow. The main objective of the study is to predict the drag coefficient experimentally as well as computationally. Several factors that influence the drag coefficient such as flow separation, vortex and the effect of pressure coefficient have been studied. Detail velocity profile and pressure distribution plots around the car envelopes have been presented.

  SUSTAINABLE BUILDING: AN REVIEW
 

Authors: Shashank Rathod

 

IJAET/ Volume VI/ Issue I/ Jan.-March.'2015/11-13

 

ABSTRACT
Sustainable building or green building is an outcome of a design philosophy which focuses on increasing the efficiency of resource use — energy, water, and materials. Many countries have developed their own standards for green building or energy efficiency for buildings. A recent survey by the World Business Council for Sustainable Development finds that green costs are overestimated by 300 percent, as key players in real estate and construction estimate the additional cost at 17 percent above conventional construction, more than triple the true average cost difference of about 5 percent. Green building is interpreted in many different ways, a common opinion is that they bring together a vast array of practice and techniques to reduce and ultimately eliminate the impacts of buildings on human health and the natural environment.

  SAFE HANDLING OF GAS CYLINDER AT CONSTRUCTION SITE
 

Authors: Krishna Nirmalya Sen, Dr. R.K Elangovan Dr. Shrihari, Dr. Nihal Anwar Siddiqui

 

IJAET/ Volume VI/ Issue I/ Jan.-March.'2015/18-22

 

ABSTRACT

  EFFECT OF ALUMINUM DOPING ON THE PROPERTIES OF SPRAY DEPOSITED COPPER SULFIDE (Cu2S) THIN FILMS
 

Authors: S Jahan*, M N H Liton, M K R Khan and M Mozibur Rahman

 

IJAET/ Volume VI/ Issue I/ Jan.-March.'2015/23-27

 

ABSTRACT
Undoped and aluminum doped copper sulfide (Cu2S) thin films were prepared by spray pyrolysis technique on glass substrates at 325C. Prepared films are characterized by optical and electrical properties. From the optical study, it is seen that, undoped and Al doped Cu2S thin films are good absorber materials (α > 105 order) at visible region. From the variation of absorption co-efficient with photon energy it is seen that, there is a valley of absorption co-efficient at photon energy ~ 2.0 eV. The reflectance of undoped Cu2S films is slightly high (~14%), which decreases (3-4%) with increasing Al-doping concentration. Doping of Al (up to 5 %) in Cu2S film tunes optical band gap from 2.45 eV to 2.72 eV. Refractive index, n (~2.0) and dielectric constant, ε1 (~ 4.25) for undoped Cu2S films decrease with increasing Al-doping concentration.
From Hall measurement, it is seen that, the measured value of Hall constant (RH), is positive both for undoped and Al-doped Cu2S thin films, which indicates that the Cu2S thin films are p-type semiconductors with carrier concentration of the order of 1020 to 1021 (cm-3). The Hall mobility (µH) of Cu2S films is very low and nearly equal unity. From the resistivity data it is seen that the resistivity of Cu2S thin films increases with increasing Al concentration. Temperature dependence resistivity shows metallic behavior at low temperature that is its resistivity increases with increasing temperature and reaches a maximum value at (345-370K) and then decreases with increasing temperature like a semiconductor, which indicates phase changes at this temperature range. From the measurement of activation energy, two types of conduction mechanisms are observed. At low temperature region, it may be due to impurity scattering and at high temperature region it may be due to free band transition of semiconductor.