Comparative Analysis of Velocity Measurements In Ducted Axial Fan

The paper deals with experimental investigation and comparative analysis of velocity measurements in ducted axial fan. Experiments were carried out to investigate the nature of velocity variations in a ducted axial fan at different throttle positions as a function of rotor speed employing both Pitot tube and Hot Wire Anemometer. Quantitative analyses of the magnitudes of velocity measured by a pitot tube as well as a hot wire anemometer are examined and various graphs have been plotted. The percentage errors of velocity level have been determined

SOUND SPECTRUM MEASUREMENTS IN DUCTED AXIAL FAN UNDER STABLE CONDITION AT FREQUENCY RANGE 6000 TO 6600 HZ

Performance of axial fan is found to reduce drastically when instability is encountered during its operation. Performance of an axial fan is severely impaired by many factors mostly related to system instabilities due to rotating stall and surge phenomenon experienced during its operation. The present work involves measuring the sound spectrum measurements in ducted axial fan under stable condition at frequency range from 6000 to 6600 Hz. Objective of the experiment is to measure the frequency domain signal and study the sound Characteristics in ducted axial fan by using spectrum analyser. Different types of FFT signals have been measured under stable condition for the frequency range of 6000 Hz to 6600 Hz with respect to rotor speed and different graphs are plotted for ducted axial fan

Observations on the wastage of raw material and recovery of meat in the prawn processing industry

The wastage of prawns due to spoilage in processing factories accounted to about 0-12% in 1974, 0-35% in 1975, 0-3% in 1976 and 0-4% in 1977. Spoilage increases with the time lag between catching and processing and also due to defective icing. The paper discusses the counts of whole prawns required for obtaining meat of specified size grades

Survey on the idle capacity of fish processing (freezing) plants in India - 2. East coast

The extent of idle capacity in the fish processing (freezing) plants in the east coast of India estimated by stratified random sampling and the factors responsible for the same are reported. The estimates of idle capacity of fish processing plants in the east coast for the years 1978 and 1979 were respectively 75.9% and 72.5% on the basis of 250 working days per annum and double shift per day. The percentage errors of estimates worked out to 6.9 for 1978 and 4.7 for 1979. The corresponding figures were worked out on the basis of 200 working days also. Substantial under-utilisation of plants in all the maritime states in the east coast accounted mainly to non-availability of raw material, high cost of production, shortage of power, scarcity of ice and potable water during peak season and frequent labour troubles

Advances in Medicinal Plants ed by KJ Reddy,,Birbahudur, Bbadhrayya and MLN Rao

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NilIdentifying the suitable sites for insitu and ex-situ soil and water conservation interventions with the help of survey is one of the giant tasks for planners. Considering the time consumption for conventional geographical surveys for identification of potential sites, a methodology is being developed using the remote sensing and GIS techniques to find the suitable locations for different insitu soil and water conservation interventions. Different thematic layers of slope, soil, rainfall and land use land cover was intersected in ARCGIS and the selected criteria for each intervention was applied for identifying the suitable locations. This methodology was applied for identifying the suitable locations of different insitu soil and water conservation interventions such as contour bunds, semi-circular bunds, small pits, contour bench terraces, contour ridges and stone bunds in Adilabad District of Telangana state. Among the different interventions selected, stone bunds, contour bunds and small pits are more suitable for major portion of the Adilabad District. This methodology deciphers more precise, easier and less time consuming planning technique which has the ability to process districts or even large catchments.ICAR-CRID

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Not AvailableSix levels of energy input were used to cultivate three Sali paddy varieties of different durations. Operationwise as well as source-wise energy output, energy efficiency and energy productivity for different levels of energy input in paddy varieties were determined. Studies showed that with increase in the level of mechanization, The human and animal hour requirement for paddy cultivation was reduced from 795 to 350 and 352.5 to 22.5 hr/ha, respectively. Thus mechanization helped in a substantial reduction of drudgery of human and animals. Total energy requirement for paddy cultivation in the studied six levels of energy input ranged from 5630 to 8448 MJ/ha. Energy used in paddy cultivation could be reduced by 8 to 23% through increasing the level of mechanization. Under these six input energy levels and varieties, output parameters viz., output energy, energy use efficiency and energy productivity ranged from 35456 to 85922 MJ/ha, 5.94 to 13.09 and 0.4 to 0.89 kg/MJ, respectively. For all the levels of energy input, higher values of output energy parameters were observed in the long duration variety Ranjit compared to other two varieties. The benefit-cost (B:C) ratio under different levels of energy input varied from 0.95 to 2.90.Not Availabl

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Not AvailableSix levels of energy input were used to cultivate three Sali paddy varieties of different durations. Operationwise as well as source-wise energy output, energy efficiency and energy productivity for different levels of energy input in paddy varieties were determined. Studies showed that with increase in the level of mechanization, The human and animal hour requirement for paddy cultivation was reduced from 795 to 350 and 352.5 to 22.5 hr/ha, respectively. Thus mechanization helped in a substantial reduction of drudgery of human and animals. Total energy requirement for paddy cultivation in the studied six levels of energy input ranged from 5630 to 8448 MJ/ha. Energy used in paddy cultivation could be reduced by 8 to 23% through increasing the level of mechanization. Under these six input energy levels and varieties, output parameters viz., output energy, energy use efficiency and energy productivity ranged from 35456 to 85922 MJ/ha, 5.94 to 13.09 and 0.4 to 0.89 kg/MJ, respectively. For all the levels of energy input, higher values of output energy parameters were observed in the long duration variety Ranjit compared to other two varieties. The benefit-cost (B:C) ratio under different levels of energy input varied from 0.95 to 2.90.Not Availabl